Comment 7 for bug 1811248

Going further, for those who are running arch containers in proxmox who reach here after googling via getting a message similar to this:

[ 2204.273155] audit: type=1400 audit(1548030556.960:100): apparmor="DENIED" operation="mount" info="failed flags match" error=-13 profile="lxc-101_</var/lib/lxc>" name="/" pid=26493comm="(networkd)" flags="rw, rslave"

the github link in the beginning has discussion on workarounds for the meantime:

https://github.com/lxc/lxc/issues/2778#issuecomment-455199160

I attempted to just modify "mount options=(rw,make-rslave)," in "/etc/apparmor.d/abstractions/lxc/container-base" which did not work sadly since the file "/var/lib/lxc/102/apparmor/lxc-{YOUR_CONTAINER_ID}_\<-var-lib-lxc\>" that is created when starting the container keeps the old commented out version of that line, even after rebooting the host. Instead, I ended up just adding "lxc.apparmor.profile: unconfined" to the "/etc/pve/lxc/{YOUR_CONTAINER_ID}.conf" file for each container and then restarting the container which disabled apparmor for all your containers which while terrible security wise, at least I get my containers back up while waiting for a bug fix.