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<@ULVA73B9P> I am running prefect inside docker co...
# ask-marvin
m
@Marvin I am running prefect inside docker containers using below docker compose yml # version: '3.8' services: prefect: build: context: . dockerfile: Dockerfile.prefect environment: - PREFECT_UI_URL=http://localhost:4200/api - PREFECT_API_URL=http://localhost:4200/api - PREFECT_SERVER_API_HOST=0.0.0.0 volumes: - prefect_data:/root/.prefect - ./deploy:/root/deploy ports: - "4200:4200" healthcheck: test: ["CMD", "curl", "-f", "http://0.0.0.0:4200/api/health"] interval: 15s timeout: 10s retries: 3 start_period: 30s networks: - prefect-net entrypoint: ["/opt/prefect/entrypoint.sh", "prefect", "server", "start"] prefect-worker: build: context: . dockerfile: Dockerfile.prefect environment: - PREFECT_API_URL=http://prefect:4200/api entrypoint: ["/opt/prefect/entrypoint.sh", "prefect", "worker", "start", "-p", "my-pool" ,"--type","process"] depends_on: prefect: condition: service_healthy restart: on-failure volumes: - prefect_data:/root/.prefect - ./deploy:/root/deploy - /var/run/docker.sock:/var/run/docker.sock - ./data:/opt/prefect/data/ networks: - prefect-net networks: prefect-net: driver: bridge volumes: prefect_data: my deployment extract code from bitbucket from prefect import flow from prefect.runner.storage import GitRepository from prefect.blocks.system import Secret from pathlib import Path if name == "__main__": api_base = "https://dev.to/api" pages = 3 per_page = 30 output_file = Path("/root/data/devto_articles.csv") parameters_dict = {'api_base':api_base, 'pages':pages, 'per_page':per_page, 'output_file':output_file} github_repo = GitRepository( url="https://bitbucket.org/xx/dbt_duck_etl.git", credentials={ "access_token": Secret.load("bb-token") }, branch ='dev' ) flow.from_source( source=github_repo, entrypoint="src/flows/Amazon/etl.py:main" ).deploy( name="Amazon-bb-02", work_pool_name="my-pool", parameters = parameters_dict ) if i change "--type","process" to "--type","docker", flow crash . why is that
m
✅ thought for 60.8 seconds
Based on the research and looking at your Docker Compose setup, there are several reasons why your flow crashes when switching to a Docker worker: 1. Missing Package: The most likely issue is that the 
prefect-docker
package is not installed in your container. You need to add this to your Dockerfile:
Copy code
dockerfile
RUN pip install prefect-docker
2. Docker Socket Permissions: Although you've mounted the Docker socket (
/var/run/docker.sock
), the container user might not have the proper permissions to access it. The user running the Prefect worker needs to be in the 
docker
group. 3. Network Configuration: When using a Docker worker, the worker needs to be able to create new containers that can communicate with both the Prefect server and any external services. Your current network setup might need adjustment. Here's what you need to modify: 1. Update your Dockerfile.prefect to include:
Copy code
dockerfile
# Install prefect-docker
RUN pip install prefect-docker

# Add docker group and add user to it (assuming you're using root)
RUN groupadd docker || true && usermod -aG docker root
2. Modify your docker-compose.yml for the worker service:
Copy code
yaml
prefect-worker:
    # ... other configurations ...
    environment:
      - PREFECT_API_URL=<http://prefect:4200/api>
      # Add these for Docker worker logging
      - PREFECT_LOGGING_LEVEL=DEBUG
      - DOCKER_HOST=unix:///var/run/docker.sock
    volumes:
      - prefect_data:/root/.prefect
      - ./deploy:/root/deploy
      - /var/run/docker.sock:/var/run/docker.sock
      - ./data:/opt/prefect/data/
    privileged: true  # This might be needed for Docker-in-Docker
3. Make sure your work pool is configured correctly for Docker:
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bash
prefect work-pool create my-pool --type docker
To help debug the issue, you can: 1. Check the worker logs:
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bash
docker-compose logs prefect-worker
2. Verify the Docker socket is accessible inside the worker container:
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bash
docker-compose exec prefect-worker docker ps
3. Ensure the work pool is properly configured for Docker:
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bash
docker-compose exec prefect-worker prefect work-pool inspect my-pool
If you're still experiencing issues, it would be helpful to: 1. Share any error messages you're seeing in the logs 2. Confirm if you have 
prefect-docker
installed in your container 3. Share the contents of your Dockerfile.prefect Remember that when using a Docker worker, each flow run will create a new Docker container, so your infrastructure needs to be properly configured to handle this nested containerization (Docker-in-Docker) scenario.
