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• Lyft built Envoy as an internal technology to publish services out to their consumers both internal and external.
• Envoy is built to be fast, scalable, comprehensive, dynamically configurable, extensible, and observable.
• Envoy works with a dynamic control plane, allowing for policies to be served up dynamically to the proxy without having to balance anything.
• Envoy is built on a filter chain architecture, allowing for various policies and routing techniques to be applied to requests.
• Envoy produces access logs on each request, which are valuable for debugging and monitoring purposes.