package prometheus

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Client library for Prometheus monitoring






v1.2 (2022-06-16)

  • Add lwt collectors and pre-collectors (@killian-delarue, #43). Note that this is a temporary feature while we wait for OCaml 5 to be released, when this can be replaced by the use of effects.

  • Fix deprecations in Fmt 0.8.10 (@MisterDA, #36).

  • General build updates, upstream deprecations, etc (@talex5, #33 #34 #35 #40 #42).

v1.1 (2021-06-08)

  • Allow using a custom formatter for log output (@MisterDA #31). Windows services crash if they try to use stderr.

v1.0 (2020-12-22)

  • Add logging configuration (#29, @talex5).
    To configure a server to report counts for log messages:

    let () = Prometheus_unix.Logging.init ()

    This installs a reporter that reports the number of messages logged by each log source and at each level. The reporter also displays the timestamp and log source with each message, which is a more suitable configuration for servers.

  • Add bounds on cohttp to prepare for cohttp 3 release (#28, @talex5).

v0.7 (2020-03-03)

  • switch float representation to OCaml's default "%f" (#22, @toots)

  • use Gc.quick_stat for faster stats (#25, @talex5)

v0.6 (2019-11-23)

  • upgrade build to dune (@talex5)

  • upgrade to opam2 format (@talex5)

v0.5 (2017-12-20)

  • prometheus-app: update to cohttp.1.0.0 API (#15, @djs55)

  • add support for histograms (#14, @stijn-devriendt and @talex5)

  • add Sample_set module to clean up the API a bit (#13, @talex5)

  • fix gettimeofday parameter not used in favor of Unix.gettimeofdaya (#12, @stijn-devriendt)

v0.4 (2017-08-02)

  • unix: update to cohttp >= 0.99.0. Note this means the unix package requires OCaml 4.03+. The main library still only requires OCaml 4.01+

v0.3 (2017-07-03)

  • Build tweaks to support topkg versioning (@avsm)

v0.2 (2017-05-18)

  • add example program and update README

  • switch to jbuilder

  • throw a clearer error on registering a duplicate metric

  • use Re rather than Str


  • Initial release.