services/ws/server.go

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: AGPL-3.0
   4
   5 package main
   6
   7 import (
   8         "net"
   9         "net/http"
  10         "sync"
  11         "time"
  12
  13         "git.arvados.org/arvados.git/sdk/go/arvados"
  14         "github.com/coreos/go-systemd/daemon"
  15 )
  16
  17 type server struct {
  18         httpServer  *http.Server
  19         listener    net.Listener
  20         cluster     *arvados.Cluster
  21         eventSource *pgEventSource
  22         setupOnce   sync.Once
  23 }
  24
  25 func (srv *server) Close() {
  26         srv.WaitReady()
  27         srv.eventSource.Close()
  28         srv.listener.Close()
  29 }
  30
  31 func (srv *server) WaitReady() {
  32         srv.setupOnce.Do(srv.setup)
  33         srv.eventSource.WaitReady()
  34 }
  35
  36 func (srv *server) Run() error {
  37         srv.setupOnce.Do(srv.setup)
  38         return srv.httpServer.Serve(srv.listener)
  39 }
  40
  41 func (srv *server) setup() {
  42         log := logger(nil)
  43
  44         var listen arvados.URL
  45         for listen, _ = range srv.cluster.Services.Websocket.InternalURLs {
  46                 break
  47         }
  48         ln, err := net.Listen("tcp", listen.Host)
  49         if err != nil {
  50                 log.WithField("Listen", listen).Fatal(err)
  51         }
  52         log.WithField("Listen", ln.Addr().String()).Info("listening")
  53
  54         client := arvados.Client{}
  55         client.APIHost = srv.cluster.Services.Controller.ExternalURL.Host
  56         client.AuthToken = srv.cluster.SystemRootToken
  57         client.Insecure = srv.cluster.TLS.Insecure
  58
  59         srv.listener = ln
  60         srv.eventSource = &pgEventSource{
  61                 DataSource:   srv.cluster.PostgreSQL.Connection.String(),
  62                 MaxOpenConns: srv.cluster.PostgreSQL.ConnectionPool,
  63                 QueueSize:    srv.cluster.API.WebsocketServerEventQueue,
  64         }
  65
  66         srv.httpServer = &http.Server{
  67                 Addr:           listen.Host,
  68                 ReadTimeout:    time.Minute,
  69                 WriteTimeout:   time.Minute,
  70                 MaxHeaderBytes: 1 << 20,
  71                 Handler: &router{
  72                         cluster:        srv.cluster,
  73                         client:         client,
  74                         eventSource:    srv.eventSource,
  75                         newPermChecker: func() permChecker { return newPermChecker(client) },
  76                 },
  77         }
  78
  79         go func() {
  80                 srv.eventSource.Run()
  81                 log.Info("event source stopped")
  82                 srv.Close()
  83         }()
  84
  85         if _, err := daemon.SdNotify(false, "READY=1"); err != nil {
  86                 log.WithError(err).Warn("error notifying init daemon")
  87         }
  88 }