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Can one ArgoCD instance deploy to the cluster it runs in and remote clusters simultaneously? What is a management (hub) cluster in ArgoCD? How do you list registered clusters in ArgoCD? Do workloads keep running if the ArgoCD hub goes down? 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)? How do cluster labels help manage a fleet? What connectivity does the hub need to spoke clusters?
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How do you remove a cluster from ArgoCD?

Beginner

Answer

Use `argocd cluster rm <server-or-name>` or delete its cluster Secret. First ensure no Applications target it (or they'll go Unknown/fail). Removing the Secret revokes ArgoCD's access and drops it from the destinations list.
argocd cluster rm prod-eu
Real-world example A decommissioned cluster is removed after migrating its apps, cleaning up its credentials.

Common follow-ups: What should you do before removing a cluster? | What does removal revoke?

Applications RBAC Multi-cluster
All 29 Multi-cluster questions