Automatic instrumentation for Next.js integrated server (instrumentation-http server request metrics)

[mhoran]

Is your feature request related to a problem? Please describe

@opentelemetry/instrumentation-http automatically instruments built-in Node http server requests. However, the Next.js integrated server does not seem to use the built-in http server. As such, http.server.request.duration metrics are not collected.

Describe the solution you'd like to see

It is possible to use a custom server that does use the built-in Node http server. When this server is used, metrics will be collected. See https://github.com/mhoran/next-instrumentation.

Spans are created for the Next.js integrated server, but metrics are not collected. I would like a way to auto-instrument the Next.js integrated server similarly to the built-in Node http server. This will reduce configuration and improve the out-of-the-box Next.js experience.

Describe alternatives you've considered

Using a custom server as shown in https://github.com/mhoran/next-instrumentation works. However, this is not ideal, since there are downsides to using a custom server with Next.js.

Additional context

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