How to set containers.dns_servers to "none"?

[sgrins]

According to docs The special value “none” can be specified to disable creation of /etc/resolv.conf in the container.
Used the following file /home/user/test.conf:

[containers]
dns_servers = "none"

Got:

user@test:~$ podman --module /home/user/test.conf run --rm alpine cat /etc/resolv.conf
Failed to obtain podman configuration: reading additional config "/home/user/test.conf": decode configuration /home/user/test.conf: toml: line 2 (last key "containers.dns_servers"): unable to cast to interface array: none

Tried dns_servers = none, dns_servers = which resulted in similar error; and dns_servers = ["none"] which made netavark complain about wrong IP address format while pasta created the file with nameserver none in it.

With --dns none option got expected behavior:

user@test:~$ podman run --rm --dns none alpine cat /etc/resolv.conf
cat: can't open '/etc/resolv.conf': No such file or directory

Tested on 4.9.3, 5.4.1, 5.5.1 and 5.6.0-dev (main, commit dbebcbe)

Any ideas on how to set containers.dns_servers to "none"?

[Luap99]

dns_servers = ["none"] that should be the right format

If this fails it seems we don't correctly handle the case when the none is set in the config file so I would say this is a bug

[sgrins]

Yes, with dns_servers = ["none"] it seems like "none" used as an IP address. netavark results in:

root@test:~# podman --module /home/user/test.conf run --rm alpine cat /etc/resolv.conf
Error: netavark: failed to load network options: IO error: invalid IP address syntax at line 1 column 237

And pasta results in:

user@test:~$ podman --module /home/user/test.conf run --rm alpine cat /etc/resolv.conf
nameserver none

on main, commit dbebcbe