I'm currently developing an app that utilizes TCP socket communication between a client and server setup. For this, I've set up three Docker containers: one for the server, another for the client, and a third for running tests, which are functioning well. The client is written in Python, while the other components are coded in C++. I'm encountering an issue where the client fails to connect, and I receive the error message: '[Errno 111] Connection refused'. Can anyone assist me in identifying potential reasons for this issue?
2 Answers
It sounds like your client might not be targeting the correct server address or port. Make sure that in your client code, you're connecting to the server's IP address and the port defined in your Docker configuration (12345). If they're running in the same Docker network, you can typically use the container name as the hostname. Also, ensure that the server is up and running before you start the client!
Have you looked into your Docker network settings? Confirm that your client is on the same Docker network as the server. If they're on different networks, they won't be able to communicate. Also, make sure the server container is set to restart if it crashes, as container restarts can affect connection stability!
Yeah, that’s a good point! You might want to check Docker logs too. Sometimes, if the server fails to start properly, the client would just see a connection refused error.
Totally agree! I'd also recommend checking if the server is indeed listening on the specified port. You can use commands like `netstat` inside the server container to verify that!