The "difficult sibling" of Deployments. Used for stateful applications (databases like Cassandra, MySQL). Provides sticky identities, persistent storage, and ordered deployment.
Where most production outages happen.
Reading a list online is one thing. Having a searchable, offline, diagram-rich PDF is another. The "difficult sibling" of Deployments
You cannot memorize 50 complex interactions overnight. When you are debugging a crash-loop backoff at 2 AM, you do not want to scroll through ads or vague documentation. You need a cheat sheet that tells you:
Our 50 Kubernetes Concepts PDF includes: Our 50 Kubernetes Concepts PDF includes: Not a Service
Not a Service. An API object that manages external access to services (usually HTTP). Provides SSL termination, path-based routing (domain.com/api vs domain.com/app), and name-based virtual hosting.
The source of truth. A highly available key-value store that holds the entire state of your cluster. Lose etcd, lose the cluster. MySQL). Provides sticky identities
The front door. Everything you do (kubectl, GUI, automation) talks to the API Server. It validates and configures data for the etcd database.
Unlike Docker volumes, Kubernetes storage is cluster-aware.
Kubernetes networking is notorious. Flannel, Calico, Cilium, oh my!