For my compute, I prefer to run proxmox, and it allows you to run containers via LXC. These will use the currently running kernel and boot close to instantly, with a much lower overhead than a KVM-based VM.
Anyhow, trying to run avahi-daemon in the containers often fails. I'm not the first to notice this, but the answers were unsatisfying until I found a suggestion to try running with --no-rlimits.
To make the change persistence using systemdis simple.
Once the system editor opens add the following to the top of the file
[Service]
ExecStart=
ExecStart=/usr/sbin/avahi-daemon -s --no-rlimits
Tell systemd that you wish to create an overide file
systemctl edit avahi-daemon.service
