I'm trying to setup a simple NFSv4 mount between two x86_64 hosts. On the server, I have this in /etc/exports:
/export $CLIENT(ro,fsid=0) /export/qb3 $CLIENT(rw,nohide)
ON $CLIENT, I mount via:
mount -t nfs4 $SERVER:/qb3 /usr/local/sge62/qb3
However:
$ touch /usr/local/sge62/qb3/foo touch: cannot touch `/usr/local/sge62/qb3/foo': Read-only file system
I'd really rather not export the pseudo-root read-write, so how do I get this working? Any hints would be appreciated -- thanks.
----- "Joshua Baker-LePain" jlb17@duke.edu wrote:
I'm trying to setup a simple NFSv4 mount between two x86_64 hosts. On the server, I have this in /etc/exports:
/export $CLIENT(ro,fsid=0) /export/qb3 $CLIENT(rw,nohide)
ON $CLIENT, I mount via:
mount -t nfs4 $SERVER:/qb3 /usr/local/sge62/qb3
However:
$ touch /usr/local/sge62/qb3/foo touch: cannot touch `/usr/local/sge62/qb3/foo': Read-only file system
I'd really rather not export the pseudo-root read-write, so how do I get this working? Any hints would be appreciated -- thanks.
Your export:
/export/qb3 $CLIENT(rw,nohide)
And your mount:
mount -t nfs4 $SERVER:/qb3 /usr/local/sge62/qb3
The remote path is wrong. Either that's a typo or could be the cause of your problem?
--Tim
On Wed, 18 Nov 2009 at 4:05pm, Tim Nelson wrote
----- "Joshua Baker-LePain" jlb17@duke.edu wrote:
/export $CLIENT(ro,fsid=0) /export/qb3 $CLIENT(rw,nohide)
Your export:
/export/qb3 $CLIENT(rw,nohide)
And your mount:
mount -t nfs4 $SERVER:/qb3 /usr/local/sge62/qb3
The remote path is wrong. Either that's a typo or could be the cause of your problem?
No, that's how NFSv4 mounts work -- it's relative to the pseudo-root (the fsid=0 entry) on the server. And the mount succeeds. But it's a read-only mount, where it should be rw.
On Wed, Nov 18, 2009 at 5:18 PM, Joshua Baker-LePain jlb17@duke.edu wrote:
On Wed, 18 Nov 2009 at 4:05pm, Tim Nelson wrote
----- "Joshua Baker-LePain" jlb17@duke.edu wrote:
/export $CLIENT(ro,fsid=0) /export/qb3 $CLIENT(rw,nohide)
Your export:
/export/qb3 $CLIENT(rw,nohide)
And your mount:
mount -t nfs4 $SERVER:/qb3 /usr/local/sge62/qb3
The remote path is wrong. Either that's a typo or could be the cause of your problem?
No, that's how NFSv4 mounts work -- it's relative to the pseudo-root (the fsid=0 entry) on the server. And the mount succeeds. But it's a read-only mount, where it should be rw.
Not sure if this applies in your FS4 setup, but most of my NFS permissions errors have stemmed from user ID mismatches on the host server. My NFS4 mounts are not using any true NFS4 features, however.
On Thu, 19 Nov 2009 at 9:21am, Kwan Lowe wrote
Not sure if this applies in your FS4 setup, but most of my NFS permissions errors have stemmed from user ID mismatches on the host server. My NFS4 mounts are not using any true NFS4 features, however.
My problem isn't a permissions issue -- it's the fact that the mount on the client is read-only. And NFS4 doesn't rely on numerical UID/GID matching anymore. It uses the username string (via rpc.idmapd). In any case, both the usernames and UIDs/GIDs match on these two systems.
On Wed, 18 Nov 2009 at 5:05pm, Joshua Baker-LePain wrote
I'm trying to setup a simple NFSv4 mount between two x86_64 hosts. On the server, I have this in /etc/exports:
/export $CLIENT(ro,fsid=0) /export/qb3 $CLIENT(rw,nohide)
ON $CLIENT, I mount via:
mount -t nfs4 $SERVER:/qb3 /usr/local/sge62/qb3
However:
$ touch /usr/local/sge62/qb3/foo touch: cannot touch `/usr/local/sge62/qb3/foo': Read-only file system
I'd really rather not export the pseudo-root read-write, so how do I get this working? Any hints would be appreciated -- thanks.
For the archives, my issue was that qb3 was on the /export filesystem. I instead mounted the filesystem at /export/qb3, and then the above setup worked.
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Joshua Baker-LePain -
Kwan Lowe -
Tim Nelson