monit mysql_monit 配置详解（monitrc）

悠悠 2022-11-05 01:56 175阅读 0赞

monitrc是Monit的主配置文件(控制文件)。

monitrc的内容主要分为全局(golbal)和服务(services)两个部分。

默认情况下monitrc文件在/etc/monit目录下。

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\#\# 配置内容书写规范

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\# 注释以“\#”开头并延伸到行尾

\# 关键字不区分大小写

\# 所有路径必须完全限定路径，以“/”开头

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\#\# Global section 全局部分

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set daemon 120

\# 设置以守护进程的方式运行Monit，每隔2分钟检查一次服务

\# with start delay 240

\# 第一次启动时延迟检查4分钟(默认情况下，Monit启动后立即进行检查)

set logfile /var/log/monit.log

\# 设置系统日志记录。如果要改为记录到独立的日志文件，请指定日志文件的完整路径

\# set pidfile /var/run/monit.pid

\# 设置Monit实例的PID文件路径，PID文件记录了Monit实例进程的进程编号(PID)，默认情况下，文件放置在

\# $HOME/.monit.pid

set idfile /var/lib/monit/id

\# 设置Monit实例的id文件路径。id文件记录了Monit实例的唯一ID(标识)，id在第一次Monit启动时生成并存储。默\# 认情况下，文件放置在$HOME/.monit.id

set statefile /var/lib/monit/state

\# 设置在每个周期中保存监视状态的Monit状态文件的位置。默认情况下，文件放在$HOME/.monit.state. 如果状态文

\# 件存储在持久文件系统中，Monit在重新启动时将恢复监视状态。如果它在临时文件系统上，状态将在重新启动时丢

\# 失。

\# set limits \{

\# programOutput: 512 B, \# 检查程序输出截断限制

\# sendExpectBuffer: 256 B, \# send/expect协议测试限制

\# fileContentBuffer: 512 B, \# 文件内容缓冲区限制

\# httpContentBuffer: 1 MB, \# HTTP内容缓冲区限制

\# networkTimeout: 5 seconds \# 网络I/O超时限制

\# programTimeout: 300 seconds \# 检查程序超时限制

\# stopTimeout: 30 seconds \# 服务停止超时限制

\# startTimeout: 30 seconds \# 服务启动超时限制

\# restartTimeout: 30 seconds \# 服务重启超时限制

\# \}

\# 设置各种限制。以上示例显示了默认值。

\# set ssl \{

\# verify : enable, \# 验证SSL证书(默认禁用，但强烈建议)

\# selfsigned : allow \# 允许自签名SSL证书(默认情况下拒绝)

\# \}

\# 设置全局SSL选项

\# set mailserver mail.bar.baz, \# 主邮件服务器

\# backup.bar.baz port 10025, \# 备邮件服务器 on port 10025

\# localhost \# 如果没有邮件服务器就将警报发送到本地

\# 设置要传递警报的邮件服务器列表。可以使用逗号分隔符指定多个服务器。如果第一个邮件服务器发生故障，Monit

\# 将使用列表中的第二个邮件服务器，依此类推。默认情况下，Monit可以使用port选项覆盖它

set eventqueue

basedir /var/lib/monit/events \# 设置存储事件的基本目录

slots 100 \# 可选择限制队列大小

\# 默认情况下，如果没有可用的邮件服务器，Monit将删除警报事件。如果要保留警报以便以后重试传递，可以使

\# 用"eventqueue"语句。存储未送达警报的基本目录由"basedir"选项指定。您可以使用"slots"选项来限制队列大小

\# (如果省略，队列将受到后端文件系统中可用空间的限制)

\# set mmonit http://monit:monit@192.168.1.10:8080/collector

\# \# with timeout 30 seconds \# 默认超时5秒

\# \# and register without credentials \# 不注册凭据

\# 设置与M/Monit通信，向M/Monit发送状态和事件(有关M/Monit的更多信息，请参阅http://mminit.com/). 默认情

\# 况下，Monit使用M/Monit注册凭据，以便M/Monit可以顺利地与Monit通信，并且您不必在M/Monit中手动注册Monit

\# 凭据。可以使用下面的注释掉选项禁用凭证注册。但是，如果安全是一个问题，我们建议在与M/Monit通信时使用

\# https，并加密发送凭据。一般不使用。

\# set mail-format \{

\# from: monit@$HOST

\# subject: monit alert -- $EVENT $SERVICE

\# message: $EVENT Service $SERVICE

\# Date: $DATE

\# Action: $ACTION

\# Host: $HOST

\# Description: $DESCRIPTION

\# Your faithful employee,

\# Monit

\# \}

\# 设置邮件格式，默认情况下，如果缺少邮件格式"mail-format"语，Monit将使用以上格式发送警报。

\# set alert sysadm@foo.bar \# 接受所有警报

\# set alert your-name@your.domain not on \{ instance, action \} \# 不接受筛选器\{\}中的的警报

\# 设置警报关联的邮箱和筛选器，如果不设置任何筛选器则关联邮箱接受所有警报。

\# 当Monit启动、停止或执行用户启动的操作时，不要发出警报。建议使用上面第二个筛选器，以避免在一般情况下收

\# 到警报。

\# set httpd port 2812 and

\# use address localhost \# 仅接受本地主机的连接

\# allow localhost \# 允许从localhost访问HTTP接口

\# allow admin:monit \# 当管理者通过WEB访问时，需要使用账号密码验证身份"admin:monit"

