检测MySQL 主从
一、先安装 nrpe，这样可以实现在远程主机上执行命令
nagios主机 192.168.24.1
mysql主机 192.168.24.3
被监控主机
安装nrpe的server端
tar fvxz nrpe*.tar.gz
./configure --prefix=/usr/local/nagios
useradd nagios
make
make install-daemon
make install-daemon-config
make install-xinetd
make install
把插件拷贝给监控主机nagios
scp /usr/local/nagios/libexec/check_nrpe root@192.168.24.1ip:/usr/local/nagios/libexec
在被监控主机开启nrpe服务
vim /etc/xinetd.d/nrpe
# default: on
# description: NRPE (Nagios Remote Plugin Executor)
service nrpe
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{
flags = REUSE
socket_type = stream
port = 5666
wait = no
user = nagios
group = nagios
server = /usr/local/nagios/bin/nrpe
server_args = -c /usr/local/nagios/etc/nrpe.cfg --inetd
log_on_failure += USERID
disable = no
only_from = 192.168.24.1 ＃监控主机的ip，保证他可以连接进来！
}
vim /etc/services
nrpe 5666/tcp
service xinetd restart
在监控主机上测试
[root@server1 objects]# /usr/local/nagios/libexec/check_nrpe -H 192.168.18.188
NRPE v2.12
在被监控主机安装插件
vim /usr/local/nagios/etc/nrpe.cfg
command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
command[check_u]=/usr/local/nagios/libexec/check_users -w 5 -c 10
command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200
通过以上字段来定义命令，以及接收命令后执行的插件，就是可以在远程主机上执行的命令。
定义服务，来检测一下
define host {
host_name mysql-server
alias nrpe-server
address 192.168.24.3
check_command check-host-alive
notification_options d,u,r
check_interval 1
max_check_attempts 2
contact_groups admins
notification_interval 10
notification_period 24x7
}
定义命令
define command {
command_name check_nrpe
command_line /usr/local/nagios/libexec/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
重启nagios服务！
二、建立 MySQL检测用户
mysql> GRANT REPLICATION CLIENT ON *.* TO ztz@localhost identified by '123';
mysql> flush privileges;
编写插件
被监控主机上
vim /usr/local/nagios/libexec/check_slave
#!/bin/bash
MYSQLUSER=ztz
MYSQLPS=123
MYSQLBIN=/usr/bin/mysql
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
STATE_NUM=$($MYSQLBIN -u$MYSQLUSER -p$MYSQLPS -e "show slave status\G" | grep Running |
grep Yes | wc -l)
if [ $? -ne 0 ];then
echo "Please Check the Plugins"
exit $STATE_UNKNOWN fi
if [ "${STATE_NUM}" -eq 2 ];then echo "Check OK,MySQL Replication is running"
exit $STATE_OK
else echo "Check Critical,MySQL Replication is error"
exit $STATE_CRITICAL
fi
被监控主机测试
[root@Nagiost ~]# cd /usr/local/nagios/libexec/
[root@Nagios-Client libexec]# chmod +x check_slave
[root@Nagios-Client libexec]# ./check_slave
Check OK,MySQL Replication is running
修改被监控主机的 nrpe.confg
[root@Nagios-Client ~]# vi /usr/local/nagios/etc/nrpe.cfg
添加：
command[check_slave]=/usr/local/nagios/libexec/check_slave
修改监控主机服务定义文件
[root@Nagios-Server ~]# vi /usr/local/nagios/etc/objects/localhost.cfg
添加： define service {
host_name Nagios-Client
service_description check-slave
check_period 24x7
max_check_attempts 4
normal_check_interval 3
retry_check_interval 2
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
check_command check_nrpe!check_slave
}
3>重新加载 Nagios
[root@Nagios-Server ~]# /etc/init.d/nagios reload
Running configuration check...done.
Reloading nagios configuration...done
4>登陆验证
三、设置短信报警
1 install
rpm -ivh /tmp/msmtp-1.4.6-1.el5.scopserv.i386.rpm
2 config
[187 tmp]#cd /etc/
[187 tmp]#vim msmtprc 默认是没有这个文件
account default
host smtp.163.com
port 25
from 13810599111@163.com
tls off
auth login
user 13810599111
password 123
logfile /tmp/msmtp.log
3 mutt
vim /etc/Muttrc
2753 set sendmail="/usr/bin/msmtp"
2754 set from="13810599111@163.com"
2755 set realname="iori"
测试：
4 mutt+msmtp
echo "hello" | mutt -s "test" 13810599111@163.com
修改一下mail的内个就行了
5 nagios---command.cfg
define command{
command_name notify-by-sms
command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /usr/bin/mutt -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$
}
define contact {
contact_name ydl
alias ydl
host_notification_period 24x7
host_notification_options d,u,r
service_notification_period 24x7
service_notification_options w,u,c,r
service_notification_commands notify-by-sms
host_notification_commands notify-by-sms
email 13810599111@163.com
}
