I have 2 RHEL5.4 systems connected by a network.
I start nfs server on one (fill /etc/exports , exportfs -ra, service nfs start, portmpa is up) and the client is on the other . I can mount the exported
directory on the client and work there .
Now the RH54 kernel is 2.6.18 . I now installed on the server side a new compiled kernel 2.6.30 because I need kvm . I do not use kvm yet just work at the host level.
I compiled the new kernel with same NFS flags as in the original RH kernel i.e same .config CONFIG_NFS_* values working with the make oldconfig as needed . Then rebooted the system and performed on the server side same operations as did first time to start the nfs server (/etc/exports is there , exportfs -ra, service nfs start . portmap is up there at boot) .
This time a mount request for the nfs directory on the client machine
returned an error : failed, reason given by server: Permission denied
I am working as root on both the client and server. The /var/log/messages
does not show any error just that nfs is up and "authenticated mount request from <client ip> for /export/dir" as in the succesful case .
In both cases /proc/fs/nfs/exports shows the right info (exort dir .. <IP>)
/var/lib/nfs/xtab is EMPTY in both cases (good and bad) ?!
/etc/host is holding the correct clinet and its hostname .
The only diff I find is that in the original RH kernel case , after mount is ok
issuing "dmesg | grep nfs" gives diffrent info than in the bad mount
as follows:
I am wondering if this is NFS V4 related, if you do not require the speed/security enhancements of NFS V4 you could try getting both ends to use NFS V3 instead.
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