<@ULVA73B9P>
I want to keep my prefect related co...
# marvin-aim
MUHAMMAD ZEESHAN
07/31/2025, 9:35 AM@Marvin
I want to keep my prefect related configuration and installation to one EC2 server say Server1
And my application are running on other EC2 server i.e. Server2 , Server3
and i also implemented the @task, @workflow etc inside of my python code live at Server2 and Server3
How can i connect my Server2, Server3 to Prefect available in Server1?
m
Marvin
07/31/2025, 9:35 AM✅ thought for 53.3 seconds
Marvin
07/31/2025, 9:36 AMHere's the complete setup process:
1. On Server1 (Prefect Server):
Copy code
bash
# Install Prefect
pip install prefect
# Start the Prefect server
prefect server start
# Create a work pool (e.g., process-pool for running Python processes)
prefect work-pool create "my-process-pool" --type process Copy code
bash
# Install Prefect
pip install prefect
# Configure the connection to Server1
export PREFECT_API_URL="<http://SERVER1_IP:4200/api>"
# Start a worker that will execute flows
prefect worker start -p "my-process-pool" Copy code
python
from prefect import flow, task
@task
def my_task():
return "Hello from remote server!"
@flow
def my_flow():
result = my_task()
return result Copy code
python
# Add this to your flow code
if __name__ == "__main__":
my_flow.deploy(
name="my-remote-flow",
work_pool_name="my-process-pool"
)PREFECT_API_URL Copy code
bash
prefect worker ls Copy code
bash
prefect flow-run lsm
MUHAMMAD ZEESHAN
07/31/2025, 9:42 AM@Marvin
i want to make these process production ready and want to avoid to write any command manyally
m
Marvin
07/31/2025, 9:42 AM✅ thought for 63.4 seconds
Marvin
07/31/2025, 9:43 AMI'll provide you with a complete automation setup for both your Prefect server (Server1) and workers (Server2, Server3). Here's how to make it production-ready:
1. Server1 (Prefect Server) Setup
Create these files:
`/etc/prefect/server.env`:
Copy code
bash
PREFECT_SERVER_API_HOST=0.0.0.0
PREFECT_SERVER_API_PORT=4200
# Add any other server-specific environment variables Copy code
ini
[Unit]
Description=Prefect Server
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/server.env
ExecStart=/usr/local/bin/prefect server start
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target Copy code
bash
PREFECT_API_URL=<http://SERVER1_IP:4200/api>
# Add any other worker-specific environment variables
PYTHONPATH=/path/to/your/application
# Add any application-specific environment variables Copy code
ini
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/worker.env
ExecStart=/usr/local/bin/prefect worker start -p "my-process-pool"
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target Copy code
bash
#!/bin/bash
# Create prefect user
sudo useradd -r -s /bin/false prefect
# Create necessary directories
sudo mkdir -p /etc/prefect
sudo mkdir -p /var/log/prefect
sudo chown -R prefect:prefect /var/log/prefect
# Install Prefect and dependencies
sudo pip3 install prefect
# Copy configuration files
sudo cp server.env /etc/prefect/
sudo chown -R prefect:prefect /etc/prefect
# Copy and enable systemd service
sudo cp prefect-server.service /etc/systemd/system/
sudo systemctl daemon-reload
sudo systemctl enable prefect-server
sudo systemctl start prefect-server
# Create work pool
sudo -u prefect prefect work-pool create "my-process-pool" --type process Copy code
bash
#!/bin/bash
# Create prefect user
sudo useradd -r -s /bin/false prefect
# Create necessary directories
sudo mkdir -p /etc/prefect
sudo mkdir -p /var/log/prefect
sudo chown -R prefect:prefect /var/log/prefect
# Install Prefect and your application dependencies
sudo pip3 install prefect
# Add any other required pip installations for your application
# Copy configuration files
sudo cp worker.env /etc/prefect/
sudo chown -R prefect:prefect /etc/prefect
# Copy and enable systemd service
sudo cp prefect-worker.service /etc/systemd/system/
sudo systemctl daemon-reload
sudo systemctl enable prefect-worker
sudo systemctl start prefect-workerdeployment_config.py Copy code
python
from prefect import flow
from prefect.deployments import Deployment
from your_flow_module import my_flow # Import your flow
def create_deployment():
deployment = my_flow.deploy(
name="my-production-flow",
work_pool_name="my-process-pool",
tags=["production"]
)
if __name__ == "__main__":
create_deployment()/etc/rsyslog.d/prefect.conf Copy code
if $programname == 'prefect' then /var/log/prefect/prefect.log
& stop Copy code
bash
sudo chmod +x /opt/prefect/setup_server.sh
sudo /opt/prefect/setup_server.sh Copy code
bash
sudo chmod +x /opt/prefect/setup_worker.sh
sudo /opt/prefect/setup_worker.shMarvin
07/31/2025, 9:43 AMsudo systemctl restart prefect-server # On Server1
sudo systemctl restart prefect-worker # On Server2/3
```
This setup provides:
- Automatic startup on system boot
- Process monitoring and automatic restart on failure
- Proper logging
- Separation of configuration from code
- Clear service management through systemd
- Proper user permissions and security
Additional Recommendations:
1. Consider adding monitoring solutions like Prometheus/Grafana
2. Set up log rotation for the Prefect logs
3. Use configuration management tools like Ansible for automated deployment
4. Implement proper backup strategies for the Prefect database
5. Set up alerts for worker/server failures
Would you like me to elaborate on any of these aspects or provide more specific details for your particular use case?
m
MUHAMMAD ZEESHAN
07/31/2025, 10:04 AM@Marvin
zope.interface 6.1
(.venv) root@ip-192-168-0-112:/opt# uv pip install prefect
Resolved 92 packages in 61ms
Installed 1 package in 28ms
+ prefect==3.4.10
(.venv) root@ip-192-168-0-112:/opt# prefect
Traceback (most recent call last):
File "/opt/.venv/bin/prefect", line 4, in <module>
from prefect.cli import app
File "/opt/.venv/lib/python3.13/site-packages/prefect/cli/__init__.py", line 1, in <module>
import prefect.settings
File "/opt/.venv/lib/python3.13/site-packages/prefect/settings/__init__.py", line 13, in <module>
from prefect.settings.legacy import (
...<3 lines>...
)
File "/opt/.venv/lib/python3.13/site-packages/prefect/settings/legacy.py", line 6, in <module>
from pydantic import AliasChoices
File "/opt/.venv/lib/python3.13/site-packages/pydantic/__init__.py", line 5, in <module>
from ._migration import getattr_migration
File "/opt/.venv/lib/python3.13/site-packages/pydantic/_migration.py", line 4, in <module>
from .version import version_short
File "/opt/.venv/lib/python3.13/site-packages/pydantic/version.py", line 5, in <module>
from pydantic_core import version as __pydantic_core_version__
File "/opt/.venv/lib/python3.13/site-packages/pydantic_core/__init__.py", line 6, in <module>
from ._pydantic_core import (
...<22 lines>...
)
ImportError: /opt/.venv/lib/python3.13/site-packages/pydantic_core/_pyd
m
Marvin
07/31/2025, 10:04 AM✅ thought for 12.8 seconds
Marvin
07/31/2025, 10:04 AMFor a production environment, I would strongly recommend using a stable Python version instead of the alpha version 3.13. Prefect 3.4.10 is officially supported on Python 3.8 through 3.11.
Here's what you should do:
1. First, remove the current virtual environment:
Copy code
bash
rm -rf /opt/.venv Copy code
bash
# On Ubuntu/Debian
sudo apt update
sudo apt install python3.11 python3.11-venv
# Or if you're on Amazon Linux/RHEL
sudo yum install python3.11 python3.11-devel Copy code
bash
python3.11 -m venv /opt/.venv Copy code
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source /opt/.venv/bin/activate
pip install --upgrade pip
pip install prefect==3.4.10m
MUHAMMAD ZEESHAN
07/31/2025, 10:09 AM@Marvin
i have python 3.12.3
and now after recreating
m
Marvin
07/31/2025, 10:09 AM✅ thought for 32.3 seconds
Marvin
07/31/2025, 10:10 AMCould you please share the complete error message you're getting after recreating the virtual environment? This will help me provide the most accurate solution.
In the meantime, here's what I recommend for a clean installation with Python 3.12.3:
1. First, let's make sure we start fresh:
Copy code
bash
# Remove existing venv if present
rm -rf /opt/.venv
# Create new venv with Python 3.12.3
python3.12 -m venv /opt/.venv
# Activate the venv
source /opt/.venv/bin/activate
# Upgrade pip
python -m pip install --upgrade pip Copy code
bash
pip install "prefect==3.4.10" "pydantic>=2.0.0" "pydantic-core>=2.0.0"pip freezem
MUHAMMAD ZEESHAN
07/31/2025, 10:12 AM@Marvin
For above systemed commad
should i explicitly create prefect dir inside of /etc/?
(.venv) root@ip-192-168-0-112:/etc# cd prefect
bash: cd: prefect: No such file or directory
(.venv) root@ip-192-168-0-112:/etc#
m
Marvin
07/31/2025, 10:12 AM✅ thought for 14.1 seconds
Marvin
07/31/2025, 10:13 AMYes, you'll need to create these directories and files explicitly. Let me provide you with the complete commands to set up the directory structure and files:
For Server1 (Prefect Server):
Copy code
bash
# Create necessary directories
sudo mkdir -p /etc/prefect
sudo mkdir -p /var/log/prefect
# Create the prefect user and group
sudo useradd -r -s /bin/false prefect
# Set proper ownership
sudo chown -R prefect:prefect /etc/prefect
sudo chown -R prefect:prefect /var/log/prefect
# Create and populate the server environment file
sudo tee /etc/prefect/server.env << 'EOF'
PREFECT_SERVER_API_HOST=0.0.0.0
PREFECT_SERVER_API_PORT=4200
# Add any other server-specific environment variables here
EOF
# Create the systemd service file
sudo tee /etc/systemd/system/prefect-server.service << 'EOF'
[Unit]
Description=Prefect Server
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/server.env
ExecStart=/opt/.venv/bin/prefect server start
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
# Create necessary directories
sudo mkdir -p /etc/prefect
sudo mkdir -p /var/log/prefect
# Create the prefect user and group
sudo useradd -r -s /bin/false prefect
# Set proper ownership
sudo chown -R prefect:prefect /etc/prefect
sudo chown -R prefect:prefect /var/log/prefect
# Create and populate the worker environment file
sudo tee /etc/prefect/worker.env << 'EOF'
PREFECT_API_URL=<http://SERVER1_IP:4200/api>
PYTHONPATH=/path/to/your/application
# Add any application-specific environment variables here
EOF
# Create the systemd service file
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/worker.env
ExecStart=/opt/.venv/bin/prefect worker start -p "my-process-pool"
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
# Reload systemd to recognize new service files
sudo systemctl daemon-reload
# For Server1:
sudo systemctl enable prefect-server
sudo systemctl start prefect-server
# For Server2 and Server3:
sudo systemctl enable prefect-worker
sudo systemctl start prefect-worker
# Check the status
sudo systemctl status prefect-server # On Server1
sudo systemctl status prefect-worker # On Server2/3/opt/.venv/bin/prefectSERVER1_IPPYTHONPATHprefect Copy code
bash
# Check logs
sudo journalctl -u prefect-server -f # On Server1
sudo journalctl -u prefect-worker -f # On Server2/3
# Check if the services are running
sudo systemctl is-active prefect-server # Should return "active"
sudo systemctl is-active prefect-worker # Should return "active"m
MUHAMMAD ZEESHAN
07/31/2025, 10:25 AM@Marvin
while start precect service on server1
Created symlink /etc/systemd/system/multi-user.target.wants/prefect-server.service → /etc/systemd/system/prefect-server.service.
(.venv) root@ip-192-168-0-112:/etc/prefect# systemctl status prefect-server
● prefect-server.service - Prefect Server
Loaded: loaded (/etc/systemd/system/prefect-server.service; enabled; preset: enabled)
Active: active (running) since Thu 2025-07-31 102423 UTC; 5s ago
Main PID: 2132 (prefect)
Tasks: 1 (limit: 2067)
Memory: 150.6M (peak: 151.0M)
CPU: 5.826s
CGroup: /system.slice/prefect-server.service
└─2132 /opt/.venv/bin/python3 /opt/.venv/bin/prefect server start
Jul 31 102428 ip-192-168-0-112 prefect[2132]: File "/opt/.venv/lib/python3.12/site-packages/aiosqlite/core.py", line 105, in run
Jul 31 102428 ip-192-168-0-112 prefect[2132]: result = function()
Jul 31 102428 ip-192-168-0-112 prefect[2132]: ^^^^^^^^^^
Jul 31 102428 ip-192-168-0-112 prefect[2132]: File "/opt/.venv/lib/python3.12/site-packages/aiosqlite/core.py", line 382, in connector
Jul 31 102428 ip-192-168-0-112 prefect[2132]: return sqlite3.connect(loc, **kwargs)
Jul 31 102428 ip-192-168-0-112 prefect[2132]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 102428 ip-192-168-0-112 prefect[2132]: sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) unable to open database file
Jul 31 102428 ip-192-168-0-112 prefect[2132]: (Background on this error at: https://sqlalche.me/e/20/e3q8)
Jul 31 102428 ip-192-168-0-112 prefect[2132]: ERROR: Application startup failed. Exiting.
Jul 31 102428 ip-192-168-0-112 prefect[2132]: Server stopped!
