Modern GitOps Practices

GitOps Engine Comparison

FluxCD vs ArgoCD Feature Matrix

features:
  - name: "Multi-tenancy"
    flux: "Native support"
    argo: "Namespaced projects"
  
  - name: "Drift Detection"
    flux: "Automated reconciliation"
    argo: "Manual sync options"

  - name: "Policy Enforcement"
    flux: "Kyverno native"
    argo: "OPA/Gatekeeper"

Modern Implementation

Flux Example

apiVersion: source.toolkit.fluxcd.io/v1
kind: GitRepository
metadata:
  name: production-apps
  namespace: flux-system
spec:
  interval: 1m
  url: https://github.com/org/apps
  ref:
    branch: main
  secretRef:
    name: github-credentials
---
apiVersion: kustomize.toolkit.fluxcd.io/v1
kind: Kustomization
metadata:
  name: applications
  namespace: flux-system
spec:
  interval: 10m
  path: "./environments/production"
  prune: true
  sourceRef:
    kind: GitRepository
    name: production-apps
  healthChecks:
    - apiVersion: apps/v1
      kind: Deployment
      name: frontend
      namespace: default

Progressive Delivery

Flagger Configuration

apiVersion: flagger.app/v1beta1
kind: Canary
metadata:
  name: app-canary
spec:
  targetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: app
  service:
    port: 8080
  analysis:
    interval: 1m
    threshold: 10
    maxWeight: 50
    stepWeight: 5
    metrics:
    - name: request-success-rate
      thresholdRange:
        min: 99
      interval: 1m
    - name: request-duration
      thresholdRange:
        max: 500
      interval: 1m

Security Integration

Image Policy

apiVersion: image.toolkit.fluxcd.io/v1beta2
kind: ImagePolicy
metadata:
  name: secure-policy
spec:
  imageRepositoryRef:
    name: app-repository
  policy:
    securityScanning:
      enabled: true
      severity: high
    signatureVerification:
      required: true

Best Practices

1. Declarative Configuration

   • Infrastructure as Code

   • Application manifests

   • Policy definitions

   • Security controls

2. Automation Strategy

   • Continuous reconciliation

   • Drift detection

   • Automatic remediation

   • Progressive delivery

3. Security Controls

   • Image scanning

   • Policy enforcement

   • RBAC integration

   • Audit logging