GitOps shifts the source of truth for cluster state into version control. Combined with Argo CD, teams gain auditability, drift detection, and consistent rollouts across environments.
CI still builds and tests artifacts; CD becomes reconciliation. Argo CD continuously compares desired state in Git with live cluster state and either syncs automatically or waits for promotion policies you define.
The real leap happens when GitOps is paired with progressive delivery—canaries, blue/green, and automated rollbacks tied to SLOs. Tools like Argo Rollouts complement Argo CD without abandoning the declarative model.
Repository structure decides whether GitOps scales. Separate app config from platform config, prefer app-of-apps or ApplicationSets for multi-tenant clusters, and keep secrets out of plain Git—use sealed secrets, SOPS, or an external secrets operator.
Platform teams should standardize Helm or Kustomize patterns so product squads consume Kubernetes as a self-service product. Golden paths beat ticket queues.
Observability is part of the contract: every sync should leave traces, every failed sync should page the right owner, and drift should be visible before it becomes an incident.
Start with non-production clusters, prove promotion workflows, then expand. GitOps succeeds when developers trust the path to production—and when security can reconstruct every change from Git history.