Description: The AdmissionController of Kubernetes is a critical component that acts as an intermediary between user requests and the Kubernetes API server. Its primary function is to intercept and validate requests for creating, updating, or deleting resources in the cluster, allowing for the application of security policies and access control before changes are made to the cluster’s state. This mechanism is essential for ensuring that configurations and resources comply with the standards set by system administrators. AdmissionControllers can modify incoming requests, reject them, or even add additional information to the objects being created or modified. This allows administrators to implement security policies, such as injecting labels or annotations, and ensure that resources adhere to organizational best practices and standards. Furthermore, its modular architecture allows different controllers to be enabled or disabled according to the specific needs of the cluster, providing flexibility and customization in resource management within container orchestration systems.
