All 29 Multi-cluster questions
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How do cluster labels help manage a fleet? What connectivity does the hub need to spoke clusters? How do you deploy region-specific configuration to clusters? What is the difference between targeting a cluster by server URL vs name? How do you deploy different app versions to different clusters (e.g., staged rollout)? How do you view aggregated application status across clusters? Can you run ArgoCD per cluster instead of a central hub, and why? How do you deploy the same application to many clusters efficiently? How do you handle per-cluster configuration differences? What are the failure and resilience considerations for multi-cluster ArgoCD?
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ArgoCD › Multi-cluster

How do you onboard a new cluster into an existing GitOps setup?

Intermediate

Answer

Register the cluster (Secret with proper labels), and if using ApplicationSet cluster generators, matching apps deploy automatically. With App of Apps, add a root for the cluster. Labeling correctly ensures the right app set lands without hand-writing each Application.
argocd cluster add new-ctx
# label it so generators pick it up
Real-world example Adding and labeling a new cluster causes the standard platform apps to deploy to it with no extra manifests.

Common follow-ups: What makes onboarding automatic? | Why label at registration?

Applications App of Apps Multi-cluster
All 29 Multi-cluster questions