Folks,

I am configuring NFS for the cinder backend but somehow it doesn't go well. I am running kolla-ansible with the 2023.1 release. 

cinder.conf 

[DEFAULT]

enabled_backends = volumes-ssd,volumes-nfs

[volumes-nfs]
volume_driver = cinder.volume.drivers.nfs.NfsDriver
volume_backend_name = volumes-nfs
nfs_shares_config = /etc/cinder/nfs_shares
nfs_snapshot_support = True
nas_secure_file_permissions = False
nas_secure_file_operations = False

Inside the cinder_volume docker container I can see it mounts NFS automatically and directory permissions is also cinder:cinder also I am able to write on NFS share also so it's not a permission issue also. 

$ docker exec -it cinder_volume mount | grep nfs
192.168.18.245:/volume1/NFS on /var/lib/cinder/mnt/1ec32c051aa5520a1ff679ce879da332 type nfs (rw,relatime,vers=3,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.18.245,mountvers=3,mountport=892,mountproto=udp,local_lock=none,addr=192.168.18.245)

But service is still showing down. 

| cinder-volume    | os-ctrl2@volumes-nfs  | nova | enabled | down  | 2024-02-28T04:13:11.000000 |

In logs I am seeing these 3 lines but then no activity in logs even after restarting the container so that is very strange. 

2024-02-28 04:13:12.995 153 ERROR os_brick.remotefs.remotefs [None req-6bcb8eab-6aa6-4c36-9a7a-ed673c39dcbc - - - - - -] Failed to mount 192.168.18.245:/volume1/NFS, reason: mount.nfs: Protocol not supported
: oslo_concurrency.processutils.ProcessExecutionError: Unexpected error while running command.
2024-02-28 04:13:13.501 153 WARNING cinder.volume.drivers.nfs [None req-6bcb8eab-6aa6-4c36-9a7a-ed673c39dcbc - - - - - -] The NAS file permissions mode will be 666 (allowing other/world read & write access). This is considered an insecure NAS environment. Please see https://docs.openstack.org/cinder/latest/admin/blockstorage-nfs-backend.html for information on a secure NFS configuration.
2024-02-28 04:13:13.501 153 WARNING cinder.volume.drivers.nfs [None req-6bcb8eab-6aa6-4c36-9a7a-ed673c39dcbc - - - - - -] The NAS file operations will be run as root: allowing root level access at the storage backend. This is considered an insecure NAS environment. Please see https://docs.openstack.org/cinder/latest/admin/blockstorage-nfs-backend.html for information on a secure NAS configuration.

Has anyone configured NFS and noticed any behavior?