The application of Wasm has already started expanding in cloud-native infrastructure to Kubernetes, Envoy Proxy, and Envoy based solutions like Istio and Gloo.
In particular, the Envoy project has been working to integrate and stabilize the use of Wasm as the model going forward for extensibility. Envoy is popular for its cloud-native architecture, performance, and that it can be extended in many ways through the use of filters, tracers, monitors, and more. Specifically, the filters are what’s used to modify the behavior of the proxy to manipulate the traffic that flows through it. The proxy ships with some filters out-of-the-box and with the open nature of Envoy, any end user can write and add their own filter to extend Envoy.