Possibility to set domainname via REST Endpoint

[msisj]

Is this a BUG REPORT or FEATURE REQUEST? (leave only one on its own line)

/kind feature

Description

I'd like to implement possibility to set domainname in podman-py project but according to the podman REST API there is no such option.
Interestingly enough under compact (aka docker compatibility) endpoint there is such parameter, but podman-py (rightfully) does not use this endpoint to create container.

I'm also not seeing this option in cli (to be fair docker up until 1.40~ did not have this option either, but the call on the docker-py worked properly).

The inspect in podman shows the empty value, which makes me wonder whether this was forgotten or is there other option to fill the domainname?

[root ~]# podman inspect test --format '{{json .Config}}' | jq | head -n 3
{
  "Hostname": "test",
  "Domainname": "",

Is there possibility to add possibility to add domainname, to at least REST endpoint ?

[rhatdan]

@mheon @jwhonce @cdoern PTAL

[mheon]

Does anyone know what this does in Docker? We can easily add this to the DB, but I don't really know what it would actually do once set?

[rhatdan]

domainname is used by NIS and NFS (Perhaps).

https://www.geeksforgeeks.org/domainname-command-in-linux-with-examples/

[cdoern]

I feel like if we support this natively, and both docker-py and docker have it everywhere, we should to. Looking at alot of those unsupported options in podman-py makes me think, with recent changes in podman a lot of those can be supported.

I'll put this on my list of api/podman-py related things to do

[Luap99]

I think we need a podman run/create flag as well:

'docker create --help' lists '--domainname', which is not in docs/source/markdown/podman-create.1.md

From the cli differences issue #14917

[cdoern]

@Luap99 sorry for my unfamiliarity here, but this just sets another entry in /etc/hosts right?

[Luap99]

I have no idea, we have to do whatever docker does. I assume it appends the domain to the hostname as well?

[cdoern]

I have no idea, we have to do whatever docker does. I assume it appends the domain to the hostname as well?

thats what I've found everywhere. Docker has a link to https://man7.org/linux/man-pages/man2/getdomainname.2.html which makes me think that's all it is. So domainnmae has to be specified with hostname... i guess?

[github-actions]

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

[cdoern]

in progress

[github-actions]

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

[rhatdan]

@cdoern how is this coming?

[cdoern]

@rhatdan working on it this week over fall break