=====RedHat Troubleshooting links=====

====Cluster Issues====

These links were provided to help setup and troubleshoot our cluster

Used to define extra resources

[[ https://access.redhat.com/solutions/189823 | Where can I find resources to help me create a custom resource agent scripts for Red Hat High Availability clusters?]] 


[[https://access.redhat.com/solutions/271703 | What are the requirements of a "script" resource in Red Hat Enterprise Linux Clusters?]]


[[https://access.redhat.com/solutions/1296573 | 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? ]]


[[https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html-single/High_Availability_Add-On_Reference/#tb-resource-operation-HAAR |Please refer below document to know on-fails options ]]

[[https://access.redhat.com/articles/2059253 | 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.

[[https://access.redhat.com/solutions/2039493 | Installing the RHEL High Availability Add On "offline"]]
 
====Hardware issue====

Issue had when motherboard was replaced

[[https://access.redhat.com/solutions/1519143 | Unable to boot after a system board change on UEFI systems]]

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

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