All 29 Multi-cluster questions
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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)? 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 onboard a new cluster into an existing GitOps setup? How do you deploy different app versions to different clusters (e.g., staged rollout)? How do you view aggregated application status across clusters?
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How do cluster labels help manage a fleet?

Intermediate

Answer

Cluster secrets can carry labels (env, region, tier) that ApplicationSet cluster generators select on, so you target subsets and auto-include new matching clusters. Labels turn the fleet into queryable groups for placement decisions.
metadata:
  labels: { env: prod, region: eu }
Real-world example Labeling clusters env=prod lets one ApplicationSet deploy only to production clusters automatically.

Common follow-ups: Where are cluster labels set? | How do generators use them?

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All 29 Multi-cluster questions