lib/boot/supervisor.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         "bytes"
   9         "context"
  10         "crypto/rand"
  11         "encoding/json"
  12         "errors"
  13         "fmt"
  14         "io"
  15         "io/ioutil"
  16         "net"
  17         "net/url"
  18         "os"
  19         "os/exec"
  20         "os/signal"
  21         "os/user"
  22         "path/filepath"
  23         "reflect"
  24         "strconv"
  25         "strings"
  26         "sync"
  27         "syscall"
  28         "time"
  29
  30         "git.arvados.org/arvados.git/lib/config"
  31         "git.arvados.org/arvados.git/lib/service"
  32         "git.arvados.org/arvados.git/sdk/go/arvados"
  33         "git.arvados.org/arvados.git/sdk/go/ctxlog"
  34         "git.arvados.org/arvados.git/sdk/go/health"
  35         "github.com/fsnotify/fsnotify"
  36         "github.com/sirupsen/logrus"
  37 )
  38
  39 type Supervisor struct {
  40         SourcePath           string // e.g., /home/username/src/arvados
  41         SourceVersion        string // e.g., acbd1324...
  42         ClusterType          string // e.g., production
  43         ListenHost           string // e.g., localhost
  44         ControllerAddr       string // e.g., 127.0.0.1:8000
  45         OwnTemporaryDatabase bool
  46         Stderr               io.Writer
  47
  48         logger  logrus.FieldLogger
  49         cluster *arvados.Cluster
  50
  51         ctx           context.Context
  52         cancel        context.CancelFunc
  53         done          chan struct{} // closed when child procs/services have shut down
  54         err           error         // error that caused shutdown (valid when done is closed)
  55         healthChecker *health.Aggregator
  56         tasksReady    map[string]chan bool
  57         waitShutdown  sync.WaitGroup
  58
  59         bindir     string
  60         tempdir    string
  61         wwwtempdir string
  62         configfile string
  63         environ    []string // for child processes
  64 }
  65
  66 func (super *Supervisor) Cluster() *arvados.Cluster { return super.cluster }
  67
  68 func (super *Supervisor) Start(ctx context.Context, cfg *arvados.Config, cfgPath string) {
  69         super.ctx, super.cancel = context.WithCancel(ctx)
  70         super.done = make(chan struct{})
  71
  72         go func() {
  73                 defer close(super.done)
  74
  75                 sigch := make(chan os.Signal)
  76                 signal.Notify(sigch, syscall.SIGINT, syscall.SIGTERM)
  77                 defer signal.Stop(sigch)
  78                 go func() {
  79                         for sig := range sigch {
  80                                 super.logger.WithField("signal", sig).Info("caught signal")
  81                                 if super.err == nil {
  82                                         super.err = fmt.Errorf("caught signal %s", sig)
  83                                 }
  84                                 super.cancel()
  85                         }
  86                 }()
  87
  88                 hupch := make(chan os.Signal)
  89                 signal.Notify(hupch, syscall.SIGHUP)
  90                 defer signal.Stop(hupch)
  91                 go func() {
  92                         for sig := range hupch {
  93                                 super.logger.WithField("signal", sig).Info("caught signal")
  94                                 if super.err == nil {
  95                                         super.err = errNeedConfigReload
  96                                 }
  97                                 super.cancel()
  98                         }
  99                 }()
 100
 101                 if cfgPath != "" && cfgPath != "-" && cfg.AutoReloadConfig {
 102                         go watchConfig(super.ctx, super.logger, cfgPath, copyConfig(cfg), func() {
 103                                 if super.err == nil {
 104                                         super.err = errNeedConfigReload
 105                                 }
 106                                 super.cancel()
 107                         })
 108                 }
 109
 110                 err := super.run(cfg)
 111                 if err != nil {
 112                         super.logger.WithError(err).Warn("supervisor shut down")
 113                         if super.err == nil {
 114                                 super.err = err
 115                         }
 116                 }
 117         }()
 118 }
 119
 120 func (super *Supervisor) Wait() error {
 121         <-super.done
 122         return super.err
 123 }
 124
 125 func (super *Supervisor) run(cfg *arvados.Config) error {
 126         defer super.cancel()
 127
 128         cwd, err := os.Getwd()
 129         if err != nil {
 130                 return err
 131         }
 132         if !strings.HasPrefix(super.SourcePath, "/") {
 133                 super.SourcePath = filepath.Join(cwd, super.SourcePath)
 134         }
 135         super.SourcePath, err = filepath.EvalSymlinks(super.SourcePath)
 136         if err != nil {
 137                 return err
 138         }
 139
 140         // Choose bin and temp dirs: /var/lib/arvados/... in
 141         // production, transient tempdir otherwise.
