Troubleshooting
PVE (All Nodes)
/etc/fstab
0644 root:root
10.10.10.8:/d/backup /autofs/backup nfs4 ro,nfsvers=4,minorversion=2,proto=tcp,fsc,rsize=1048576,wsize=1048576,nocto,_netdev 0 0
LXC Container
Add a standard container mountpoint directed at the NFS mount.
/etc/pve/lxc/{ID}.conf
0644 root:root
mp0: volume=/autofs/backup,mp=/data/backup,ro=1
blocklayout failed
Message may be ignored.
open pipe file /run/rpc_pipefs/nfs/blocklayout failed: No such file or directory
Loading the blocklayoutdriver resolves the message but creates another one. Upstream bug is closed as will not fix.