(.venv) root@ip-192-168-0-112:/etc/prefect#
m
Marvin
07/31/2025, 10:25 AM✅ thought for 10.9 seconds
Marvin
07/31/2025, 10:25 AMThis error occurs because the
prefect Copy code
bash
# Create directory for Prefect database
sudo mkdir -p /var/lib/prefect
sudo chown prefect:prefect /var/lib/prefect
# Update the server environment file to specify the database location
sudo tee /etc/prefect/server.env << 'EOF'
PREFECT_SERVER_API_HOST=0.0.0.0
PREFECT_SERVER_API_PORT=4200
PREFECT_SERVER_DATABASE_CONNECTION_URL=sqlite+aiosqlite:////var/lib/prefect/prefect.db
EOF
# Make sure the environment file has correct permissions
sudo chown prefect:prefect /etc/prefect/server.env Copy code
bash
sudo tee /etc/systemd/system/prefect-server.service << 'EOF'
[Unit]
Description=Prefect Server
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/server.env
WorkingDirectory=/var/lib/prefect
ExecStart=/opt/.venv/bin/prefect server start
Restart=always
RestartSec=5
# Ensure the service has access to create files
ReadWritePaths=/var/lib/prefect
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
# Reload systemd to recognize changes
sudo systemctl daemon-reload
# Restart the Prefect server service
sudo systemctl restart prefect-server
# Check the status
sudo systemctl status prefect-server
# If you need to see more detailed logs
sudo journalctl -u prefect-server -f Copy code
bash
# Give prefect user access to the virtual environment
sudo chown -R prefect:prefect /opt/.venv Copy code
bash
# Check permissions of key directories
ls -la /var/lib/prefect
ls -la /etc/prefect
ls -la /opt/.venvm
MUHAMMAD ZEESHAN
07/31/2025, 10:28 AM@Marvin
Started prefect-server.service - Prefect Server.
(.venv) root@ip-192-168-0-112:/etc/prefect# sudo journalctl -u prefect-server -f
Jul 31 102720 ip-192-168-0-112 prefect[2293]: _ _ _ _ _ _ _____
Jul 31 102720 ip-192-168-0-112 prefect[2293]: | _ \ _ \ __| __| __/ _| _|
Jul 31 102720 ip-192-168-0-112 prefect[2293]: | _/ / _|| _|| | (_ | |
Jul 31 102720 ip-192-168-0-112 prefect[2293]: |_| |_|_\___|_| |___\___| |_|
Jul 31 102720 ip-192-168-0-112 prefect[2293]: Configure Prefect to communicate with the server with:
Jul 31 102720 ip-192-168-0-112 prefect[2293]: prefect config set PREFECT_API_URL=http://0.0.0.0:4200/api
Jul 31 102720 ip-192-168-0-112 prefect[2293]: View the API reference documentation at http://0.0.0.0:4200/docs
Jul 31 102720 ip-192-168-0-112 prefect[2293]: Check out the dashboard at http://0.0.0.0:4200
Jul 31 102722 ip-192-168-0-112 prefect[2293]: 102722.873 | WARNING | prefect.server - Unable to write to memo_store.toml at /home/prefect/.prefect/memo_store.toml after block auto-registration: FileNotFoundError(2, 'No such file or directory').
Jul 31 102722 ip-192-168-0-112 prefect[2293]: Subsequent server start ups will perform block auto-registration, which may result in slower server startup.
m
Marvin
07/31/2025, 10:28 AM✅ thought for 9.6 seconds
Marvin
07/31/2025, 10:28 AMThe Prefect server is now running successfully! The warning message is about a missing directory for the memo store, which we can easily fix. Let's create the necessary directory structure for the prefect user:
Copy code
bash
# Create .prefect directory in prefect user's home
sudo mkdir -p /home/prefect/.prefect
sudo chown -R prefect:prefect /home/prefect/.prefect Copy code
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sudo systemctl restart prefect-server/etc/prefect/worker.env Copy code
bash
PREFECT_API_URL=<http://SERVER1_IP:4200/api> Copy code
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prefect config set PREFECT_API_URL=<http://SERVER1_IP:4200/api> Copy code
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sudo -u prefect /opt/.venv/bin/prefect work-pool create "my-process-pool" --type process Copy code
bash
sudo systemctl start prefect-workerm
MUHAMMAD ZEESHAN
07/31/2025, 10:31 AM@Marvin
my nginx is runnign over there
so iwant to make a nginx config so taht i can accesss using reverse proxsy
m
Marvin
07/31/2025, 10:31 AM✅ thought for 24.1 seconds
Marvin
07/31/2025, 10:32 AMI'll help you set up Nginx as a reverse proxy for Prefect. Let me create a secure and production-ready Nginx configuration.
First, let's verify the current Prefect server ports and create an appropriate Nginx configuration:
Copy code
bash
# Create a new Nginx configuration file for Prefect
sudo tee /etc/nginx/conf.d/prefect.conf << 'EOF'
server {
listen 80;
# Replace with your domain or IP
server_name <http://prefect.yourdomain.com|prefect.yourdomain.com>;
# Security headers
add_header X-Frame-Options "SAMEORIGIN";
add_header X-XSS-Protection "1; mode=block";
add_header X-Content-Type-Options "nosniff";
add_header Referrer-Policy "strict-origin-when-cross-origin";
# Proxy headers
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
# WebSocket support (required for some Prefect features)
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
# Main location block for Prefect UI and API
location / {
proxy_pass <http://localhost:4200;>
proxy_buffering off;
proxy_read_timeout 300s;
proxy_connect_timeout 75s;
}
# Specific location for API endpoints
location /api {
proxy_pass <http://localhost:4200/api;>
proxy_buffering off;
proxy_read_timeout 300s;
proxy_connect_timeout 75s;
}
# Location for API documentation
location /docs {
proxy_pass <http://localhost:4200/docs;>
proxy_buffering off;
}
# Location for OpenAPI schema
location /openapi.json {
proxy_pass <http://localhost:4200/openapi.json;>
proxy_buffering off;
}
}
EOF/etc/prefect/server.env Copy code
bash
sudo tee /etc/prefect/server.env << 'EOF'
PREFECT_SERVER_API_HOST=127.0.0.1
PREFECT_SERVER_API_PORT=4200
PREFECT_SERVER_DATABASE_CONNECTION_URL=sqlite+aiosqlite:////var/lib/prefect/prefect.db
EOF Copy code
bash
sudo nginx -t Copy code
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sudo systemctl reload nginx Copy code
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sudo systemctl restart prefect-server/etc/prefect/worker.env Copy code
bash
sudo tee /etc/prefect/worker.env << 'EOF'
PREFECT_API_URL=<http://prefect.yourdomain.com/api>
PYTHONPATH=/path/to/your/application
EOFMarvin
07/31/2025, 10:32 AMproxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
# WebSocket support
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
location / {
proxy_pass http://localhost:4200;
proxy_buffering off;
proxy_read_timeout 300s;
proxy_connect_timeout 75s;
}
location /api {
proxy_pass http://localhost:4200/api;
proxy_buffering off;
proxy_read_timeout 300s;
proxy_connect_timeout 75s;
}
location /docs {
proxy_pass http://localhost:4200/docs;
proxy_buffering off;
}
location /openapi.json {
proxy_pass http://localhost:4200/openapi.json;
proxy_buffering off;
}
}
EOF
Copy code
To verify the setup:
1. Check Nginx status:
```bash
sudo systemctl status nginx Copy code
bash
curl -I <http://prefect.yourdomain.com> Copy code
bash
curl -I <http://prefect.yourdomain.com/api/health><http://prefect.yourdomain.com|prefect.yourdomain.com> Copy code
bash
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp # if using HTTPSm
MUHAMMAD ZEESHAN
07/31/2025, 10:35 AM@Marvin
This is the existing config
server {
server_name prefect.happyraisins.com;
root /var/www/prefect.happyraisins.com;
index index.html index.htm;
location / {
try_files $uri $uri/ =404;
}
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/prefect.happyraisins.com/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/prefect.happyraisins.com/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
if ($host = prefect.happyraisins.com) {
return 301 https://$host$request_uri;
} # managed by Certbot
listen 80;
server_name prefect.happyraisins.com;
return 404; # managed by Certbot
}
m
Marvin
07/31/2025, 10:35 AM✅ thought for 20.0 seconds
Marvin
07/31/2025, 10:35 AMI'll help you modify your existing Nginx configuration to include the Prefect reverse proxy while maintaining your SSL settings. Here's the updated configuration:
Copy code
nginx
server {
server_name <http://prefect.happyraisins.com|prefect.happyraisins.com>;
# Proxy headers
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
# WebSocket support (required for Prefect)
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
# Security headers
add_header X-Frame-Options "SAMEORIGIN";
add_header X-XSS-Protection "1; mode=block";
add_header X-Content-Type-Options "nosniff";
add_header Referrer-Policy "strict-origin-when-cross-origin";
# Main location block for Prefect UI and API
location / {
proxy_pass <http://localhost:4200;>
proxy_buffering off;
proxy_read_timeout 300s;
proxy_connect_timeout 75s;
}
# Specific location for API endpoints
location /api {
proxy_pass <http://localhost:4200/api;>
proxy_buffering off;
proxy_read_timeout 300s;
proxy_connect_timeout 75s;
}
# Location for API documentation
location /docs {
proxy_pass <http://localhost:4200/docs;>
proxy_buffering off;
}
# Location for OpenAPI schema
location /openapi.json {
proxy_pass <http://localhost:4200/openapi.json;>
proxy_buffering off;
}
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/prefect.happyraisins.com/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/prefect.happyraisins.com/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
if ($host = <http://prefect.happyraisins.com|prefect.happyraisins.com>) {
return 301 https://$host$request_uri;
} # managed by Certbot
listen 80;
server_name <http://prefect.happyraisins.com|prefect.happyraisins.com>;
return 404; # managed by Certbot
} Copy code
bash
sudo tee /etc/prefect/server.env << 'EOF'
PREFECT_SERVER_API_HOST=127.0.0.1
PREFECT_SERVER_API_PORT=4200
PREFECT_SERVER_DATABASE_CONNECTION_URL=sqlite+aiosqlite:////var/lib/prefect/prefect.db
EOF Copy code
bash
sudo nginx -t Copy code
bash
sudo systemctl reload nginx Copy code
bash
sudo systemctl restart prefect-server Copy code
bash
sudo tee /etc/prefect/worker.env << 'EOF'
PREFECT_API_URL=<https://prefect.happyraisins.com/api>
PYTHONPATH=/path/to/your/application
EOF Copy code
bash
# Test the UI access
curl -I <https://prefect.happyraisins.com>
# Test the API access
curl -I <https://prefect.happyraisins.com/api/health>m
MUHAMMAD ZEESHAN
07/31/2025, 10:44 AM@Marvin
nv) root@ip-192-168-0-112:/etc/nginx/sites-available# sudo systemctl status prefect-server
● prefect-server.service - Prefect Server
Loaded: loaded (/etc/systemd/system/prefect-server.service; enabled; preset: enabled)
Active: active (running) since Thu 2025-07-31 104252 UTC; 54s ago
Main PID: 2454 (prefect)
Tasks: 8 (limit: 2067)
Memory: 162.2M (peak: 162.6M)
CPU: 6.398s
CGroup: /system.slice/prefect-server.service
└─2454 /opt/.venv/bin/python3 /opt/.venv/bin/prefect server start
Jul 31 104332 ip-192-168-0-112 prefect[2454]: File "/opt/.venv/lib/python3.12/site-packages/anyio/to_thread.py", line 56, in run_sync
Jul 31 104332 ip-192-168-0-112 prefect[2454]: return await get_async_backend().run_sync_in_worker_thread(
Jul 31 104332 ip-192-168-0-112 prefect[2454]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 104332 ip-192-168-0-112 prefect[2454]: File "/opt/.venv/lib/python3.12/site-packages/anyio/_backends/_asyncio.py", line 2470, in run_sync_in_worker_thr>
Jul 31 104332 ip-192-168-0-112 prefect[2454]: return await future
Jul 31 104332 ip-192-168-0-112 prefect[2454]: ^^^^^^^^^^^^
Jul 31 104332 ip-192-168-0-112 prefect[2454]: File "/opt/.venv/lib/python3.12/site-packages/anyio/_backends/_asyncio.py", line 967, in run
Jul 31 104332 ip-192-168-0-112 prefect[2454]: result = context.run(func, *args)
Jul 31 104332 ip-192-168-0-112 prefect[2454]: ^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 104332 ip-192-168-0-112 prefect[2454]: PermissionError: [Errno 13] Permission denied: '/opt/.venv/lib/python3.12/site-packages/prefect/server/ui_build/in>
lines 1-20/20 (END)
m
Marvin
07/31/2025, 10:44 AM✅ thought for 13.5 seconds
Marvin
07/31/2025, 10:44 AMThis error indicates a permission issue with the Prefect UI build directory. Let's fix the permissions for all necessary directories:
Copy code
bash
# Fix permissions for the entire virtual environment
sudo chown -R prefect:prefect /opt/.venv
# Fix permissions for Prefect's working directories
sudo chown -R prefect:prefect /var/lib/prefect
sudo chown -R prefect:prefect /home/prefect/.prefect
# Ensure the UI build directory is writable
sudo chmod -R 755 /opt/.venv/lib/python3.12/site-packages/prefect/server/ui_build
# Double check the prefect user's home directory exists and has correct permissions
sudo mkdir -p /home/prefect
sudo chown -R prefect:prefect /home/prefect Copy code
bash
sudo tee /etc/systemd/system/prefect-server.service << 'EOF'
[Unit]
Description=Prefect Server
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/server.env
WorkingDirectory=/var/lib/prefect
# Ensure the service has access to necessary directories
ReadWritePaths=/var/lib/prefect
ReadWritePaths=/opt/.venv
ReadWritePaths=/home/prefect/.prefect
ExecStart=/opt/.venv/bin/prefect server start
Restart=always
RestartSec=5
# Set environment variables
Environment=HOME=/home/prefect
Environment=PYTHONPATH=/opt/.venv/lib/python3.12/site-packages
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
# Reload systemd configuration
sudo systemctl daemon-reload
# Restart Prefect server
sudo systemctl restart prefect-server
# Check the status
sudo systemctl status prefect-server
# If you need to see more detailed logs
sudo journalctl -u prefect-server -f Copy code
bash
# Check if SELinux is enabled
getenforce
# If it returns "Enforcing", you might need to set the correct context:
sudo chcon -R -t httpd_sys_content_t /opt/.venv/lib/python3.12/site-packages/prefect/server/ui_build Copy code
bash
# Check the service status again
sudo systemctl status prefect-server Copy code
bash
# Check if the server is responding
curl -I <http://localhost:4200>
# Check if it's accessible through your nginx proxy
curl -I <https://prefect.happyraisins.com>m
MUHAMMAD ZEESHAN
07/31/2025, 10:55 AM@Marvin
on server no error are showing
but on UI side its showing
Can't connect to Server API at http://127.0.0.1:4200/api. Check that it's accessible from your machine.
