shell 实现memcache缓存命中率监控脚本
#!/bin/bash###############################
#检查memcached的命中率
#加载nagios自带utils.sh
###############################
#source /usr/local/nagios/libexec/utils.sh
print_usage()
{
echo "check_memcached -H IP -P port -w warning -c critical"
}
###################
#获取命令行执行参数
###################
if[ $# == 0 ];then
print_usage;
exit;
else
while test -n "$1";do
case "$1" in
-H)
host=$2
shift
;;
-P)
port=$2
shift
;;
-w)
warning=$2
shift
;;
-c)
critical=$2
shift
;;
*)
echo "Unknown argument:$1"
print_usage
exit $STATE_UNKNOWN
;;
esac
shift
done
fi
########################
#function div_f()
#检查参数，返回两个数字比
########################
function div_f()
{
ref=`awk -v num_a=$1 -v num_b=$2 'BEGIN{printf "%0.2f \n",num_a/num_b}'`;
echo $ref;
}
##################
#得到命中率函数
##################
function getMemcachedHits()
{
memcachedinfo=`/usr/local/nagios/libexec/check_tcp -H $host -p $port -E -s 'stats\r\nquit\r\n' -e 'uptime' | tr "\r" "@"`
get_hits=`echo $memcachedinfo | grep -o "@ STAT get_hits *"| awk '{print $4}'`
cmd_get=`echo $memcachedinfo | grep -o "@ STAT cmd_get *"| awk '{print $4}'`
div_f $get_hits $cmd_get;
}
hits=`getMemcachedHits $host $port`;
##################
#得到命中率所在区间
##################
function re_rang()
{
rang=$hits;
interval_a=$critical;
interval_b=$warningl
if [[ $rang < $interval_a ]];then
echo "0";
elif [[ $rang < $interval_b ]];then
echo "1";
elif [[ $rang > $interval_b ]]||[[ $rang == $interval_b ]] ;then
echo "2";
else
return;
fi
}
res=`re_rang $critical $warning $hits`;
case "$res" in
0)
echo "Critical memcached_hits=$hits|memcached_hits=$hits;$warning;$critical;"
exit $STATE_CRITICAL
;;
1)
echo "Warningmemcached_hits=$hits|memcached_hits=$hits;$warning;$critical;"
exit $STATE_WARNING
;;
2)
echo "Okmemcached_hits=$hits|memcached_hits=$hits;$warning;$critical;"
exit $STATE_OK
;;
*)
echo "Unkown"
exit $STATE_UNKNOWN
;;
esac
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