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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? What are the failure and resilience considerations for multi-cluster ArgoCD? How does ArgoCD scale to hundreds of clusters and applications? How do you handle credentials rotation for many clusters? How do you achieve high availability for the ArgoCD control plane? How do you isolate tenants across clusters? How does controller sharding distribute cluster load?
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How do you handle per-cluster configuration differences?

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Answer

Parameterize by cluster: use ApplicationSet generator values (cluster name, labels, region) injected into templates, per-cluster Helm values or Kustomize overlays selected by cluster, and cluster labels to drive which apps deploy where. This keeps a shared base while allowing region- or size-specific settings per cluster.
template:
  spec:
    source:
      helm:
        valueFiles: ['values-{{metadata.labels.region}}.yaml']
Real-world example Each cluster picks a region-specific values file, so EU and US clusters get appropriate endpoints and sizes from one template.

Common follow-ups: How do you inject cluster metadata into config? | How do labels drive placement?

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