pacemaker/corosync alert helper

ckuster_alert_helper.sh

#!/bin/bash

log_file="/var/log/hacluster/alerts.log"
flags_dir="/var/lib/hacluster"

echo "--[${CRM_alert_timestamp}]--" >> ${log_file}.debug
env | grep "CRM_alert" >> ${log_file}.debug
echo "----" >> ${log_file}.debug

function to_log()
{
  what=$1
  echo "[${CRM_alert_timestamp}] ${what}" >> ${log_file}
}

function execute()
{
  command=$1
  to_log "Executing [${command}]: "
  { time $command ; } >> ${log_file} 2>&1
  to_log "Executing done"
}

function set_flag()
{
  flag=$1
  touch ${flags_dir}/${flag}
}

function remove_flag()
{
  flag=$1
  rm -f ${flags_dir}/${flag}
}

function flag_exists()
{
  flag=$1
  if [ -f "${flags_dir}/${flag}" ]
  then
    return 0
  fi
  return 1
}

function process_kinds()
{
  case ${CRM_alert_kind} in
    "node")
      process_kind_node
      ;;
    "resource")
      process_kind_resource
      ;;
  esac
}

function process_kind_node()
{
  to_log "Node '${CRM_alert_node}' is now '${CRM_alert_desc}'"
}

function process_kind_resource()
{
  case ${CRM_alert_rsc} in
    "p_postgresql")
      process_p_postgresql_tasks
      ;;
  esac
}

function process_p_postgresql_tasks()
{
  case ${CRM_alert_task} in
    "monitor")
      case ${CRM_alert_desc} in
        "Cancelled") ;;
        "not running"|"unknown error")
            set_flag "postgresql_not_running"
            to_log "PostgreSQL not running on '${CRM_alert_node}'. Ressurect sheduled."
          ;;
      esac
      ;;
    "stop")
      if flag_exists "postgresql_not_running"
      then
        to_log "Ressurect PostgreSQL on '${CRM_alert_node}'."
        execute "pcs resource cleanup p_postgresql --node=${CRM_alert_node}"
        remove_flag "postgresql_not_running"
      fi
      ;;
  esac
}

process_kinds