@Marvin I'm trying to put prefect inside a docker compose, I have a service that makes prefect server start and I see that the server is ok: prefect_server | | _ \ _ \ __| __| __/ _| _| prefect_server | | _/ / _|| _|| | (_ | | prefect_server | |_| |_|_\___|_| |___\___| |_| prefect_server | prefect_server | Configure Prefect to communicate with the server with: prefect_server | prefect_server | prefect config set PREFECT_API_URL=http://127.0.0.1:4200/api prefect_server | prefect_server | View the API reference documentation at http://127.0.0.1:4200/docs prefect_server | prefect_server | Check out the dashboard at http://127.0.0.1:4200 but when I try to access from my desktop it does not work. In the docker compose I have the mapping 4200:4200

You are seeing the Prefect server start up correctly, but you can't access it from your desktop. Here are some possible issues and solutions: 1. Docker Network Configuration: Ensure that you are mapping the correct ports for external access. It seems you have configured port

4200:4200

. Verify that your Docker container is configured to listen on

0.0.0.0

. 2. Network Configuration in Services: Make sure that Prefect's service is configured to allow access from outside of the Docker network. Your Docker Compose file for the Prefect server section should look similar to:

yaml
    version: '3.9'
    services:
      prefect_server:
        image: prefecthq/prefect:2-python3.11
        restart: always
        volumes:
          - prefect:/root/.prefect
        entrypoint: ["prefect", "server", "start"]
        environment:
          PREFECT_SERVER_API_HOST: 0.0.0.0
        ports:
          - "4200:4200"
    volumes:
      prefect:

3. Firewall Rules and VPN Configuration: If you are on a corporate network or VPN, ensure that firewall rules allow traffic on port 4200. Some corporate networks or VPNs may block certain ports. 4. Network Binding: Ensure that the Prefect server is binding to

0.0.0.0

and not

127.0.0.1

(localhost). The

PREFECT_API_URL

should point to your Docker host's IP address, not

127.0.0.1

. 5. Accessing the Correct IP: From your desktop, ensure you are accessing the correct IP address. It should be the IP address of the machine running Docker. For additional insights, you can refer to the Prefect documentation on Docker, which gives detailed instructions and common troubleshooting steps. If you are still facing issues, you may check relevant GitHub issues such as Prefect UI blank screen and errors over VPN for similar network-related problems.