Two shared NFS shares in RHEL6, one is not getting mounted as NFSv4.

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 6

Issue

  • Two NFS shares are shared in RHEL6 as
/home/test123/apps/resources *(rw,insecure,no_root_squash,no_subtree_check,async)
/data *(rw,insecure,no_root_squash,no_subtree_check,async)

First share on the client side gives error while mounting

# mount 10.0.11.148:/home/test123/apps/resources /home/test123/apps/resources
mount.nfs: access denied by server while mounting 10.0.11.148:/home/test123/apps/resources  <----

Second share can be mounted correctly

# cat /proc/mounts |grep nfs
sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw,relatime 0 0
nfsd /proc/fs/nfsd nfsd rw,relatime 0 0
10.0.11.148:/data/ /datafiles nfs4 rw,relatime,vers=4,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=10.0.11.149,minorversion=0,local_lock=none,addr=10.0.11.148 0 0

First share can be mounted as nfsv3 successfully

#mount -t nfs -o nfsvers=3 10.0.11.148:/home/test123/apps/resources     /home/test123/apps/resources

Resolution

[1] Change the /etc/exports entries as given below

      /home 10.0.11.149(rw,async,wdelay,insecure,no_root_squash,no_subtree_check,fsid=1)      
      /data 10.0.11.149(rw,async,wdelay,insecure,no_root_squash,no_subtree_check,fsid=2)

[2] Re-export all directories using below command.

      # exportfs -r
      # exportfs -v         <== Ensure that all option are reflecting.

[3] Unmount the shares in client and mount it again.

      # umount /home/test123/apps/resources; umount /data
      # mount 10.0.11.148:/home/test123/apps/resources /home/test123/apps/resources
      # mount 10.0.11.148:/data /data

[4] Check the mounted filesystem details.

      # grep 10.0.11.148 /proc/mounts

It should show similar to as seen below

10.0.11.148:/home/test123/apps/resources /home/test123/apps/resources nfs4 rw,relatime,vers=4,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=10.0.11.149,minorversion=0,local_lock=none,addr=10.0.11.148 0 0
10.0.11.148:/data/ /data nfs4 rw,relatime,vers=4,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=10.0.11.149,minorversion=0,local_lock=none,addr=10.0.11.148 0 0

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