Istio's Envoy sidecar proxy
The evolution of the sidecar has been taking place over the last couple of years. The popular among them are Lyft's Envoy and Buoyant's Linkerd.
Lyft's Envoy creator is Matt Klein. Envoy is used by Istio, AWS App Mesh, and Ambassador. Netflix has built its own proxy, called Prana, but it is not open source, so it is out of the scope of this book.
Nginx has been a very popular sidecar proxy that provides load balancing, rate limits, TLS offloading, traffic split, traffic distribution, and A/B testing. Modern sidecar proxies such as Envoy and Linkerd are well optimized and have a small footprint so that they work well with individual microservices as a sidecar, whereas Nginx fits well in front of the entire microservices ...
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