1 安裝

1.1 Tar包安裝

??（1）下載

wget https://dl.influxdata.com/kapacitor/releases/kapacitor-1.5.5_linux_amd64.tar.gz

??（2）安裝

$ tar xvfz /opt/package/kapacitor-1.5.5-static_linux_amd64.tar.gz -C /home/tigk/.local/ $ mv /home/tigk/.local/kapacitor-1.5.5-1/ /home/tigk/.local/kapacitor

??（3）可執行文件路徑為：{influxdb目錄}/kapacitor

??默認配置文件所在路徑：{influxdb目錄}/kapacitor.conf

$ mkdir /data/tigk/kapacitor/conf $ cp /home/tigk/.local/kapacitor/kapacitor.conf /data/tigk/kapacitor/conf/ $ cd /data/tigk/kapacitor/ $ mkdir data $ mkdir logs

??然后進行修改配置文件

??（4）編輯配置文件

??/data/tigk/kapacitor/conf/kapacitor.conf,定位到[[influxdb]]

$ vim /data/tigk/kapacitor/conf/kapacitor.conf data_dir = "/data/tigk/kapacitor/data" # https-certificate = "/etc/ssl/kapacitor.pem" [logging]file = "/data/tigk/kapacitor/logs/kapacitor.log" [load]dir = "/data/tigk/kapacitor/load" [replay]dir = "/data/tigk/kapacitor/replay" [task]# Where to store the tasks database# DEPRECATED: This option is not needed for new installations.# It is only used to determine the location of the task.db file# for migrating to the new `storage` service.dir = "/data/tigk/kapacitor/tasks" [storage]# Where to store the Kapacitor boltdb databaseboltdb = "/data/tigk/kapacitor/boltdb/kapacitor.db" [[influxdb]]name = "fbi-local-02"urls = ["http://localhost:8085"]

??（4）啟動服務

$ cd /home/tigk/.local/kapacitor/ $ ./kapacitord -config /data/tigk/kapacitor/conf/kapacitor.conf

??或者后臺啟動

$ nohup ./kapacitord -config /data/tigk/kapacitor/conf/kapacitor.conf &

1.2 RPM包安裝

??（1）下載

wget https://dl.influxdata.com/kapacitor/releases/kapacitor-1.5.5-1.x86_64.rpm

??（2）安裝

sudo yum localinstall kapacitor-1.5.5-1.x86_64.rpm

??（3）修改配置文件

/etc/kapacitor/kapacitor.conf

??（4）啟動服務

sudo systemctl start kapacitor

2 使用

2.1 Kapacitor 常用命令

??Kapacitor 是數據處理引擎，主要用來作為報警使用。使用TICKscript來定義任務，腳本定義了kapacitor處理的數據來源及處理過程。
??kapacitor常用命令

kapacitor list tasks –顯示所有當前kapacitor加載的腳本 kapacitor define -tick -dbrp -type –安裝腳本到kapacitor kapacitor enable –腳本監控開啟 kapacitor disable –腳本監控關閉 kapacitor show –顯示某一個腳本的執行狀態 kapacitor record -task -duration –記錄某一時間段內某腳本運行狀態（測試用） kapacitor replay kapacitor replay -recording -task –重復執行測試結果

??如果Kapacitor啟動并運行，您將看到一個空的任務列表，如下所示：

$ ./kapacitor list tasks ID Type Status Executing Databases and Retention Policies

2.2 CPU告警案例

??（1）編寫tick文件，當cpu閑置率小于70%則告警
??vi cpu_alert.tick

stream|from().measurement('cpu')|alert().crit(lambda:"usage_idle" < 70).log('/data/tigk/kapacitor/alerts/cpu_alert.log')

??（2）Kapacitor任務定義，到Kapacitor的安裝目錄下

./kapacitor define cpu_alert -type stream -tick /data/tigk/kapacitor/tick/cpu_alert.tick -dbrp telegraf.autogen

??define：定義任務名，-tpye：指定任務類型，-tick：指定腳本名，-dprp：指定數據保留策略
??（3）查詢已定義任務

$ ./kapacitor list tasks ID Type Status Executing Databases and Retention Policies cpu_alert stream disabled false ["telegraf"."autogen"]

??（4）查詢任務詳細信息

$ ./kapacitor show cpu_alert ID: cpu_alert Error: Template: Type: stream Status: disabled Executing: false Created: 05 Jul 20 20:33 CST Modified: 05 Jul 20 20:33 CST LastEnabled: 01 Jan 01 00:00 UTC Databases Retention Policies: ["telegraf"."autogen"] TICKscript: stream|from().measurement('cpu')|alert().crit(lambda: "usage_idle" < 70).log('/data/tigk/kapacitor/alerts/cpu_alert.log')DOT: digraph cpu_alert { stream0 -> from1; from1 -> alert2; }

??（5）腳本監控生效

$ ./kapacitor enable cpu_alert

??（6）腳本監控關閉

$ ./kapacitor disable cpu_alert

總結

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