1. set up resource group and resources on 2-node cluster
2. install clustersoftware on third node
3. add third node to cluster
claccess allow -h 'new-node'
4. change quorum
clq add 'new quorum device'
clq disable 'old quorum device'
clq remove 'old quorum device'
5. setup node 3 for resource group
make sure the resourcetype package is installed
and the scripts are there
clrg add-node -n 'new-node' 'resource-group'
clrg switch -n
---------------------
6. remove node from resource group
clrg remove-node -n 'nodename' 'resource-group'
Problem: To remove node from cluster you have to remove the
quorumdevice and the interconnect cabling.
Going from a 3-node to a 2-node cluster without
quorumdevice is not possible.
Workaround: add bogusnode.
scconf -a -h bogusnode
7. remove quorumdevice
clq remove 'quorumdevice'
8. remove cabling from third node
remove both interconnect cables using the following commands:
clintr disable 'node:interface,switchname@portnumber'
clinter remove 'node:interface,switchname@portnumber'
9. remove the node
scconf -r -h 'node'
10. add quorumdevice
clq add 'globaldev'
scconf -r -h 'bogusnode'