Ingress controller
Kubernetes' Ingress controller is an edge infrastructure that transmits all external web traffic and forwards it to the designated microservice running inside the cluster. You configure access by creating a collection of rules that define which inbound connections reach which services.
Unlike Istio, Linkerd does not provide an Ingress controller. Instead, it piggybacks on an existing Ingress controller that comes with your Kubernetes providers, such as public cloud (Google, AWS, Azure, IBM, and so on) or on-premises implementations such as RedHat OpenShift or the Pivotal Container Service. In this book, we will build our own Nginx Ingress Controller in the next chapter.
Linkerd discovers services based on the authority ...
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