Re: How to make nfs v3 work? nfs-ganesha for cephfs

Youzhong Yang <youzhong@xxxxxxxxx> · Wed, 27 Jun 2018 09:54:23 -0400

Thank you Paul. mount_path_pseudo does the trick.
Now nfs v3 works on Linux, but on MAC OS, it mounts successfully, with empty folder:

bat8485maci:~ root# mount -t nfs -o vers=3 ceph-admin:/ceph /mnt/ceph
bat8485maci:~ root# ls -l /mnt/ceph/
bat8485maci:~ root#

This is how it looks like on Linux:

root@yyang-deb9-64:~# mount -t nfs ceph-admin:/ceph /mnt/ceph
mount.nfs: requested NFS version or transport protocol is not supported
root@yyang-deb9-64:~# mount -t nfs -o vers=3 ceph-admin:/ceph /mnt/ceph
root@yyang-deb9-64:~# ls -l /mnt/ceph/
total 2
drwxr-xr-x 3 root     root  8566720930 Jun 27 08:32 Btnas1_stage
drwxr-xr-x 3 root     root  2776623737 Jun 27 08:37 Btnas2_stage
drwxr-xr-x 6 batserve users     456266 Jun 25 21:30 include
drwxrwxrwx 2 root     root           0 Jun 27 08:32 scratch

Is this a MAC OS nfs bug? or an nfs-ganesha issue? By the way, my /etc/ganesha/ganesha.conf is as below:

EXPORT_DEFAULTS
{
        SecType = sys;
        Protocols = 3;
}
NFS_CORE_PARAM
{
        Enable_NLM = false;
        Enable_RQUOTA = false;
        Protocols = 3;
        mount_path_pseudo = true;
}
CACHEINODE {
        Dir_Chunk = 0;
        NParts = 1;
        Cache_Size = 1;
}
EXPORT
{
        Export_ID=100;
        Protocols = 3;
        Transports = TCP,UDP;
        Path = /;
        Pseudo = /ceph;
        Tag = ceph;
        Access_Type = RW;
        Attr_Expiration_Time = 0;
        Squash = None;
        FSAL {
                Name = CEPH;
        }
}

Thanks,

--Youzhong

On Wed, Jun 27, 2018 at 2:55 AM, Paul Emmerich <paul.emmerich@xxxxxxxx> wrote:
NFS3 does not use pseudo paths usually. You can enable
the Mount_Path_Pseudo option in NFS_CORE_PARAM to
enable usage of pseudo fsal for NFS3 clients. (Note that
the NFS3 clients cannot mount the pseudo root itself, but
only subdirectories due to limitations in the inode size)

Paul

2018-06-26 18:13 GMT+02:00 Youzhong Yang <youzhong@xxxxxxxxx>:
NFS v4 works like a charm, no issue for Linux clients, but when trying to mount on MAC OS X client, it doesn't work - likely due to 'mountd' not registered in rpc by ganesha when it comes to v4.
So I tried to set up v3, no luck:

# mount -t nfs -o rw,noatime,vers=3 ceph-dev:/ceph /mnt/ceph
mount.nfs: access denied by server while mounting ceph-dev:/ceph

/var/log/ganesha/ganesha.log says:

mnt_Mnt :NFS3 :INFO :MOUNT: Export entry / does not support NFS v3 for client ::ffff:172.21.24.38

My /etc/ganesha/ganesha.conf looks like this:

EXPORT
{
        Export_ID=100;
        Protocols = 3;
        Transports = TCP;
        Path = /ceph;
        Tag = ceph;
        Pseudo = /ceph;
        Access_Type = RW;
        Squash = None;
        FSAL {
                Name = CEPH;
        }
}

Any way to make it work? Thanks in advance.

--Youzhong

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-- 
Paul Emmerich

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