=====Clusterring Documentation===== ====Links that I used initially==== [[https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/high_availability_add-on_administration/ch-startup-haaa| Here are instructions on how to set up a 2 node cluster running Linux with Pacemaker and Corosync]] [[https://access.redhat.com/solutions/917813 | How to set up Fencing for a RHEL Cluster using fence_vmware_soap]] [[https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html-single/High_Availability_Add-On_Administration/index.html#s1-clusterconfigure-HAAA | High Availability Add-On Administration]] ====Links Given to me by Redhat==== [[https://access.redhat.com/solutions/1296573 | Configuring Pacemaker to ignore a resource failure ]] [[https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html-single/High_Availability_Add-On_Reference/#tb-resource-operation-HAAR |Known on fails options ]] [[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/16657 | Force a node to failover]] Command is # pcs stonith confirm =====command Line Reference links===== [[https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/pdf/High_Availability_Add-On_Reference/Red_Hat_Enterprise_Linux-7-High_Availability_Add-On_Reference-en-US.pdf | Good PDF with commands for HA]] [[https://access.redhat.com/solutions/1235473| help with Stonith]] help with services not starting quorum unblock (not working anymore as we have this set in corosync.conf) https://access.redhat.com/solutions/1235473 THis option works better now pcs resource cleanup then run pcs quorum unblock =====Cluster commands===== good commands to monitor actions on the cluster **crm_mon** usefull to monitor failovers =====Cluster patching Document from redhat===== [[https://access.redhat.com/articles/2059253?band=se&seSessionId=b348b668-1d9f-43db-8eba-f54458b3e949&seSource=Recommendation%20Aside&seResourceOriginID=| how to patch a cluster]]