There is no localhost on /etc/hosts

[1995parham]

/kind bug

I have setup rootless podman and after running a container everything works find but in the /etc/hosts/ I have the following content:

# Static table lookup for hostnames.
# See hosts(5) for details.
# used by slirp4netns
10.0.2.100      b932ec01d49e compassionate_visvesvaraya
10.0.2.2 host.containers.internal

but I think it should be:

# Static table lookup for hostnames.
# See hosts(5) for details.
127.0.0.1 localhost
# used by slirp4netns
10.0.2.100      b932ec01d49e compassionate_visvesvaraya
10.0.2.2 host.containers.internal

and because of that there is no resolution from localhost to 127.0.0.1.

[Luap99]

Can you share the commands you used?

[1995parham]

sure, I used the following command:

podman run -ti --rm bash 

Also, I can share my configuration if it helps.

[Luap99]

What is in /etc/hosts on the host?

[1995parham]

it is empty on my host but images by default has this, when I use no_hosts option I have localhost.

[Luap99]

Podman will use the the file from the host and then append the new entries, in your case for slirp4netns.
@mheon Should we add localhost if it does not exists in the host file, WDYT?

[mheon]

For slirp4netns and similar network modes, I would say yes.

For host networking, no, we should ensure that we exactly mirror the host system.

[1995parham]

so if you agree I can make a PR for this.

[mheon]

Sure

…

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