shutdown.sh

#!/usr/bin/env bash
# RedHat recommendation is 10 minuter for large clusters with 10 nodes or more.
# Therefore, for production clusters, set SECONDS_AFTER_WORKERS to 600.
# https://docs.openshift.com/container-platform/4.8/backup_and_restore/graceful-cluster-shutdown.html
MINUTES_TO_SHUTDOWN=${MINUTES_TO_SHUTDOWN:-0}
SECONDS_AFTER_WORKERS=${SECONDS_AFTER_WORKERS:-180}

certExpire=$(oc -n openshift-kube-apiserver-operator get secret kube-apiserver-to-kubelet-signer -o jsonpath='{.metadata.annotations.auth\.openshift\.io/certificate-not-after}')
echo "Certificates will expire at ${certExpire}"
echo ""

SCRIPT_DIR="$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"

ansible -i "${SCRIPT_DIR}/inventories/example-scos/hosts" workers -m raw -a "/usr/sbin/shutdown ${MINUTES_TO_SHUTDOWN}" --become
echo "Wait ${SECONDS_AFTER_WORKERS} seconds for worker nodes to shutdown first."
sleep "${SECONDS_AFTER_WORKERS}"
ansible -i "${SCRIPT_DIR}/inventories/example-scos/hosts" masters -m raw -a "/usr/sbin/shutdown 1" --become