shlok
07/01/2025, 8:57 PMMarvin
07/01/2025, 8:57 PMMarvin
07/01/2025, 8:58 PMbash
docker run -p 4200:4200 prefecthq/prefect:2-latest prefect server start --host 0.0.0.0
2. Client Configuration
On your Windows machine, you need to set the API URL to point to your Docker server:
bash
prefect config set PREFECT_API_URL="<http://localhost:4200/api>"
If your Docker is running on a different machine, replace localhost
with the appropriate IP address or hostname.
3. Verify Connection
You can verify the connection by running:
bash
prefect server health-check
4. Check Work Pool Visibility
Once connected, verify you can see the work pools:
bash
prefect work-pool ls
If you're still not seeing the work pool after these steps, there are a few additional things to check:
- Ensure your Docker container is running (docker ps
)
- Check if you can access the Prefect UI through your browser
- Verify there are no firewalls blocking the connection
- Make sure you're using the same Prefect profile that's configured with the correct API URL
Would you like me to help troubleshoot any specific part of this setup? It would be helpful to know:
1. Can you access the Prefect UI from your Windows machine?
2. What's the output when you run prefect config view
?shlok
07/01/2025, 9:02 PMMarvin
07/01/2025, 9:02 PMMarvin
07/01/2025, 9:03 PMbash
prefect profile ls
This will show all available profiles and which one is active.
2. Set up a proper profile for your Docker server:
bash
# Create a new profile (if needed)
prefect profile create docker-server
# Switch to it
prefect profile use docker-server
# Set the API URL
prefect config set PREFECT_API_URL="<http://localhost:4200/api>"
3. Verify the configuration:
bash
prefect config view
Make sure the PREFECT_API_URL is correctly pointing to your Docker server.
4. Test the connection:
bash
prefect server health-check
If you're still not seeing the work pools after these steps, let's try to diagnose further:
1. Can you access the Prefect UI in your browser at <http://localhost:4200>
?
2. When you look at the work pool in the UI, is it definitely created and active?
3. Try creating a new work pool from the command line to test:
bash
prefect work-pool create test-pool
The fact that you switched profiles but still don't see the work pools suggests either:
- The API URL isn't correctly configured in your current profile
- There's a connection issue between your Windows machine and the Docker container
- The work pools might not have been created properly in the UI
Could you share:
1. The output of prefect config view
after following these steps?
2. Whether you can access the Prefect UI in your browser?
3. Whether the work pool you created in the UI is visible there?
This will help me provide more targeted assistance.shlok
07/01/2025, 9:04 PMMarvin
07/01/2025, 9:05 PMMarvin
07/01/2025, 9:06 PMPREFECT_API_URL
setting isn't persisting in your profile. Let's fix this step by step:
1. First, stop any running Prefect processes (including your Docker container)
2. Restart your Docker container with explicit port mapping:
bash
docker run -d -p 4200:4200 prefecthq/prefect:2-latest prefect server start --host 0.0.0.0
3. Set up your profile properly (run these commands in your Windows terminal):
bash
# Create a fresh profile
prefect profile create docker-profile
# Switch to it
prefect profile use docker-profile
# Set the API URL - this is crucial
prefect config set PREFECT_API_URL="<http://localhost:4200/api>"
4. Verify the configuration stuck by running:
bash
prefect config view
You should see PREFECT_API_URL="<http://localhost:4200/api>"
in the output.
5. Test the connection:
bash
prefect server health-check
This should NOT start a temporary server but instead connect to your Docker instance.
If you're still seeing a temporary server start up, there might be an issue with:
- Your Docker container not running
- The port not being properly exposed
- A firewall blocking the connection
To troubleshoot:
1. Can you verify your Docker container is running?
bash
docker ps
You should see the Prefect container running and port 4200 mapped.
2. Try accessing the Prefect UI in your browser:
- Go to <http://localhost:4200>
- If this doesn't work, there's likely an issue with your Docker container or port mapping
Let me know what happens after following these steps, particularly:
1. What does docker ps
show?
2. Can you access the UI in your browser?
3. What's the exact output of prefect config view
?
This will help us pinpoint exactly where the configuration is breaking down.shlok
07/01/2025, 9:11 PMMarvin
07/01/2025, 9:11 PMMarvin
07/01/2025, 9:12 PMbash
docker stop $(docker ps -q --filter ancestor=prefecthq/prefect:2-latest)
2. Start the Prefect server with proper network configuration:
bash
docker run -d --name prefect-server \
-p 4200:4200 \
--network bridge \
prefecthq/prefect:2-latest \
prefect server start --host 0.0.0.0 --port 4200
3. Verify the container is running and port is mapped:
bash
docker ps
You should see the container running with port mapping 4200:4200
4. Check the container logs for any errors:
bash
docker logs prefect-server
Look for any error messages or confirmation that the server started successfully
5. On your Windows machine, try these URLs in your browser:
- <http://localhost:4200>
- If that doesn't work, try <http://127.0.0.1:4200>
6. Configure your local Prefect client:
bash
prefect profile create docker-profile
prefect profile use docker-profile
prefect config set PREFECT_API_URL="<http://localhost:4200/api>"
If you still can't access the server, let's try some troubleshooting:
1. Check if the port is actually listening:
bash
docker exec prefect-server netstat -tulpn | grep 4200
2. Verify Docker networking:
bash
docker network ls
3. Test if the container can be reached:
bash
curl <http://localhost:4200>
Additional considerations:
- Are you using Docker Desktop for Windows?
- Do you have any antivirus or firewall software that might be blocking the connection?
- Are you running Docker through WSL2 or the legacy Hyper-V backend?
Could you tell me:
1. What version of Docker are you using?
2. What happens when you try to access <http://localhost:4200>
in your browser - do you get an error message?
3. What's the output of docker ps
after starting the container with the commands above?
This will help us narrow down whether this is a Docker networking issue or a Prefect configuration issue.