Argocd

About Argocd

Argo CD is an open-source GitOps continuous delivery tool for Kubernetes, created at Intuit in 2018 and donated to the CNCF in 2020, where it became a graduated project in 2022. Argo CD's core principle is GitOps: Git is the single source of truth for Kubernetes cluster state. Argo CD continuously monitors Git repositories containing Kubernetes manifests (YAML, Helm charts, Kustomize, Jsonnet) and automatically syncs clusters to match the desired state declared in Git, detecting and optionally auto-healing drift. Argo CD's Application CRD defines what to deploy (source repo, path, branch/tag) and where (target cluster and namespace), creating a declarative deployment unit. Argo CD's UI provides a live application dependency graph showing the health and sync status of every Kubernetes resource (Deployment, Service, ConfigMap, PVC) in the application. Argo CD supports multi-cluster deployments — a single Argo CD instance can manage dozens of clusters, with RBAC controlling which teams can sync to which clusters. ApplicationSets automate creating Argo CD Applications across multiple clusters, namespaces, or Git repos using template generators (cluster, list, git directory, pull request). Argo Rollouts (companion project) adds progressive delivery: canary deployments, blue/green, and analysis-based automated promotion. Argo Workflows and Argo Events round out the Argo project ecosystem for CI and event-driven automation. Argo CD is used at Intuit, Red Hat, Tesla, Adobe, and most Kubernetes-native engineering organizations. Its adoption has made it the de-facto standard for Kubernetes GitOps continuous delivery.