Kubernetes

1. Cluster Architecture

   Control plane components (API server, etcd, scheduler, controller manager), kubelet, nodes, and the reconciliation loop.

2. Objects, Labels and Namespaces

   Declarative object spec and status, labels and selectors, annotations, namespaces, and kubectl apply.

3. Pods

   Pod lifecycle, containers, init and sidecar containers, restart policy, and probes.

4. Workload Controllers

   Deployments, ReplicaSets, rolling updates and rollbacks, StatefulSets, DaemonSets, Jobs, and CronJobs.

5. Services and Networking

   ClusterIP, NodePort, LoadBalancer services, DNS, endpoints, kube-proxy, and cluster networking model.

6. Ingress and Gateway API

   HTTP routing into the cluster with Ingress resources, ingress controllers, TLS, and Gateway API.

7. Network Policies

   Pod-level ingress and egress traffic rules, selectors, and default deny.

8. ConfigMaps and Secrets

   Injecting configuration as env vars or volumes, Secrets types, and encryption at rest.

9. Resource Requests and Limits

   CPU and memory requests and limits, QoS classes, LimitRange, and ResourceQuota.

10. Storage

    Volumes, PersistentVolumes and Claims, StorageClasses, dynamic provisioning, and access modes.

11. Scheduling and Eviction

    Node selectors, affinity and anti-affinity, taints and tolerations, topology spread, priority, and preemption.

12. Probes and Health Checks

    Liveness, readiness, and startup probes and their effect on restarts and traffic.

13. Autoscaling

    Horizontal Pod Autoscaler, Vertical Pod Autoscaler, and cluster autoscaling based on metrics.

14. RBAC and Service Accounts

    Roles, ClusterRoles, bindings, subjects, service accounts, and API authorization.

15. Pod Security and Cluster Security

    Pod Security Standards, security contexts, admission control, and secrets hygiene.

16. Extending Kubernetes

    CustomResourceDefinitions, custom controllers and operators, and admission webhooks.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.

Source: endoflife.date

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