---
title: "Datadog"
id: datadog
slug: "/tracing-datadog"
description: "Learn how to trace your Haystack pipelines with Datadog."
---

# Datadog

Learn how to trace your Haystack pipelines with Datadog.

<div className="key-value-table">

|  |  |
| --- | --- |
| **Tracer class** | `DatadogTracer` |
| **How to enable** | Enable the tracer with `tracing.enable_tracing(DatadogTracer(ddtrace.tracer))`, or add the `DatadogConnector` component to your pipeline |
| **Content tracing** | Set `HAYSTACK_CONTENT_TRACING_ENABLED` to `true` to trace component inputs and outputs |
| **Package** | `datadog-haystack` |
| **API reference** | [datadog](/reference/integrations-datadog) |
| **GitHub link** | https://github.com/deepset-ai/haystack-core-integrations/tree/main/integrations/datadog |

</div>

## Overview

Trace your Haystack pipelines with [Datadog](https://www.datadoghq.com/) through [Datadog's tracing library `ddtrace`](https://ddtrace.readthedocs.io/en/stable/). Haystack captures detailed information about pipeline runs, like API calls, context data, and prompts, so you can see the complete trace of your pipeline execution in Datadog.

## Installation

Install the `datadog-haystack` package:

```shell
pip install datadog-haystack
```

## Prerequisites

1. A way to receive traces, such as a running [Datadog Agent](https://docs.datadoghq.com/agent/). `ddtrace` sends traces to the Datadog Agent at `localhost:8126` by default.
2. Configure `ddtrace` through the standard mechanisms, for example the `DD_SERVICE`, `DD_ENV`, and `DD_VERSION` environment variables, or by running your application with the `ddtrace-run` command. See the [ddtrace documentation](https://ddtrace.readthedocs.io/en/stable/) for more details.

## Usage

Enable the `DatadogTracer` directly to trace any Haystack pipeline, without adding a component to it. Make sure to set the `HAYSTACK_CONTENT_TRACING_ENABLED` environment variable before importing any Haystack components.

```python
import os

os.environ["HAYSTACK_CONTENT_TRACING_ENABLED"] = "true"

import ddtrace

from haystack import Pipeline, tracing
from haystack.components.builders import ChatPromptBuilder
from haystack.components.generators.chat import OpenAIChatGenerator
from haystack.dataclasses import ChatMessage

from haystack_integrations.tracing.datadog import DatadogTracer

# Enable the Datadog tracer
tracing.enable_tracing(DatadogTracer(ddtrace.tracer))

pipe = Pipeline()
pipe.add_component("prompt_builder", ChatPromptBuilder())
pipe.add_component("llm", OpenAIChatGenerator())
pipe.connect("prompt_builder.prompt", "llm.messages")

messages = [
    ChatMessage.from_system(
        "Always respond in German even if some input data is in other languages.",
    ),
    ChatMessage.from_user("Tell me about {{location}}"),
]

response = pipe.run(
    data={
        "prompt_builder": {
            "template_variables": {"location": "Berlin"},
            "template": messages,
        },
    },
)
print(response["llm"]["replies"][0])
```

Each pipeline run produces a trace that includes the entire execution context, including prompts, completions, and metadata. You can then view the traces in your Datadog dashboard.

## Alternative: the DatadogConnector component

If you prefer to manage tracing as part of your pipeline definition (for example, so it serializes to YAML), you can add the `DatadogConnector` component instead. It enables the same Datadog tracing as soon as it is initialized.

:::info
See the [`DatadogConnector` documentation page](../../pipeline-components/connectors/datadogconnector.mdx) for full usage examples, or check out the [integration page](https://haystack.deepset.ai/integrations/datadog).
:::