m
it did not work, here is the part of worker logs @Marvin prefect-worker-1 | 121619.645 | DEBUG | prefect.profiles - Using profile 'ephemeral' prefect-worker-1 | 121621.155 | DEBUG | prefect.client - Connecting to API at http://prefect:4200/api/ prefect-worker-1 | 121621.231 | DEBUG | prefect.client - Connecting to API at http://prefect:4200/api/ prefect-worker-1 | 121621.395 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Entering worker context... prefect-worker-1 | 121621.410 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Setting up worker... prefect-worker-1 | 121621.434 | DEBUG | prefect.client - Connecting to API at http://prefect:4200/api/ prefect-worker-1 | 121621.475 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Worker synchronized with the Prefect API server. prefect-worker-1 | Worker 'DockerWorker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f' started! prefect-worker-1 | 121621.482 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 121621.487 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17 121631.483136+00:00 prefect-worker-1 | 121621.488 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'sync_with_backend' prefect-worker-1 | 121621.509 | DEBUG | prefect.events.clients - Reconnecting websocket connection. prefect-worker-1 | 121621.510 | DEBUG | prefect.events.clients - Opening websocket connection. prefect-worker-1 | 121621.532 | DEBUG | prefect.events.clients - Pinging to ensure websocket connected. prefect-worker-1 | 121621.534 | DEBUG | prefect.events.clients - Pong received. Websocket connected. prefect-worker-1 | 121621.535 | DEBUG | prefect.events.clients - Resending 0 unconfirmed events. prefect-worker-1 | 121621.536 | DEBUG | prefect.events.clients - Finished resending unconfirmed events. prefect-worker-1 | 121621.536 | DEBUG | prefect.client - Connecting to API at http://prefect:4200/api/ prefect-worker-1 | 121621.538 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Emitting event id=01981850-6fea-7928-b981-ce69cf674d0d. prefect-worker-1 | 121621.539 | DEBUG | prefect.events.clients - Added event id=01981850-6fea-7928-b981-ce69cf674d0d to unconfirmed events list. There are now 1 unconfirmed events. prefect-worker-1 | 121621.539 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Emit reconnection attempt 0. prefect-worker-1 | 121621.539 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Sending event id=01981850-6fea-7928-b981-ce69cf674d0d. prefect-worker-1 | 121621.540 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Checkpointing event id=01981850-6fea-7928-b981-ce69cf674d0d. prefect-worker-1 | 121621.556 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Discovered 0 scheduled_flow_runs prefect-worker-1 | 121621.579 | DEBUG | prefect.client - Received response with retryable status code 503. Another attempt will be made in 1.888936888800805s. This is attempt 1/6. prefect-worker-1 | 121623.482 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Worker synchronized with the Prefect API server. prefect-worker-1 | 121632.356 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 121632.357 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17 121642.357077+00:00 prefect-worker-1 | 121632.372 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Discovered 0 scheduled_flow_runs prefect-worker-1 | 121644.114 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 121644.115 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17 121654.115206+00:00 prefect-worker-1 | 121644.146 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Discovered 0 scheduled_flow_runs prefect-worker-1 | 121653.202 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 121653.203 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17 121703.202957+00:00 prefect-worker-1 | 121653.525 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Discovered 0 scheduled_flow_runs prefect-worker-1 | 121655.984 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'sync_with_backend' prefect-worker-1 | 121656.437 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Worker synchronized with the Prefect API server. prefect-worker-1 | 121701.637 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 121701.639 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17 121711.638976+00:00 prefect-worker-1 | 121701.672 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Discovered 0 scheduled_flow_runs prefect-worker-1 | 121711.270 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 121711.271 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17 121721.271532+00:00 prefect-worker-1 | 121711.313 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Discovered 1 scheduled_flow_runs prefect-worker-1 | 121711.314 | INFO | prefect.flow_runs.worker - Worker 'DockerWorker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f' submitting flow run 'cd664934-b816-4a75-bc2a-6632d22a0d0e' prefect-worker-1 | 121711.351 | DEBUG | prefect.client - Connecting to API at http://prefect:4200/api/ prefect-worker-1 | 121711.375 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Ready to submit cd664934-b816-4a75-bc2a-6632d22a0d0e: True prefect-worker-1 | fatal: not a git repository (or any of the parent directories): .git prefect-worker-1 | 121711.456 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Emitting event id=01981851-331d-7f79-a923-82ac64357631. prefect-worker-1 | 121711.457 | DEBUG | prefect.events.clients - Added event id=01981851-331d-7f79-a923-82ac64357631 to unconfirmed events list. There are now 2 unconfirmed events. prefect-worker-1 | 121711.457 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Emit reconnection attempt 0. prefect-worker-1 | 121711.457 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Sending event id=01981851-331d-7f79-a923-82ac64357631. prefect-worker-1 | 121711.458 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Checkpointing event id=01981851-331d-7f79-a923-82ac64357631. prefect-worker-1 | 121711.536 | INFO | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Creating Docker container 