LXC Container with NFS Server permissions

proxmox5-lxc-nfs-server.txt

Create this a file at /etc/apparmor.d/lxc/lxc-default-with-nfsd and add this content:

# Do not load this file.  Rather, load /etc/apparmor.d/lxc-containers, which
# will source all profiles under /etc/apparmor.d/lxc

profile lxc-container-default-with-nfsd flags=(attach_disconnected,mediate_deleted) {
  #include <abstractions/lxc/container-base>

  # the container may never be allowed to mount devpts.  If it does, it
  # will remount the host's devpts.  We could allow it to do it with
  # the newinstance option (but, right now, we don't).
  deny mount fstype=devpts,
  mount fstype=nfsd,
  mount fstype=rpc_pipefs,
  mount fstype=cgroup -> /sys/fs/cgroup/**,
}


Edit /etc/pve/lxc/<CTID>.conf and add this line to the end: 

lxc.apparmor.profile = lxc-container-default-with-nfsd


Reboot the container

from here: https://forum.proxmox.com/threads/is-it-possible-to-run-a-nfs-server-within-a-lxc.24403/ but had to change the container config with details from here: https://www.reddit.com/r/Proxmox/comments/8eesbb/lxc_container_nfs_server/