Docker networking question… regarding --net=container:<some_container> - what are the use cases for one container sharing the network namespace of another container? (sharing the same IP and MAC). Why would someone choose to use this container-mode networking vs creating a new bridge (or other)?

[image] lcalcote: what are the use cases for one container sharing the network namespace of another container? It depends if you mean exposed IP or not. Kubernetes pods have had this idea since the beginning. They believe that some applications belong together completely, and are separated by…

Jonostilla, I completely agree with your example, moreover, with the power of the pod concept. My specific inquiry aims to identify when the --net:container:some_container mode of Docker networking is useful. Here’s a quote from the docker documentation - https://docs.docker.com/v1.8/articles/netwo…

Shared network namespaces using --net=container:

General

bradqwood (Bradqwood) February 7, 2019, 8:07pm 4

Here’s one very practical example. You run a VPN Client in container A. You want only traffic from container B to run over the VPN that is established by container A. When you fire up container B, you pass in the --net:container:A switch and it then uses the vpn network stack of A.

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Shared network namespaces using --net=container:

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