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# Datadog Agent

> This feature is currently in early access mode. Please contact your Mezmo rep to gain direct access.

## Description

The [Datadog Agent](https://docs.datadoghq.com/agent/) is an open source agent that runs on a host to collect logs and metrics. This agent can be run locally per host, within Docker, or within Kubernetes. The `Datadog Agent Source` within Mezmo Pipeline is designed to receive data directly from the Agent via HTTPS. Mezmo can receive metrics individually, logs individually, or both simultaneously.

> As part of the Mezmo Platform onboarding flow, you can choose to set up a Pipeline specifically to reduce the log volume, and cost, associated with a DataDog Agent. During the onboarding flow process, set up your [Datadog Agent](https://docs.mezmo.com/2.8/telemetry-pipelines/mezmo-datadog-source-source), and [Datadog Metrics](https://docs.mezmo.com/2.8/telemetry-pipelines/datadog-metrics-destination) and [Datadog Logs](https://docs.mezmo.com/2.8/telemetry-pipelines/datadog-logs-destination) Destinations, then follow the instructions to finish setting up your Pipeline.

## Requirements

The running agent version must be \[ >= 6.35 or >= 7.35 ]

## Mezmo Pipeline Configuration

Adding a Datadog Agent source to a Pipeline is similar to adding a standard HTTP source. Add a source and choose **Datadog Agent**, optionally enter a **Title** and **Description**, then click `Save`.

Edit the node configuration:

Under `Access Key Management`

* Click the `Create new key` button
* Enter a `title`
* Choose the access key type as `User Defined`
* Enter your `Datadog API key`
* Click the `Create` button

Note the instructions with the overrides for `DD_LOGS_CONFIG_LOGS_DD_URL` and `DD_DD_URL`. These will be used directly in the Datadog Agent configuration.

Finish configuring the pipeline as desired and deploy.

### Datadog Agent Configuration

| Option                       | Description                                                                    |
| ---------------------------- | ------------------------------------------------------------------------------ |
| `DD_API_KEY`                 | The Datadog api key the agent is running with.                                 |
| `DD_DD_URL`                  | (optional) The custom Mezmo pipeline url to forward Datadog metrics to.        |
| `DD_LOGS_CONFIG_LOGS_DD_URL` | (optional) The custom Mezmo pipeline url to forward Datadog collected logs to. |
| `DD_LOGS_ENABLED`            | Set this configuration to true to allow the agent to collect logs.             |

## Examples

Datadog has provided detailed descriptions and various examples of agent configurations for the various systems:

* [host agent](https://docs.datadoghq.com/agent/logs/?tab=tailfiles)
* [docker](https://docs.datadoghq.com/containers/docker/log/?tab=containerinstallation)
* [kubernetes](https://docs.datadoghq.com/containers/kubernetes/log/?tab=operator)

#### Running the Datadog Agent via Docker:

Example pipeline publishing both logs and metrics to Mezmo:

```bash
docker run -d --name datadog-agent \
--cgroupns host \
--pid host \
-e DD_API_KEY=<DATADOG_API_KEY> \
-e DD_LOGS_ENABLED=true \
-e DD_LOGS_CONFIG_CONTAINER_COLLECT_ALL=true \
-e DD_LOGS_CONFIG_DOCKER_CONTAINER_USE_FILE=true \
-e DD_CONTAINER_EXCLUDE="name:datadog-agent" \
-e DD_DD_URL="https://pipeline.mezmo.com/v1/<YOUR ROUTE ID>" \ 
-e DD_LOGS_CONFIG_LOGS_DD_URL="<YOUR ROUTE ID>.v1.pipeline.mezmo.com:443" \
-v /var/run/docker.sock:/var/run/docker.sock:ro \
-v /var/lib/docker/containers:/var/lib/docker/containers:ro \
-v /opt/datadog-agent/run:/opt/datadog-agent/run:rw \
gcr.io/datadoghq/agent:latest
```

Note that `DD_LOGS_CONFIG_LOGS_DD_URL` override does not contain `https`as the protocol is already assumed by the agent.

### Running the local datadog agent

[https://docs.datadoghq.com/agent/guide/agent-configuration-files/?tab=agentv6v7](https://docs.datadoghq.com/agent/guide/agent-configuration-files/?tab=agentv6v7)

Example pipeline publishing both logs and metrics to Mezmo:

```yaml
api_key: <key>
dd_url: https://pipeline.mezmo.com/v1/<YOUR ROUTE ID>
logs_enabled: true
logs_config:
    container_collect_all: true
    logs_dd_url: <YOUR ROUTE ID>.v1.pipeline.mezmo.com:443
```