monit介紹和配置

時間 2019-11-06

標籤 monit 介紹配置简体版

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1.介紹php

monit監控和管理進程、程序、文件、目錄和Unix系統的文件的工具。能夠進行自動維護和修理，在錯誤的狀況下執行有意義的因果關係的行動。好比，某個進程沒有運行啓動它；沒有響應重啓它；佔用太多資源中止該進程等等。也能夠用來監控文件、目錄或系統文件的變化，如時間戳的改變，檢驗和的改變或大小的改變mysql

2.安裝：(需先裝epel源)nginx

yum install monit -y sql

3.配置apache

3.1 monit 的配置文件monit.conf服務器

set daemon 30 監控檢查的時間間隔ssh

set logfile syslog 默認日誌爲syslog，還能夠設置爲自定義路徑下的文件工具

set pidfile /var/run/monit.pid 設置pid文件的位置 spa

set idfile /var/.monit.id 設置監控項目惟一ID的文件位置默認在$HOME/.monit.idrest

set statefile /var/.monit.state 默認存儲每一個週期內monitorinig 狀態的文件

set mailserver mail.bar.baz 主的郵件服務器

backup.bar.baz port 10025 備的郵件服務器

  mailserver 支持格式爲： 

  SET MAILSERVER <hostname|ip-address [PORT number] [USERNAME string] [PASSWORD string] [using SSLAUTO|SSLV2|SSLV3|TLSV1|TLSV11|TLSV12] [CERTMD5 checksum]>, ... 

                  [with TIMEOUT X SECONDS] 

                  [using HOSTNAME hostname] 

 
     set eventqueue         #默認當郵件服務器不可用時使用eventqueue存儲報警事件 

 
          basedir /var/monit   

 
          slots 100            #限制隊列大小 

set mail-format { 設置郵件告警的格式

from: monit@$HOST

subject: monit alert -- $EVENT $SERVICE

message: $EVENT Service $SERVICE

Date: $DATE

Action: $ACTION

Host: $HOST

Description: $DESCRIPTION

Your faithful employee,

Monit

}

set alert sysadm@foo.bar 設置接收告警的郵箱

以上是全局的配置，具體的services監控語法後面會介紹

3.2 進程監控

在 /etc/monit.d/下建立 nginx ，，並重啓monit。內容以下

check process nginx with pidfile /usr/local/xywy/nginx/run/nginx.pid
start program = "/usr/local/xywy/nginx/sbin/nginx" with timeout 30 seconds
stop program = "/usr/local/xywy/nginx/sbin/nginx -s stop"

3.3 監控文件

在/etc/monit.d/下建立monit_test ,並重啓monit，內容以下

check file monit.conf path /etc/monit.conf
group system
if changed sha1 checksum
then exec "/usr/local/bin/monit -c /etc/monit.conf reload"

3.4 監控文件設備

check device VAR_LOG with path /var/log
if space usage > 85% then alert

check filesystem tmpfs with path /var
if space usage > 80% then alert

下面是配置綜合案例

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 port 22 protocol ssh then restart
   if 5 restarts within 5 cycles then timeout

check process mysql with pidfile /var/run/mysqld/mysqld.pid
   group database
   start program = "/etc/init.d/mysqld start"
   stop program = "/etc/init.d/mysqld stop"
   if failed host 127.0.0.1 port 3306 then restart
   if 5 restarts within 5 cycles then timeout

 check process nginx with pidfile /var/run/nginx.pid
    start program = "/etc/init.d/nginx start"
    stop program  = "/etc/init.d/nginx stop"
    if failed host www.vpsee.com port 80 protocol http
       then restart

 check process php_cgi with pidfile /var/run/php_cgi.pid
    start program = "/etc/init.d/php_cgi start"
    stop program  = "/etc/init.d/php_cgi stop"
    if failed host 127.0.0.1 port 9000 then restart
    if 5 restarts within 5 cycles then timeout

check process apache with pidfile /var/run/httpd.pid
   group www
   start program = "/etc/init.d/httpd start"
   stop program  = "/etc/init.d/httpd stop"
   if failed host www.vpsee.com port 8080 protocol http
      then restart
   if cpu is greater than 80% for 2 cycles then alert
   if cpu > 80% for 5 cycles then restart
   if totalmem > 512 MB for 5 cycles then restart
   if children > 200 then restart
   if loadavg(5min) greater than 10 for 8 cycles then stop
   if 3 restarts within 5 cycles then timeout