What is the primary method of OneAgent injection in Kubernetes?

The primary method of OneAgent injection in Kubernetes is through webhook-based injection via the Dynatrace Operator. This approach leverages the Kubernetes admission controller functionality, which allows for the automatic injection of OneAgent into the containers as they are created.

Using the Dynatrace Operator simplifies the process of managing and deploying monitoring agents, as it automates the injection process without requiring manual intervention for each individual pod. When configured, the Operator monitors the Kubernetes cluster and listens for events such as the creation of new pods. Upon detecting a new pod, it automatically injects the OneAgent into the pod based on predefined settings, ensuring that each pod is consistently monitored without additional configuration steps.

This method enhances scalability and reduces the potential for human error that could occur with manual installation or configuration changes across multiple pods. Additionally, Kubernetes environments are often dynamic, with pods being created and destroyed frequently, so an automated injection method that seamlessly integrates into the Kubernetes lifecycle is essential for effective monitoring.

In contrast, manual installation on each pod would be labor-intensive and error-prone, container image modification to include agents could lead to increased image sizes and maintenance overhead, and command line installation would not cover dynamically created pods efficiently, making webhook-based injection the most efficient and effective solution.