filebeat/inputs/http_endpoint - Add input metrics

[andrewkroh]

Describe the enhancement:

Instrument the http_endpoint input with metrics and expose them through the /inputs/ http route. In addition to metrics about the request/response we should include some data about the config that's useful for identification purposes like the bind_address, route, and whether TLS is required.

Describe a specific use case for the enhancement or feature:

This will be used for monitoring the behavior of the http_endpoint input.

Related

• https://opentelemetry.io/docs/specs/otel/metrics/semantic_conventions/http-metrics/
• httpjson http client metrics (code) (docs)

[elasticmachine]

Pinging @elastic/security-external-integrations (Team:Security-External Integrations)