Blog/DevOps

GitOps with ArgoCD 2026: Everything You Need to Know

SynfraCore·April 2026·10 min read

What is GitOps?

GitOps is a simple but powerful idea: Git is the single source of truth for your infrastructure and applications. Every configuration change goes through a Git pull request. Nothing is changed directly in the cluster. ArgoCD continuously watches Git and reconciles the cluster to match.

Why GitOps Changes Everything

Before GitOps: Engineers kubectl apply directly in production. Changes are not tracked. Rollback means remembering what you changed. Environments drift apart.

With GitOps: Every change is a Git commit. Full audit trail. Rollback is git revert. If someone manually changes the cluster, ArgoCD detects and reverts it.

Install ArgoCD on Kubernetes

bash

kubectl create namespace argocd
kubectl apply -n argocd \
  -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml

# Get admin password
kubectl get secret argocd-initial-admin-secret -n argocd \
  -o jsonpath='{.data.password}' | base64 -d

# Access UI
kubectl port-forward svc/argocd-server -n argocd 8080:443
# Open: https://localhost:8080

Create Your First Application

yaml

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: myapp-production
  namespace: argocd
spec:
  project: default
  source:
    repoURL: https://github.com/org/myapp-config
    targetRevision: main
    path: overlays/production
  destination:
    server: https://kubernetes.default.svc
    namespace: production
  syncPolicy:
    automated:
      prune: true       # delete resources removed from Git
      selfHeal: true    # revert manual cluster changes
    syncOptions:
    - CreateNamespace=true

Sync vs OutOfSync vs Drift

Synced: Cluster matches Git exactly.

OutOfSync: Cluster differs from Git — someone applied something manually, or a new commit was pushed.

Drift: When cluster state diverges from Git without a commit. With selfHeal: true, ArgoCD detects and reverts drift within 3 minutes.

The Rollback Advantage

bash

# Find last good commit
git log --oneline overlays/production/

# Revert to it
git revert HEAD~1
git push
# ArgoCD detects the push and rolls back within 3 minutes
# No kubectl commands needed — Git does it all

See ArgoCD Academy for hands-on GitOps labs.

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