Graceful Shutdown of an Openshift 4 Cluster

This SOP should be followed in the following scenarios:

  • Graceful full shut down of the Openshift 4 cluster is required.

Steps

Prequisite steps: - Follow the SOP for cordoning and draining the nodes. - Follow the SOP for creating an etcd backup.

  1. Connect to the os-control01 host associated with this ENV. Become root sudo su -.

  2. Get a list of the nodes

nodes=$(oc get nodes -o name  | sed -E "s/node\///")
  1. Shutdown the nodes from the administration box associated with the cluster ENV eg production/staging.

for node in ${nodes[@]}; do ssh -i /root/ocp4/ocp-<ENV>/ssh/id_rsa core@$node sudo shutdown -h now; done