FluxCD
ELI5 — The Vibe Check
FluxCD is ArgoCD's quieter, more Kubernetes-native sibling. No fancy UI — it's all CRDs and controllers living inside your cluster. If ArgoCD is a flashy sports car, FluxCD is a reliable electric sedan that just gets you there.
Real Talk
FluxCD is a CNCF graduated GitOps toolkit that keeps clusters in sync with configuration sources using Kubernetes controllers (source-controller, kustomize-controller, helm-controller). Fully declarative via CRDs, supports multi-tenancy and progressive delivery.
When You'll Hear This
"FluxCD reconciles our cluster state every 5 minutes from the Git repo." / "We prefer Flux over Argo because everything is a CRD."
Related Terms
ArgoCD
ArgoCD watches your Git repo and automatically syncs your Kubernetes cluster to match. Change a YAML file, and ArgoCD deploys it.
GitOps
GitOps is the idea that git is the single source of truth for EVERYTHING — your code, your infrastructure config, your deployment state.
Helm
Helm is the package manager for Kubernetes — like npm but for deploying apps to your cluster.
Kubernetes
Kubernetes is a robot manager for your containers.