2. 安装
tar zxvf /usr/local/src/monit-5.2.5.tar.gz -C /usr/local/src
cd /usr/local/src/monit-5.2.5
首先确保openssl和openssl-devel已经安装过，没有安装，按照下面的操作来
yum install openssl openssl-devel -y
如果已经安装openssl，执行下面的步骤，安装monit
./configure --with-ssl-incl-dir=/usr/include --with-ssl-lib-dir=/usr/lib64
失败：error: PAM enabled but headers or library not found
安装：yum install pam-devel
make
make install
cp monitrc /etc/
chmod 0700 /etc/monitrc
4. 设置选项
vi /etc/monitrc
set daemon 120
set logfile syslog facility log_daemon
set idfile /usr/local/monit/monit.id
set statefile /usr/local/monit/monit.state
set mailserver localhost
set alert emailaddress
set httpd port 2812 and use address 192.168.1.10
allow localhost
allow 192.168.1.0/24
allow admin:"password"
include /etc/monit.d/*
选项说明：
set daemon 120
设置monit作为守护进程运行，每2分钟监视一次
set logfile
设置日志文件
set idfile
设置id文件
set statefile
设置状态文件
set mailserver
设置邮件服务器
set alert
设置发送警告的邮箱
set httpd port portnumber and use address ipaddress
设置页面监控页面的监听IP和端口号
allow
允许连接的主机ip，或网段
allow username:password
设置页面监控访问的用户名和密码
include /etc/monit.d/*
可以将具体监控服务的文件放在这个目录中，monit会自动包含这些文件
5. 监控具体服务
monit内置了一些协议，具体的在源代码目录的protocols中有，支持的有：aphe_status clamav default dns dwp ftp gener gps http imap ldap2 ldap3 lmtp mehe mysql nntp NOTES ntp3 pgsql radius rdate rsy sip smtp ssh tns
vi /etc/monit.d/nginx.monit
check process nginx with pidfile /usr/local/nginx/nginx.pid
start program = "/usr/local/nginx/sbin/nginx"
stop program = "/usr/local/nginx/sbin/nginx -s stop"
if failed host 192.168.1.11 port 8011 protocol http then restart
b. 监控memcached
vi /etc/monit.d/memcached.monit
check process memcached with pidfile /tmp/linuxjcq_memcached.pid
start program = "/etc/rc.d/init.d/memcached start"
stop program = "/etc/rc.d/init.d/memcached stop"
if failed host 192.168.1.10 port 11211 protocol memcache then restart
c. 监控php-fpm
vi /etc/monit.d/php-fpm.monit
check process php-fpm with pidfile /usr/local/php/logs/php-fpm.pid
start program = "/usr/local/php/sbin/php-fpm start"
stop program = "/usr/local/php/sbin/php-fpm stop"
if cpu > 50% for 2 cycles then alert
if cpu > 70% for 5 cycles then restart
if failed host 192.168.1.10 port 9000 then restart
if 5 restarts within 5 cycles then timeout
d. 监控mysql
vi /etc/monit.d/mysqld.monit
check process mysqld with pidfile /data/mysql/mysql.pid
start program = "/etc/init.d/mysqld start"
stop program = "/etc/init.d/mysqld stop"
if failed host 192.168.1.10 port 3306 then restart
if 5 restarts within 5 cycles then timeout
6. 测试配置文件
/usr/local/monit/bin/monit -tc /etc/monitrc
7. 添加为init进程，并启动
vi /etc/init/monit.conf
# monit
start on stopped rc RUNLEVEL=[2345]
respawn
exec /usr/local/bin/monit -Ic /etc/monitrc
8、邮件报警功能
主要关注的告警功能
set mailserver smtp.163.com port 25 ##设置邮件服务器及端口，这里使用的163邮件服务器
username 发件人有限 password “发件人邮箱密码”
set mail-format {
from: root@localhost.com
subject: monit alert -- $EVENT $SERVICE
message: $EVENT Service $SERVICE
Date: $DATE
Action: $ACTION
Host: $HOST
Description: $DESCRIPTION
Your faithful employee,
Monit
}
start all
启动所有的监控的服务
stop all
停止所有的监控的服务
restart all
重启所有的监控的服务
monitor all
监控所有的服务
unmonitor all
取消对所有服务的监控
start name
启动指定的服务
stop name
停止指定的服务
restart name
重启指定的服务
monitor name
监控指定的服务
unmonitor name
取消对指定服务的监控
monit自身相关的命令
reload
重新初始化monit
status
打印所有监控的服务的完整状态报告
summary
打印所有监控的服务概要
quit
退出monit，配置成init后，可以使用monit quit进行重启