IPv6 support in Rancher Desktop

[gunamata]

Problem Description

Rancher Desktop doesn't support IPv6 at present leading to problems using localhost for example.

Proposed Solution

Support IPV6

Additional Information

No response

Preflight Checklist

• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

[jandubois]

This should be implemented now by 1.6.0 for the moby backend.

containerd and kubernetes only forward to IPv4 right now and need to be updated.

[ngraef]

This should be implemented now by 1.6.0 for the moby backend.

@jandubois Could you expand on what you mean by that? Is that only within the container network, or would you expect port binding [::1] to work?

With docker run -p 8080:80 nginx, docker ps reports the container's ports as 0.0.0.0:8080->80/tcp, :::8080->80/tcp. curl -4 "http://127.0.0.1:8080" succeeds, but curl -6 "http://[::1]:8080" fails with error curl: (7) Failed to connect to ::1 port 8080 after 5 ms: Couldn't connect to server. I would expect both to work.

Explicitly binding to IPv6 also doesn't work. With docker run -p '[::1]:8080:80' nginx, docker ps shows the container's ports as ::1:8080->80/tcp. Interestingly, connecting to 127.0.0.1 still succeeds and [::1] still fails in this case.

Environment

• macOS Ventura 13.3, Apple silicon
• Rancher Desktop v1.8.1
  • Administrative Access enabled
  • moby container engine

[kbakba]

related issue in Docker Desktop docker/for-mac#1432