Wasm-based Telemetry

By default, telemetry generation is enabled as compiled-in Istio proxy filters. The same filters are also compiled to WebAssembly (Wasm) modules and shipped with Istio proxy. To enable telemetry generation with the Wasm runtime, install Istio with the preview profile:

$ istioctl install --set profile=preview

Alternatively, set the following two values to enable Wasm-based Telemetry with the default profile:

$ istioctl install --set values.telemetry.v2.metadataExchange.wasmEnabled=true --set values.telemetry.v2.prometheus.wasmEnabled=true
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