Kubernetes Admission Controllers: Your First Line of Defense

In the realm of Kubernetes security, Admission Controllers stand out as a formidable yet frequently underestimated defense mechanism. These controllers act as vigilant gatekeepers, intercepting requests to the API server before data is stored in etcd. By doing so, they offer a robust means to enforce tailored policies and seamlessly inject configurations. Whether the objective is to block privileged containers or ensure the presence of essential labels, Admission Controllers emerge as a pivotal element in fortifying Kubernetes clusters from within.

Understanding the Role of Admission Controllers

At the core of Kubernetes operations lie Admission Controllers, dynamic plugins tasked with overseeing and altering requests directed at the Kubernetes API server. These controllers come in two distinct forms: Validating Admission Controllers and Mutating Admission Controllers.