also unable to create any variable through UI etc
m
Marvin
07/31/2025, 10:55 AM✅ thought for 19.7 seconds
Marvin
07/31/2025, 10:55 AMThe error occurs because the UI is trying to connect to
<http://127.0.0.1:4200/api> Copy code
bash
sudo tee /etc/prefect/server.env << 'EOF'
PREFECT_SERVER_API_HOST=127.0.0.1
PREFECT_SERVER_API_PORT=4200
PREFECT_SERVER_DATABASE_CONNECTION_URL=sqlite+aiosqlite:////var/lib/prefect/prefect.db
PREFECT_UI_API_URL=<https://prefect.happyraisins.com/api>
EOF Copy code
bash
sudo tee /etc/nginx/sites-available/prefect.happyraisins.com << 'EOF'
server {
server_name <http://prefect.happyraisins.com|prefect.happyraisins.com>;
# Proxy headers
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
# WebSocket support
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_buffering off;
# Increase timeouts for long-running requests
proxy_read_timeout 300s;
proxy_connect_timeout 75s;
location / {
proxy_pass <http://127.0.0.1:4200;>
# Add CORS headers
add_header 'Access-Control-Allow-Origin' '*' always;
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE' always;
add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always;
if ($request_method = 'OPTIONS') {
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE';
add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization';
add_header 'Access-Control-Max-Age' 1728000;
add_header 'Content-Type' 'text/plain; charset=utf-8';
add_header 'Content-Length' 0;
return 204;
}
}
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/prefect.happyraisins.com/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/prefect.happyraisins.com/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
if ($host = <http://prefect.happyraisins.com|prefect.happyraisins.com>) {
return 301 https://$host$request_uri;
}
listen 80;
server_name <http://prefect.happyraisins.com|prefect.happyraisins.com>;
return 404;
}
EOF Copy code
bash
# Test Nginx configuration
sudo nginx -t
# If test is successful, reload Nginx
sudo systemctl reload nginx
# Restart Prefect server
sudo systemctl restart prefect-server Copy code
bash
# Configure Prefect to use your domain
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api> Copy code
bash
# Check if the API is accessible
curl -I <https://prefect.happyraisins.com/api/health>
# Check if you can get the OpenAPI schema
curl -I <https://prefect.happyraisins.com/api/openapi.json> Copy code
<https://prefect.happyraisins.com> Copy code
bash
# Check Prefect server logs
sudo journalctl -u prefect-server -f
# Check Nginx access and error logs
sudo tail -f /var/log/nginx/access.log
sudo tail -f /var/log/nginx/error.logMarvin
07/31/2025, 10:55 AM# If needed, allow the ports
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp
```
Would you like me to:
1. Help troubleshoot any specific errors you're seeing?
2. Show how to verify the API connectivity?
3. Guide you through testing the variable creation through the API directly?
m
MUHAMMAD ZEESHAN
07/31/2025, 11:05 AM@Marvin
now issue resolved and system is working fine
can you document me whole configuration for server 1
from installation to setup to nginx cnofig and also add the problems and their solution section at end
in markdown format
m
Marvin
07/31/2025, 11:05 AM✅ thought for 41.5 seconds
Marvin
07/31/2025, 11:06 AM# Prefect Server Setup Documentation (Server1)
## Table of Contents
1. #Prerequisites
2. <#python-and-virtual-environment-setup|Python and Virtual Environment Setup>
3. <#prefect-installation-and-configuration|Prefect Installation and Configuration>
4. <#system-service-configuration|System Service Configuration>
5. <#nginx-configuration|Nginx Configuration>
6. <#directory-structure-and-permissions|Directory Structure and Permissions>
7. <#common-issues-and-solutions|Common Issues and Solutions>
## Prerequisites
- Ubuntu/Debian-based system
- Python 3.12.3
- Nginx installed
- SSL certificates (using Certbot)
- Root or sudo access
## Python and Virtual Environment Setup
Copy code
bash
# Create directory for the virtual environment
sudo mkdir -p /opt/.venv
# Create virtual environment
python3.12 -m venv /opt/.venv
# Activate virtual environment
source /opt/.venv/bin/activate
# Upgrade pip
python -m pip install --upgrade pip Copy code
bash
# Install Prefect
pip install prefect==3.4.10 Copy code
bash
# Create prefect user
sudo useradd -r -s /bin/false prefect
# Create necessary directories
sudo mkdir -p /etc/prefect
sudo mkdir -p /var/lib/prefect
sudo mkdir -p /var/log/prefect
sudo mkdir -p /home/prefect/.prefect
# Set proper ownership
sudo chown -R prefect:prefect /etc/prefect
sudo chown -R prefect:prefect /var/lib/prefect
sudo chown -R prefect:prefect /var/log/prefect
sudo chown -R prefect:prefect /home/prefect
sudo chown -R prefect:prefect /opt/.venv Copy code
bash
sudo tee /etc/prefect/server.env << 'EOF'
PREFECT_SERVER_API_HOST=127.0.0.1
PREFECT_SERVER_API_PORT=4200
PREFECT_SERVER_DATABASE_CONNECTION_URL=sqlite+aiosqlite:////var/lib/prefect/prefect.db
PREFECT_UI_API_URL=<https://prefect.happyraisins.com/api>
EOF Copy code
bash
sudo tee /etc/systemd/system/prefect-server.service << 'EOF'
[Unit]
Description=Prefect Server
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/server.env
WorkingDirectory=/var/lib/prefect
# Ensure the service has access to necessary directories
ReadWritePaths=/var/lib/prefect
ReadWritePaths=/opt/.venv
ReadWritePaths=/home/prefect/.prefect
ExecStart=/opt/.venv/bin/prefect server start
Restart=always
RestartSec=5
# Set environment variables
Environment=HOME=/home/prefect
Environment=PYTHONPATH=/opt/.venv/lib/python3.12/site-packages
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
sudo systemctl daemon-reload
sudo systemctl enable prefect-server
sudo systemctl start prefect-serverMarvin
07/31/2025, 11:06 AMif ($request_method = 'OPTIONS') {
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE';
add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization';
add_header 'Access-Control-Max-Age' 1728000;
add_header 'Content-Type' 'text/plain; charset=utf-8';
add_header 'Content-Length' 0;
return 204;
}
}
listen 443 ssl;
ssl_certificate /etc/letsencrypt/live/prefect.happyraisins.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/prefect.happyraisins.com/privkey.pem;
include /etc/letsencrypt/options-ssl-nginx.conf;
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
}
server {
if ($host = prefect.happyraisins.com) {
return 301 https://$host$request_uri;
}
listen 80;
server_name prefect.happyraisins.com;
return 404;
}
Copy code
Enable the configuration:
```bash
sudo ln -s /etc/nginx/sites-available/prefect.happyraisins.com /etc/nginx/sites-enabled/
sudo nginx -t
sudo systemctl reload nginx Copy code
bash
/opt/.venv # Virtual environment (prefect:prefect)
/etc/prefect # Configuration files (prefect:prefect)
/var/lib/prefect # Prefect data directory (prefect:prefect)
/var/log/prefect # Log files (prefect:prefect)
/home/prefect/.prefect # Prefect user home directory (prefect:prefect) Copy code
bash
sudo chown -R prefect:prefect /opt/.venv
sudo chmod -R 755 /opt/.venv/lib/python3.12/site-packages/prefect/server/ui_buildPREFECT_UI_API_URL Copy code
bash
sudo chown -R prefect:prefect /var/lib/prefect
sudo chmod 755 /var/lib/prefectsudo journalctl -u prefect-server -fsudo systemctl status prefect-serversudo tail -f /var/log/nginx/error.log Copy code
bash
sudo systemctl status prefect-server Copy code
bash
curl -I <https://prefect.happyraisins.com/api/health> Copy code
bash
sudo journalctl -u prefect-server -f
sudo tail -f /var/log/nginx/error.log Copy code
<https://prefect.happyraisins.com>m
MUHAMMAD ZEESHAN
07/31/2025, 11:38 AM@Marvin
i made installation using uv
so please update that
m
Marvin
07/31/2025, 11:38 AM✅ thought for 32.5 seconds
Marvin
07/31/2025, 11:39 AMI'll update the documentation to reflect the installation using
uv Copy code
bash
# Create directory for the virtual environment
sudo mkdir -p /opt/.venv
# Create virtual environment
python3.12 -m venv /opt/.venv
# Activate virtual environment
source /opt/.venv/bin/activate
# Install uv (the fast Python package installer)
curl -LsSf <https://astral.sh/uv/install.sh> | sh
# Add uv to your PATH if needed
export PATH="/root/.cargo/bin:$PATH" Copy code
bash
# Install Prefect using uv
uv pip install prefect==3.4.10
# Verify installation
prefect version Copy code
bash
# Create prefect user
sudo useradd -r -s /bin/false prefect
# Create necessary directories
sudo mkdir -p /etc/prefect
sudo mkdir -p /var/lib/prefect
sudo mkdir -p /var/log/prefect
sudo mkdir -p /home/prefect/.prefect
# Set proper ownership
sudo chown -R prefect:prefect /etc/prefect
sudo chown -R prefect:prefect /var/lib/prefect
sudo chown -R prefect:prefect /var/log/prefect
sudo chown -R prefect:prefect /home/prefect
sudo chown -R prefect:prefect /opt/.venv Copy code
bash
sudo tee /etc/prefect/server.env << 'EOF'
PREFECT_SERVER_API_HOST=127.0.0.1
PREFECT_SERVER_API_PORT=4200
PREFECT_SERVER_DATABASE_CONNECTION_URL=sqlite+aiosqlite:////var/lib/prefect/prefect.db
PREFECT_UI_API_URL=<https://prefect.happyraisins.com/api>
EOF Copy code
bash
sudo tee /etc/systemd/system/prefect-server.service << 'EOF'
[Unit]
Description=Prefect Server
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/server.env
WorkingDirectory=/var/lib/prefect
# Ensure the service has access to necessary directories
ReadWritePaths=/var/lib/prefect
ReadWritePaths=/opt/.venv
ReadWritePaths=/home/prefect/.prefect
ExecStart=/opt/.venv/bin/prefect server start
Restart=always
RestartSec=5
# Set environment variables
Environment=HOME=/home/prefect
Environment=PYTHONPATH=/opt/.venv/lib/python3.12/site-packages
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
sudo systemctl daemon-reload
sudo systemctl enable prefect-server
sudo systemctl start prefect-serverMarvin
07/31/2025, 11:39 AMadd_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE' always;
add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always;
if ($request_method = 'OPTIONS') {
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE';
add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization';
add_header 'Access-Control-Max-Age' 1728000;
add_header 'Content-Type' 'text/plain; charset=utf-8';
add_header 'Content-Length' 0;
return 204;
}
}
listen 443 ssl;
ssl_certificate /etc/letsencrypt/live/prefect.happyraisins.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/prefect.happyraisins.com/privkey.pem;
include /etc/letsencrypt/options-ssl-nginx.conf;
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
}
server {
if ($host = prefect.happyraisins.com) {
return 301 https://$host$request_uri;
}
listen 80;
server_name prefect.happyraisins.com;
return 404;
}
Copy code
Enable the configuration:
```bash
sudo ln -s /etc/nginx/sites-available/prefect.happyraisins.com /etc/nginx/sites-enabled/
sudo nginx -t
sudo systemctl reload nginx Copy code
bash
/opt/.venv # Virtual environment (prefect:prefect)
/etc/prefect # Configuration files (prefect:prefect)
/var/lib/prefect # Prefect data directory (prefect:prefect)
/var/log/prefect # Log files (prefect:prefect)
/home/prefect/.prefect # Prefect user home directory (prefect:prefect) Copy code
bash
# Make sure you have curl installed
sudo apt-get install curl
# Try alternative installation method
pip install uv Copy code
bash
sudo chown -R prefect:prefect /opt/.venv
sudo chmod -R 755 /opt/.venv/lib/python3.12/site-packages/prefect/server/ui_buildPREFECT_UI_API_URL Copy code
bash
sudo chown -R prefect:prefect /var/lib/prefect
sudo chmod 755 /var/lib/prefectsudo journalctl -u prefect-server -f Copy code
bash
# Clear UV cache if needed
uv cache clean
# Reinstall with specific versions
uv pip install "prefect==3.4.10" "pydantic>=2.0.0" Copy code
bash
sudo systemctl status prefect-server Copy code
bash
curl -I <https://prefect.happyraisins.com/api/health> Copy code
bash
sudo journalctl -u prefect-server -f
sudo tail -f /var/log/nginx/error.log Copy code
<https://prefect.happyraisins.com>m
MUHAMMAD ZEESHAN
07/31/2025, 11:57 AM@Marvin
That amazng
now i want to set up my server2 first
so that i can communcation my
https://prefect.happyraisins.com/api
m
Marvin
07/31/2025, 11:57 AM✅ thought for 30.6 seconds
Marvin
07/31/2025, 11:58 AMI'll help you set up Server2 as a Prefect worker that communicates with your Server1's API. Let me create a comprehensive setup guide for Server2.
