Summary
ArgoCD is a CNCF project that implements GitOps continuous delivery for Kubernetes by continuously reconciling the live cluster state with the desired state defined in Git.
What is ArgoCD?
ArgoCD runs as a controller inside a Kubernetes cluster and monitors Git repositories for changes to application manifests. When it detects drift between the desired state in Git and the actual state in the cluster, it can automatically or manually synchronise them.
It supports Helm charts, Kustomize overlays, plain YAML manifests, and Jsonnet, giving teams flexibility in how they define their application configurations. ArgoCD provides a web UI and CLI that show the full deployment graph, health status of each resource, and sync history.
Multi-cluster management is a core capability: a single ArgoCD instance can deploy to multiple target clusters, with RBAC controlling which teams can deploy to which environments. ApplicationSets extend this further by templating deployments across many clusters.
Why is ArgoCD relevant?
- GitOps compliance: Git becomes the single source of truth for all deployed application state
- Auditability: Every deployment is traceable to a specific Git commit and user
- Self-healing: ArgoCD detects and can automatically correct configuration drift
- Developer experience: Visual deployment graph reduces time spent debugging rollout issues