lib/boot/nginx.go

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: AGPL-3.0
   4
   5 package boot
   6
   7 import (
   8         "context"
   9         "fmt"
  10         "io/ioutil"
  11         "net"
  12         "net/url"
  13         "os"
  14         "os/exec"
  15         "path/filepath"
  16         "regexp"
  17         "strings"
  18
  19         "git.arvados.org/arvados.git/sdk/go/arvados"
  20 )
  21
  22 // Run an Nginx process that proxies the supervisor's configured
  23 // ExternalURLs to the appropriate InternalURLs.
  24 type runNginx struct{}
  25
  26 func (runNginx) String() string {
  27         return "nginx"
  28 }
  29
  30 func (runNginx) Run(ctx context.Context, fail func(error), super *Supervisor) error {
  31         err := super.wait(ctx, createCertificates{})
  32         if err != nil {
  33                 return err
  34         }
  35         vars := map[string]string{
  36                 "LISTENHOST":       "0.0.0.0",
  37                 "UPSTREAMHOST":     super.ListenHost,
  38                 "SSLCERT":          filepath.Join(super.tempdir, "server.crt"),
  39                 "SSLKEY":           filepath.Join(super.tempdir, "server.key"),
  40                 "ACCESSLOG":        filepath.Join(super.tempdir, "nginx_access.log"),
  41                 "ERRORLOG":         filepath.Join(super.tempdir, "nginx_error.log"),
  42                 "TMPDIR":           super.wwwtempdir,
  43                 "ARVADOS_API_HOST": super.cluster.Services.Controller.ExternalURL.Host,
  44         }
  45         u := url.URL(super.cluster.Services.Controller.ExternalURL)
  46         ctrlHost := u.Hostname()
  47         if strings.HasPrefix(super.cluster.TLS.Certificate, "file:/") && strings.HasPrefix(super.cluster.TLS.Key, "file:/") {
  48                 vars["SSLCERT"] = filepath.Clean(super.cluster.TLS.Certificate[5:])
  49                 vars["SSLKEY"] = filepath.Clean(super.cluster.TLS.Key[5:])
  50         } else if f, err := os.Open("/var/lib/acme/live/" + ctrlHost + "/privkey"); err == nil {
  51                 f.Close()
  52                 vars["SSLCERT"] = "/var/lib/acme/live/" + ctrlHost + "/cert"
  53                 vars["SSLKEY"] = "/var/lib/acme/live/" + ctrlHost + "/privkey"
  54         }
  55         for _, cmpt := range []struct {
  56                 varname string
  57                 svc     arvados.Service
  58         }{
  59                 {"CONTROLLER", super.cluster.Services.Controller},
  60                 {"KEEPWEB", super.cluster.Services.WebDAV},
  61                 {"KEEPWEBDL", super.cluster.Services.WebDAVDownload},
  62                 {"KEEPPROXY", super.cluster.Services.Keepproxy},
  63                 {"GIT", super.cluster.Services.GitHTTP},
  64                 {"HEALTH", super.cluster.Services.Health},
  65                 {"WORKBENCH1", super.cluster.Services.Workbench1},
  66                 {"WORKBENCH2", super.cluster.Services.Workbench2},
  67                 {"WS", super.cluster.Services.Websocket},
  68         } {
  69                 var host, port string
  70                 if len(cmpt.svc.InternalURLs) == 0 {
  71                         // We won't run this service, but we need an
  72                         // upstream port to write in our templated
  73                         // nginx config. Choose a port that will
  74                         // return 502 Bad Gateway.
  75                         port = "9"
  76                 } else if host, port, err = internalPort(cmpt.svc); err != nil {
  77                         return fmt.Errorf("%s internal port: %w (%v)", cmpt.varname, err, cmpt.svc)
  78                 } else if ok, err := addrIsLocal(net.JoinHostPort(host, port)); !ok || err != nil {
  79                         return fmt.Errorf("%s addrIsLocal() failed for host %q port %q: %v", cmpt.varname, host, port, err)
  80                 }
  81                 vars[cmpt.varname+"PORT"] = port
  82
  83                 port, err = externalPort(cmpt.svc)
  84                 if err != nil {
  85                         return fmt.Errorf("%s external port: %w (%v)", cmpt.varname, err, cmpt.svc)
  86                 }
  87                 listenAddr := net.JoinHostPort(super.ListenHost, port)
  88                 if ok, err := addrIsLocal(listenAddr); !ok || err != nil {
  89                         return fmt.Errorf("%s addrIsLocal(%q) failed: %w", cmpt.varname, listenAddr, err)
  90                 }
  91                 vars[cmpt.varname+"SSLPORT"] = port
  92         }
  93         var conftemplate string
  94         if super.ClusterType == "production" {
  95                 conftemplate = "/var/lib/arvados/share/nginx.conf"
  96         } else {
  97                 conftemplate = filepath.Join(super.SourcePath, "sdk", "python", "tests", "nginx.conf")
  98         }
  99         tmpl, err := ioutil.ReadFile(conftemplate)
 100         if err != nil {
 101                 return err
 102         }
 103         conf := regexp.MustCompile(`{{.*?}}`).ReplaceAllStringFunc(string(tmpl), func(src string) string {
 104                 if len(src) < 4 {
 105                         return src
 106                 }
 107                 return vars[src[2:len(src)-2]]
 108         })
 109         conffile := filepath.Join(super.tempdir, "nginx.conf")
 110         err = ioutil.WriteFile(conffile, []byte(conf), 0755)
 111         if err != nil {
 112                 return err
 113         }
 114         nginx := "nginx"
 115         if _, err := exec.LookPath(nginx); err != nil {
 116                 for _, dir := range []string{"/sbin", "/usr/sbin", "/usr/local/sbin"} {
 117                         if _, err = os.Stat(dir + "/nginx"); err == nil {
 118                                 nginx = dir + "/nginx"
 119                                 break
 120                         }
 121                 }
 122         }
 123
 124         configs := "error_log stderr info; "
 125         configs += "pid " + filepath.Join(super.wwwtempdir, "nginx.pid") + "; "
 126         configs += "user www-data; "
 127
 128         super.waitShutdown.Add(1)
 129         go func() {
 130                 defer super.waitShutdown.Done()
 131                 fail(super.RunProgram(ctx, ".", runOptions{}, nginx, "-g", configs, "-c", conffile))
 132         }()
 133         // Choose one of the ports where Nginx should listen, and wait
 134         // here until we can connect. If ExternalURL is https://foo
 135         // (with no port) then we connect to "foo:https"
 136         testurl := url.URL(super.cluster.Services.Controller.ExternalURL)
 137         if testurl.Port() == "" {
 138                 testurl.Host = net.JoinHostPort(testurl.Host, testurl.Scheme)
 139         }
 140         return waitForConnect(ctx, testurl.Host)
 141 }