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Description: - Connect two microservices belonging to stateless applications

The services hosted behind Istio service mesh has the sidecar proxy installed with each pod of the service. 

In the below diagram, 

SERVER - httpbin (If TLS Mode is "SIMPLE", it will accept both traffic for tls and plain text. TLS Mode must be ISTIO_MUTUAL for talking to other istio clients.  MUTUAL when talking to other external services) istio service which uses different rootca

CLIENTS - sleep (TLS Mode can be "SIMPLE" (for services with no sidecars) or ISTIO_MUTUAL(services with sidecars)).  MUTUAL when talking to other external services) or istio service which uses different rootca

MESH WIDE POLICY can be PERMISSIVE(Will allow both tls and plan text with no authorization checks on the plain text traffic) OR STRICT (Allow only TLS Traffic)

Diagram



NOTE - For this scenario, the default mesh wide policy must be set to "PERMISSIVE" on both the clusters. It will not work if the default Mesh Policy is "STRICT"

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