Argo CD
Argo CD is a declarative GitOps continuous delivery tool for Kubernetes that syncs application state from Git repositories to clusters. Covers architecture, installation, application deployment, sync policies, …
Argocd
A GitOps Kubernetes cluster, layer by layer
The full writeup: a 6-node K3s HA cluster bootstrapped from one git repo - install, Calico/MetalLB/Traefik/Longhorn, ArgoCD app-of-apps, Vault + AVP secrets, three-layer sync ordering, and day-to-day operations.