'perky-macaw'... prefect-worker-1 | 121711.537 | INFO | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Creating Docker container 'perky-macaw'... prefect-worker-1 | 121711.687 | INFO | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Docker container 'perky-macaw' has status 'created' prefect-worker-1 | 121711.687 | INFO | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Docker container 'perky-macaw' created successfully. prefect-worker-1 | 121711.690 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Emitting event id=01981851-3408-747b-9282-4648020416e6. prefect-worker-1 | 121711.690 | DEBUG | prefect.events.clients - Added event id=01981851-3408-747b-9282-4648020416e6 to unconfirmed events list. There are now 3 unconfirmed events. prefect-worker-1 | 121711.690 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Emit reconnection attempt 0. prefect-worker-1 | 121711.691 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Sending event id=01981851-3408-747b-9282-4648020416e6. prefect-worker-1 | 121711.692 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Checkpointing event id=01981851-3408-747b-9282-4648020416e6. prefect-worker-1 | 121715.134 | INFO | prefect.flow_runs.worker - Completed submission of flow run 'cd664934-b816-4a75-bc2a-6632d22a0d0e' prefect-worker-1 | 121715.138 | INFO | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Docker container 'perky-macaw' has status 'running' prefect-worker-1 | 121715.141 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Emitting event id=01981851-4184-7b44-a846-ea6949c59420. prefect-worker-1 | 121715.142 | DEBUG | prefect.events.clients - Added event id=01981851-4184-7b44-a846-ea6949c59420 to unconfirmed events list. There are now 4 unconfirmed events. prefect-worker-1 | 121715.144 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Emit reconnection attempt 0. prefect-worker-1 | 121715.144 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Sending event id=01981851-4184-7b44-a846-ea6949c59420. prefect-worker-1 | 121715.145 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Checkpointing event id=01981851-4184-7b44-a846-ea6949c59420. prefect-worker-1 | 121722.069 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 121722.070 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17 121732.069812+00:00
m
Your message was too long, here's your message at the allowed limit: it did not work here is the part of worker logs prefect-worker-1 | 12 16 19 645 | DEBUG | prefect profiles - Using profile 'ephemeral' prefect-worker-1 | 12 16 21 155 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 231 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 395 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Entering worker context prefect-worker-1 | 12 16 21 410 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Setting up worker prefect-worker-1 | 12 16 21 434 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 475 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Worker synchronized with the Prefect API server prefect-worker-1 | Worker 'DockerWorker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f' started! prefect-worker-1 | 12 16 21 482 | DEBUG | prefect utilities services critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 12 16 21 487 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17 12 16 31 483136+00 00 prefect-worker-1 | 12 16 21 488 | DEBUG | prefect utilities services critical_service_loop - Starting run of 'sync_with_backend' prefect-worker-1 | 12 16 21 509 | DEBUG | prefect events clients - Reconnecting websocket connection prefect-worker-1 | 12 16 21 510 | DEBUG | prefect events clients - Opening websocket connection prefect-worker-1 | 12 16 21 532 | DEBUG | prefect events clients - Pinging to ensure websocket connected prefect-worker-1 | 12 16 21 534 | DEBUG | prefect events clients - Pong received Websocket connected prefect-worker-1 | 12 16 21 535 | DEBUG | prefect events clients - Resending 0 unconfirmed events prefect-worker-1 | 12 16 21 536 | DEBUG | prefect events clients - Finished resending unconfirmed events prefect-worker-1 | 12 16 21 536 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 538 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Emitting event id=01981850-6fea-7928-b981-ce69cf674d0d prefect-worker-1 | 12 16 21 539 | DEBUG | prefect events clients - Added event id=01981850-6fea-7928-b981-ce69cf674d0d to unconfirmed events list There are now 1 unconfirmed events prefect-worker-1 | 12 16 21 539 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Emit reconnection attempt 0 prefect-worker-1 | 12 16 21 539 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Sending event id=01981850-6fea-7928-b981-ce69cf674d0d prefect-worker-1 | 12 16 21 540 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Checkpointing event id=01981850-6fea-7928-b981-ce69cf674d0d prefect-worker-1 | 12 16 21 556 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Discovered 0 scheduled_flow_runs prefect-worker-1 | 12 16 21 579 | DEBUG | prefect client - Received response with retryable status code 503 Another attempt will be made in 1 888936888800805s This is attempt 1/6 prefect-worker-1 | 12 16 23 482 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Worker synchronized with the Prefect API server prefect-worker-1 | 12 16
m
@Marvin can you help me with this looking at logs
m
✅ thought for 4.8 seconds
I'll help you analyze the logs, but you haven't shared them yet. Could you please provide: 1. The error messages you're seeing in the worker logs 2. The Prefect UI logs for the failed flow run (if available) You can get the logs by running:
Copy code
bash
docker-compose logs prefect-worker
Once you share the logs, I can help identify the specific issue and provide a targeted solution. The logs will help us understand: - Whether it's a permissions issue - If there's a package missing - If there's a network configuration problem - Or if there's some other underlying issue Please share the relevant logs and I'll help diagnose the problem.
