configuration option for dns server to use

[langdon]

/kind feature
also kind of a bug

Description
If you are using 127.0.0.1 in resolv.conf, podman appears to switch to using 8.8.8.8 in the containers it runs. In some networks that dns server may be blocked. You can work around this issue by passing --dns=<my-dns-server> but it would be nice to be able to set this system/user -wide.

I propose an entry in to the libpod.conf file(s). However, a similar issue is fixed via resolv.conf (if I am reading it correctly) here: #3277

Docker/Moby had a similar problem: moby/moby#23910

Output of podman version:

Version:            1.6.2
RemoteAPI Version:  1
Go Version:         go1.13.1
OS/Arch:            linux/amd64

Package info (e.g. output of rpm -q podman or apt list podman):

podman-1.6.2-2.fc31.x86_64

[mheon]

@rhatdan @QiWang19 Looks like a good candidate for containers.conf

[larsks]

Note that this is already possible in Docker, which lets you set the default resolver via /etc/docker/daemon.json (or as a command line argument to dockerd). I've hit the same problem as langdon and I agree that always having to add --dns a.b.c.d to my podman run invocations is annoying (particularly when I forget!).

[baude]

@rhatdan containers.conf ?

[rhatdan]

Yes @QiWang19 could easily add this option.

[rhatdan]

Begin adding support containers/common#29

[ensc]

Is this available in 1.7.0? containers.conf seems to be ignored with podman-1.7.0-0.5.rc2.fc31.x86_64

[mheon]

I don't believe it is - we're expecting initial support to land in 1.8.0. We'll begin gradually deprecating libpod.conf at that time as well.

[larsks]

@gbryant200 you seem to be in the wrong place: this is for bug reports about podman, which is an alternative to Docker. It's not for questions about Docker.

[github-actions]

A friendly reminder that this issue had no activity for 30 days.

[rhatdan]

@whitel The latest containers.conf in github.com/containers/common, has support for the dns server issue. The PR to get containers.conf support into Podman is very close. One more issue to get it merged.

[rhatdan]

containers.conf support is now in.

[langdon]

\o/