Sensu 모니터링 설정

아래 설정에 근거(※ 사전에 클라이언트에 Ruby 설치 필요)
http://sensuapp.org/docs/0.16/adding_a_check

Sensu 설치 단계

서버 측

클라이언트

클라이언트 설정
sensu-Plugin 설치

# gem install sensu-plugin --no-rdoc --no-ri

모니터링 스크립트 다운로드

# wget -O /etc/sensu/plugins/check-procs.rb https://raw.github.com/sensu/sensu-community-plugins/master/plugins/processes/check-procs.rb
# chmod 755 /etc/sensu/plugins/check-procs.rb

subscriptions 구성
※ name/address를 적절히 수정

# vi /etc/sensu/conf.d/client.json

/etc/sensu/conf.d/client.json

{
  "client": {
    "name": "Sensu-Client",
    "address": "192.168.xxx.xxx",
-    "subscriptions": [ "all" ]
+    "subscriptions": [ "webservers" ]
  }
}

서버 측 설정
정의 설정 모니터링

# vi /etc/sensu/conf.d/check_cron.json

/etc/sensu/conf.d/check_cron.json

{
  "checks": {
    "cron_check": {
      "handlers": ["default"],
      "command": "/etc/sensu/plugins/check-procs.rb -p crond -C 1 ",
      "interval": 60,
      "subscribers": [ "webservers" ]
    }
  }
}

Sensu 재부팅
클라이언트

# service sensu-client restart

서버 측

# service sensu-server restart
# service sensu-api restart

로그 확인
클라이언트

# grep cron_check /var/log/sensu/sensu-client.log
{"timestamp":"2015-01-19T21:51:48.042368+0900","level":"info","message":"received check request","check":{"name":"cron_check","issued":1421671843,"command":"/etc/sensu/plugins/check-procs.rb -p crond -C 1 "}}
{"timestamp":"2015-01-19T21:51:48.129277+0900","level":"info","message":"publishing check result","payload":{"client":"Sensu-Client","check":{"name":"cron_check","issued":1421671843,"command":"/etc/sensu/plugins/check-procs.rb -p crond -C 1 ","executed":1421671908,"duration":0.086,"output":"CheckProcs OK: Found 1 matching processes; cmd /crond/\n","status":0}}}

서버 측

# grep cron_check /var/log/sensu/sensu-server.log
{"timestamp":"2015-01-19T21:51:43.444922+0900","level":"info","message":"publishing check request","payload":{"name":"cron_check","issued":1421671903,"command":"/etc/sensu/plugins/check-procs.rb -p crond -C 1 "},"subscribers":["webservers"]}

고장 검측 확인
크롬을 멈춰봐

# service crond stop

Dashboard 확인
http://＜Server IP＞:3000/#/events

클라이언트 로그 확인

# grep cron_check /var/log/sensu/sensu-client.log | tail -2
{"timestamp":"2015-01-19T21:58:03.577208+0900","level":"info","message":"received check request","check":{"name":"cron_check","issued":1421672203,"command":"/etc/sensu/plugins/check-procs.rb -p crond -C 1 "}}
{"timestamp":"2015-01-19T21:58:03.663127+0900","level":"info","message":"publishing check result","payload":{"client":"Sensu-Client","check":{"name":"cron_check","issued":1421672203,"command":"/etc/sensu/plugins/check-procs.rb -p crond -C 1 ","executed":1421672283,"duration":0.086,"output":"CheckProcs CRITICAL: Found 0 matching processes; cmd /crond/\n","status":2}}}