Metrics Plugins

Fluentd has nine (9) types of plugins:
​Input​
​Parser​
​Filter​
​Output​
​Formatter​
​Storage​
​Service Discovery​
​Buffer​
​Metrics​
This article gives an overview of Metrics Plugin.
Overview
Sometimes, the input/filter/output plugin needs to save its internal metrics in memory, influxdb or prometheus format ready in instances. Fluentd has a pluggable system called Metrics that lets a plugin store and reuse its internal state as metrics instances.
How To Use
On Fluentd core, metrics plugin will handled on <metrics> on <system> to set up easily.
Here is an example with metrics_local:
<system>
  <metrics>
    @type local
  </metrics>
</system>
local type plugin should provide equivalent behavior before Fluentd v1.13. This metrics type should provide single numeric value storing functionality.
And this local type plugin should be used by default.
List of Built-in Metrics Plugins
​local​
List of Base Plugin classes with Metrics support
Fluent::Plugin::Input for Input plugin base class
Fluent::Plugin::Output for most of output plugin base class
Fluent::Plugin::Filter for Filter plugin base class
Fluent::Plugin::MultiOutput for out_copy plugin base class
Fluent::Plugin::BareOutput for fluent-plugin-forest output plugin base class
List of 3rd party metrics plugins
NOTE: This 3rd party metrics plugin list does not fully covers all of them.
​fluent-plugin-metrics-cmetrics​
If this article is incorrect or outdated, or omits critical information, please let us know. Fluentd is an open-source project under Cloud Native Computing Foundation (CNCF). All components are available under the Apache 2 License.

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local

Last modified 1yr ago