\# Monit有一个嵌入式HTTP接口，可用于从WEB界面查看所监视服务的状态和管理服务。如果要从命令行发出Monit命

\# 令，例如“monit status”或“monit restart service”，则也需要HTTP接口。原因是Monit客户端使用HTTP接口

\# 将这些命令发送到正在运行的Monit守护程序。如果要为HTTP接口启用SSL，请参阅monitwiki。

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\#\# Services 服务部分

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\# 以下是一些配置示例。

\# check system $HOST

\# if loadavg (1min) > 4 then alert

\# if loadavg (5min) > 2 then alert

\# if cpu usage > 95% for 10 cycles then alert

\# if memory usage > 75% then alert

\# if swap usage > 25% then alert

\# 检查一般系统资源，如平均负载、cpu和内存使用情况。每个测试都指定一个资源、条件和测试失败时要执行的操

\# 作。

\# check file apache\_bin with path /usr/local/apache/bin/httpd

\# if failed checksum and

\# expect the sum 8f7f419955cefa0b33a2ba316cba3659 then unmonitor

\# if failed permission 755 then unmonitor

\# if failed uid root then unmonitor

\# if failed gid root then unmonitor

\# alert security@foo.bar on \{

\# checksum, permission, uid, gid, unmonitor

\# \} with the mail-format \{ subject: Alarm! \}

\# group server

\# 检查文件是否存在、校验和、权限、uid和gid。除了全局部分中的警报收件人外，还可以通过指定本地警报处理程

\# 序将自定义警报发送到其他收件人。可以使用GROUP选项对服务进行分组。可以通过重复“group name”语句指定多

\# 个组。

\# check process apache with pidfile /usr/local/apache/logs/httpd.pid

\# start program = "/etc/init.d/httpd start" with timeout 60 seconds

\# stop program = "/etc/init.d/httpd stop"

\# if cpu > 60% for 2 cycles then alert

\# if cpu > 80% for 5 cycles then restart

\# if totalmem > 200.0 MB for 5 cycles then restart

\# if children > 250 then restart

\# if loadavg(5min) greater than 10 for 8 cycles then stop

\# if failed host www.tildeslash.com port 80 protocol http

\# and request "/somefile.html"

\# then restart

\# if failed port 443 protocol https with timeout 15 seconds then restart

\# if 3 restarts within 5 cycles then unmonitor

\# depends on apache\_bin

\# group server

\# 检查进程是否正在运行(在本例中为Apache)，以及它是否响应HTTP和HTTPS请求。检查其资源使用情况，如cpu和

\# 内存，以及子进程的数量。如果进程没有运行，Monit将在默认情况下重新启动它。如果服务经常重新启动而问题仍

\# 然存在，可以使用"unmonitor"语句禁用监视。此服务依赖于上面定义的另一个服务(apache\_bin)

\# check filesystem datafs with path /dev/sdb1

\# start program = "/bin/mount /data"

\# stop program = "/bin/umount /data"

\# if failed permission 660 then unmonitor

\# if failed uid root then unmonitor

\# if failed gid disk then unmonitor

\# if space usage > 80% for 5 times within 15 cycles then alert

\# if space usage > 99% then stop

\# if inode usage > 30000 then alert

\# if inode usage > 99% then stop

\# group server

\# 检查文件系统权限、uid、gid、空间和inode使用情况。其他服务(如数据库)可能依赖于此资源，在文件系统变满

\# 和数据丢失之前，可能会向这些服务级联自动优雅的停止。

\# check file database with path /data/mydatabase.db

\# if failed permission 700 then alert

\# if failed uid data then alert

\# if failed gid data then alert

\# if timestamp > 15 minutes then alert

\# if size > 100 MB then exec "/my/cleanup/script" as uid dba and gid dba

\# 检查文件的时间戳。在这个例子中，我们测试一个文件是否超过15分钟，如果它没有被更新，我们会假设它有问

\# 题。另外，如果文件大小超过给定的限制，请执行脚本

\# check directory bin with path /bin

\# if failed permission 755 then unmonitor

\# if failed uid 0 then unmonitor

\# if failed gid 0 then unmonitor

\# 检查目录权限、uid和gid。如果目录不属于uid为0且gid为0的用户，则会触发事件。

\# check host myserver with address 192.168.1.1

\# if failed ping then alert

\# if failed port 3306 protocol mysql with timeout 15 seconds then alert

\# if failed port 80 protocol http

\# and request /some/path with content = "a string"

\# then alert

\# 通过发出ping测试检查远程主机的可用性，并检查来自web服务器的响应的内容。最多发送三个ping，并执行到端口

\# 的连接和应用程序级网络检查

\# check network public with interface eth0

\# if failed link then alert

\# if changed link then alert

\# if saturation > 90% then alert

\# if download > 10 MB/s then alert

\# if total upload > 1 GB in last hour then alert

\# 检查网络链路状态(上/下)、链路容量变化、饱和和带宽使用情况.

\# check program myscript with path /usr/local/bin/myscript.sh

\# if status != 0 then alert

\# 检查自定义程序状态输出，执行脚本"/usr/local/bin/myscript.sh",如果脚本执行完成后系统的状态值不等于0，

\# 则报警

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\#\# Includes 附加部分

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\# 可以使用"include"包含来自其他文件或目录的附加配置文件,将部分配置独立一个配置文件，便于管理。

include /etc/monit/conf.d/\*

include /etc/monit/conf-enabled/\*