# Docker metrics

{% hint style="info" %}
**Supported event types:** `logs`
{% endhint %}

The *Docker* input plugin lets you collect Docker container metrics, including memory usage and CPU consumption.

## Configuration parameters

The plugin supports the following configuration parameters:

| Key               | Description                                                                                               | Default                      |
| ----------------- | --------------------------------------------------------------------------------------------------------- | ---------------------------- |
| `exclude`         | A space-separated list of containers to exclude.                                                          | *none*                       |
| `include`         | A space-separated list of containers to include.                                                          | *none*                       |
| `interval_nsec`   | Polling interval in nanoseconds.                                                                          | `0`                          |
| `interval_sec`    | Polling interval in seconds.                                                                              | `1`                          |
| `path.containers` | Container directory path, for custom Docker `data-root` configurations.                                   | `/var/lib/docker/containers` |
| `path.sysfs`      | Sysfs cgroup mount point.                                                                                 | `/sys/fs/cgroup`             |
| `threaded`        | Indicates whether to run this input in its own [thread](/manual/administration/multithreading.md#inputs). | `false`                      |

If you set neither `include` nor `exclude`, the plugin will try to get metrics from all running containers.

## Configuration file

The following example configuration collects metrics from two docker instances (`6bab19c3a0f9` and `14159be4ca2c`).

{% tabs %}
{% tab title="fluent-bit.yaml" %}

```yaml
pipeline:
  inputs:
    - name: docker
      include: 6bab19c3a0f9 14159be4ca2c

  outputs:
    - name: stdout
      match: '*'
```

{% endtab %}

{% tab title="fluent-bit.conf" %}

```
[INPUT]
  Name         docker
  Include      6bab19c3a0f9 14159be4ca2c

[OUTPUT]
  Name   stdout
  Match  *
```

{% endtab %}
{% endtabs %}

This configuration will produce records like the following:

```
[1] docker.0: [1571994772.00555745, {"id"=>"6bab19c3a0f9", "name"=>"postgresql", "cpu_used"=>172102435, "mem_used"=>5693400, "mem_limit"=>4294963200}]
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.fluentbit.io/manual/data-pipeline/inputs/docker-metrics.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.