Argo CD — Declarative GitOps Continuous Delivery for Kubernetes

What it is

Argo CD is a declarative GitOps continuous delivery tool for Kubernetes. It watches Git repositories containing your application manifests and automatically syncs them to your Kubernetes clusters. When someone pushes a change to the Git repo, Argo CD detects the diff, shows you what will change, and applies it. It supports Helm charts, Kustomize, plain YAML, and Jsonnet.

Argo CD targets platform teams and DevOps engineers who want Git as the single source of truth for their Kubernetes deployments. Instead of running kubectl apply manually or building custom CI/CD pipelines, Argo CD handles the deployment lifecycle declaratively.

Why it saves time or tokens

Manual Kubernetes deployments require running kubectl commands, tracking what version is deployed where, and hoping nobody made undocumented changes. Argo CD eliminates drift by continuously reconciling cluster state with Git. Rollback is instant: revert the Git commit and Argo CD redeploys the previous version. For AI-assisted infrastructure management, Argo CD reduces deployment to a Git push, which is simpler than generating kubectl commands.

How to use

1. Install Argo CD in your cluster: kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
2. Create an Application resource pointing at your Git repo and target cluster
3. Argo CD syncs your manifests and shows deployment status in the web UI

Example

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: web-app
  namespace: argocd
spec:
  project: default
  source:
    repoURL: https://github.com/myorg/k8s-manifests.git
    targetRevision: main
    path: apps/web-app
  destination:
    server: https://kubernetes.default.svc
    namespace: production
  syncPolicy:
    automated:
      prune: true
      selfHeal: true

Related on TokRepo

• AI tools for devops — DevOps and Kubernetes tooling on TokRepo
• AI tools for automation — deployment automation and CI/CD tools

Common pitfalls

• Enabling auto-sync with prune: true deletes resources removed from Git; test this in staging before production
• Argo CD manages the deployment, not the build; you still need a CI system (GitHub Actions, Jenkins) to build images
• Secrets in Git repos must be encrypted (Sealed Secrets, SOPS, or External Secrets Operator); never commit plaintext secrets