# Prefect Worker Setup Documentation (Server2)
## Table of Contents
1. #Prerequisites
2. <#python-and-virtual-environment-setup|Python and Virtual Environment Setup>
3. <#prefect-worker-installation|Prefect Worker Installation>
4. <#worker-configuration|Worker Configuration>
5. <#system-service-configuration|System Service Configuration>
6. <#testing-communication|Testing Communication>
7. <#common-issues-and-solutions|Common Issues and Solutions>
## Prerequisites
- Python 3.12.3 (matching Server1)
- Access to https://prefect.happyraisins.com/api
- Root or sudo access
## Python and Virtual Environment Setup
Copy code
bash
# Create directory for the virtual environment
sudo mkdir -p /opt/.venv
# Create virtual environment
python3.12 -m venv /opt/.venv
# Activate virtual environment
source /opt/.venv/bin/activate
# Install UV
curl -LsSf <https://astral.sh/uv/install.sh> | sh
# Add uv to your PATH if needed
export PATH="/root/.cargo/bin:$PATH" Copy code
bash
# Install Prefect using UV
source /opt/.venv/bin/activate
uv pip install prefect==3.4.10
# Verify installation
prefect version Copy code
bash
# Create prefect user
sudo useradd -r -s /bin/false prefect
# Create necessary directories
sudo mkdir -p /etc/prefect
sudo mkdir -p /var/log/prefect
sudo mkdir -p /home/prefect/.prefect
sudo mkdir -p /var/lib/prefect/flows # Directory for flow storage
# Set proper ownership
sudo chown -R prefect:prefect /etc/prefect
sudo chown -R prefect:prefect /var/log/prefect
sudo chown -R prefect:prefect /home/prefect
sudo chown -R prefect:prefect /opt/.venv
sudo chown -R prefect:prefect /var/lib/prefect Copy code
bash
sudo tee /etc/prefect/worker.env << 'EOF'
PREFECT_API_URL=<https://prefect.happyraisins.com/api>
PREFECT_HOME=/home/prefect/.prefect
PYTHONPATH=/var/lib/prefect/flows
# Add any additional environment variables your flows might need
EOF Copy code
bash
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/worker.env
WorkingDirectory=/var/lib/prefect
# Ensure the service has access to necessary directories
ReadWritePaths=/var/lib/prefect
ReadWritePaths=/opt/.venv
ReadWritePaths=/home/prefect/.prefect
ExecStart=/opt/.venv/bin/prefect worker start -p "my-process-pool" --limit 4
Restart=always
RestartSec=5
# Set environment variables
Environment=HOME=/home/prefect
Environment=PYTHONPATH=/opt/.venv/lib/python3.12/site-packages:/var/lib/prefect/flows
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
sudo systemctl daemon-reload
sudo systemctl enable prefect-worker
sudo systemctl start prefect-worker Copy code
bash
# Activate the virtual environment
source /opt/.venv/bin/activate
# Test API connection
curl -I <https://prefect.happyraisins.com/api/health>
# Configure Prefect client
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api>
# Check worker status
prefect worker ls Copy code
python
from prefect import flow, task
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
return result
if __name__ == "__main__":
test_flow.serve(name="server2-test-flow", work_pool_name="my-process-pool")Marvin
07/31/2025, 11:58 AM# You should see the flow appear in the UI at https://prefect.happyraisins.com
Copy code
## Common Issues and Solutions
### 1. Connection Issues
*Issue*: Cannot connect to Prefect API
*Solution*:
```bash
# Verify API is accessible
curl -I <https://prefect.happyraisins.com/api/health>
# Check if SSL certificates are trusted
sudo apt-get install ca-certificates Copy code
bash
sudo chown -R prefect:prefect /var/lib/prefect/flows
sudo chmod 755 /var/lib/prefect/flows Copy code
bash
# Install required packages for your flows
source /opt/.venv/bin/activate
uv pip install package-name
# Verify PYTHONPATH in worker.env includes all necessary directoriessudo journalctl -u prefect-worker -f Copy code
bash
sudo systemctl status prefect-worker Copy code
bash
sudo journalctl -u prefect-worker -f Copy code
bash
source /opt/.venv/bin/activate
prefect worker ls Copy code
bash
/var/lib/prefect/flows/
├── project1/
│ ├── flow1.py
│ └── flow2.py
├── project2/
│ └── flows/
└── requirements.txt Copy code
bash
# Install project dependencies
uv pip install -r /var/lib/prefect/flows/project1/requirements.txt Copy code
bash
# Add to your monitoring checks
curl -f <https://prefect.happyraisins.com/api/health> || alert "Prefect API is down"
systemctl is-active prefect-worker || alert "Prefect worker is down"m
MUHAMMAD ZEESHAN
07/31/2025, 12:16 PM@Marvin
]: prefect-worker.service: Main process exited, code=exited, status=203/EXEC
Jul 31 121539 ip-192-168-0-90 systemd[1]: prefect-worker.service: Failed with result 'exit-code'.
Jul 31 121544 ip-192-168-0-90 systemd[1]: prefect-worker.service: Scheduled restart job, restart counter is at 5.
Jul 31 121544 ip-192-168-0-90 systemd[1]: Stopped Prefect Worker.
Jul 31 121544 ip-192-168-0-90 systemd[1]: Started Prefect Worker.
Jul 31 121544 ip-192-168-0-90 systemd[818446]: prefect-worker.service: Failed to execute /opt/.venv/bin/prefect: Permission denied
Jul 31 121544 ip-192-168-0-90 systemd[818446]: prefect-worker.service: Failed at step EXEC spawning /opt/.venv/bin/prefect: Permission denied
lines 1-38
m
Marvin
07/31/2025, 12:18 PM✅ thought for 17.7 seconds
Marvin
07/31/2025, 12:18 PMThis error occurs because of permission issues with the prefect executable. Let's fix the permissions systematically:
1. First, let's fix the virtual environment permissions:
Copy code
bash
# Fix ownership of the entire virtual environment
sudo chown -R prefect:prefect /opt/.venv
# Make sure the prefect executable is actually executable
sudo chmod +x /opt/.venv/bin/prefect
sudo chmod +x /opt/.venv/bin/python
sudo chmod +x /opt/.venv/bin/python3 Copy code
bash
# Check if the file exists and its permissions
ls -l /opt/.venv/bin/prefect
# Try running it as the prefect user to test
sudo -u prefect /opt/.venv/bin/prefect version Copy code
bash
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/worker.env
WorkingDirectory=/var/lib/prefect
# Ensure the service has access to necessary directories
ReadWritePaths=/var/lib/prefect
ReadWritePaths=/opt/.venv
ReadWritePaths=/home/prefect/.prefect
# Use absolute paths for both Python and Prefect
ExecStart=/opt/.venv/bin/python /opt/.venv/bin/prefect worker start -p "my-process-pool" --limit 4
Restart=always
RestartSec=5
# Set environment variables
Environment=HOME=/home/prefect
Environment=PYTHONPATH=/opt/.venv/lib/python3.12/site-packages:/var/lib/prefect/flows
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
# Create and set permissions for all required directories
sudo mkdir -p /var/lib/prefect
sudo mkdir -p /home/prefect/.prefect
sudo mkdir -p /var/log/prefect
# Set ownership
sudo chown -R prefect:prefect /var/lib/prefect
sudo chown -R prefect:prefect /home/prefect/.prefect
sudo chown -R prefect:prefect /var/log/prefect
# Set directory permissions
sudo chmod 755 /var/lib/prefect
sudo chmod 755 /home/prefect/.prefect
sudo chmod 755 /var/log/prefect Copy code
bash
sudo tee /etc/prefect/worker.env << 'EOF'
PREFECT_API_URL=<https://prefect.happyraisins.com/api>
PREFECT_HOME=/home/prefect/.prefect
PYTHONPATH=/var/lib/prefect/flows:/opt/.venv/lib/python3.12/site-packages
EOF
# Set correct permissions for the env file
sudo chown prefect:prefect /etc/prefect/worker.env
sudo chmod 644 /etc/prefect/worker.env Copy code
bash
sudo systemctl daemon-reload
sudo systemctl restart prefect-worker
# Check the status and logs
sudo systemctl status prefect-worker
sudo journalctl -u prefect-worker -f Copy code
bash
# Test running the worker command as the prefect user
sudo -u prefect bash -c 'source /opt/.venv/bin/activate && prefect worker start -p "my-process-pool" --help' Copy code
bash
sudo journalctl -u prefect-worker -f Copy code
bash
ls -l /opt/.venv/bin/python* Copy code
bash
getenforce
# If it returns "Enforcing", you might need to adjust SELinux contextm
MUHAMMAD ZEESHAN
07/31/2025, 12:26 PM@Marvin
(.venv) root@ip-192-168-0-90:/opt# getenforce
Disabled
(.venv) root@ip-192-168-0-90:/opt# ls -l /opt/.venv/bin/python*
lrwxrwxrwx 1 prefect prefect 16 Jul 31 12:05 /opt/.venv/bin/python -> /usr/bin/python3
lrwxrwxrwx 1 prefect prefect 6 Jul 31 12:05 /opt/.venv/bin/python3 -> python
lrwxrwxrwx 1 prefect prefect 6 Jul 31 12:05 /opt/.venv/bin/python3.10 -> python
m
Marvin
07/31/2025, 12:26 PM✅ thought for 18.3 seconds
Marvin
07/31/2025, 12:26 PMI notice that your Python symlinks are pointing to Python 3.10, but we need Python 3.12 as that's what we're using on Server1. Let's fix this by setting up the correct Python version and recreating the virtual environment:
1. First, let's clean up the existing setup:
Copy code
bash
# Deactivate virtual environment if active
deactivate
# Remove existing virtual environment
sudo rm -rf /opt/.venv Copy code
bash
python3.12 --version
# If not installed, install Python 3.12
sudo apt update
sudo apt install python3.12 python3.12-venv Copy code
bash
# Create new virtual environment
python3.12 -m venv /opt/.venv
# Set ownership
sudo chown -R prefect:prefect /opt/.venv
# Activate the virtual environment
source /opt/.venv/bin/activate
# Verify Python version
python --version # Should show Python 3.12.x Copy code
bash
# Install UV
curl -LsSf <https://astral.sh/uv/install.sh> | sh
# Add to PATH if needed
export PATH="/root/.cargo/bin:$PATH"
# Install Prefect
uv pip install prefect==3.4.10 Copy code
bash
ls -l /opt/.venv/bin/python*
# Should show links to Python 3.12 Copy code
bash
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/worker.env
WorkingDirectory=/var/lib/prefect
# Ensure the service has access to necessary directories
ReadWritePaths=/var/lib/prefect
ReadWritePaths=/opt/.venv
ReadWritePaths=/home/prefect/.prefect
# Use absolute paths for both Python and Prefect
ExecStart=/opt/.venv/bin/python3 /opt/.venv/bin/prefect worker start -p "my-process-pool" --limit 4
Restart=always
RestartSec=5
# Set environment variables
Environment=HOME=/home/prefect
Environment=PYTHONPATH=/opt/.venv/lib/python3.12/site-packages:/var/lib/prefect/flows
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
# Set executable permissions
sudo chmod +x /opt/.venv/bin/prefect
sudo chmod +x /opt/.venv/bin/python3
sudo chmod +x /opt/.venv/bin/python
# Check permissions
ls -l /opt/.venv/bin/prefect
ls -l /opt/.venv/bin/python* Copy code
bash
sudo systemctl daemon-reload
sudo systemctl restart prefect-worker
# Check status
sudo systemctl status prefect-worker Copy code
bash
# Test as prefect user
sudo -u prefect bash -c 'source /opt/.venv/bin/activate && prefect worker start -p "my-process-pool" --help' Copy code
bash
# Configure client
source /opt/.venv/bin/activate
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api>
# List work pools
prefect work-pool lspython --versionsudo journalctl -u prefect-worker -f Copy code
bash
sudo -u prefect bash -c 'source /opt/.venv/bin/activate && PREFECT_API_URL=<https://prefect.happyraisins.com/api> prefect worker start -p "my-process-pool"'m
MUHAMMAD ZEESHAN
07/31/2025, 12:36 PM@Marvin
server 2
Jul 31 123407 ip-192-168-0-90 systemd[1]: Stopped Prefect Worker.
(.venv) root@ip-192-168-0-90:/opt# sudo journalctl -u prefect-worker -f
Jul 31 123402 ip-192-168-0-90 systemd[1]: prefect-worker.service: Main process exited, code=exited, status=203/EXEC
Jul 31 123402 ip-192-168-0-90 systemd[1]: prefect-worker.service: Failed with result 'exit-code'.
Jul 31 123407 ip-192-168-0-90 systemd[1]: prefect-worker.service: Scheduled restart job, restart counter is at 215.
Jul 31 123407 ip-192-168-0-90 systemd[1]: Stopped Prefect Worker.
Jul 31 123407 ip-192-168-0-90 systemd[1]: Started Prefect Worker.
Jul 31 123407 ip-192-168-0-90 systemd[821550]: prefect-worker.service: Failed to execute /opt/.venv/bin/python3: Permission denied
Jul 31 123407 ip-192-168-0-90 systemd[821550]: prefect-worker.service: Failed at step EXEC spawning /opt/.venv/bin/python3: Permission denied
Jul 31 123407 ip-192-168-0-90 systemd[1]: prefect-worker.service: Main process exited, code=exited, status=203/EX
-------------------
while on server 1
prefect work-pool ls
Set 'PREFECT_API_URL' to 'https://prefect.happyraisins.com/api'.
Updated profile 'local'.
