Three-layer GitOps on K3s, in production
A 6-node K3s cluster as one git repo. Push to master, ArgoCD picks it up, nothing gets deployed by hand. Three layers, sync waves, and the parts that took longest to get right.
Kubernetes
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, …
Cert-Manager
Cert-Manager is a Kubernetes controller that automates issuance, renewal, and management of TLS certificates from multiple certificate authorities. Covers installation, issuers, ACME HTTP-01 and DNS-01 challenges, …
etcd
Distributed key-value store built on Raft, used as the cluster state store for Kubernetes. Covers install, single-node and three-node cluster setup, TLS, RBAC, backup/restore, tuning, and monitoring.
Helm
Package manager for Kubernetes that uses charts to define, install, and upgrade applications on clusters. Covers architecture, installation, command reference, chart structure, chart creation, values and templating, and …
K9s
Terminal UI for Kubernetes clusters. Covers install, navigation and resource commands, context and namespace switching, keyboard shortcuts, filtering, configuration files, plugins, skins, and troubleshooting.
Kind
Reference for Kind (Kubernetes in Docker): installing it, creating single and multi-node clusters, ingress, LoadBalancer, persistent volumes, networking, image loading, and CI/CD integration.
KubeCTL
Reference for kubectl, the command-line client for the Kubernetes API server: installation across platforms, kubeconfig setup, common resource and debugging commands, output formatting, and troubleshooting.
Longhorn
Longhorn is a distributed block storage system for Kubernetes providing persistent volumes with replication, snapshots, and backups. This guide covers installation, volume management, disaster recovery, performance …
MetalLB
MetalLB provides LoadBalancer-type services for bare-metal Kubernetes clusters using Layer 2 (ARP/NDP) or BGP advertisement. Covers installation, IP pool configuration, L2 and BGP setup, and troubleshooting.