I've been running about 9 Docker containers smoothly for 7-8 months, but after launching a few more, they suddenly can't communicate with each other. While I can access the GUI of a container from another PC on my LAN, they're unable to connect with each other or even with other services like qbittorrent installed on the host machine. Has anyone run into this issue before? I also tried reinstalling Docker Desktop but the problem returned after starting all containers. It seems like there's a threshold that, once crossed, causes networking issues between containers. Any tips or insights?
1 Answer
There could be some underlying limits on your host OS that affect container networking, but these limits typically allow for thousands of containers. Many production systems run hundreds of containers per node. It's unlikely the limit comes from Docker itself; it might be more of a host OS issue that’s causing the communication failure.
What specific limits could be impacting communication between the host and containers? Even if the host can connect to other machines?