Work Pools
┏━━━━━━┳━━━━━━┳━━━━┳━━━━━━━━━━━━━━━━━━━┓
┃ Name ┃ Type ┃ ID ┃ Concurrency Limit ┃
┡━━━━━━╇━━━━━━╇━━━━╇━━━━━━━━━━━━━━━━━━━┩
└──────┴──────┴────┴───────────────────┘
(**) denotes a paused pool
(.venv) root@ip-192-168-0-112:/etc/nginx/sites-available#
m
Marvin
07/31/2025, 12:36 PM✅ thought for 19.1 seconds
Marvin
07/31/2025, 12:36 PMI see two issues:
1. Permission denied for python3 on Server2
2. No work pool exists on Server1
Let's fix these issues in order:
First, on Server1, let's create the work pool:
Copy code
bash
# On Server1
source /opt/.venv/bin/activate
# Create the process work pool
prefect work-pool create "my-process-pool" --type process
# Verify it was created
prefect work-pool ls Copy code
bash
# On Server2
# Deactivate if active
deactivate
# Remove existing venv
sudo rm -rf /opt/.venv
# Create new venv with correct permissions
sudo python3.12 -m venv /opt/.venv
# Fix ownership
sudo chown -R prefect:prefect /opt/.venv
# Make sure Python is executable
sudo chmod 755 /opt/.venv/bin
sudo chmod 755 /opt/.venv/bin/python3
sudo chmod 755 /opt/.venv/bin/python
# Activate and install
source /opt/.venv/bin/activate
uv pip install prefect==3.4.10
# Verify permissions and symlinks
ls -la /opt/.venv/bin/python*
ls -la /opt/.venv/bin/prefect Copy code
bash
# On Server2
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
User=prefect
Group=prefect
EnvironmentFile=/etc/prefect/worker.env
WorkingDirectory=/var/lib/prefect
# Source the virtual environment in ExecStart
ExecStart=/bin/bash -c 'source /opt/.venv/bin/activate && prefect worker start -p "my-process-pool" --limit 4'
Restart=always
RestartSec=5
# Set environment variables
Environment=HOME=/home/prefect
Environment=PYTHONPATH=/opt/.venv/lib/python3.12/site-packages:/var/lib/prefect/flows
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
# On Server2
sudo tee /etc/prefect/worker.env << 'EOF'
PREFECT_API_URL=<https://prefect.happyraisins.com/api>
PREFECT_HOME=/home/prefect/.prefect
PYTHONPATH=/var/lib/prefect/flows:/opt/.venv/lib/python3.12/site-packages
PATH=/opt/.venv/bin:$PATH
EOF Copy code
bash
# On Server2
sudo mkdir -p /var/lib/prefect/flows
sudo mkdir -p /home/prefect/.prefect
sudo chown -R prefect:prefect /var/lib/prefect
sudo chown -R prefect:prefect /home/prefect/.prefect
sudo chmod 755 /var/lib/prefect
sudo chmod 755 /home/prefect/.prefect Copy code
bash
# On Server2
sudo systemctl daemon-reload
sudo systemctl restart prefect-worker
# Check status
sudo systemctl status prefect-worker
sudo journalctl -u prefect-worker -f Copy code
bash
# On Server2
sudo -u prefect bash -c 'source /opt/.venv/bin/activate && PREFECT_API_URL=<https://prefect.happyraisins.com/api> prefect worker start -p "my-process-pool" --limit 4' Copy code
bash
# On Server2
source /opt/.venv/bin/activate
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api>
prefect work-pool ls # Should now show the work pool we createdprefect work-pool lsm
MUHAMMAD ZEESHAN
07/31/2025, 12:42 PM@Marvin
i am running as sudo user
while also crated prefect user
sudo journalctl -u prefect-worker -f
● prefect-worker.service - Prefect Worker
Loaded: loaded (/etc/systemd/system/prefect-worker.service; enabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: exit-code) since Thu 2025-07-31 124155 UTC; 23ms ago
Process: 821702 ExecStart=/bin/bash -c source /opt/.venv/bin/activate && prefect worker start -p "my-process-pool" --limit 4 (code=exited, status=1/FAILURE)
Main PID: 821702 (code=exited, status=1/FAILURE)
CPU: 4ms
Jul 31 123407 ip-192-168-0-90 systemd[1]: Started Prefect Worker.
Jul 31 123407 ip-192-168-0-90 systemd[821550]: prefect-worker.service: Failed to execute /opt/.venv/bin/python3: Permission denied
Jul 31 123407 ip-192-168-0-90 systemd[821550]: prefect-worker.service: Failed at step EXEC spawning /opt/.venv/bin/python3: Permission denied
Jul 31 123407 ip-192-168-0-90 systemd[1]: prefect-worker.service: Main process exited, code=exited, status=203/EXEC
Jul 31 123407 ip-192-168-0-90 systemd[1]: prefect-worker.service: Failed with result 'exit-code'.
Jul 31 123407 ip-192-168-0-90 systemd[1]: Stopped Prefect Worker.
Jul 31 124154 ip-192-168-0-90 systemd[1]: Started Prefect Worker.
Jul 31 124154 ip-192-168-0-90 bash[821702]: /bin/bash: line 1: /opt/.venv/bin/activate: Permission denied
Jul 31 124155 ip-192-168-0-90 systemd[1]: prefect-worker.service: Main process exited, code=exited, status=1/FAI
m
Marvin
07/31/2025, 12:42 PM✅ thought for 18.3 seconds
Marvin
07/31/2025, 12:42 PMI see the issue. Since you're running as sudo user, let's modify the approach. We'll set up the worker service to use the full paths and proper permissions.
1. First, let's fix the permissions and ownership:
Copy code
bash
# Fix virtual environment permissions
sudo chmod -R 755 /opt/.venv
sudo chown -R root:root /opt/.venv # Since we're running as root/sudo
# Make sure specific executables are accessible
sudo chmod 755 /opt/.venv/bin/activate
sudo chmod 755 /opt/.venv/bin/python3
sudo chmod 755 /opt/.venv/bin/prefect
# Create and fix permissions for working directories
sudo mkdir -p /var/lib/prefect/flows
sudo mkdir -p /var/log/prefect
sudo chmod -R 755 /var/lib/prefect
sudo chmod -R 755 /var/log/prefect Copy code
bash
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
# Remove User and Group since we're running as root
WorkingDirectory=/var/lib/prefect
# Use full paths
ExecStart=/bin/bash -c 'source /opt/.venv/bin/activate && /opt/.venv/bin/prefect worker start -p "my-process-pool" --limit 4'
Restart=always
RestartSec=5
# Environment settings
Environment=PREFECT_API_URL=<https://prefect.happyraisins.com/api>
Environment=PREFECT_HOME=/var/lib/prefect/.prefect
Environment=PYTHONPATH=/var/lib/prefect/flows:/opt/.venv/lib/python3.12/site-packages
Environment=PATH=/opt/.venv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
sudo rm -f /etc/prefect/worker.env # Remove if exists Copy code
bash
sudo systemctl daemon-reload
sudo systemctl restart prefect-worker Copy code
bash
# Test the exact command the service will run
/bin/bash -c 'source /opt/.venv/bin/activate && /opt/.venv/bin/prefect worker start -p "my-process-pool" --limit 4' Copy code
bash
# Activate the virtual environment
source /opt/.venv/bin/activate
# Configure API URL
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api>
# List work pools
prefect work-pool ls Copy code
bash
sudo systemctl status prefect-worker
sudo journalctl -u prefect-worker -f Copy code
bash
# Check permissions of key files
ls -l /opt/.venv/bin/activate
ls -l /opt/.venv/bin/python3
ls -l /opt/.venv/bin/prefect
ls -l /opt/.venv/bin/python
# Check if bash can read the activate script
cat /opt/.venv/bin/activate
# Verify Python version and executable
/opt/.venv/bin/python3 --version Copy code
bash
source /opt/.venv/bin/activate
prefect work-pool create "my-process-pool" --type process
prefect work-pool lsm
MUHAMMAD ZEESHAN
07/31/2025, 3:11 PM@Marvin
t# /bin/bash -c 'source /opt/.venv/bin/activate && /opt/.venv/bin/prefect worker start -p "my-process-pool" --limit 4'
151114.291 | INFO | prefect - Starting temporary server on http://127.0.0.1:8485
See https://docs.prefect.io/v3/concepts/server#how-to-guides for more information on running a dedicated Prefect server.
Work pool 'my-process-pool' does not exist and no worker type was provided. Starting a process worker...
Traceback (most recent call last):
File "/opt/.venv/lib/python3.12/site-packages/prefect/cli/_utilities.py", line 44, in wrapper
return fn(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/cli/_types.py", line 156, in sync_fn
return asyncio.run(async_fn(*args, **kwargs))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/asyncio/runners.py", line 195, in run
return runner.run(main)
^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
return self._loop.run_until_complete(task)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/asyncio/base_events.py", line 691, in run_until_complete
return future.result()
^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/cli/worker.py", line 169, in start
await worker.start(
File "/opt/.venv/lib/python3.12/site-packages/prefect/workers/process.py", line 154, in start
async with self as worker:
^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/workers/process.py", line 292, in aenter
await super().__aenter__()
File "/opt/.venv/lib/python3.12/site-packages/prefect/workers/base.py", line 1547, in aenter
await self.setup()
File "/opt/.venv/lib/python3.12/site-packages/prefect/workers/base.py", line 904, in setup
raise ValueError("`PREFECT_API_URL` must be set to start a Worker.")
ValueError:
PREFECT_API_URLm
Marvin
07/31/2025, 3:11 PM✅ thought for 17.0 seconds
Marvin
07/31/2025, 3:12 PMI see the issue - the PREFECT_API_URL isn't being set properly when running the command. Let's fix this:
1. First, let's verify the work pool exists on Server1:
Copy code
bash
# On Server1
source /opt/.venv/bin/activate
prefect work-pool create "my-process-pool" --type process
prefect work-pool ls Copy code
bash
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
WorkingDirectory=/var/lib/prefect
# Set environment variables before ExecStart
Environment=PREFECT_API_URL=<https://prefect.happyraisins.com/api>
Environment=PREFECT_HOME=/var/lib/prefect/.prefect
Environment=PYTHONPATH=/var/lib/prefect/flows:/opt/.venv/lib/python3.12/site-packages
Environment=PATH=/opt/.venv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
# Modified ExecStart to include environment
ExecStart=/bin/bash -c 'source /opt/.venv/bin/activate && PREFECT_API_URL=<https://prefect.happyraisins.com/api> /opt/.venv/bin/prefect worker start -p "my-process-pool" --limit 4'
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
# On Server2
export PREFECT_API_URL=<https://prefect.happyraisins.com/api>
source /opt/.venv/bin/activate
# Test the worker
prefect worker start -p "my-process-pool" --limit 4 Copy code
bash
sudo systemctl daemon-reload
sudo systemctl restart prefect-worker
sudo systemctl status prefect-worker Copy code
bash
# On Server2
source /opt/.venv/bin/activate
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api>
# Verify the configuration
prefect config view Copy code
bash
# On Server2
curl -I <https://prefect.happyraisins.com/api/health> Copy code
bash
# On Server2
sudo tee /var/lib/prefect/flows/test_flow.py << 'EOF'
from prefect import flow, task
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
return result
if __name__ == "__main__":
test_flow.serve(name="server2-test-flow", work_pool_name="my-process-pool")
EOF
# Run the test flow
source /opt/.venv/bin/activate
python /var/lib/prefect/flows/test_flow.pyprefect work-pool lssudo journalctl -u prefect-worker -fprefect config viewcurl -I <https://prefect.happyraisins.com/api/health>m
MUHAMMAD ZEESHAN
07/31/2025, 3:15 PM@Marvin
test_flow.serve(name="server2-test-flow", work_pool_name="my-process-pool")
Traceback (most recent call last):
File "/var/lib/prefect/flows/test_flow.py", line 13, in <module>
test_flow.serve(name="server2-test-flow", work_pool_name="my-process-pool")
TypeError: Flow.serve() got an unexpected keyword argument 'work_pool_name'
m
Marvin
07/31/2025, 3:15 PM✅ thought for 15.4 seconds
Marvin
07/31/2025, 3:16 PMAh, I see the issue. The syntax has changed in Prefect 3.x. Let me correct the flow deployment code:
Copy code
python
# On Server2
sudo tee /var/lib/prefect/flows/test_flow.py << 'EOF'
from prefect import flow, task
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
return result
if __name__ == "__main__":
test_flow.deploy(
name="server2-test-flow",
work_pool_name="my-process-pool",
interval=0 # Set to 0 for manual triggers only
)
EOF Copy code
bash
# On Server1
source /opt/.venv/bin/activate
prefect work-pool ls
# If the work pool doesn't exist, create it
prefect work-pool create "my-process-pool" --type process Copy code
bash
# Activate virtual environment
source /opt/.venv/bin/activate
# Set the API URL
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api>
# Run the deployment
python /var/lib/prefect/flows/test_flow.py Copy code
bash
# List all deployments
prefect deployment ls Copy code
bash
PREFECT_API_URL=<https://prefect.happyraisins.com/api> prefect worker start -p "my-process-pool" --limit 4 Copy code
bash
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
WorkingDirectory=/var/lib/prefect
# Environment variables
Environment=PREFECT_API_URL=<https://prefect.happyraisins.com/api>
Environment=PREFECT_HOME=/var/lib/prefect/.prefect
Environment=PYTHONPATH=/var/lib/prefect/flows:/opt/.venv/lib/python3.12/site-packages
Environment=PATH=/opt/.venv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
ExecStart=/bin/bash -c 'source /opt/.venv/bin/activate && PREFECT_API_URL=<https://prefect.happyraisins.com/api> /opt/.venv/bin/prefect worker start -p "my-process-pool" --limit 4'
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
sudo systemctl daemon-reload
sudo systemctl restart prefect-workerprefect deployment lsm
MUHAMMAD ZEESHAN
07/31/2025, 3:18 PM@Marvin
(.venv) root@ip-192-168-0-90:/opt# python /var/lib/prefect/flows/test_flow.py
Traceback (most recent call last):
File "/var/lib/prefect/flows/test_flow.py", line 13, in <module>
test_flow.deploy(
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 351, in coroutine_wrapper
return run_coro_as_sync(ctx_call())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 207, in run_coro_as_sync
return call.result()
^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 365, in result
return self.future.result(timeout=timeout)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 192, in result
return self.__get_result()
^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/concurrent/futures/_base.py", line 401, in __get_result
raise self._exception
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 441, in _run_async
result = await coro
^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 188, in coroutine_wrapper
return await task
^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 341, in ctx_call
result = await async_fn(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/flows.py", line 1543, in deploy
deployment = await to_deployment_coro
^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/flows.py", line 809, in ato_deployment
return RunnerDeployment.from_flow(
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/deployments/runner.py", line 680, in from_flow
constructed_schedules = cls._construct_deployment_schedules(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/deployments/runner.py", line 608, in _construct_deployment_schedules
return [create_deployment_schedule_create(schedule)]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/deployments/schedules.py", line 23, in create_deployment_schedule_create
return DeploymentScheduleCreate(
^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/pydantic/main.py", line 253, in init
validated_self = self.__pydantic_validator__.validate_python(data, self_instance=self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.ValidationError: 4 validation errors for DeploymentScheduleCreate
schedule.function-after[validate_timezone(), IntervalSchedule]
Input should be a valid dictionary or instance of IntervalSchedule [type=model_type, input_value=None, input_type=NoneType]
For further information visit https://errors.pydantic.dev/2.11/v/model_type
schedule.CronSchedule
Input should be a valid dictionary or instance of CronSchedule [type=model_type, input_value=None, input_type=NoneType]
For further information visit https://errors.pydantic.dev/2.11/v/model_type
schedule.RRuleSchedule
Input should be a valid dictionary or instance of RRuleSchedule [type=model_type, input_value=None, input_type=NoneType]
For further information visit https://errors.pydantic.dev/2.11/v/model_type
schedule.NoSchedule
Input should be a valid dictionary or instance of NoSchedule [type=model_type, input_value=None, input_type=NoneType]
For further information visit https://errors.pydantic.dev/2.11/v/model_type
(.venv) root@ip-192-168-0-90:/opt#
m
Marvin
07/31/2025, 3:18 PM✅ thought for 15.8 seconds
Marvin
07/31/2025, 3:19 PMThe error is related to the schedule parameter in the deployment. Let's modify the flow deployment code to explicitly set the schedule to None:
Copy code
python
# On Server2
sudo tee /var/lib/prefect/flows/test_flow.py << 'EOF'
from prefect import flow, task
from prefect.deployments import DeploymentImage, Deployment
from prefect.server.schemas.schedules import NoSchedule
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
return result
if __name__ == "__main__":
test_flow.deploy(
name="server2-test-flow",
work_pool_name="my-process-pool",
schedule=NoSchedule() # Explicitly set no schedule
)
EOF Copy code
bash
# On Server2
source /opt/.venv/bin/activate
prefect work-pool ls
# If it doesn't show the work pool, create it
prefect work-pool create "my-process-pool" --type process Copy code
bash
python /var/lib/prefect/flows/test_flow.py Copy code
python
sudo tee /var/lib/prefect/flows/test_flow.py << 'EOF'
from prefect import flow, task
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
return result
if __name__ == "__main__":
deployment = test_flow.to_deployment(
name="server2-test-flow",
work_pool_name="my-process-pool"
)
deployment.apply()
EOF Copy code
bash
# Check current configuration
prefect config view
# Make sure API URL is set
prefect config set PREFECT_API_URL=https://prefect.happyraisins.com/api
# Test API connection
curl -I https://prefect.happyraisins.com/api/health Copy code
bash
# Check worker status
sudo systemctl status prefect-worker
# Check worker logs
sudo journalctl -u prefect-worker -fprefect work-pool lsprefect config view Copy code
bash
python3
>>> from prefect import flow
>>> @flow
... def test_flow():
... print("Hello from Server2!")
