ovs-hostnames

#!/usr/bin/env bash

if oc auth can-i exec pod -n openshift-ovn-kubernetes > /dev/null 2>&1 && oc get ns openshift-ovn-kubernetes > /dev/null 2>&1; then
  OVSHOSTNAMES=$(oc -n openshift-ovn-kubernetes exec pod/"$(oc -n openshift-ovn-kubernetes get pod -l app=ovnkube-master,component=network -o jsonpath='{.items[0].metadata.name}')" -c northd -- ovn-sbctl --no-leader-only list chassis | awk '/hostname/ { print $3 }' | sort -n)
  if [ -n "${OVSHOSTNAMES}" ]; then
    msg "OVS hostnames:\n${OVSHOSTNAMES}"
  else
    msg "Couldn't get ovs-hostnames, check permissions" 
  fi
else
  msg "Couldn't get ovs-hostnames, either the cluster is not using OVN, or the running user has insufficient permissions" 
fi