Gluster users - May 2017 - Is there difference when Nfs-Ganesha is unavailable

While I m troubleshooting the failover of Nfs-Ganesha, the failover is
always successful when I shutdown Nfs-Ganesha service online while the OS
is running. However, it always failed when I did a either shutdown -r or
power-reset.

During the failure, the Nfs client was just hung. Like you could not do a
"df" or "ls" of the mount point. The share will eventually
failover to the
remaining expected node usually after 15 - 20 minutes.

Running on Centos7, gluster 3.7.1x, Nfs-Ganesha 2.3.0.x. I currently don't
have the resources to upgrade, but if all of experts here think that's the
only route. I guess I will have to make a case ...

Thanks in advance!
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On 05/10/2017 04:18 AM, ML Wong wrote:
> While I m troubleshooting the failover of Nfs-Ganesha, the failover is
> always successful when I shutdown Nfs-Ganesha service online while the
> OS is running. However, it always failed when I did a either shutdown -r
> or power-reset.
>
> During the failure, the Nfs client was just hung. Like you could not do
> a "df" or "ls" of the mount point. The share will
eventually failover to
> the remaining expected node usually after 15 - 20 minutes.
The time taken by pacemaker/corosync services to determine if a node is 
down is usually longer compared to the service down case. But yes it 
should n't take more than couple of minutes.

Could you please check (may be by constantly querying) on how long it 
takes for the virtual-IP to failover by using either 'pcs status' or
'ip
a' commands. If the IP failover happens quickly but if its just the NFS 
clients taking time to respond, then we have added usage of portblock 
feature to speed up client re-connects post failover. The fixes are 
available (from release-3.9). But before upgrading I suggest to check if 
the delay is with IP failover or client reconnects post failover.

Thanks,
Soumya
>
> Running on Centos7, gluster 3.7.1x, Nfs-Ganesha 2.3.0.x. I currently
> don't have the resources to upgrade, but if all of experts here think
> that's the only route. I guess I will have to make a case ...
>
> Thanks in advance!
>
>
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