Hi,

I am trying to setup a 6 node Redhat HA cluster for Resilient storage and I am confused of the number of fencing devices and the type. My environment is as below

Using VMware VMs with vCenter
Number of nodes 6
OS Redhat 7.9

I am stuck at creating fencing devices.

1. Do I need to create a fencing device for each node or do I need to share one fencing device across all 6 nodes.
2. What method would be the best for resilient storage (GFS2)

Thank you and Kind Regards

Hi All

It seems you can just create one fence device with semicolon separated list of "pacemaker_nodename:node-vm as below

# pcs stonith create vmfence01 fence_vmware_soap pcmk_host_map="<pacemaker_nodename1:node1-vm;pacemaker_nodename2:node2-vm>" ipaddr=<ESXi/vCenter IP address> ssl_insecure=1 login=<Vcenter/vSpher login> passwd=<vCenter/vSpher password> delay=10

You can get the node-vm name by using below command

# fence_vmware_soap -a <ESXi/vCenter IP address> -l <Vcenter/vSpher login> -p <vCenter/vSpher password> --ssl-insecure -o list | egrep '(node2-vm|node*-vm)'

Correct me if I am wrong or there is any additional things that I need to do like creating second stonith device as below and assign a constrain to each to avoid the chance of cluster trying to start both services on the same node

# pcs stonith create vmfence fence_vmware_soap pcmk_host_map="<pacemaker_nodename1:node1-vm;pacemaker_nodename2:node2-vm>" ipaddr=<ESXi/vCenter IP address> ssl_insecure=1 login=<Vcenter/vSpher login> passwd=<vCenter/vSpher password> delay=10

Thank you and Kind Regards