m
@Marvin here are the logs prefect-worker-1 | 121619.645 | DEBUG | prefect.profiles - Using profile 'ephemeral' prefect-worker-1 | 121621.155 | DEBUG | prefect.client - Connecting to API at http://prefect:4200/api/ prefect-worker-1 | 121621.231 | DEBUG | prefect.client - Connecting to API at http://prefect:4200/api/ prefect-worker-1 | 121621.395 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Entering worker context... prefect-worker-1 | 121621.410 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Setting up worker... prefect-worker-1 | 121621.434 | DEBUG | prefect.client - Connecting to API at http://prefect:4200/api/ prefect-worker-1 | 121621.475 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Worker synchronized with the Prefect API server. prefect-worker-1 | Worker 'DockerWorker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f' started! prefect-worker-1 | 121621.482 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 121621.487 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17 121631.483136+00:00 prefect-worker-1 | 121621.488 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'sync_with_backend' prefect-worker-1 | 121621.509 | DEBUG | prefect.events.clients - Reconnecting websocket connection. prefect-worker-1 | 121621.510 | DEBUG | prefect.events.clients - Opening websocket connection. prefect-worker-1 | 121621.532 | DEBUG | prefect.events.clients - Pinging to ensure websocket connected. prefect-worker-1 | 121621.534 | DEBUG | prefect.events.clients - Pong received. Websocket connected. prefect-worker-1 | 121621.535 | DEBUG | prefect.events.clients - Resending 0 unconfirmed events. prefect-worker-1 | 121621.536 | DEBUG | prefect.events.clients - Finished resending unconfirmed events. prefect-worker-1 | 121621.536 | DEBUG | prefect.client - Connecting to API at http://prefect:4200/api/ prefect-worker-1 | 121621.538 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Emitting event id=01981850-6fea-7928-b981-ce69cf674d0d. prefect-worker-1 | 121621.539 | DEBUG | prefect.events.clients - Added event id=01981850-6fea-7928-b981-ce69cf674d0d to unconfirmed events list. There are now 1 unconfirmed events. prefect-worker-1 | 121621.539 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Emit reconnection attempt 0. prefect-worker-1 | 121621.539 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Sending event id=01981850-6fea-7928-b981-ce69cf674d0d. prefect-worker-1 | 121621.540 | DEBUG | prefect.events.clients - EventsClient(id=140075668791008): Checkpointing event id=01981850-6fea-7928-b981-ce69cf674d0d. prefect-worker-1 | 121621.556 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Discovered 0 scheduled_flow_runs prefect-worker-1 | 121621.579 | DEBUG | prefect.client - Received response with retryable status code 503. Another attempt will be made in 1.888936888800805s. This is attempt 1/6. prefect-worker-1 | 121623.482 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Worker synchronized with the Prefect API server. prefect-worker-1 | 121632.356 | DEBUG | prefect.utilities.services.critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 121632.357 | DEBUG | prefect.workers.docker.dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17
m
Your message was too long, here's your message at the allowed limit: here are the logs prefect-worker-1 | 12 16 19 645 | DEBUG | prefect profiles - Using profile 'ephemeral' prefect-worker-1 | 12 16 21 155 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 231 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 395 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Entering worker context prefect-worker-1 | 12 16 21 410 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Setting up worker prefect-worker-1 | 12 16 21 434 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 475 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Worker synchronized with the Prefect API server prefect-worker-1 | Worker 'DockerWorker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f' started! prefect-worker-1 | 12 16 21 482 | DEBUG | prefect utilities services critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 12 16 21 487 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17 12 16 31 483136+00 00 prefect-worker-1 | 12 16 21 488 | DEBUG | prefect utilities services critical_service_loop - Starting run of 'sync_with_backend' prefect-worker-1 | 12 16 21 509 | DEBUG | prefect events clients - Reconnecting websocket connection prefect-worker-1 | 12 16 21 510 | DEBUG | prefect events clients - Opening websocket connection prefect-worker-1 | 12 16 21 532 | DEBUG | prefect events clients - Pinging to ensure websocket connected prefect-worker-1 | 12 16 21 534 | DEBUG | prefect events clients - Pong received Websocket connected prefect-worker-1 | 12 16 21 535 | DEBUG | prefect events clients - Resending 0 unconfirmed events prefect-worker-1 | 12 16 21 536 | DEBUG | prefect events clients - Finished resending unconfirmed events prefect-worker-1 | 12 16 21 536 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 538 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Emitting event id=01981850-6fea-7928-b981-ce69cf674d0d prefect-worker-1 | 12 16 21 539 | DEBUG | prefect events clients - Added event id=01981850-6fea-7928-b981-ce69cf674d0d to unconfirmed events list There are now 1 unconfirmed events prefect-worker-1 | 12 16 21 539 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Emit reconnection attempt 0 prefect-worker-1 | 12 16 21 539 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Sending event id=01981850-6fea-7928-b981-ce69cf674d0d prefect-worker-1 | 12 16 21 540 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Checkpointing event id=01981850-6fea-7928-b981-ce69cf674d0d prefect-worker-1 | 12 16 21 556 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Discovered 0 scheduled_flow_runs prefect-worker-1 | 12 16 21 579 | DEBUG | prefect client - Received response with retryable status code 503 Another attempt will be made in 1 888936888800805s This is attempt 1/6 prefect-worker-1 | 12 16 23 482 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Worker synchronized with the Prefect API server prefect-worker-1 | 12 16 32 356 | DEBUG | prefect utilities
m
@Marvin here are the logs prefect-worker-1 | 12 16 19 645 | DEBUG | prefect profiles - Using profile 'ephemeral' prefect-worker-1 | 12 16 21 155 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 231 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 395 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Entering worker context prefect-worker-1 | 12 16 21 410 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Setting up worker prefect-worker-1 | 12 16 21 434 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 475 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Worker synchronized with the Prefect API server prefect-worker-1 | Worker 'DockerWorker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f' started! prefect-worker-1 | 12 16 21 482 | DEBUG | prefect utilities services critical_service_loop - Starting run of 'get_and_submit_flow_runs' prefect-worker-1 | 12 16 21 487 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Querying for flow runs scheduled before 2025-07-17 12 16 31 483136+00 00 prefect-worker-1 | 12 16 21 488 | DEBUG | prefect utilities services critical_service_loop - Starting run of 'sync_with_backend' prefect-worker-1 | 12 16 21 509 | DEBUG | prefect events clients - Reconnecting websocket connection prefect-worker-1 | 12 16 21 510 | DEBUG | prefect events clients - Opening websocket connection prefect-worker-1 | 12 16 21 532 | DEBUG | prefect events clients - Pinging to ensure websocket connected prefect-worker-1 | 12 16 21 534 | DEBUG | prefect events clients - Pong received Websocket connected prefect-worker-1 | 12 16 21 535 | DEBUG | prefect events clients - Resending 0 unconfirmed events prefect-worker-1 | 12 16 21 536 | DEBUG | prefect events clients - Finished resending unconfirmed events prefect-worker-1 | 12 16 21 536 | DEBUG | prefect client - Connecting to API at <http //prefect 4200/api/> prefect-worker-1 | 12 16 21 538 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Emitting event id=01981850-6fea-7928-b981-ce69cf674d0d prefect-worker-1 | 12 16 21 539 | DEBUG | prefect events clients - Added event id=01981850-6fea-7928-b981-ce69cf674d0d to unconfirmed events list There are now 1 unconfirmed events prefect-worker-1 | 12 16 21 539 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Emit reconnection attempt 0 prefect-worker-1 | 12 16 21 539 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Sending event id=01981850-6fea-7928-b981-ce69cf674d0d prefect-worker-1 | 12 16 21 540 | DEBUG | prefect events clients - EventsClient(id=140075668791008) Checkpointing event id=01981850-6fea-7928-b981-ce69cf674d0d prefect-worker-1 | 12 16 21 556 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Discovered 0 scheduled_flow_runs prefect-worker-1 | 12 16 21 579 | DEBUG | prefect client - Received response with retryable status code 503 Another attempt will be made in 1 888936888800805s This is attempt 1/6 prefect-worker-1 | 12 16 23 482 | DEBUG | prefect workers docker dockerworker 3cb5ff9d-3d5b-439e-8d34-c3d2bcaa296f - Worker synchronized with the Prefect API server prefect-worker-1 | 12 16 32 356 | DEBUG | prefect utilities
m
✅ thought for 35.3 seconds
Based on the logs and research, I can see that the worker is starting up correctly but is having trouble maintaining a connection to the Prefect server. Let's fix this step by step: 1. First, let's verify that the Docker worker has all required dependencies:
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dockerfile
# Add to your Dockerfile.prefect
RUN pip install prefect-docker
2. The network configuration needs adjustment. In your docker-compose.yml, modify the worker service:
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yaml
prefect-worker:
    build:
      context: .
