All 29 Multi-cluster questions
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How does ArgoCD manage multiple clusters? How do you add (register) an external cluster to ArgoCD? Can one ArgoCD instance deploy to the cluster it runs in and remote clusters simultaneously? How do you list registered clusters in ArgoCD? Do workloads keep running if the ArgoCD hub goes down? How do you remove a cluster from ArgoCD? What is the difference between the in-cluster and external cluster destinations? What are the architectural models for multi-cluster ArgoCD (hub-spoke vs per-cluster)? How are cluster credentials secured in ArgoCD? How do you target a subset of clusters (e.g., only production)?
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What is a management (hub) cluster in ArgoCD?

Beginner

Answer

The management or hub cluster is where the ArgoCD control plane runs and from which it deploys to other (spoke) clusters. It holds Application definitions and cluster credentials and pushes desired state outward, giving a single control point for the fleet.
Real-world example One hub cluster runs ArgoCD and deploys to five workload clusters across regions.

Common follow-ups: What runs on the hub? | What are spoke clusters?

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All 29 Multi-cluster questions