Kapacitor

1. 설치

   • OS별 설치가이드
   • Ubuntu 16.04 환경하 설치

   • $ wget https://dl.influxdata.com/kapacitor/releases/kapacitor_1.2.0_amd64.deb
     $ sudo dpkg -i kapacitor_1.2.0_amd64.deb
     

   • 실행:

     $ service kapacitor start
     $ service kapacitor stop
     

2. 설정

   • 설정파일: /etc/kapacitor/kapacitor.conf
   • influxdb 에 대한 설정

     [[influxdb]]
     # Connect to an InfluxDB cluster
     # Kapacitor can subscribe, query and write to this cluster.
     # Using InfluxDB is not required and can be disabled.
     enabled = true
     default = true
     name = "localhost"
     urls = ["http://localhost:8086"]
     username = ""
     password = ""
     timeout = 0
     

3. 스크립트 생성 / 등록 / 관리

   • 생성 sample:

     $ vi /home/influxdb/kapacitor_script/cpu_alert.tick
     stream
     // Select just the cpu measurement from our example database.
     |from()
       .measurement('cpu')
     |alert()
       .crit(lambda: "usage_idle" <  70)
       // Whenever we get an alert write it to a file.
       .log('/tmp/alerts.log')
     

   • 등록:

     $ kapacitor define  "cpu_alert"  -type "stream"  -tick /home/influxdb/kapacitor_script/cpu_alert.tick -dbrp telegraf.default
     

     • type 은 stream 과 batch
     • dbrp 는 database . retention policy
     • tick 은 사용하는 스크립트
   • 실행: $ kapacitor record stream -task cpu_alert -duration 20s
   • 조회: $ kapacitor list recordings
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