      dockerfile: Dockerfile.prefect
    environment:
      - PREFECT_API_URL=<http://prefect:4200/api>
      # Add these for better debugging
      - PREFECT_LOGGING_LEVEL=DEBUG
      - DOCKER_HOST=unix:///var/run/docker.sock
      # Add this to ensure the worker can reach the Prefect server
      - PREFECT_SERVER_API_HOST=prefect
    volumes:
      - prefect_data:/root/.prefect
      - ./deploy:/root/deploy
      - /var/run/docker.sock:/var/run/docker.sock
      - ./data:/opt/prefect/data/
    # Add these for Docker-in-Docker functionality
    privileged: true
    networks:
      - prefect-net
3. Ensure your work pool is configured correctly for Docker:
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bash
# First, check the current work pool configuration
docker-compose exec prefect-worker prefect work-pool inspect my-pool

# If needed, create a new Docker work pool
docker-compose exec prefect-worker prefect work-pool create my-pool --type docker
4. Modify your deployment code to ensure it's compatible with Docker execution:
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python
from prefect import flow
from prefect.runner.storage import GitRepository
from prefect.blocks.system import Secret

if __name__ == "__main__":
    api_base = "<https://dev.to/api>"
    pages = 3
    per_page = 30
    output_file = Path("/root/data/devto_articles.csv")

    parameters_dict = {
        'api_base': api_base,
        'pages': pages,
        'per_page': per_page,
        'output_file': output_file
    }

    github_repo = GitRepository(
        url="<https://bitbucket.org/xx/dbt_duck_etl.git>",
        credentials={
            "access_token": Secret.load("bb-token")
        },
        branch='dev'
    )

    # Add Docker-specific configuration
    flow.from_source(
        source=github_repo,
        entrypoint="src/flows/Amazon/etl.py:main"
    ).deploy(
        name="Amazon-bb-02",
        work_pool_name="my-pool",
        parameters=parameters_dict,
    )
5. Restart your services in the correct order:
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bash
# Stop all services
docker-compose down

# Remove any stale volumes (optional, if you want a clean start)
docker-compose down -v

# Start the services
docker-compose up -d prefect
# Wait a moment for the server to be healthy
docker-compose up -d prefect-worker
6. Monitor the logs for both services:
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bash
# Watch the server logs
docker-compose logs -f prefect

# In another terminal, watch the worker logs
docker-compose logs -f prefect-worker
The 503 error you're seeing typically indicates that the worker is having trouble maintaining a connection to the Prefect server. This could be due to: 1. Network connectivity issues between containers 2. The Prefect server not being fully ready when the worker tries to connect 3. Docker socket permissions issues To help debug further: 1. Verify the Docker socket permissions:
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bash
docker-compose exec prefect-worker ls -l /var/run/docker.sock
2. Test the connection from the worker to the server:
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bash
docker-compose exec prefect-worker curl <http://prefect:4200/api/health>
3. Check if Docker commands work within the worker container:
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bash
docker-compose exec prefect-worker docker ps
If you're still seeing issues after implementing these changes, please share: 1. The updated logs after making these changes 2. The output of the debug commands above 3. The contents of your Dockerfile.prefect
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