[Users] add NFS storage domain fails on mount timeout via ovirt

[Joop]

Einav Cohen wrote:
> Hi, 
>
> When trying to add an NFS Export domain via oVirt-engine, it fails on 
> "Problem while trying to mount target". 
> when checking the vdsm.log, it seems that the problem is mount time-out. 
>
> when I tried to manually run the mount command, in the exact same manner 
> as vdsm, it indeed failed on Connection timed out after ~3 minutes or so: 
>
> [root at localhost vdsm]# /usr/bin/mount -t nfs -o soft,nosharecache,timeo=600,retrans=6,nfsvers=3 1.2.3.4:/home/ecohen/public/export/engine/storage/195/iscsi-dc/export /rhev/data-center/mnt/11.2.3.4:_home_ecohen_public_export_engine_storage_195_iscsi-dc_export 
> mount.nfs: Connection timed out 
>
> but - when trying to run the mount command again, with the exact same mount 
> source and mount target, but without any additional parameter, it succeeded 
> (after ~10 seconds): 
> [root at localhost vdsm]# /usr/bin/mount 10.18.57.137:/home/ecohen/public/export/engine/storage/195/iscsi-dc/export /rhev/data-center/mnt/10.18.57.137:_home_ecohen_public_export_engine_storage_195_iscsi-dc_export 
>
>   
My guesss its NFSv3 vs NFSv4

Joop