These links were provided to help setup and troubleshoot our cluster

Used to define extra resources

Where can I find resources to help me create a custom resource agent scripts for Red Hat High Availability clusters?

What are the requirements of a "script" resource in Red Hat Enterprise Linux Clusters?

Can I configure pacemaker to ignore a resource operation failure and do nothing in response to it in a RHEL 6 or 7 High Availability cluster?

Please refer below document to know on-fails options

Procedure for Patching Cluster nodes

References for installing cluster offline (suitable for our scenario – update as well), if you need it: [1]. Please make sure the cluster is off completely or follow the aforementioned article [2]. So that the cluster doesn't end up in an inconsistent state.

Installing the RHEL High Availability Add On "offline"

Issue had when motherboard was replaced

Unable to boot after a system board change on UEFI systems

commmand used by Oralce to recreate the ramdisk from within rescue mode

dracut -f /boot/initramfs-4.1.12-124.35.2.el6uek.x86_64.img 4.1.12-124.35.2.el6uek.x86_64 -v