Summary
In this chapter, we read about how to manage external traffic coming inside the Service Mesh using the Istio Ingress gateway, as well as how to manage internal traffic leaving the mesh via Istio Egress gateways.
We learned about virtual services and destination rules: how virtual services are used to describe the rules to route traffic to various destinations in the mesh, how destination rules are used to define the end destination, and how the destination processes the traffic routed via rules defined by virtual services. Using virtual services, we can perform weight-based traffic routing, which is also used for canary releases and blue-green deployment.
Additionally, we learned about ServiceEntry and how it is used to make Istio aware of external services so that workloads in the mesh can send traffic to services outside the mesh. And finally, we learned how Egress gateways are used to control the Egress to endpoints defined by ServiceEntry so that we can access external...