#!/bin/bash

# Tries manually restarting dbgov if not running, error after retries hit SYSENG-20225

nagios_cache_file="/var/tmp/$(basename $0)"
nagios_cache_age=900

# cacheage function
nagios_cacheage() {
  file=$1
  now=$(date +%s)
  mtime=$(stat -c %Y "$file")
  delta=$(( now - mtime ))
  echo $delta
}

nagios_generate_cache() {
  RETRIES=2

  while [[ "${RETRIES}" -gt 0 ]]; do
    if $(echo $(dbctl list) | grep -wq "can't connect to socket"); then
      RETRIES="$((RETRIES -1))"
      systemctl restart db_governor
      sleep 15
    else
      break
    fi
  done

  if [ "${RETRIES}" -eq 0 ]; then
    echo "dbgov_check - db-governor is not running and can't be started"
    echo "exit_code = 2"
  else
    echo "dbgov_check - is running"
    echo "exit_code = 0"
  fi
}

if [ ! -e "${nagios_cache_file}" ]; then
  touch ${nagios_cache_file}
  nagios_generate_cache > "${nagios_cache_file}"
else
  cache_age=$(nagios_cacheage ${nagios_cache_file})
  if [ "${cache_age}" -ge "${nagios_cache_age}" ]; then
    nagios_generate_cache > "${nagios_cache_file}"
  fi
fi

if [ -s "${nagios_cache_file}" ]; then
  cat "${nagios_cache_file}" | grep -v "exit_code = "
  if grep -q "exit_code = 0" "${nagios_cache_file}"; then
    exit 0
  else
    exit 2
  fi
fi