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meta_yaml: "https://github.com/netdata/netdata/edit/master/src/go/plugin/go.d/modules/docker_engine/metadata.yaml"
sidebar_label: "Docker Engine"
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message: "DO NOT EDIT THIS FILE DIRECTLY, IT IS GENERATED BY THE COLLECTOR'S metadata.yaml FILE"
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# Docker Engine


<img src="https://netdata.cloud/img/docker.svg" width="150"/>


Plugin: go.d.plugin
Module: docker_engine

<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" />

## Overview

This collector monitors the activity and health of Docker Engine and Docker Swarm.


The [built-in](https://docs.docker.com/config/daemon/prometheus/) Prometheus exporter is used to get the metrics.


This collector is supported on all platforms.

This collector supports collecting metrics from multiple instances of this integration, including remote instances.


### Default Behavior

#### Auto-Detection

It discovers instances running on localhost by attempting to connect to a known Docker TCP socket: `http://127.0.0.1:9323/metrics`.


#### Limits

The default configuration for this integration does not impose any limits on data collection.

#### Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.


## Metrics

Metrics grouped by *scope*.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.



### Per Docker Engine instance

These metrics refer to the entire monitored application.

This scope has no labels.

Metrics:

| Metric | Dimensions | Unit |
|:------|:----------|:----|
| docker_engine.engine_daemon_container_actions | changes, commit, create, delete, start | actions/s |
| docker_engine.engine_daemon_container_states_containers | running, paused, stopped | containers |
| docker_engine.builder_builds_failed_total | build_canceled, build_target_not_reachable_error, command_not_supported_error, dockerfile_empty_error, dockerfile_syntax_error, error_processing_commands_error, missing_onbuild_arguments_error, unknown_instruction_error | fails/s |
| docker_engine.engine_daemon_health_checks_failed_total | fails | events/s |
| docker_engine.swarm_manager_leader | is_leader | bool |
| docker_engine.swarm_manager_object_store | nodes, services, tasks, networks, secrets, configs | objects |
| docker_engine.swarm_manager_nodes_per_state | ready, down, unknown, disconnected | nodes |
| docker_engine.swarm_manager_tasks_per_state | running, failed, ready, rejected, starting, shutdown, new, orphaned, preparing, pending, complete, remove, accepted, assigned | tasks |



## Alerts

There are no alerts configured by default for this integration.


## Setup

### Prerequisites

#### Enable built-in Prometheus exporter

To enable built-in Prometheus exporter, follow the [official documentation](https://docs.docker.com/config/daemon/prometheus/#configure-docker).



### Configuration

#### File

The configuration file name for this integration is `go.d/docker_engine.conf`.


You can edit the configuration file using the `edit-config` script from the
Netdata [config directory](/docs/netdata-agent/configuration/README.md#the-netdata-config-directory).

```bash
cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config go.d/docker_engine.conf
```
#### Options

The following options can be defined globally: update_every, autodetection_retry.


<details open><summary>Config options</summary>

| Name | Description | Default | Required |
|:----|:-----------|:-------|:--------:|
| update_every | Data collection frequency. | 1 | no |
| autodetection_retry | Recheck interval in seconds. Zero means no recheck will be scheduled. | 0 | no |
| url | Server URL. | http://127.0.0.1:9323/metrics | yes |
| username | Username for basic HTTP authentication. |  | no |
| password | Password for basic HTTP authentication. |  | no |
| proxy_url | Proxy URL. |  | no |
| proxy_username | Username for proxy basic HTTP authentication. |  | no |
| proxy_password | Password for proxy basic HTTP authentication. |  | no |
| timeout | HTTP request timeout. | 1 | no |
| method | HTTP request method. | GET | no |
| body | HTTP request body. |  | no |
| headers | HTTP request headers. |  | no |
| not_follow_redirects | Redirect handling policy. Controls whether the client follows redirects. | no | no |
| tls_skip_verify | Server certificate chain and hostname validation policy. Controls whether the client performs this check. | no | no |
| tls_ca | Certification authority that the client uses when verifying the server's certificates. |  | no |
| tls_cert | Client TLS certificate. |  | no |
| tls_key | Client TLS key. |  | no |

</details>

#### Examples

##### Basic

A basic example configuration.

```yaml
jobs:
  - name: local
    url: http://127.0.0.1:9323/metrics

```
##### HTTP authentication

Basic HTTP authentication.

<details open><summary>Config</summary>

```yaml
jobs:
  - name: local
    url: http://127.0.0.1:9323/metrics
    username: username
    password: password

```
</details>

##### HTTPS with self-signed certificate

Configuration with enabled HTTPS and self-signed certificate.

<details open><summary>Config</summary>

```yaml
jobs:
  - name: local
    url: http://127.0.0.1:9323/metrics
    tls_skip_verify: yes

```
</details>

##### Multi-instance

> **Note**: When you define multiple jobs, their names must be unique.

Collecting metrics from local and remote instances.


<details open><summary>Config</summary>

```yaml
jobs:
  - name: local
    url: http://127.0.0.1:9323/metrics

  - name: remote
    url: http://192.0.2.1:9323/metrics

```
</details>



## Troubleshooting

### Debug Mode

**Important**: Debug mode is not supported for data collection jobs created via the UI using the Dyncfg feature.

To troubleshoot issues with the `docker_engine` collector, run the `go.d.plugin` with the debug option enabled. The output
should give you clues as to why the collector isn't working.

- Navigate to the `plugins.d` directory, usually at `/usr/libexec/netdata/plugins.d/`. If that's not the case on
  your system, open `netdata.conf` and look for the `plugins` setting under `[directories]`.

  ```bash
  cd /usr/libexec/netdata/plugins.d/
  ```

- Switch to the `netdata` user.

  ```bash
  sudo -u netdata -s
  ```

- Run the `go.d.plugin` to debug the collector:

  ```bash
  ./go.d.plugin -d -m docker_engine
  ```

### Getting Logs

If you're encountering problems with the `docker_engine` collector, follow these steps to retrieve logs and identify potential issues:

- **Run the command** specific to your system (systemd, non-systemd, or Docker container).
- **Examine the output** for any warnings or error messages that might indicate issues.  These messages should provide clues about the root cause of the problem.

#### System with systemd

Use the following command to view logs generated since the last Netdata service restart:

```bash
journalctl _SYSTEMD_INVOCATION_ID="$(systemctl show --value --property=InvocationID netdata)" --namespace=netdata --grep docker_engine
```

#### System without systemd

Locate the collector log file, typically at `/var/log/netdata/collector.log`, and use `grep` to filter for collector's name:

```bash
grep docker_engine /var/log/netdata/collector.log
```

**Note**: This method shows logs from all restarts. Focus on the **latest entries** for troubleshooting current issues.

#### Docker Container

If your Netdata runs in a Docker container named "netdata" (replace if different), use this command:

```bash
docker logs netdata 2>&1 | grep docker_engine
```


