Kubernetes Admission Controllers: The Missing Layer Between API Requests and Your Cluster
Understand how Kubernetes Admission Controllers validate, modify and control requests before resources are created. Learn how they work, why they matter for cluster security, and how to configure them through practical examples.
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1. Introduction: Who Checks a Request Before Kubernetes Accepts It?
Imagine you’re working as a Kubernetes administrator in a company where several developers share the same cluster.
Each developer has permission to create and manage pods. Everything seems fine until someone deploys a container using an image from an untrusted public registry.
Another developer creates a pod that runs as the root user. Someone else forgets to add the required labels to a deployment.
17+ years of IT professional experience, focused on DevOps, DevSecOps, SRE, and cloud engineering. Goal is simple to make complex concepts easy to understand
