Understanding How Envoy Sidecar Intercept and Route Traffic in Istio Service Mesh
This article uses Istio’s official bookinfo example to explain how Envoy performs routing forwarding after the traffic entering the Pod and forwarded to Envoy sidecar by iptables, detailing the inbound and outbound processing. For a detailed analysis of traffic interception, see Understanding Envoy Sidecar Proxy Injection and Traffic Interception in Istio Service Mesh .
The following is a request flow diagram for bookinfo officially provided by Istio, assuming that the DestinationRule is not configured in all services of the bookinfo application.
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