Following on from my earlier post: -
I discovered that, if I want to mount a NFS share for read/write operations from Mac OS X, I needed to ensure that the NFS server is set up to "enforce" the UID and GID of the owner of the target directory.
In my case, I was trying to write from Eclipse on the Mac to WebSphere Application Server on RHEL, where the WAS file-system ( /opt/IBM/WebSphere etc. ) is "owned" by the user wasadmin.
Thus, I needed to enforce the UID/GID by changing /etc/exports as follows: -
/opt/IBM/WebSphere/AppServer*(rw,all_squash,insecure,anonuid=500,anongid=500)
and then re-export the file-system: -
exportfs -a
and mount the directory from the Mac: -
mount bpm855.uk.ibm.com:/opt/IBM/WebSphere/AppServer ~/nfs/
Without this, I was seeing the following: -
rm: /Users/hayd/nfs/foobar: Permission denied
whenever I tried to write from OS X to RHEL.
In short, it's all because I am writing from the Mac as user hayd to RHEL where that user does NOT exist and, to make it worse, I'm trying to write to a file-system owned by a user, wasadmin, of which the Mac knows nothing.
Adding the anonuid and anongid parameters to the /etc/exports does the trick.
Final point - I also needed to include all_squash as per the above; the combination of that, with the anonuid and anongid were what did the trick ( as I'd already established that I needed insecure as per the previous NFS-related post )