[Gluster-users] Strange - Missing hostname-trigger_ip-1 resources

[ML Wong]

Thanks, Soumya, for giving me a confirmation on the time for the take-over
process. That's very helpful.

The 'showmount' got hung on the destination host while i see ganesha-nfsd
was running.
On that, 1 thing i tried out-of-ordinary was to set a 2nd set of
*cluster_ip for the storage-nodes using 'pcs'.  Meaning, other than the VIP
i have in 'ganesha-ha.conf', i also used 'pcs' to create another set of
VIPs, and thought of using 'constraint colocation' to get both set of VIPs
and NFSd going. Though both set of VIPs did failover to the destination
node, but the ganesha-nfsd was hung at the destination node when the source
node got brought down. I am guessing this setup probably caused the
confusion of nfs-ganesha ... ? Is that a No-No to have more than 1 set of
VIPs for NFS-Ganesha in different subnets?

Any suggestions, and advice will be appreciated.




On Sun, Feb 5, 2017 at 11:50 PM, Soumya Koduri <skoduri at redhat.com> wrote:

>
>
> On 02/04/2017 06:20 AM, ML Wong wrote:
>
>> Thanks so much for your promptly response, Soumya.
>> That helps clearing out one of my questions. I am trying to figure out
>> why NFS service did not failover/pick-up the NFS clients last time when
>> one of our cluster-nodes failed.
>>
>> Though i could see, in corosync.log, a notify got sent to the cluster
>> the failed node, the election, and the IP failover process seems to all
>> be finished with in around minute. However, after the IP failover to the
>> destinated node, i tried to do a "showmount -e localhost" - the command
>> got hung.But, i still see ganesha-nfsd is running in the host.
>>
>
> Is it on destination node? I mean does 'showmount -e localhost' get hung
> on destination node post IP failover.
>
> To your
>
>> expertise, if i understand the process correctly, given that i keep all
>> the default timeout/interval settings for nfs-mon, nfs-grace, the entire
>> IP failover, and NFS service failover process should be completed within
>> 2 minutes. Am i correct?
>>
>
> Thats right.
>
> Thanks,
> Soumya
>
>>
>> Your help is again appreciated.
>>
>> On Thu, Feb 2, 2017 at 11:42 PM, Soumya Koduri <skoduri at redhat.com
>> <mailto:skoduri at redhat.com>> wrote:
>>
>>     Hi,
>>
>>     On 02/03/2017 07:52 AM, ML Wong wrote:
>>
>>         Hello All,
>>         Any pointers will be very-much appreciated. Thanks in advance!
>>
>>         Environment:
>>         Running centOS 7.2.511
>>         Gluster: 3.7.16, with nfs-ganesha on 2.3.0.1 from
>>         centos-gluster37 repo
>>         sha1: cab5df4064e3a31d1d92786d91bd41d91517fba8  ganesha-ha.sh
>>
>>         we have used this set up in 3 different gluster, nfs-ganesha
>>         environment. The cluster got setup when we do 'gluster nfs-ganesha
>>         enable' , and we can serve NFS without issues. And i see all the
>>         resources got created, but not the *hostname*-trigger_ip-1
>>         resources? Is
>>         that normal?
>>
>>
>>     Yes it is normal. With change [1], new resource agent attributes
>>     have been introduced in place of *-trigger_ip-1 to monitor, move the
>>     VIP  and put the cluster in grace. More details are in the change#
>>     commit msg.
>>
>>     Thanks,
>>     Soumya
>>
>>     [1]
>>     https://github.com/gluster/glusterfs/commit/e8121c4afb3680f5
>> 32b450872b5a3ffcb3766a97
>>     <https://github.com/gluster/glusterfs/commit/e8121c4afb3680f
>> 532b450872b5a3ffcb3766a97>
>>
>>         without *hostname*-trigger_ip-1, according to ganesha-ha.sh,
>>         wouldn't it
>>         affect the NFS going into grace, and help to transition the NFS
>>         service
>>         to other member nodes at the times of node-failures? please
>>         correct me
>>         if i misunderstood.
>>
>>         I tried issuing both 'gluster nfs-ganesha enable', and 'bash -x
>>         /usr/libexec/ganesha/ganesha-ha.sh --setup'. In both scenarios,
>>         i still
>>         don't see the *hostname*-trigger_ip-1 got created.
>>
>>         below is my ganesha-ha.conf
>>         HA_NAME="ganesha-ha-01"
>>         HA_VOL_SERVER="vm-fusion1"
>>         HA_CLUSTER_NODES="vm-fusion1,vm-fusion3"
>>         VIP_vm-fusion1="192.168.30.211"
>>         VIP_vm-fusion3="192.168.30.213"
>>
>>
>>
>>
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>>
>>
>>
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