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I currently have a docker-compose setup with one container running an OpenVPN client and some containers behind it using --net=container to attach to the network stack of the OpenVPN client container to use it's network connection for outgoing traffic.

I want to adapt this to k8s (I'm using Weave currently for networking) but I am not sure how to approach it. I could route it on the host system manually but I want to implement this in Kubernetes directly without the need of manually messing around with the host system.

Since the Pod's pause container has a similar set-up with --net=container for all containers inside I though of utilizing this but I figured out that the only way to use a custom image for the pause container will change it globally and not on a per-pod basis.

Any ideas?

  • I can't catch the reason, you need OpenVPN client to connect your cluster to different network or you just provide the connection outside through the OpenVPN client? – Nick Rak Jan 3 at 11:45
  • @NickRak I want some of my pods to route their traffic through a different network that's only reachable by VPN while some other pods keep the connectivity through the host system's network. In my old setup, I had one OpenVPN client container with IP forwarding turned on and just used --net=container:openvpn to route all the packets of the containers behind through this VPN connection. – Davd Jan 3 at 12:01
  • If I understand clear you need to manage your traffic from your new kubernetes env to another network by one endpoint, you could use for it Istio. Using gateways for egress traffic you will manage all connections from inside the kubernetes cluster. For more detailed information I need more details to provide you better answer. – Nick Rak Jan 3 at 13:50

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