ArgoCD
ArgoCD is a declarative GitOps tool for Kubernetes that automatically synchronizes cluster states with Git repositories.
What Is ArgoCD?
ArgoCD is a declarative continuous delivery tool for Kubernetes that follows the GitOps principle: Git is the single source of truth for the desired cluster state. ArgoCD monitors Git repositories and automatically ensures that the cluster state matches the declared manifests.
How Does ArgoCD Work?
You define the desired state of your Kubernetes resources in a Git repository – as YAML manifests, Helm Charts, or Kustomize overlays. ArgoCD monitors this repository and compares the desired state with the actual state in the cluster. When deviations occur, ArgoCD can automatically sync or notify you.
Core Concepts
- Application: A mapping between a Git source and a Kubernetes target cluster
- Sync: The process of aligning the cluster state with the Git state
- Health: ArgoCD evaluates the health status of each Kubernetes resource
- Drift Detection: Automatic detection when the cluster state differs from the Git state
ArgoCD and GitOps
GitOps is an operational framework where Git repositories describe the entire infrastructure and application state. ArgoCD is the most popular GitOps implementation for Kubernetes and offers a web UI, CLI, and API for managing deployments.
Deployment Strategies
ArgoCD supports various deployment strategies through Argo Rollouts: Blue-Green, Canary with automated analysis, and Progressive Delivery. Integration with Prometheus enables automated canary analyses based on real metrics.
Multi-Cluster Management
ArgoCD manages any number of Kubernetes clusters from a central instance. This is especially valuable for multi-cloud setups or separating staging and production environments. ApplicationSets automate deployment across multiple clusters.
Best Practices
- Separate app repositories from config repositories (App of Apps pattern)
- Use Sealed Secrets or External Secrets Operator for secrets in Git
- Configure RBAC policies for team-specific access rights
- Enable automatic pruning only for non-critical environments
- Use sync waves for ordered deployments with dependencies
Why devRocks?
We implement ArgoCD as a central GitOps platform for your Kubernetes setup. From initial installation to RBAC configuration to integration into your CI/CD pipeline, we ensure your deployments are reliable, traceable, and automated.
Frequently asked questions about ArgoCD
Both are GitOps tools for Kubernetes. ArgoCD offers an extensive web UI and multi-cluster management out-of-the-box. Flux is more lightweight and relies more on Kubernetes-native CRDs. Both are CNCF projects.
Yes, ArgoCD complements CI pipelines: the CI pipeline builds and tests, ArgoCD deploys. This separation improves security and traceability, as only ArgoCD accesses the cluster.
Secrets must never be stored unencrypted in Git. Use Sealed Secrets, SOPS, or the External Secrets Operator to securely load secrets from Vault, AWS Secrets Manager, or Azure Key Vault.
Yes, ArgoCD supports Helm Charts, Kustomize, YAML manifests, and Jsonnet as source formats. Helm values can be configured per environment using ApplicationSets.
Related terms
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Last updated: April 2026