...
>>> deployment = test_flow.to_deployment(
... name="server2-test-flow",
... work_pool_name="my-process-pool"
... )
>>> deployment.apply()m
MUHAMMAD ZEESHAN
07/31/2025, 3:20 PM@Marvin
python /var/lib/prefect/flows/test_flow.py
Traceback (most recent call last):
File "/var/lib/prefect/flows/test_flow.py", line 2, in <module>
from prefect.deployments import DeploymentImage, Deployment
File "/opt/.venv/lib/python3.12/site-packages/prefect/deployments/__init__.py", line 23, in getattr
return getattr_migration(name)(attr_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/compatibility/migration.py", line 156, in wrapper
raise PrefectImportError(
prefect.exceptions.PrefectImportError:
prefect.deployments:Deploymentflow.serve()flow.deploy()prefect deploym
Marvin
07/31/2025, 3:20 PM✅ thought for 17.3 seconds
Marvin
07/31/2025, 3:21 PMAh, I see the issue. Let's use the correct syntax for Prefect 3.x. Here's the updated flow code:
Copy code
python
# On Server2
sudo tee /var/lib/prefect/flows/test_flow.py << 'EOF'
from prefect import flow, task
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
return result
if __name__ == "__main__":
test_flow.serve(
name="server2-test-flow",
work_pool_name="my-process-pool"
)
EOF Copy code
bash
# On Server2
source /opt/.venv/bin/activate
# Set API URL
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api>
# Check work pools
prefect work-pool ls
# If the work pool doesn't exist, create it
prefect work-pool create "my-process-pool" --type process Copy code
bash
sudo mkdir -p /var/lib/prefect/flows
sudo chown -R root:root /var/lib/prefect/flows # Since we're running as root
sudo chmod 755 /var/lib/prefect/flows Copy code
bash
python /var/lib/prefect/flows/test_flow.py Copy code
bash
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
WorkingDirectory=/var/lib/prefect
# Environment variables
Environment=PREFECT_API_URL=<https://prefect.happyraisins.com/api>
Environment=PREFECT_HOME=/var/lib/prefect/.prefect
Environment=PYTHONPATH=/var/lib/prefect/flows:/opt/.venv/lib/python3.12/site-packages
Environment=PATH=/opt/.venv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
ExecStart=/bin/bash -c 'source /opt/.venv/bin/activate && PREFECT_API_URL=<https://prefect.happyraisins.com/api> /opt/.venv/bin/prefect worker start -p "my-process-pool" --limit 4'
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
sudo systemctl daemon-reload
sudo systemctl restart prefect-worker
sudo systemctl status prefect-worker Copy code
bash
source /opt/.venv/bin/activate
export PREFECT_API_URL=<https://prefect.happyraisins.com/api>
prefect worker start -p "my-process-pool" --limit 4 Copy code
bash
# Create a deployment.yaml file
sudo tee /var/lib/prefect/flows/deployment.yaml << 'EOF'
name: server2-test-flow
entrypoint: /var/lib/prefect/flows/test_flow.py:test_flow
work_pool_name: my-process-pool
EOF
# Deploy using the CLI
prefect deploy --from /var/lib/prefect/flows/deployment.yamlprefect work-pool lsm
MUHAMMAD ZEESHAN
07/31/2025, 3:21 PM@Marvin
python /var/lib/prefect/flows/test_flow.py
Traceback (most recent call last):
File "/var/lib/prefect/flows/test_flow.py", line 13, in <module>
test_flow.serve(
TypeError: Flow.serve() got an unexpected keyword argument 'work_pool_name'
(.venv) root@ip-192-168-0-90:/opt#
m
Marvin
07/31/2025, 3:21 PM✅ thought for 13.4 seconds
Marvin
07/31/2025, 3:22 PMAh, I apologize for the confusion. In Prefect 3.x, we should use
deploy()serve() Copy code
python
# On Server2
sudo tee /var/lib/prefect/flows/test_flow.py << 'EOF'
from prefect import flow, task
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
return result
if __name__ == "__main__":
test_flow.deploy(
name="server2-test-flow",
work_pool_name="my-process-pool",
tags=["server2"]
)
EOF Copy code
bash
# On Server2
source /opt/.venv/bin/activate
# Set API URL
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api>
# List work pools
prefect work-pool ls
# If needed, create the work pool
prefect work-pool create "my-process-pool" --type process Copy code
bash
python /var/lib/prefect/flows/test_flow.py Copy code
bash
# List all deployments
prefect deployment ls Copy code
bash
export PREFECT_API_URL=<https://prefect.happyraisins.com/api>
prefect worker start -p "my-process-pool" --limit 4 Copy code
python
sudo tee /var/lib/prefect/flows/test_flow.py << 'EOF'
from prefect import flow, task
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
return result
if __name__ == "__main__":
# Simple deployment without additional options
test_flow.deploy(
name="server2-test-flow",
work_pool_name="my-process-pool"
)
EOF Copy code
bash
# Check Prefect version
prefect version
# Check configuration
prefect config view
# Test API connection
curl -I <https://prefect.happyraisins.com/api/health>prefect versionprefect work-pool lsprefect config viewm
MUHAMMAD ZEESHAN
07/31/2025, 3:23 PM@Marvin
python /var/lib/prefect/flows/test_flow.py
Traceback (most recent call last):
File "/var/lib/prefect/flows/test_flow.py", line 13, in <module>
test_flow.deploy(
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 351, in coroutine_wrapper
return run_coro_as_sync(ctx_call())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 207, in run_coro_as_sync
return call.result()
^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 365, in result
return self.future.result(timeout=timeout)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 192, in result
return self.__get_result()
^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/concurrent/futures/_base.py", line 401, in __get_result
raise self._exception
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 441, in _run_async
result = await coro
^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 188, in coroutine_wrapper
return await task
^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 341, in ctx_call
result = await async_fn(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/flows.py", line 1543, in deploy
deployment = await to_deployment_coro
^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/flows.py", line 809, in ato_deployment
return RunnerDeployment.from_flow(
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/deployments/runner.py", line 748, in from_flow
Path(flow_file).absolute().relative_to(Path.cwd().absolute())
File "/usr/lib/python3.12/pathlib.py", line 682, in relative_to
raise ValueError(f"{str(self)!r} is not in the subpath of {str(other)!r}")
ValueError: '/var/lib/prefect/flows/test_flow.py' is not in the subpath of '/opt'
(.venv) root@ip-192-168-0-90:/opt#
m
Marvin
07/31/2025, 3:23 PM✅ thought for 17.7 seconds
Marvin
07/31/2025, 3:23 PMAh, I see the issue. We need to be in the correct directory when deploying the flow. Let's modify our approach:
1. First, let's organize our flow files properly:
Copy code
bash
# Create a project directory
sudo mkdir -p /opt/prefect-projects/server2
cd /opt/prefect-projects/server2
# Create the flow file in this directory
sudo tee test_flow.py << 'EOF'
from prefect import flow, task
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
return result
if __name__ == "__main__":
test_flow.deploy(
name="server2-test-flow",
work_pool_name="my-process-pool"
)
EOF Copy code
bash
# Set ownership and permissions
sudo chown -R root:root /opt/prefect-projects
sudo chmod -R 755 /opt/prefect-projects Copy code
bash
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
WorkingDirectory=/opt/prefect-projects/server2
# Environment variables
Environment=PREFECT_API_URL=<https://prefect.happyraisins.com/api>
Environment=PREFECT_HOME=/var/lib/prefect/.prefect
Environment=PYTHONPATH=/opt/prefect-projects:/opt/.venv/lib/python3.12/site-packages
Environment=PATH=/opt/.venv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
ExecStart=/bin/bash -c 'source /opt/.venv/bin/activate && PREFECT_API_URL=<https://prefect.happyraisins.com/api> /opt/.venv/bin/prefect worker start -p "my-process-pool" --limit 4'
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
# Change to the project directory
cd /opt/prefect-projects/server2
# Activate virtual environment
source /opt/.venv/bin/activate
# Set API URL
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api>
# Deploy the flow
python test_flow.py Copy code
bash
# List work pools
prefect work-pool ls
# Create if it doesn't exist
prefect work-pool create "my-process-pool" --type process Copy code
bash
sudo systemctl daemon-reload
sudo systemctl restart prefect-worker Copy code
bash
# List deployments
prefect deployment ls Copy code
bash
# From the project directory
cd /opt/prefect-projects/server2
# Start the worker manually
export PREFECT_API_URL=<https://prefect.happyraisins.com/api>
prefect worker start -p "my-process-pool" --limit 4prefect deployment lsm
MUHAMMAD ZEESHAN
07/31/2025, 3:25 PM@Marvin
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 207, in run_coro_as_sync
return call.result()
^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 365, in result
return self.future.result(timeout=timeout)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 192, in result
return self.__get_result()
^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/concurrent/futures/_base.py", line 401, in __get_result
raise self._exception
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 441, in _run_async
result = await coro
^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 188, in coroutine_wrapper
return await task
^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 341, in ctx_call
result = await async_fn(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/flows.py", line 1561, in deploy
deployment_ids = await deploy_coro
^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 341, in ctx_call
result = await async_fn(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/deployments/runner.py", line 1184, in deploy
raise ValueError(
ValueError: Either an image or remote storage location must be provided when deploying a deployment.
(.venv) root@ip-192-168-0-90:/opt/prefect-projects/server2#
m
Marvin
07/31/2025, 3:25 PM✅ thought for 20.5 seconds
Marvin
07/31/2025, 3:26 PMAh, now I understand. In Prefect 3.x, we need to specify where the flow code will be stored. Let's modify the flow to use a local storage path:
Copy code
python
# In /opt/prefect-projects/server2/test_flow.py
sudo tee test_flow.py << 'EOF'
from prefect import flow, task
from pathlib import Path
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
return result
if __name__ == "__main__":
test_flow.deploy(
name="server2-test-flow",
work_pool_name="my-process-pool",
path=str(Path(__file__).parent), # Use the current directory as storage
entrypoint="test_flow.py:test_flow" # Specify the entrypoint
)
EOF Copy code
bash
source /opt/.venv/bin/activate
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api>
# List work pools
prefect work-pool ls
# Create if it doesn't exist
prefect work-pool create "my-process-pool" --type process Copy code
bash
sudo mkdir -p /opt/prefect-projects/server2/flows
sudo chmod -R 755 /opt/prefect-projects/server2 Copy code
python
sudo tee /opt/prefect-projects/server2/flows/test_flow.py << 'EOF'
from prefect import flow, task
import sys
from pathlib import Path
# Add the project root to Python path
project_root = str(Path(__file__).parent.parent)
if project_root not in sys.path:
sys.path.append(project_root)
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
print(f"Task result: {result}")
return result
if __name__ == "__main__":
test_flow.deploy(
name="server2-test-flow",
work_pool_name="my-process-pool",
path="/opt/prefect-projects/server2/flows", # Absolute path to flow storage
entrypoint="test_flow.py:test_flow",
version="1.0",
tags=["server2"]
)
EOF Copy code
bash
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
WorkingDirectory=/opt/prefect-projects/server2
# Environment variables
Environment=PREFECT_API_URL=<https://prefect.happyraisins.com/api>
Environment=PREFECT_HOME=/var/lib/prefect/.prefect
Environment=PYTHONPATH=/opt/prefect-projects/server2:/opt/.venv/lib/python3.12/site-packages
Environment=PATH=/opt/.venv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
ExecStart=/bin/bash -c 'source /opt/.venv/bin/activate && PREFECT_API_URL=<https://prefect.happyraisins.com/api> /opt/.venv/bin/prefect worker start -p "my-process-pool" --limit 4'
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
cd /opt/prefect-projects/server2/flows
source /opt/.venv/bin/activate
python test_flow.py Copy code
bash
# Restart the service
sudo systemctl daemon-reload
sudo systemctl restart prefect-worker
# Or test manually
prefect worker start -p "my-process-pool" --limit 4 Copy code
bash
# List deployments
prefect deployment ls
# List workers
prefect worker lsprefect deployment lsm
MUHAMMAD ZEESHAN
07/31/2025, 3:28 PM@Marvin
activate
python test_flow.py
Traceback (most recent call last):
File "/opt/prefect-projects/server2/flows/test_flow.py", line 21, in <module>
test_flow.deploy(
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 351, in coroutine_wrapper
return run_coro_as_sync(ctx_call())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 207, in run_coro_as_sync
return call.result()
^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 365, in result
return self.future.result(timeout=timeout)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 192, in result
return self.__get_result()
^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/concurrent/futures/_base.py", line 401, in __get_result
raise self._exception
File "/opt/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 441, in _run_async
result = await coro
^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 188, in coroutine_wrapper
return await task
^^^^^^^^^^
File "/opt/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 341, in ctx_call
result = await async_fn(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: Flow.deploy() got an unexpected keyword argument 'path'
m
Marvin
07/31/2025, 3:28 PM✅ thought for 16.7 seconds
Marvin
07/31/2025, 3:28 PMI apologize for the confusion. Let's use the correct syntax for Prefect 3.x. We'll use
from_source Copy code
python
# In /opt/prefect-projects/server2/flows/test_flow.py
sudo tee /opt/prefect-projects/server2/flows/test_flow.py << 'EOF'
from prefect import flow, task
@task
def my_task():
return "Hello from Server2!"
