ArgoCD — GitOps Done Right

We used GitOps with Flux for a year. It worked, but we lacked a visual overview. ArgoCD from Intuit (now CNCF) solves both and adds an excellent web UI.

Why ArgoCD Instead of Flux¶

• Web UI — graphical deployment overview, diff view, one-click rollback
• Multi-cluster — one ArgoCD for multiple clusters
• SSO integration — OIDC, LDAP, GitHub
• Helm + Kustomize + YAML — supports everything

Application CRD¶

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: api-server
spec:
  destination:
    server: https://kubernetes.default.svc
    namespace: production
  source:
    repoURL: https://git.core.cz/deployments
    path: apps/api-server
    targetRevision: main
  syncPolicy:
    automated:
      prune: true
      selfHeal: true

Sync Waves and Hooks¶

ArgoCD supports ordering — CRDs before controllers, migrations before the application. Pre-sync and post-sync hooks for complex deployment scenarios.

Multi-Cluster Management¶

One ArgoCD in the management cluster manages deployments to dev, staging, and production clusters. Centralized overview, unified audit trail.

ArgoCD Is Our New Standard for CD¶