(*****************************************************************************)
(* *)
(* Open Source License *)
(* Copyright (c) 2023 Nomadic Labs, <contact@nomadic-labs.com> *)
(* *)
(* Permission is hereby granted, free of charge, to any person obtaining a *)
(* copy of this software and associated documentation files (the "Software"),*)
(* to deal in the Software without restriction, including without limitation *)
(* the rights to use, copy, modify, merge, publish, distribute, sublicense, *)
(* and/or sell copies of the Software, and to permit persons to whom the *)
(* Software is furnished to do so, subject to the following conditions: *)
(* *)
(* The above copyright notice and this permission notice shall be included *)
(* in all copies or substantial portions of the Software. *)
(* *)
(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *)
(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *)
(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *)
(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *)
(* DEALINGS IN THE SOFTWARE. *)
(* *)
(*****************************************************************************)
type t = {shutdown : unit Lwt.u; server : unit Lwt.t}
module Metrics_server = Prometheus_app.Cohttp (Cohttp_lwt_unix.Server)
let shutdown t =
Lwt.wakeup t.shutdown () ;
t.server
let shutdown_on_exit t =
Lwt_exit.register_clean_up_callback ~loc:__LOC__ (fun _exit_status ->
shutdown t)
let launch (addr, port) =
let open Lwt_syntax in
let host = Ipaddr.V6.to_string addr in
let* () = Event.(emit starting_metrics_server) (host, port) in
let* ctx = Conduit_lwt_unix.init ~src:host () in
let ctx = Cohttp_lwt_unix.Net.init ~ctx () in
let mode = `TCP (`Port port) in
let callback = Metrics_server.callback in
let stop, shutdown = Lwt.task () in
let server =
Cohttp_lwt_unix.Server.create
~stop
~ctx
~mode
(Cohttp_lwt_unix.Server.make ~callback ())
in
let t = {shutdown; server} in
let (_ : Lwt_exit.clean_up_callback_id) = shutdown_on_exit t in
Lwt.return t