The goal of this card is to merge the PR that adapts container-libs to support a new Netavark feature.

PR: https://github.com/containers/container-libs/pull/557

What were you trying to do that didn't work?

There is a use-case for configuring multiple IP addresses per (mavclan/ipvlan) interface in a rootful container that does not have NET_ADMIN capability for hardening purposes. Those IP addresses belong to the same large subnet.

This is a supported configuration in Linux kernel. https://www.kernel.org/doc/html/latest/networking/alias.html

The ask is to provide option in the `podman run` command so that the IP addresses are setup as soon as the container is up and `podman inspect` can show the configured IP addresses for automation purpose.

Describe the impact to you or the business
Usecase is to assign multiple IP addresses for their large segment interface to backup the infrastructure from different client segments. One can achieve this in BYO and other systems where multiple IP addresses can be configured.