Redhat Pacemaker Cluster HA NFS Configuration In RHEL7-Part-6

This video is to demonstrate how to configure NFS HA cluster in Redhat Enterprise Linux 7 running pacemaker cluster stack. A step by step procedure to configure NFS server running in pacemaker cluster and testing failover fallback test for NFS resource.
Please watch other related pacemaker cluster videos in given below links:
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[@victorsina]

Hi. Excelent... But, you forget to add the constraint order for nfs service ip and nfs filesystems. I see them in your notes, in the video..

[@gauthierdelerce7863]

Hi,
Thanks for your tutorial, I'm wondering if your failover test is relevant; when you move the nfs resource group you should have IO in progress from the client in order to validate your setup.
Hint : If you see IO errors during the failover you could move the IPaddr2 ressources after the nfsserver in your nfs group ( as described in rhel official documentation ).

[@mohdtafseer6446]

Hi Can you share the procedure how to add third node in existing running two node HA cluster and how to delete third node as well,

[@shankarbuddhi1941]

how to get the details of primitive services...if i want to setup samba service how will i know what are the primitive/ dependent services to be set ...

[@arunkumarnie]

Hi,
I just wanted to know is stonith device/resource is must for creating NFS HA?

[@tunetolinux4173]

Fencing is mandatory when it comes to clustering. You can configure cluster without fencing BUT it would be no of using cluster.

[@tunetolinux4173]

Fencing is nothing but a dis-connector to avoid inconsistency of data. Since we use shared LUN in cluster we don't need data inconsistency when if one node in the cluster hung or not responding for some reason. If fencing is active and functional, it will disconnect the node from cluster and reboot or shutdown the node to avoid inconsistency. That is why we need Fencing :)

[@shankarbuddhi1941]

can you please let me know what is the use or purpose of nfsinfodir and what sort of info can we get by doing so...

[@tunetolinux4173]

Like OS use /etc/export to check NFS share information. Similarly cluster checks for infodir directory to fetch share information.
Hope this answer your question.

[@MarioYzaguirre899]

Hi, How do you define the stonith devices ..?

[@tunetolinux4173]

Redhat Pacemaker Cluster In RHEL7.2- Configuration Vmware SOAP Fencing-Part 2th-cam.com/video/6UsJ7dve5JE/w-d-xo.html

[@arunkumarnie]

if possible can you update about fence_scsi stonith resource in some video tutorial

[@tunetolinux4173]

It is just a one type of fencing device that can be use in pacemaker cluster. You can run #pcs resource describe fence_scsi to see the example and configure according.