Arch Linux - implementing Docker Network Bridge Not Forwarding Traffic as Expected
I just started working with I'm working on a project and hit a roadblock. I'm reviewing some code and I've searched everywhere and can't find a clear answer. I'm running Arch Linux with Docker version 20.10.7, and I've encountered a frustrating scenario where my Docker containers on a custom bridge network need to communicate with each other or access the internet. I created the bridge network using the following command: ```bash docker network create --driver bridge my_custom_bridge ``` I then launched two containers using this custom bridge: ```bash docker run -d --name container1 --network my_custom_bridge nginx docker run -d --name container2 --network my_custom_bridge nginx ``` When I try to ping one container from the other, I get 'Destination Host Unreachable'. I checked the IP addresses assigned to both containers and they are indeed on the same subnet (172.18.0.0/16) as expected. I also confirmed that `iptables` is set up correctly to allow traffic on the Docker bridge network. The output of `iptables -L` shows the following rules: ```bash Chain DOCKER (1 references) target prot opt source destination ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- anywhere anywhere ``` To troubleshoot further, I tried running a simple HTTP server on `container1` and then executed the following command from `container2`: ```bash curl http://172.18.0.2 ``` However, this resulted in a timeout. After looking into the Docker daemon logs with `journalctl -u docker.service`, I noticed the following warning messages: ``` WARN: Network 'my_custom_bridge' has no explicit ipam configuration ``` Despite the warning, the bridge network was created without specifying IPAM settings, which I thought should be okay. I also tried removing and recreating the bridge network, but that did not resolve the scenario. Has anyone encountered a similar question or have any suggestions for what might be going wrong? This is part of a larger API I'm building. Am I missing something obvious? Could someone point me to the right documentation? I'm coming from a different tech stack and learning Bash. The project is a application built with Bash. Any examples would be super helpful. I'm working in a Windows 11 environment. Thanks, I really appreciate it!