I’m getting a very similar error to this, with a process attempting to remount “/home/”:
kernel: [328822.581315] audit: type=1400 audit(1543007365.154:362): apparmor=“DENIED” operation=“mount” info=“failed flags match” error=-13 profile=“lxd-webserver</var/lib/lxd>” name="/home/" pid=3132 comm="(ionclean)" flags=“ro, nosuid, nodev, remount, bind”
I’m on Ubuntu 18.04 with lxd 3.0.2 on zfs with the container zpool on a dedicated partition. This error is happening on two containers, both of them running apache and php, but not on any other containers (running a variety of services, but none with apache or php). On one container, running Ubuntu 16.04, I get a the error twice a day. On the other, running Ubuntu 18.04, it is happening twice an hour.