package opentelemetry-client-ocurl

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Collector client for opentelemetry, using http + ocurl

Install

Dune Dependency

Authors

Maintainers

Sources

v0.3.tar.gz
md5=aa5caa75abb2dd3b8777aec10f69b220
sha512=63538c716f4938a756b0a2fd89edf213bc4fdd636d0f08473cd822da25f751fc3b4faf57926f45edc2e3df4bd51f04ff10e8eed205f05d8be154dcd848166443

Description

Published: 08 Jul 2022

README

Opentelemetry

This project provides an API for instrumenting server software using opentelemetry, as well as connectors to talk to opentelemetry software such as jaeger.

  • library opentelemetry should be used to instrument your code and possibly libraries. It doesn't communicate with anything except a backend (default: dummy backend)

  • library opentelemetry-client-ocurl is a backend that communicates via http+protobuf with some collector (otelcol, datadog-agent, etc.)

Features

  • [x] basic traces

  • [x] basic metrics

  • [x] basic logs

  • [ ] nice API

  • [x] interface with lwt

  • [x] sync collector relying on ocurl

    • [x] batching, perf, etc.

  • [ ] async collector relying on ocurl-multi

  • [ ] interface with logs (carry context around)

Use

For now, instrument manually:

module Otel = Opentelemetry
let (let@) f x = f x

let foo () =
  let@ scope = Otel.Trace.with_  "foo"
      ~attrs:["hello", `String "world"] in
  do_work();
  Otel.Metrics.(
    emit [
      gauge ~name:"foo.x" [int 42];
    ]);
  do_more_work();
  ()

let main () =
  Otel.Globals.service_name := "my_service";
  Otel.GC_metrics.basic_setup();

  Opentelemetry_client_ocurl.with_setup () @@ fun () ->
  (* … *)
  foo ();
  (* … *)

Configuration

The library is configurable via Opentelemetry.Config, via the standard opentelemetry env variables, or with some custom environment variables.

  • OTEL_EXPORTER_OTLP_ENDPOINT sets the http endpoint to send signals to

  • OTEL_OCAML_DEBUG=1 to print some debug messages from the opentelemetry library ide

  • OTEL_RESOURCE_ATTRIBUTES sets a comma separated list of custom resource attributes

Collector opentelemetry-client-ocurl

This is a synchronous collector that uses the http+protobuf format to send signals (metrics, traces) to some other collector (eg. otelcol or the datadog agent).

License

MIT

Semantic Conventions

Not supported yet.

Dependencies (7)

  1. ocurl
  2. pbrt >= "2.2"
  3. ocaml-protoc >= "2.2"
  4. opentelemetry = version
  5. mtime >= "1.4"
  6. ocaml >= "4.08"
  7. dune >= "2.7"

Dev Dependencies (1)

  1. odoc with-doc

Used by

None

Conflicts

None

OCaml

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