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CI/CD & DevOps11 min readPublished: 2026-09-12

GitOps with ArgoCD: Declarative Continuous Delivery on Kubernetes

Implement declarative GitOps: automated drift detection, self-healing synchronizations, and progressive canary rollouts using ArgoCD and Argo Rollouts.

CPL

CloudPlatformLabs Engineering

Platform Architecture Team

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1. The GitOps Paradigm Shift

In traditional push-based CI/CD pipelines, runner agents require high-privilege administrative access (`cluster-admin` kubeconfig) to the production Kubernetes API. If the CI runner is compromised, the entire cluster is vulnerable.

GitOps inverts this paradigm: an operator running inside the cluster (ArgoCD) continuously pulls the declarative state stored in Git. If someone manually changes a live deployment via `kubectl edit`, ArgoCD detects the configuration drift and immediately reconciles live state back to what is committed in Git.

argocd-app.yaml
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: cloudplatformlabs-frontend
  namespace: argocd
spec:
  project: default
  source:
    repoURL: 'https://github.com/cloudplatformlabs/infrastructure-manifests.git'
    targetRevision: HEAD
    path: k8s/production
  destination:
    server: 'https://kubernetes.default.svc'
    namespace: production
  syncPolicy:
    automated:
      prune: true
      selfHeal: true
    syncOptions:
      - CreateNamespace=true

2. Progressive Delivery with Argo Rollouts

Standard Kubernetes rolling deployments do not support traffic splitting or automatic rollback based on real-time Prometheus error rates. Argo Rollouts introduces Canary step weighting and automated metric analysis.

argo-rollout.yaml
apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata:
  name: billing-api
spec:
  replicas: 10
  strategy:
    canary:
      steps:
      - setWeight: 10
      - pause: {duration: 10m}
      - setWeight: 25
      - pause: {duration: 15m}
      - setWeight: 50
      - pause: {duration: 10m}

Related Topics & Tags

GitOpsArgoCDKubernetesDevOpsContinuous Delivery
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Written by CloudPlatformLabs Engineering

Platform Architecture Team

CloudPlatformLabs publishes independent, peer-reviewed cloud and DevOps architecture blueprints, hands-on tutorials, and infrastructure case studies. Our mission is to make advanced infrastructure engineering transparent, resilient, and developer-friendly.

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