monit 监控并自动重启服务

Monit是一款功能非常丰富的进程、文件、目录和设备的监测软件,用于Unix平台。 它可以自动修复那些已经停止运作的程序,特使适合处理那些由于多种原因导致的软件错误。monit运行于应用层

安装很简单,三部曲

#./configure

#make

#make install

 

复制配置文件

# cp monitrc /etc/monitrc

 

接下来我们根据实际情况来修改这个配置文件

set daemon 120 # Poll at 2-minute intervals//每2分钟检查一次 set logfile /home/monit/log/monit.log          //monit的日志文件 set alert [email protected] with reminder on 1 cycle  //出现1次错误的时候发报警邮件到指定的邮箱 #set mailserver mail.tildeslash.com, mail.foo.bar port 10025, localhost with tim eout 15 seconds set mailserver 10.10.9.109    //设置邮件服务器

set httpd port 2812 and use address 10.10.8.2 //设置http监控页面的端口和ip     allow localhost   # Allow localhost to connect //允许本机访问     allow 10.10.8.0/24                                            //允许此IP段访问     allow admin:nishiwode # Allow Basic Auth   //认证的用户名和密码

# all system                                                         //平均负载.内存使用率,cpu使用率 check system 10.10.8.2    if loadavg (1min) > 4 then alert    if loadavg (5min) > 2 then alert    if memory usage > 75% then alert    if cpu usage (user) > 70% then alert    if cpu usage (system) > 30% then alert    if cpu usage (wait) > 20% then alert

# all disk                                                              //磁盘空间使用率 check device data with path /dev/sda2    if space usage > 90% then alert    if inode usage > 85% then alert

check device home with path /dev/sda3    if space usage > 85% then alert    if inode usage > 85% then alert # all rsync

#10.10.8.2 check process sshd with pidfile /var/run/sshd.pid start program "/etc/init.d/sshd start" stop program "/etc/init.d/sshd stop" if failed host 127.0.0.1 port 22 protocol ssh then restart if 5 restarts within 5 cycles then timeout

//监控ssh服务 check process httpd with pidfile /var/run/httpd.pid group apache start program = "/etc/init.d/httpd start" stop program = "/etc/init.d/httpd stop" if failed host 127.0.0.1 port 80 protocol http then restart if 5 restarts within 5 cycles then timeout //监控http服务

//监控自定义服务 check process web_lb with pidfile /data/v20/server/web_lb/httpd.pid     start program = "/data/v20/bin/lb.sh"  //启动脚本     stop  program = "/data/v20/bin/lb_stop.sh" //停止脚本     if failed host 10.10.8.2 port 16101 proto http then restart     if failed host 10.10.8.2 port 16101 proto http for 5 times within 5 cycles t hen exec "/data/v20/bin/lb_pay.sh"     if failed host 10.10.8.2 port 16102 type TCPSSL proto http then restart     if failed host 10.10.8.2 port 16102 type TCPSSL proto http for 5 times withi n 5 cycles then exec "/data/v20/bin/lb_pay.sh

RHEL可以用如下方法启动monit # vi /etc/inittab 添加: mo:2345:respawn:/usr/local/bin/monit -Ic /etc/monitrc

Now start monit: # init -q或者# telinit -q You can verify that monit is started from /var/log/message log file: # tail -f /var/log/message 如果正常启动能看到如下输出: Nov 21 04:39:21 server monit[8759]: Starting monit daemon Nov 21 04:39:21 server monit[8759]: Monit started   最后可以测试一下,看看是否有让你满意的效果.