 142         if super.ClusterType == "production" {
 143                 // These dirs have already been created by
 144                 // "arvados-server install" (or by extracting a
 145                 // package).
 146                 super.tempdir = "/var/lib/arvados/tmp"
 147                 super.wwwtempdir = "/var/lib/arvados/wwwtmp"
 148                 super.bindir = "/var/lib/arvados/bin"
 149         } else {
 150                 super.tempdir, err = ioutil.TempDir("", "arvados-server-boot-")
 151                 if err != nil {
 152                         return err
 153                 }
 154                 defer os.RemoveAll(super.tempdir)
 155                 super.wwwtempdir = super.tempdir
 156                 super.bindir = filepath.Join(super.tempdir, "bin")
 157                 if err := os.Mkdir(super.bindir, 0755); err != nil {
 158                         return err
 159                 }
 160         }
 161
 162         // Fill in any missing config keys, and write the resulting
 163         // config in the temp dir for child services to use.
 164         err = super.autofillConfig(cfg)
 165         if err != nil {
 166                 return err
 167         }
 168         conffile, err := os.OpenFile(filepath.Join(super.wwwtempdir, "config.yml"), os.O_CREATE|os.O_WRONLY, 0644)
 169         if err != nil {
 170                 return err
 171         }
 172         defer conffile.Close()
 173         err = json.NewEncoder(conffile).Encode(cfg)
 174         if err != nil {
 175                 return err
 176         }
 177         err = conffile.Close()
 178         if err != nil {
 179                 return err
 180         }
 181         super.configfile = conffile.Name()
 182
 183         super.environ = os.Environ()
 184         super.cleanEnv([]string{"ARVADOS_"})
 185         super.setEnv("ARVADOS_CONFIG", super.configfile)
 186         super.setEnv("RAILS_ENV", super.ClusterType)
 187         super.setEnv("TMPDIR", super.tempdir)
 188         super.prependEnv("PATH", "/var/lib/arvados/bin:")
 189         if super.ClusterType != "production" {
 190                 super.prependEnv("PATH", super.tempdir+"/bin:")
 191         }
 192
 193         super.cluster, err = cfg.GetCluster("")
 194         if err != nil {
 195                 return err
 196         }
 197         // Now that we have the config, replace the bootstrap logger
 198         // with a new one according to the logging config.
 199         loglevel := super.cluster.SystemLogs.LogLevel
 200         if s := os.Getenv("ARVADOS_DEBUG"); s != "" && s != "0" {
 201                 loglevel = "debug"
 202         }
 203         super.logger = ctxlog.New(super.Stderr, super.cluster.SystemLogs.Format, loglevel).WithFields(logrus.Fields{
 204                 "PID": os.Getpid(),
 205         })
 206
 207         if super.SourceVersion == "" && super.ClusterType == "production" {
 208                 // don't need SourceVersion
 209         } else if super.SourceVersion == "" {
 210                 // Find current source tree version.