@flow
def test_flow():
result = my_task()
print(f"Task result: {result}")
return result
if __name__ == "__main__":
test_flow.from_source(
source="/opt/prefect-projects/server2/flows",
entrypoint="test_flow.py:test_flow"
).deploy(
name="server2-test-flow",
work_pool_name="my-process-pool",
tags=["server2"]
)
EOF Copy code
bash
source /opt/.venv/bin/activate
prefect config set PREFECT_API_URL=<https://prefect.happyraisins.com/api>
# Create work pool if it doesn't exist
prefect work-pool create "my-process-pool" --type process Copy code
bash
# Create directories if they don't exist
sudo mkdir -p /opt/prefect-projects/server2/flows
sudo chmod -R 755 /opt/prefect-projects/server2 Copy code
bash
cd /opt/prefect-projects/server2/flows
source /opt/.venv/bin/activate
python test_flow.py Copy code
bash
sudo tee /etc/systemd/system/prefect-worker.service << 'EOF'
[Unit]
Description=Prefect Worker
After=network.target
[Service]
Type=simple
WorkingDirectory=/opt/prefect-projects/server2/flows
# Environment variables
Environment=PREFECT_API_URL=<https://prefect.happyraisins.com/api>
Environment=PREFECT_HOME=/var/lib/prefect/.prefect
Environment=PYTHONPATH=/opt/prefect-projects/server2:/opt/.venv/lib/python3.12/site-packages
Environment=PATH=/opt/.venv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
ExecStart=/bin/bash -c 'source /opt/.venv/bin/activate && prefect worker start -p "my-process-pool" --limit 4'
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
sudo systemctl daemon-reload
sudo systemctl restart prefect-worker Copy code
bash
# List deployments
prefect deployment ls
# List workers
prefect worker ls Copy code
bash
source /opt/.venv/bin/activate
export PREFECT_API_URL=<https://prefect.happyraisins.com/api>
prefect worker start -p "my-process-pool" --limit 4prefect deployment lsm
MUHAMMAD ZEESHAN
07/31/2025, 3:38 PM@Marvin
i want to use postgresql in server 1 in place of sqlite
m
Marvin
07/31/2025, 3:38 PM✅ thought for 25.0 seconds
Marvin
07/31/2025, 3:39 PMI'll help you set up PostgreSQL for Prefect on Server1. Let's do this step by step:
1. First, install PostgreSQL:
Copy code
bash
# Install PostgreSQL
sudo apt update
sudo apt install postgresql postgresql-contrib
# Verify installation
sudo systemctl status postgresql Copy code
bash
# Switch to postgres user
sudo -u postgres psql
# In PostgreSQL prompt, create database and user
CREATE DATABASE prefect;
CREATE USER prefect WITH PASSWORD 'your_secure_password';
GRANT ALL PRIVILEGES ON DATABASE prefect TO prefect;
ALTER DATABASE prefect OWNER TO prefect;
# Connect to the prefect database
\c prefect
# Grant schema permissions
GRANT ALL ON SCHEMA public TO prefect;
# Exit PostgreSQL prompt
\q Copy code
bash
# Activate your virtual environment
source /opt/.venv/bin/activate
# Install psycopg2
uv pip install "psycopg[binary]" Copy code
bash
sudo tee /etc/prefect/server.env << 'EOF'
PREFECT_SERVER_API_HOST=127.0.0.1
PREFECT_SERVER_API_PORT=4200
PREFECT_UI_API_URL=<https://prefect.happyraisins.com/api>
PREFECT_SERVER_DATABASE_CONNECTION_URL=<postgresql+psycopg://prefect:your_secure_password@localhost:5432/prefect>
EOF Copy code
bash
sudo tee /etc/systemd/system/prefect-server.service << 'EOF'
[Unit]
Description=Prefect Server
After=network.target postgresql.service
Requires=postgresql.service
[Service]
Type=simple
WorkingDirectory=/var/lib/prefect
# Environment variables
EnvironmentFile=/etc/prefect/server.env
Environment=HOME=/home/prefect
Environment=PYTHONPATH=/opt/.venv/lib/python3.12/site-packages
# Ensure the service has access to necessary directories
ReadWritePaths=/var/lib/prefect
ReadWritePaths=/opt/.venv
ReadWritePaths=/home/prefect/.prefect
ExecStart=/bin/bash -c 'source /opt/.venv/bin/activate && prefect server start'
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF Copy code
bash
# Create directories if they don't exist
sudo mkdir -p /var/lib/prefect
sudo mkdir -p /home/prefect/.prefect
# Set permissions
sudo chown -R prefect:prefect /var/lib/prefect
sudo chown -R prefect:prefect /home/prefect/.prefect Copy code
bash
sudo systemctl daemon-reload
sudo systemctl restart prefect-server
# Check the status
sudo systemctl status prefect-server
# Check logs for any issues
sudo journalctl -u prefect-server -f Copy code
bash
# Check if PostgreSQL is running
sudo systemctl status postgresql
# Check PostgreSQL logs if needed
sudo tail -f /var/log/postgresql/postgresql-*.log Copy code
bash
source /opt/.venv/bin/activate
python3 << 'EOF'
import psycopg
try:
conn = psycopg.connect("dbname=prefect user=prefect password=your_secure_password host=localhost")
print("Database connection successful!")
conn.close()
except Exception as e:
print(f"Error connecting to database: {e}")
EOF Copy code
bash
# Find your SQLite database
sudo find /var/lib/prefect -name "*.db"
# Create a backup
sudo cp /var/lib/prefect/prefect.db /var/lib/prefect/prefect.db.backup Copy code
bash
sudo nano /etc/postgresql/*/main/postgresql.conf Copy code
listen_addresses = 'localhost' # Only allow local connections Copy code
bash
sudo nano /etc/postgresql/*/main/pg_hba.confMarvin
07/31/2025, 3:39 PMhost all all ::1/128 scram-sha-256
Copy code
3. Restart PostgreSQL to apply security settings:
```bash
sudo systemctl restart postgresql Copy code
bash
sudo systemctl status prefect-server Copy code
bash
source /opt/.venv/bin/activate
prefect server database reset --confirmm
MUHAMMAD ZEESHAN
07/31/2025, 3:43 PM@Marvin
zeeshan@ip-192-168-0-112:/opt$ uv pip install "psycopg[binary]"
Resolved 3 packages in 12ms
error: Failed to install: psycopg-3.2.9-py3-none-any.whl (psycopg==3.2.9)
Caused by: failed to create directory `/opt/.venv/lib/python3.12/site-packages/psycopg-3.2.9.dist-info`: Permission denied (os error 13)
(.venv) zeeshan@ip-192-168-0-112:/opt$
m
Marvin
07/31/2025, 3:43 PM✅ thought for 16.3 seconds
Marvin
07/31/2025, 3:44 PMThis error occurs because we're trying to install packages without proper permissions. Let's fix this:
1. First, deactivate the virtual environment:
Copy code
bash
deactivate Copy code
bash
# If you're using sudo
sudo chown -R $USER:$USER /opt/.venv
# Or if you want to keep it as root
sudo su Copy code
bash
# Activate virtual environment
source /opt/.venv/bin/activate
# Install PostgreSQL dependencies
uv pip install "psycopg[binary]" Copy code
bash
# Remove existing virtual environment
sudo rm -rf /opt/.venv
# Create new virtual environment
sudo python3.12 -m venv /opt/.venv
# Fix ownership
sudo chown -R $USER:$USER /opt/.venv
# Activate and install packages
source /opt/.venv/bin/activate
uv pip install prefect==3.4.10
uv pip install "psycopg[binary]" Copy code
bash
# Switch to root
sudo su
# Create new virtual environment
python3.12 -m venv /opt/.venv
# Activate and install
source /opt/.venv/bin/activate
uv pip install prefect==3.4.10
uv pip install "psycopg[binary]" Copy code
bash
# Install PostgreSQL
sudo apt update
sudo apt install postgresql postgresql-contrib
# Start PostgreSQL
sudo systemctl start postgresql
sudo systemctl enable postgresql
# Switch to postgres user to create database
sudo -u postgres psql -c "CREATE DATABASE prefect;"
sudo -u postgres psql -c "CREATE USER prefect WITH PASSWORD 'your_secure_password';"
sudo -u postgres psql -c "GRANT ALL PRIVILEGES ON DATABASE prefect TO prefect;"
sudo -u postgres psql -c "ALTER DATABASE prefect OWNER TO prefect;"
# Connect to the prefect database and grant schema permissions
sudo -u postgres psql -d prefect -c "GRANT ALL ON SCHEMA public TO prefect;" Copy code
bash
# Update server environment file
sudo tee /etc/prefect/server.env << 'EOF'
PREFECT_SERVER_API_HOST=127.0.0.1
PREFECT_SERVER_API_PORT=4200
PREFECT_UI_API_URL=<https://prefect.happyraisins.com/api>
PREFECT_SERVER_DATABASE_CONNECTION_URL=<postgresql+psycopg://prefect:your_secure_password@localhost:5432/prefect>
EOF
# Restart Prefect server
sudo systemctl restart prefect-server
# Check status
sudo systemctl status prefect-server
sudo journalctl -u prefect-server -fm
MUHAMMAD ZEESHAN
07/31/2025, 3:50 PM@Marvin
File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/langhelpers.py", line 224, in exit
Jul 31 155023 ip-192-168-0-112 prefect[5755]: raise exc_value.with_traceback(exc_tb)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/impl.py", line 175, in _do_get
Jul 31 155023 ip-192-168-0-112 prefect[5755]: return self._create_connection()
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 388, in _create_connection
Jul 31 155023 ip-192-168-0-112 prefect[5755]: return _ConnectionRecord(self)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 673, in init
Jul 31 155023 ip-192-168-0-112 prefect[5755]: self.__connect()
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 899, in __connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: with util.safe_reraise():
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/langhelpers.py", line 224, in exit
Jul 31 155023 ip-192-168-0-112 prefect[5755]: raise exc_value.with_traceback(exc_tb)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 895, in __connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: self.dbapi_connection = connection = pool._invoke_creator(self)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/engine/create.py", line 646, in connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: return dialect.connect(*cargs, **cparams)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/engine/default.py", line 626, in connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: return self.loaded_dbapi.connect(*cargs, **cparams) # type: ignore[no-any-return] # NOQA: E501
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/dialects/postgresql/psycopg.py", line 733, in connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: await_only(creator_fn(*arg, **kw))
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/_concurrency_py3k.py", line 132, in await_only
Jul 31 155023 ip-192-168-0-112 prefect[5755]: return current.parent.switch(awaitable) # type: ignore[no-any-return,attr-defined] # noqa: E501
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/_concurrency_py3k.py", line 196, in greenlet_spawn
Jul 31 155023 ip-192-168-0-112 prefect[5755]: value = await result
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/psycopg/connection_async.py", line 136, in connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: raise last_ex.with_traceback(None)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: sqlalchemy.exc.ProgrammingError: (psycopg.ProgrammingError) invalid connection option "command_timeout"
Jul 31 155023 ip-192-168-0-112 prefect[5755]: (Background on this error at: https://sqlalche.me/e/20/f405)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ERROR: Application startup failed. Exiting.
Jul 31 155023 ip-192-168-0-112 prefect[5755]: Server stopped!
Jul 31 155024 ip-192-168-0-112 systemd[1]: prefect-server.service: Main process exited, code=exited, status=3/NOTIMPLEMENTED
Jul 31 155024 ip-192-168-0-112 systemd[1]: prefect-server.service: Failed with result 'exit-code'.
Jul 31 155024 ip-192-168-0-112 systemd[1]: prefect-server.service: Consumed 8.092s CPU time.
Jul 31 155029 ip-192-168-0-112 systemd[1]: prefect-server.service: Scheduled restart job, restart counter is at 5.
Jul 31 155029 ip-192-168-0-112 systemd[1]: Started prefect-server.service - Prefect Server.
