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プロセス監視のためのmonitを設定してみる

Posted at

はじめに

自動復旧の監視ツールを探していて、monitの名前がでてきたので設定をメモ

手順

  • モジュールのインスト
yum install -y monit
  • configの設定
/etc/monit.conf
# 監視の実行タイミングを設定
set daemon 60
set logfile /var/log/monit.log

# 以下のファイルに監視対象のプロセスを記述していく
include /etc/monit.d/*
  • monitの起動
$ sudo /etc/init.d/monit start
  • Nginxを監視する
/etc/monit.d/nginx.conf
check process nginx with pidfile /var/run/nginx.pid
  start program = "/etc/init.d/nginx start" with timeout 60 seconds
  stop program  = "/etc/init.d/nginx stop"
  if failed port 80 protocol http
    then restart
  group nginx
  • 止めてみる
$ sudo /etc/init.d/nginx stop
  • 自動復旧されていることを確認
$ sudo tail -f /var/log/monit
[UTC Aug 25 08:02:39] info     : monit: generated unique Monit id c03c45bb368fcf0f98753f10facc3692 and stored to '/root/.monit.id'
[UTC Aug 25 08:02:39] info     : 'system_ip-10-0-131-120' Monit started
[UTC Aug 25 08:04:39] error    : 'nginx' process is not running
[UTC Aug 25 08:04:39] info     : 'nginx' trying to restart
[UTC Aug 25 08:04:39] info     : 'nginx' start: /etc/init.d/nginx

参考

MonitでSSH,Nginx,MySQLのサービス死活監視を行うChef Cookbook
http://easyramble.com/chef-monit-ssh-nginx-mysql.html

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