Nagios 里面监控MySQL 监控事务夯住（RUNNING）报警通知

序言：
        业务报警订单提交异常，页面一直没有反应，排查后是事务没有提交或者回滚导致，想到如果及时监控事务的运行状态报警出来，那么就可以及时排查出问题所在，方便运营处理，所以自己就弄了一个shell脚本放在nagios来处理事务报警情况。

1,编写事务监控脚本 
#!/bin/bash
# author: tim.man
# version: 1.0
# desc: check the RUNNING TRANSACTION over 


ST_OK=0  
ST_WR=1  
ST_CR=2  
ST_UK=3 


TIME_TRX=10


# 提示信息
print_help() {  
    echo "$PROGNAME -w INT -c INT"  
    echo "Options:"  
    echo "  -w/--warning)"  
    echo "     Sets a warning number"  
    echo "  -c/--critical)"  
    echo "     Sets a critical level for io"  
    exit $ST_UK  
}


while test -n "$1"; do  
    case "$1" in  
        -help|-h)  
            print_help  
            exit $ST_UK  
            ;;  
        --warning|-w)  
            warning=$2  
        shift  
            ;;  
        --critical|-c)  
            critical=$2  
        shift  
            ;;  
        *)  
            echo "Unknown argument: $1"  
            print_help  
            exit $ST_UK  
            ;;  
        esac  
    shift  
done  




get_wcdiff() {  
    if [ ! -z "$warning" -a ! -z "$critical" ]  
    then  
        wclvls=1  
  
        if [ ${warning} -gt ${critical} ]  
        then  
            wcdiff=1  
        fi  
    elif [ ! -z "$warning" -a -z "$critical" ]  
    then  
        wcdiff=2  
    elif [ -z "$warning" -a ! -z "$critical" ]  
    then  
        wcdiff=3  
    fi  
}  


# 脚本判断
val_wcdiff() {  
    if [ "$wcdiff" = 1 ]  
    then  
        echo "Please adjust your warning/critical thresholds. The warning must be lower than the critical level!"  
        exit $ST_UK  
    elif [ "$wcdiff" = 2 ]  
    then  
        echo "Please also set a critical value when you want to use warning/critical thresholds!"  
        exit $ST_UK  
    elif [ "$wcdiff" = 3 ]  
    then  
        echo "Please also set a warning value when you want to use warning/critical thresholds!"  
        exit $ST_UK  
    fi  
}  


get_wcdiff  
val_wcdiff  


# 统计mysql的事务中最大运行时间
max_over_time=`/usr/local/mysql/bin/mysql --user=nagios --password="nagiosq@xxx"  -NS /usr/local/mysql/mysql.sock -e "SELECT TIME_TO_SEC(TIMEDIFF(NOW(),t.trx_started)) FROM information_schem
a.INNODB_TRX t WHERE TIME_TO_SEC(TIMEDIFF(NOW(),t.trx_started))>$TIME_TRX ORDER BY TIME_TO_SEC(TIMEDIFF(NOW(),t.trx_started)) DESC LIMIT 1;" |awk '{print $1}'`


# 如果当前没有RUNNING的事务，则直接赋值为0，以免下面if判断出错
if [ ! -n "$max_over_time" ];then max_over_time=0 
fi


# 取得当前所以阻塞的事务数量
num_trx=`/usr/local/mysql/bin/mysql --user=nagios --password="nagiosq@xxx"  -NS /usr/local/mysql/mysql.sock -e "SELECT COUNT(1) FROM information_schema.INNODB_TRX t WHERE TIME_TO_SEC(TIMEDIF
F(NOW(),t.trx_started))>$TIME_TRX;" |awk '{print $1}'`


if [ -n "$warning" -a -n "$critical" ]  
then  
    if [ `expr $max_over_time \> $warning` -eq 1 -a `expr  $max_over_time \< $critical` -eq 1 ]  
    then  
        echo "WARNING - $num_trx TRANSACTIONS RUNNING,go over for $max_over_time seconds"  
        exit $ST_WR  
    elif [ `expr $max_over_time \> $critical` -eq 1 ]  
    then  
        echo "CRITICAL- $num_trx TRANSACTIONS RUNNNING,go over for $max_over_time seconds"  
        exit $ST_CR  
    else  
        echo "OK- TRANSACTIONS RAN successfully."  
        exit $ST_OK  
    fi  
fi


2，在nagios客户端添加脚本监控
先测试下脚本
[root@wgq_idc_dbm_3_61 binlog]# /usr/local/nagios/libexec/check_trx -w 30 -c 60
Warning: Using a password on the command line interface can be insecure.
Warning: Using a password on the command line interface can be insecure.
OK- TRANSACTIONS RAN successfully.
[root@wgq_idc_dbm_3_61 binlog]#
在nrpe.cfg里面添加监控命令
[root@wgq_idc_dbm_3_61 binlog]# vim /usr/local/nagios/etc/nrpe.cfg
command[check_mysql_trx]=/usr/local/nagios/libexec/check_trx -w 30 -c 60

之后重启nagios客户端监控, service nrpe restart




4,在nagios主监控服务器上面添加配置选项
先去nagios服务器上面check一下
[root@localhost etc]# /usr/local/nagios/libexec/check_nrpe -H10.254.3.61 -c check_mysql_trx
OK- TRANSACTIONS RAN successfully.
[root@localhost etc]# 


在services.cfg里面添加事务监控选项：
define service{
        host_name               mysqlserver
        service_description     Check mysql transctions
        check_command           check_nrpe!check_mysql_trx
        max_check_attempts      5
        check_command           check_nrpe!check_mysql_trx
        max_check_attempts      5
        normal_check_interval   3
        retry_check_interval    2
        check_period            24x7
        notification_interval   10
        notification_period     24x7
        notification_options    w,u,c,r
        contact_groups          opsweb
        }

在commands.cnf里面添加事务监控命令：
# add by tim.man on 20141201
define command{
        command_name    check_mysql_trx
        command_line    $USER1$/check_mysql_trx -w $ARG1$ -c $ARG2$
        }

邮件短信报警电话报警已经添加，所以无需重新配置。

然后重新加载nagios
[root@localhost objects]# service nagios reload
Running configuration check...
Reloading nagios configuration...
done
[root@localhost objects]# 



5，去nagios主监控界面查看监控效果
正常监控效果：



严重监控效果：


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原博客地址：   http://blog.itpub.net/26230597/viewspace-1355720/
原作者：黄杉 (mchdba)
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