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heyitsgrace996 merged 2 commits into from
Dec 11, 2025
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Revise APM Instrumentation library injection details #33262

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Revise APM Instrumentation library injection details
heyitsgrace996 Dec 10, 2025
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Update content/en/containers/cluster_agent/admission_controller.md
heyitsgrace996 Dec 11, 2025
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10 changes: 6 additions & 4 deletions content/en/containers/cluster_agent/admission_controller.md
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{{% /tab %}}
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### Instrumentation library injection
You can configure the Cluster Agent (version 7.39 and higher) to inject instrumentation libraries. Read [Instrumentation library injection with Admission Controller][2] for more information.
### APM Instrumentation library injection
You can configure the Cluster Agent (version 7.39 and higher) to inject instrumentation libraries using Single Step Instrumentation. Read [Single Step APM Instrumentation][2] for more information.

If you do not want to use Single Step Instrumentation, the Datadog Admission Controller can be used to inject APM tracer libraries directly as a manual, pod-level alternative. Read [Local SDK Injection][7] for more information.

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### APM and DogStatsD
### APM and DogStatsD environment variable injection

To configure DogStatsD clients or other APM libraries that do not support library injection, inject the environment variables `DD_AGENT_HOST` and `DD_ENTITY_ID` by doing one of the following:
- Add the label `admission.datadoghq.com/enabled: "true"` to your Pod.
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{{< partial name="whats-next/whats-next.html" >}}

[1]: https://kubernetes.io/blog/2019/03/21/a-guide-to-kubernetes-admission-controllers/
[2]: /tracing/trace_collection/library_injection_local/
[2]: https://docs.datadoghq.com/tracing/trace_collection/automatic_instrumentation/single-step-apm/
[3]: https://docs.datadoghq.com/agent/kubernetes/apm/?tab=helm#setup
[4]: https://cloud.google.com/kubernetes-engine/docs/how-to/private-clusters#add_firewall_rules
[5]: https://docs.aws.amazon.com/vpc/latest/userguide/security-group-rules.html#security-group-rule-components
[6]: /containers/troubleshooting/admission-controller
[7]: https://docs.datadoghq.com/tracing/guide/local_sdk_injection/
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