DevOps Intermediate

GitOps — Patterns a Anti-patterns¶

GitOpsArgoCDFluxBest Practices 6 min read

GitOps architektonické vzory. Monorepo vs polyrepo, environment promotion, secrets management.

Repo Strategie¶

• App repo + Config repo (doporučeno)
• Monorepo — jednodušší pro malé týmy
• Repo per environment — maximální izolace

├── apps/
│   ├── api-gateway/
│   │   ├── base/
│   │   │   ├── deployment.yaml
│   │   │   ├── service.yaml
│   │   │   └── kustomization.yaml
│   │   └── overlays/
│   │       ├── dev/
│   │       ├── staging/
│   │       └── prod/
├── infrastructure/
│   ├── cert-manager/
│   └── monitoring/
└── clusters/
    ├── dev/
    ├── staging/
    └── prod/

Environment Promotion¶

1. CI buildne image → push s tagem (git SHA)
2. CI updatne image tag v overlays/dev/
3. GitOps sync do dev
4. Automatické testy
5. PR z dev do staging overlay
6. Review + merge → sync do staging
7. PR do prod → merge → sync do prod

Secrets v GitOps¶

• Sealed Secrets — šifrované v Gitu (Bitnami)
• SOPS — Mozilla SOPS s age/KMS
• External Secrets Operator — sync z Vault/AWS SSM/Azure KV

apiVersion: external-secrets.io/v1beta1
kind: ExternalSecret
metadata:
  name: api-keys
spec:
  refreshInterval: 1h
  secretStoreRef:
    name: azure-keyvault
    kind: ClusterSecretStore
  target:
    name: api-keys
  data:
    - secretKey: DATABASE_URL
      remoteRef:
        key: prod-database-url

Anti-patterns¶

• ❌ Ruční kubectl apply vedle GitOps → drift
• ❌ Secrets v plaintextu v Gitu
• ❌ Přeskakování environments
• ❌ Žádný drift detection
• ❌ Příliš velké PR — nereviwovatelné

Summary¶

GitOps vyžaduje disciplínu v repo struktuře, environment promotion a secrets managementu. Nikdy necommitujte secrets v plaintextu.

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