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Scenario 01 - Considering microservice replication across multiple locations with replication within each cluster

Diagram

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Testing Steps

  1. Install ISTIO - Deploy istio control plane in each cluster. (NOTE - For testing use common root CA).  Reference
  2. Deploy the application is both the clusters as shown in the above figure. (NOTE - Make sure that the istio sidecars are injected to the Service pods)  For example use - server- httpbin, client - sleep
  3. Configure DNS - To provide resolution of service from remote clusters, istio uses its own DNS called istiocoredns which provides the resolution of remote istio services

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