#!/bin/bash
source /etc/profile

BASE_DIR={{ deploy_dir }}

VERSION={{ hadoop_version }}

function set_log(){
RES_SUM_FILE=$BASE_DIR/$VERSION/logs

if [ ! -f "$RES_SUM_FILE/" ]
then
  mkdir -p $RES_SUM_FILE
fi

if [ ! -d "$RES_SUM_FILE/$1" ];then
  echo "0" > $RES_SUM_FILE/$1
fi

OLD_NUM=`cat $RES_SUM_FILE/$1`
RESTART_NUM=`expr $OLD_NUM + 1`
echo $RESTART_NUM > $RES_SUM_FILE/$1
if [ $OLD_NUM -eq "0" ];then
  echo "`date "+%Y-%m-%d %H:%M:%S"` - Yarn $2服务初次启动" >> $BASE_DIR/$VERSION/logs/restart.log
else
  echo "`date +%Y-%m-%d` `date +%H:%M:%S` - Yarn $2服务异常 - 重启次数 -> $RESTART_NUM." >> $BASE_DIR/$VERSION/logs/restart.log
fi
}


while true ; do

HAS_HISTORY=`ps -ef | grep "org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer" | grep -v grep | wc -l`

if [ $HAS_HISTORY -eq "0" ];then
  $BASE_DIR/$VERSION/sbin/mr-jobhistory-daemon.sh start historyserver > /dev/null
  set_log nmRes_sum JobHistoryServer
fi

sleep 60
done