Jul 31 155034 ip-192-168-0-112 prefect[5762]: _ _ _ _ _ _ _____
Jul 31 155034 ip-192-168-0-112 prefect[5762]: | _ \ _ \ __| __| __/ _| _|
Jul 31 155034 ip-192-168-0-112 prefect[5762]: | _/ / _|| _|| | (_ | |
Jul 31 155034 ip-192-168-0-112 prefect[5762]: |_| |_|_\___|_| |___\___| |_|
Jul 31 155034 ip-192-168-0-112 prefect[5762]: Configure Prefect to communicate with the server with:
Jul 31 155034 ip-192-168-0-112 prefect[5762]: prefect config set PREFECT_API_URL=http://127.0.0.1:4200/api
Jul 31 155034 ip-192-168-0-112 prefect[5762]: View the API reference documentation at http://127.0.0.1:4200/docs
Jul 31 155034 ip-192-168-0-112 prefect[5762]: Check out the dashboard at http://127.0.0.1:4200
Jul 31 155036 ip-192-168-0-112 prefect[5762]: ERROR: Traceback (most recent call last):
Jul 31 155036 ip-192-168-0-112 prefect[5762]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/engine/base.py", line 143, in init
Jul 31 155036 ip-192-168-0-112 prefect[5762]: self._dbapi_connection = engine.raw_connection()
Jul 31 155036 ip-192-168-0-112 prefect[5762]: ^^^^^^^^^^^^^^^^^^^^^^^
m
Marvin
07/31/2025, 3:51 PMYour message was too long, here's your message at the allowed limit:
File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/langhelpers py line 224 in exit Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] raise exc_value with_traceback(exc_tb) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/impl py line 175 in _do_get Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] return self _create_connection() Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 388 in _create_connection Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] return _ConnectionRecord(self) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 673 in init Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] self __connect() Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 899 in __connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] with util safe_reraise() Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/langhelpers py line 224 in exit Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] raise exc_value with_traceback(exc_tb) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 895 in __connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] self dbapi_connection = connection = pool _invoke_creator(self) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/engine/create py line 646 in connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] return dialect connect(*cargs *cparams) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/engine/default py line 626 in connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] return self loaded_dbapi connect(*cargs *cparams) # type ignore[no-any-return] # NOQA E501 Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/dialects/postgresql/psycopg py line 733 in connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] await_only(creator_fn(*arg **kw)) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/_concurrency_py3k py line 132 in await_only Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] return current parent switch(awaitable) # type ignore[no-any-return attr-defined] # noqa E501 Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/_concurrency_py3k py line 196 in greenlet_spawn Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] value = await result Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/psycopg/connection_async py line 136 in connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] raise last_ex with_traceback(None) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] sqlalchemy exc ProgrammingError (psycopg ProgrammingError) invalid connection option command_timeout Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] (Background on this error at <https //sqlalche me/e/20/f405>) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ERROR Application startup failed Exiting Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] Server stoppe
Marvin
07/31/2025, 3:51 PMd! Jul 31 15 50 24 ip-192-168-0-112 systemd[1] prefect-server service Main process exited code=exited status=3/NOTIMPLEMENTED Jul 31 15 50 24 ip-192-168-0-112 systemd[1] prefect-server service Failed with result 'exit-code' Jul 31 15 50 24 ip-192-168-0-112 systemd[1] prefect-server service Consumed 8 092s CPU time Jul
m
MUHAMMAD ZEESHAN
07/31/2025, 3:52 PM@Marvin
File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/langhelpers.py", line 224, in exit
Jul 31 155023 ip-192-168-0-112 prefect[5755]: raise exc_value.with_traceback(exc_tb)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/impl.py", line 175, in _do_get
Jul 31 155023 ip-192-168-0-112 prefect[5755]: return self._create_connection()
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 388, in _create_connection
Jul 31 155023 ip-192-168-0-112 prefect[5755]: return _ConnectionRecord(self)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 673, in init
Jul 31 155023 ip-192-168-0-112 prefect[5755]: self.__connect()
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 899, in __connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: with util.safe_reraise():
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/langhelpers.py", line 224, in exit
Jul 31 155023 ip-192-168-0-112 prefect[5755]: raise exc_value.with_traceback(exc_tb)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 895, in __connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: self.dbapi_connection = connection = pool._invoke_creator(self)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/engine/create.py", line 646, in connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: return dialect.connect(*cargs, **cparams)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/engine/default.py", line 626, in connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: return self.loaded_dbapi.connect(*cargs, **cparams) # type: ignore[no-any-return] # NOQA: E501
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/dialects/postgresql/psycopg.py", line 733, in connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: await_only(creator_fn(*arg, **kw))
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/_concurrency_py3k.py", line 132, in await_only
Jul 31 155023 ip-192-168-0-112 prefect[5755]: return current.parent.switch(awaitable) # type: ignore[no-any-return,attr-defined] # noqa: E501
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/_concurrency_py3k.py", line 196, in greenlet_spawn
Jul 31 155023 ip-192-168-0-112 prefect[5755]: value = await result
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ^^^^^^^^^^^^
Jul 31 155023 ip-192-168-0-112 prefect[5755]: File "/opt/.venv/lib/python3.12/site-packages/psycopg/connection_async.py", line 136, in connect
Jul 31 155023 ip-192-168-0-112 prefect[5755]: raise last_ex.with_traceback(None)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: sqlalchemy.exc.ProgrammingError: (psycopg.ProgrammingError) invalid connection option "command_timeout"
Jul 31 155023 ip-192-168-0-112 prefect[5755]: (Background on this error at: https://sqlalche.me/e/20/f405)
Jul 31 155023 ip-192-168-0-112 prefect[5755]: ERROR: Application startup failed. Exiting.
Jul 31 155023 ip-192-168-0-112 prefect[5755]: Server stopped!
Jul 31 155024 ip-192-168-0-112 systemd[1]: prefect-server.service: Main process exited, code=exited, status=3/NOTIMPLEMENTED
Jul 31 155024 ip-192-168-0-112 systemd[1]: prefect-server.service: Failed with result 'exit-code'.
Jul 31 155024 ip-192-168-0-112 systemd[1]: prefect-server.service: Consumed 8.092s CPU time.
Jul 31 155029 ip-192-168-0-112 systemd[1]: prefect-server.service: Scheduled restart job, restart counter is at 5.
Jul 31 155029 ip-192-168-0-112 systemd[1]: Started prefect-server.service - Prefect Server.
Jul 31 155034 ip-192-168-0-112 prefect[5762]: _ _ _ _ _ _ _____
Jul 31 155034 ip-192-168-0-112 prefect[5762]: | _ \ _ \ __| __| __/ _| _|
Jul 31 155034 ip-192-168-0-112 prefect[5762]: | _/ / _|| _|| | (_ | |
Jul 31 155034 ip-192-168-0-112 prefect[5762]: |_| |_|_\___|_| |___\___| |_|
Jul 31 155034 ip-192-168-0-112 prefect[5762]: Configure Prefect to communicate with the server with:
m
Marvin
07/31/2025, 3:52 PMYour message was too long, here's your message at the allowed limit:
File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/langhelpers py line 224 in exit Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] raise exc_value with_traceback(exc_tb) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/impl py line 175 in _do_get Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] return self _create_connection() Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 388 in _create_connection Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] return _ConnectionRecord(self) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 673 in init Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] self __connect() Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 899 in __connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] with util safe_reraise() Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/langhelpers py line 224 in exit Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] raise exc_value with_traceback(exc_tb) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 895 in __connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] self dbapi_connection = connection = pool _invoke_creator(self) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/engine/create py line 646 in connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] return dialect connect(*cargs *cparams) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/engine/default py line 626 in connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] return self loaded_dbapi connect(*cargs *cparams) # type ignore[no-any-return] # NOQA E501 Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/dialects/postgresql/psycopg py line 733 in connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] await_only(creator_fn(*arg **kw)) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/_concurrency_py3k py line 132 in await_only Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] return current parent switch(awaitable) # type ignore[no-any-return attr-defined] # noqa E501 Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/_concurrency_py3k py line 196 in greenlet_spawn Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] value = await result Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ^^^^^^^^^^^^ Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] File /opt/ venv/lib/python3 12/site-packages/psycopg/connection_async py line 136 in connect Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] raise last_ex with_traceback(None) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] sqlalchemy exc ProgrammingError (psycopg ProgrammingError) invalid connection option command_timeout Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] (Background on this error at <https //sqlalche me/e/20/f405>) Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] ERROR Application startup failed Exiting Jul 31 15 50 23 ip-192-168-0-112 prefect[5755] Server stoppe
Marvin
07/31/2025, 3:52 PMd! Jul 31 15 50 24 ip-192-168-0-112 systemd[1] prefect-server service Main process exited code=exited status=3/NOTIMPLEMENTED Jul 31 15 50 24 ip-192-168-0-112 systemd[1] prefect-server service Failed with result 'exit-code' Jul 31 15 50 24 ip-192-168-0-112 systemd[1] prefect-server service Consumed 8 092s CPU time Jul
m
MUHAMMAD ZEESHAN
07/31/2025, 3:53 PM@Marvin
: with util.safe_reraise():
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/langhelpers.py", line 224, in exit
Jul 31 155231 ip-192-168-0-112 prefect[5826]: raise exc_value.with_traceback(exc_tb)
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/impl.py", line 175, in _do_get
Jul 31 155231 ip-192-168-0-112 prefect[5826]: return self._create_connection()
Jul 31 155231 ip-192-168-0-112 prefect[5826]: ^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 388, in _create_connection
Jul 31 155231 ip-192-168-0-112 prefect[5826]: return _ConnectionRecord(self)
Jul 31 155231 ip-192-168-0-112 prefect[5826]: ^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 673, in init
Jul 31 155231 ip-192-168-0-112 prefect[5826]: self.__connect()
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 899, in __connect
Jul 31 155231 ip-192-168-0-112 prefect[5826]: with util.safe_reraise():
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/langhelpers.py", line 224, in exit
Jul 31 155231 ip-192-168-0-112 prefect[5826]: raise exc_value.with_traceback(exc_tb)
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/pool/base.py", line 895, in __connect
Jul 31 155231 ip-192-168-0-112 prefect[5826]: self.dbapi_connection = connection = pool._invoke_creator(self)
Jul 31 155231 ip-192-168-0-112 prefect[5826]: ^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/engine/create.py", line 646, in connect
Jul 31 155231 ip-192-168-0-112 prefect[5826]: return dialect.connect(*cargs, **cparams)
Jul 31 155231 ip-192-168-0-112 prefect[5826]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/engine/default.py", line 626, in connect
Jul 31 155231 ip-192-168-0-112 prefect[5826]: return self.loaded_dbapi.connect(*cargs, **cparams) # type: ignore[no-any-return] # NOQA: E501
Jul 31 155231 ip-192-168-0-112 prefect[5826]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/dialects/postgresql/psycopg.py", line 733, in connect
Jul 31 155231 ip-192-168-0-112 prefect[5826]: await_only(creator_fn(*arg, **kw))
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/_concurrency_py3k.py", line 132, in await_only
Jul 31 155231 ip-192-168-0-112 prefect[5826]: return current.parent.switch(awaitable) # type: ignore[no-any-return,attr-defined] # noqa: E501
Jul 31 155231 ip-192-168-0-112 prefect[5826]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/sqlalchemy/util/_concurrency_py3k.py", line 196, in greenlet_spawn
Jul 31 155231 ip-192-168-0-112 prefect[5826]: value = await result
Jul 31 155231 ip-192-168-0-112 prefect[5826]: ^^^^^^^^^^^^
Jul 31 155231 ip-192-168-0-112 prefect[5826]: File "/opt/.venv/lib/python3.12/site-packages/psycopg/connection_async.py", line 136, in connect
Jul 31 155231 ip-192-168-0-112 prefect[5826]: raise last_ex.with_traceback(None)
Jul 31 155231 ip-192-168-0-112 prefect[5826]: sqlalchemy.exc.ProgrammingError: (psycopg.ProgrammingError) invalid connection option "command_timeout"
Jul 31 155231 ip-192-168-0-112 prefect[5826]: (Background on this error at: https://sqlalche.me/e/20/f405)
Jul 31 155231 ip-192-168-0-112 prefect[5826]: ERROR: Application startup failed. Exiting.
Jul 31 155231 ip-192-168-0-112 prefect[5826]: Server stopped!
Jul 31 155232 ip-192-168-0-112 systemd[1]: prefect-server.service: Main process exited, code=exited, status=3/NOTIMPLEMENTED
Jul 31 155232 ip-192-168-0-112 systemd[1]: prefect-server.service: Failed with result 'exit-code'.
Jul 31 155232 ip-192-168-0-112 systemd[1]: prefect-server.service: Consumed 7.648s CPU time.
Jul 31 155237 ip-192-168-0-112 systemd[1]: prefect-server.service: Scheduled restart job, restart counter is at 15.
Jul 31 155237 ip-192-168-0-112 systemd[1]: Started prefect-server.service - Prefect Server.
m
Marvin
07/31/2025, 3:53 PMYour message was too long, here's your message at the allowed limit:
with util safe_reraise() Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/langhelpers py line 224 in exit Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] raise exc_value with_traceback(exc_tb) Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/impl py line 175 in _do_get Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] return self _create_connection() Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] ^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 388 in _create_connection Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] return _ConnectionRecord(self) Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] ^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 673 in init Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] self __connect() Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 899 in __connect Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] with util safe_reraise() Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/langhelpers py line 224 in exit Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] raise exc_value with_traceback(exc_tb) Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/pool/base py line 895 in __connect Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] self dbapi_connection = connection = pool _invoke_creator(self) Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] ^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/engine/create py line 646 in connect Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] return dialect connect(*cargs *cparams) Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/engine/default py line 626 in connect Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] return self loaded_dbapi connect(*cargs *cparams) # type ignore[no-any-return] # NOQA E501 Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/dialects/postgresql/psycopg py line 733 in connect Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] await_only(creator_fn(*arg **kw)) Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/_concurrency_py3k py line 132 in await_only Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] return current parent switch(awaitable) # type ignore[no-any-return attr-defined] # noqa E501 Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/sqlalchemy/util/_concurrency_py3k py line 196 in greenlet_spawn Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] value = await result Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] ^^^^^^^^^^^^ Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] File /opt/ venv/lib/python3 12/site-packages/psycopg/connection_async py line 136 in connect Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] raise last_ex with_traceback(None) Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] sqlalchemy exc ProgrammingError (psycopg ProgrammingError) invalid connection option command_timeout Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] (Background on this error at <https //sqlalche me/e/20/f405>) Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] ERROR Application startup fa
Marvin
07/31/2025, 3:53 PMiled Exiting Jul 31 15 52 31 ip-192-168-0-112 prefect[5826] Server stopped! Jul 31 15 52 32 ip-192-168-0-112 systemd[1] prefect-server service Main process exited code=exited status=3/NOTIMPLEMENTED Jul 31 15 52 32 ip-192-168-0-112 systemd[1] prefect-server service Failed with result 'exit-code' Jul 31 15 52