ovn-pods-memory-usage

#!/usr/bin/env bash
# description: Checks if the memory usage of the OVN pods is under the LIMIT threshold

[ -z ${UTILSFILE} ] && source $(echo "$(dirname ${0})/../utils")

error=false

if oc auth can-i adm top -A >/dev/null 2>&1; then
  LIMIT="${OVN_MEMORY_LIMIT:=5000}"
  FLAG=0
  pods_memory_usage=$(oc adm top pod -n openshift-ovn-kubernetes -l app=ovnkube-node --no-headers | awk '{ print $1 " " $3 }' | awk '{$2 = substr($2,0,length($2)-2)}  1')
  MESSAGE=""

  OLDIFS=${IFS}
  IFS=$'\n'
  for pod_line in ${pods_memory_usage}; do
    pod_name=$(echo $pod_line | awk '{ print $1 }')
    pod_size=$(echo $pod_line | awk '{ print $2 }')
    if [[ ${pod_size} -ge ${LIMIT} ]]; then
      MESSAGE="${MESSAGE}The OVN pod memory usage for ${pod_name} is extremely high: ${RED}${pod_size}${NOCOLOR}Mi\n"
      FLAG=1
    fi
  done
  IFS=${OLDIFS}

  if [[ ${FLAG} -ne 0 ]]; then
    MESSAGE="${MESSAGE}For more information you can check the KCS https://access.redhat.com/solutions/6493321\n"
    msg "${MESSAGE}"
    errors=$(("${errors}" + 1))
    error=true
  fi

  if [ ! -z "${ERRORFILE}" ]; then
    echo $errors >${ERRORFILE}
  fi

  if [[ $error == true ]]; then
    exit ${OCERROR}
  else
    exit ${OCOK}
  fi
else
  msg "Couldn't adm top pods, check permissions"
  exit ${OCSKIP}
fi
exit ${OCUNKNOWNN}