Single Step APM Instrumentation on Linux

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Overview

On a Linux host or VM, use Single Step Instrumentation (SSI) for APM to install the Datadog Agent and instrument your applications in one step, with no additional configuration required.

Enable APM on your applications

Before proceeding, confirm that your environment is compatible by reviewing the SSI compatibility guide.

To enable APM on a Linux host:

In Datadog, go to the Install the Datadog Agent on Linux page.
In the Customize your observability coverage section, go to Additional features > Application Observability, and turn on APM Instrumentation.
Copy and run the Agent installation command on your Linux host or VM.
Restart your applications.

Set SDK tracer versions

By default, Single Step Instrumentation installs the latest versions of Datadog APM SDKs.

You may want to choose specific SDK versions for compatability with your application’s language version or specific environment requirements.

To customize SDK versions:

In Datadog, go to the Install the Datadog Agent on Linux page.

After you turn on APM Instrumentation, set your desired library versions with the DD_APM_INSTRUMENTATION_LIBRARIES variable in your Agent installation command:

DD_API_KEY=<YOUR_DD_API_KEY> 
DD_SITE="US1-FED" 
DD_APM_INSTRUMENTATION_ENABLED=host 
DD_APM_INSTRUMENTATION_LIBRARIES="java:1,python:2,js:5,dotnet:3,php:1" 
bash -c "$(curl -L https://install.datadoghq.com/scripts/install_script_agent7.sh)"

Find your language(s) and use the dropdown to either:
- Select an exact SDK version, or
- Select the major version, which uses the latest minor release available when the Agent installation command is run.
Copy and run the updated installation command.

Available versions are listed in source repositories for each language:

Java (java)
Node.js (js)
Python (python)
.NET (dotnet)
Ruby (ruby)
PHP (php)

Configure Unified Service Tags

Unified Service Tags (USTs) apply consistent tags across traces, metrics, and logs, making it easier to navigate and correlate your observability data. Learn how to set USTs for Linux services.

Enable SDK-dependent products and features

After SSI loads the Datadog SDK into your applications and enables distributed tracing, you can configure additional products that rely on the SDK. These include capabilities such as Continuous Profiler, Application Security Monitoring, and trace ingestion controls.

Use one of the following setup methods:

Configure in application_monitoring.yaml:
Enable products across all services on a host without modifying application command lines.
Set environment variables:
Enable products by setting environment variables directly in your application configuration.