monit 介绍

monit监控和管理进程、程序、文件、目录和Unix系统的文件的工具。可以进行自动维护和修理，在错误的情况下执行有意义的因果关系的行动。比如，某个进程没有运行启动它；没有响应重启它；占用太多资源停止该进程等等。也可以用来监控文件、目录或系统文件的变化，如时间戳的改变，检验和的改变或大小的改变。

文档地址：http://mmonit.com/monit/documentation/monit.html

monit 安装

# yum install monit

monit 配置

# vi /etc/monit.conf
set daemon  30
set mailserver localhost
set mail-format { from: moniter@ttlsa.com }
set alert mobei@ttlsa.com
set httpd port 2812 and
    use address 192.168.1.190
    allow localhost
    allow admin:'123456'  # password: 123456
    allow @monit
    allow @users readonly

检查配置文件正确性

# monit -t
Control file syntax OK

启动

# service monit start

实际应用实例

监控服务的monit配置文件放在/etc/monit.d/目录下，如：

nginx监控服务

# vi /etc/monit.d/nginx.monit.conf 
check process nginx with pidfile /var/run/nginx.pid
    start program = "/etc/init.d/nginx start"
    stop program = "/etc/init.d/nginx stop"

php-fpm监控服务

# vi /etc/monit.d/php-fpm.monit.conf 
check process php-fpm with pidfile /var/run/php-fpm.pid
    group www
    start program = "/etc/init.d/php-fpm start"
    stop program  = "/etc/init.d/php-fpm stop"
    if failed port 9000 type TCP then restart
    ## if failed unixsocket /var/run/php-fpm.sock then restart
    if 3 restarts within 5 cycles then timeout