Kapacitor

Kapacitor is a data processing engine. It can process both stream (subscribe realtime) and batch (bulk query) data from InfluxDB. Kapacitor lets you define custom logic to process alerts with dynamic thresholds, match metrics for patterns, compute statistical anomalies, etc.
 * site

=Installation= wget https://s3.amazonaws.com/influxdb/kapacitor_0.10.0-1_amd64.deb sudo dpkg -i kapacitor_0.10.0-1_amd64.deb

=Configuration=

Standalone
kapacitord config > kapacitor.conf

Editer le fichier kapacitor.conf pour modifier l'adresse du serveur influxdb stockant la base de données telegraf.

Service
Editer le fichier /etc/kapacitor/kapacitor.conf pour modifier l'adresse du serveur influxdb stockant la base de données telegraf.

=Lancement=

Standalone
kapacitord -config ./kapacitor.conf

Service
sudo service kapacitor start sudo service kapacitor status

=Utilisation= kapacitor help

record  record the result of a query or a snapshot of the current stream data. define  create/update a task. replay  replay a recording to a task. enable  enable and start running a task with live data. disable stop running a task. reload  reload a running task with an updated task definition. push    publish a task definition to another Kapacitor instance. Not implemented yet. delete  delete a task or a recording. list    list information about tasks or recordings. show    display detailed information about a task. help    get help for a command. level   sets the logging level on the kapacitord server. version displays the Kapacitor version info. Installer et démarrer Telegraf sur une ou plusieurs machines à monitorer

Depuis un autre terminal, Créer le fichier cpu_alert.tick

stream .from.measurement('cpu_usage_idle') .groupBy('host') .window .period(1m) .every(1m) .mapReduce(influxql.mean('value')) .eval(lambda: 100.0 - "mean") .as('used') .alert .message(': / has high cpu usage: ') .warn(lambda: "used" > 70.0) .crit(lambda: "used" > 85.0)

Définir et démarrer la tache cpu_alert.tick kapacitor define \ -name cpu_alert \ -type stream \ -dbrp telegraf.default \ -tick ./cpu_alert.tick

kapacitor list tasks

kapacitor enable cpu_alert kapacitor list tasks kapacitor show cpu_alert
 * 1) Start the task

=Recording= TODO kapacitor help recording kapacitor list recordings kapacitor record stream -name cpu_alert -duration 1m kapacitor list recordings

=Replay= TODO kapacitor help replay kapacitor list recordings kapacitor replay -id 6f68d222-0873-44ad-9d46-7b4b03d8acee -name cpu_alert -rec-time

=Arrêt d'une tâche= Arrêter la tâche cpu_alert.tick kapacitor disable cpu_alert

Remarque: en cas d'arrêt et de redémarrage de kapacitord, les taches actives avant l'arrêt sont activées.