5 — Operator Framework

Kubernetes

A book-shaped table of contents for Kubernetes: cloud-native foundations, the CKAD/CKA/CKS certification tracks, control-plane internals, platform tooling, multi-cluster architecture, and MAANG-level system design and interview prep — cross-linking the existing Prometheus, Observability, and Platform Engineering chapters instead of duplicating them.

3 — Argo CD

Argo CD's pull-based reconciliation means the cluster fetches its own desired state from Git, so a compromised CI pipeline never gets a credential that can write to the cluster.

4 — Flux

Flux splits GitOps into composable controllers — source, kustomize, and notification — so drift detection and reconciliation are independent concerns instead of one monolithic sync job.

1 — Helm

Helm's Go-template-over-YAML approach turns configuration into string manipulation instead of structured data, trading type safety for reusability across charts.

2 — Kustomize

Kustomize edits valid YAML with strategic-merge patches instead of templating it, so every intermediate step stays parseable and diffable.