[NFS-Ganesha-Support] FSAL :CRIT :This libcephfs version doesn't support named filesystems

15 Jan 2021

      Hi,

I am running a Debian 10 with
root@nfsshares-a:~# dpkg -l | grep ganesha
ii  nfs-ganesha                   3.3-4                             amd64        nfs-ganesha is a NFS server in User Space
ii  nfs-ganesha-ceph:amd64        3.3-4                             amd64        nfs-ganesha fsal ceph libraries
ii  nfs-ganesha-rados-grace:amd64 3.3-4                             amd64        nfs-ganesha ganesha-rados-grace program

and

root@nfsshares-a:~# dpkg -l | grep ceph
ii  ceph-common                   14.2.16-pve1                      amd64        common utilities to mount and interact with a ceph storage cluster
ii  libcephfs2                    14.2.16-pve1                      amd64        Ceph distributed file system client library
ii  nfs-ganesha-ceph:amd64        3.3-4                             amd64        nfs-ganesha fsal ceph libraries
ii  python-ceph-argparse          14.2.16-pve1                      all          Python 2 utility libraries for Ceph CLI
ii  python-cephfs                 14.2.16-pve1                      amd64        Python 2 libraries for the Ceph libcephfs library

The config looks like this:
root@nfsshares-a:~# grep '^[[:blank:]]*[^[:blank:]#;]' /etc/ganesha/ganesha.conf
NFS_CORE_PARAM
{
        Enable_NLM = false;
        Enable_RQUOTA = false;
        Protocols = 3,4;
        mount_path_pseudo = true;
}
NFS_KRB5
{
        Active_krb5 = false;
}
NFSv4
{
        RecoveryBackend = rados_ng;
        Minor_Versions =  1,2;
}
MDCACHE {
        Dir_Chunk = 0;
}
EXPORT_DEFAULTS {
        SecType = "sys";
        Squash = No_Root_Squash;
        Attr_Expiration_Time = 0;
}
CEPH
{
        Ceph_Conf = /etc/ceph/ceph.conf;
}
RADOS_KV
{
        Ceph_Conf = /etc/ceph/ceph.conf;
        UserId = "ganesharecov";
        nodeid = "nfsshares-a";
}
RADOS_URLS
{
        Ceph_Conf = /etc/ceph/ceph.conf;
        UserId = "ganeshaurls";
        watch_url = "rados://nfs-ganesha/ganesha-namespace/conf-nfsshares";
}
%url    rados://nfs-ganesha/ganesha-namespace/conf-nfsshares

The Export configuration is created on the ceph dashboard and looks like this:
root@proxmox07:~# cat /tmp/conf-nfsshares
%url "rados://nfs-ganesha/ganesha-namespace/export-1"

root@proxmox07:~# cat /tmp/export-1
EXPORT {
    FSAL {
        secret_access_key = "AQDm7eFfJWvhIBAAuI++d0SNkdylNkMx5t/N8w==";
        user_id = "ganesha";
        name = "CEPH";
        filesystem = "cephfs";
    }

    CLIENT {
        clients = 10.20.56.254;
        squash = "no_root_squash";
        access_type = "RW";
    }

    pseudo = "/";
    squash = "no_root_squash";
    access_type = "NONE";
    path = "/";
    export_id = 1;
    transports = "UDP", "TCP";
    protocols = 4;
}

I get the following error message:
....
15/01/2021 12:47:30 : epoch 600180d2 : nfsshares-a : ganesha.nfsd-21185[main] register_callbacks :FSAL :WARN :This libcephfs does not support registering callbacks. Ganesha will be unable to respond to MDS cache pressure.
15/01/2021 12:47:30 : epoch 600180d2 : nfsshares-a : ganesha.nfsd-21185[main] select_filesystem :FSAL :CRIT :This libcephfs version doesn't support named filesystems.
15/01/2021 12:47:30 : epoch 600180d2 : nfsshares-a : ganesha.nfsd-21185[main] mdcache_fsal_create_export :FSAL :MAJ :Failed to call create_export on underlying FSAL Ceph
15/01/2021 12:47:30 : epoch 600180d2 : nfsshares-a : ganesha.nfsd-21185[main] fsal_cfg_commit :CONFIG :CRIT :Could not create export for (/) to (/)
15/01/2021 12:47:30 : epoch 600180d2 : nfsshares-a : ganesha.nfsd-21185[main] main :NFS STARTUP :WARN :No export entries found in configuration file !!!
15/01/2021 12:47:30 : epoch 600180d2 : nfsshares-a : ganesha.nfsd-21185[main] config_errs_to_log :CONFIG :CRIT :Config File ("rados://nfs-ganesha/ganesha-namespace/export-1":2): 1 validation errors in block FSAL
15/01/2021 12:47:30 : epoch 600180d2 : nfsshares-a : ganesha.nfsd-21185[main] config_errs_to_log :CONFIG :CRIT :Config File ("rados://nfs-ganesha/ganesha-namespace/export-1":2): Errors processing block (FSAL)
15/01/2021 12:47:30 : epoch 600180d2 : nfsshares-a : ganesha.nfsd-21185[main] config_errs_to_log :CONFIG :CRIT :Config File ("rados://nfs-ganesha/ganesha-namespace/export-1":1): 1 validation errors in block EXPORT
15/01/2021 12:47:30 : epoch 600180d2 : nfsshares-a : ganesha.nfsd-21185[main] config_errs_to_log :CONFIG :CRIT :Config File ("rados://nfs-ganesha/ganesha-namespace/export-1":1): Errors processing block (EXPORT)
....

When I remove 
filesystem = "cephfs";
in export-1 it works.

I believe my dashboard does not work together with its version or configuration of the libcephfs2 (both same source and version).

Or did I misconfigure something here?

Best regards and a healthy new year!
Rainer

[NFS-Ganesha-Support] FSAL :CRIT :This libcephfs version doesn't support named filesystems

rainer.stumbaum＠gmail.com