A script for monitor zkserver

zkMonitor.sh

#!/bin/bash

log="./zookeeper.out"
if [ -f "$log" ]; then
    # unit(MB)
    size=`du -sm "$log" | grep "$log" | awk '{print $1}'`
    limit=300
    # split log
    if [ $size -gt $limit ]; then
        newlog="zookeeper-`date +%Y%m%d%H%M%S`.log"
        cp $log $newlog
        # delete the splitted log directly
        rm -f $newlog
        cat /dev/null > $log
    fi
fi

# clear hanging zkMonitor
#killpids=`ps -ef | grep zookeeper | egrep "srvr|zkMonitor" | grep -v " $$ " | awk '{printf("kill -9 %d;\n", $2);}' `
#if [ -n "$killpids" ]; then
#    tmpfile="$$.sh"
#    echo "$killpids" > $tmpfile
#    `bash $tmpfile`
#    rm $tmpfile
#fi
ps -ef | grep zookeeper | egrep "srvr|zkMonitor" | grep -v " $$ " | awk '{print $2}' | xargs kill -9 > /dev/null 2>&1

# check zkserver status
result=`./zkServer.sh status`
status=`echo $result | grep "Mode" | awk -F: '{print $2}'`

if [ "$status" != "" ]; then
    echo "zkserver is running, the role:$status"
    # zkserver is running
    exit 0
fi

# zkserver may not work
line=`echo $result | grep "It is probably not running"`
if [ "$line" != "" ]; then
    # check if zkserver process is existed
    count=`ps -ef | grep zookeeper | grep zoo.cfg | wc -l`  
    if [ $count -eq 0 ]; then
        # zk is not running
        echo "start zkserver"
        ./zkServer.sh start
    else
        echo "zkserver is already running...but not work well, try to restart it"
        ps -ef | grep "zoo.cfg" | grep -v grep | awk '{print $2}' | xargs kill -9
        ./zkServer.sh start
    fi
fi