influxdb 中缺少 kapacitor 指标数据库

Question

我的机器上有 kapacitor 1.3.1 和 influxdb 1.2.4 运行。虽然我已经启用了 kapacitor 来发送它的统计数据，但我没有在 influxdb 中看到 _kapacitor 数据库。我在这里错过了什么？ kapacitor.config:

hostname = "localhost"
[stats]
  # Emit internal statistics about Kapacitor.
  # To consume these stats create a stream task
  # that selects data from the configured database
  # and retention policy.
  #
  # Example:
  #  stream|from().database('_kapacitor').retentionPolicy('autogen')...
  #
  enabled = true
  stats-interval = "10s"
  database = "_kapacitor"
  retention-policy= "autogen"

[[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

Answer 1

问：我在这里缺少什么？

A: 在 Kapacitor 中启用统计功能，您迈出了正确的第一步。您需要在这里做的下一件事是反弹 Kapacitor 引擎，这样统计数据就会定期写入其内部数据库。

现在要注意的是，您还需要定义一个 TICK 脚本以从 Kapacitor 的内部数据库中提取统计信息，然后您可以选择要对其执行的操作，操纵数据并将其写回 InfluxDB 或引发 alerts.

示例：

var data = stream| from().database('_kapacitor').retentionPolicy('autogen')
data
  |log()
   .prefix('Kapacitor stat =>')

在你的 tick 脚本运行之后。你必须像往常一样做，比如将它安装到 Kapacitor 然后启用它。

kapacitor define test -type stream -tick test.tick -dbrp _kapacitor.autogen

这里有一个问题。您需要指定您在 config 中指定的保留策略，否则它将不知道在哪里查找数据。在本例中为 _kapacitor.autogen.

test   stream    disabled  false     ["_kapacitor"."autogen"]

接下来启用流任务。

kapacitor enable test

输出：

[test:log2] 2017/07/26 00:49:21 I! Kapacitor stat => {"Name":"ingress","Database":"_kapacitor","RetentionPolicy":"autogen","Group":"","Dimensions":{"ByName":false,"TagNames":null},"Tags":{"cluster_id":"c80d02c0-8c51-4071-8904-1583164e90ec","database":"_internal","host":"kapacitor_stoh","measurement":"tsm1_cache","retention_policy":"monitor","server_id":"82a2d589-db45-4cc5-81b0-674cb80737ac","task_master":"main"},"Fields":{"points_received":4753},"Time":"2017-07-26T00:49:21.75615995Z"}

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