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sensu からメールhandler

Last updated at Posted at 2014-04-02

背景

  • sensu は基本 json で値を返す。
  • そのままメールコマンド実行すると結構ウケる内容で来る。
  • 内容を見やすくして送信したいよね。
  • ってなわけで自作

Code

/etc/sensu/conf.d/handler_email.json
{
        "handlers": {
        "email": {
                "type": "pipe",
                "command": "/etc/sensu/plugins/mail_send_sensu.rb"
                }
        }
}

でコマンド指定する。

/etc/sensu/plugins/mail_send_sensu.rb
#! /usr/bin/env ruby
# -*- coding: utf-8 -*-
require 'json'
require 'nkf'
require 'mail'

from_addr = "alert@"+`hostname`.chomp
to_addr = %w{mail@address}

while line = STDIN.gets
        json_data = JSON.parse(line)

        client_data = json_data["client"]
        check_data = json_data["check"]

        status = check_data["output"].split(" ")

        case status[1]
        when "OK:"
                status_flg = "Recovery"
        when "CRITICAL:"
                status_flg = "Critical"
        when "WARNING:"
                status_flg = "Warning"
        else
                status_flg = "Unknown"
        end

        send_subject = "ALERT ON #{status_flg}"
        mail_body = "##### Notifficate #{status_flg} ####\n"

        client_data.merge(check_data).each do |issue,data|
                mail_body << "#{issue}".ljust(20)+": #{data}".ljust(100)+"\n"
        end

        mail = Mail.new do
                to "#{to_addr.to_a.join(",")}"
                from "#{from_addr}"
                subject "#{send_subject}"
                body "#{NKF.nkf("-Wwm0", mail_body)}"
        end

        mail.deliver!

end
__END__

アラートをパイプで受け取り、ステータスチェック後mailする

とりあえず、晒すまでもないことだけど備忘録として置いてく。

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