Answer
Cross-cluster discovery, routing, failover, and policy require abstractions beyond core Kubernetes.
Quick Answer
Each cluster is an isolated control plane — Pods in cluster A can't directly discover or communicate with Services in cluster B. Multi-cluster networking (Submariner, Cilium Cluster Mesh) creates cross-cluster service discovery and connectivity. Service meshes (Istio multi-cluster) extend traffic management across clusters. Federation (KubeFed) synchronizes resources across clusters.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