 211                 var buf bytes.Buffer
 212                 err = super.RunProgram(super.ctx, ".", runOptions{output: &buf}, "git", "diff", "--shortstat")
 213                 if err != nil {
 214                         return err
 215                 }
 216                 dirty := buf.Len() > 0
 217                 buf.Reset()
 218                 err = super.RunProgram(super.ctx, ".", runOptions{output: &buf}, "git", "log", "-n1", "--format=%H")
 219                 if err != nil {
 220                         return err
 221                 }
 222                 super.SourceVersion = strings.TrimSpace(buf.String())
 223                 if dirty {
 224                         super.SourceVersion += "+uncommitted"
 225                 }
 226         } else {
 227                 return errors.New("specifying a version to run is not yet supported")
 228         }
 229
 230         _, err = super.installGoProgram(super.ctx, "cmd/arvados-server")
 231         if err != nil {
 232                 return err
 233         }
 234         err = super.setupRubyEnv()
 235         if err != nil {
 236                 return err
 237         }
 238
 239         tasks := []supervisedTask{
 240                 createCertificates{},
 241                 runPostgreSQL{},
 242                 runNginx{},
 243                 runServiceCommand{name: "controller", svc: super.cluster.Services.Controller, depends: []supervisedTask{seedDatabase{}}},
 244                 runGoProgram{src: "services/arv-git-httpd", svc: super.cluster.Services.GitHTTP},
 245                 runGoProgram{src: "services/health", svc: super.cluster.Services.Health},
 246                 runGoProgram{src: "services/keepproxy", svc: super.cluster.Services.Keepproxy, depends: []supervisedTask{runPassenger{src: "services/api"}}},
 247                 runGoProgram{src: "services/keepstore", svc: super.cluster.Services.Keepstore},
 248                 runGoProgram{src: "services/keep-web", svc: super.cluster.Services.WebDAV},
 249                 runServiceCommand{name: "ws", svc: super.cluster.Services.Websocket, depends: []supervisedTask{seedDatabase{}}},
 250                 installPassenger{src: "services/api"},
 251                 runPassenger{src: "services/api", varlibdir: "railsapi", svc: super.cluster.Services.RailsAPI, depends: []supervisedTask{createCertificates{}, seedDatabase{}, installPassenger{src: "services/api"}}},
 252                 installPassenger{src: "apps/workbench", depends: []supervisedTask{seedDatabase{}}}, // dependency ensures workbench doesn't delay api install/startup
 253                 runPassenger{src: "apps/workbench", varlibdir: "workbench1", svc: super.cluster.Services.Workbench1, depends: []supervisedTask{installPassenger{src: "apps/workbench"}}},
 254                 seedDatabase{},
 255         }
 256         if super.ClusterType != "test" {
 257                 tasks = append(tasks,
 258                         runServiceCommand{name: "dispatch-cloud", svc: super.cluster.Services.DispatchCloud},
 259                         runGoProgram{src: "services/keep-balance", svc: super.cluster.Services.Keepbalance},
 260                 )
 261         }
 262         super.tasksReady = map[string]chan bool{}
 263         for _, task := range tasks {
 264                 super.tasksReady[task.String()] = make(chan bool)
 265         }
 266         for _, task := range tasks {
 267                 task := task
 268                 fail := func(err error) {
 269                         if super.ctx.Err() != nil {
 270                                 return
 271                         }
 272                         super.cancel()
 273                         super.logger.WithField("task", task.String()).WithError(err).Error("task failed")
 274                 }
 275                 go func() {
 276                         super.logger.WithField("task", task.String()).Info("starting")
 277                         err := task.Run(super.ctx, fail, super)
 278                         if err != nil {
 279                                 fail(err)
 280                                 return
 281                         }
 282                         close(super.tasksReady[task.String()])
 283                 }()
 284         }
 285         err = super.wait(super.ctx, tasks...)
 286         if err != nil {
 287                 return err
 288         }
 289         super.logger.Info("all startup tasks are complete; starting health checks")
 290         super.healthChecker = &health.Aggregator{Cluster: super.cluster}
 291         <-super.ctx.Done()
 292         super.logger.Info("shutting down")
 293         super.waitShutdown.Wait()
 294         return super.ctx.Err()
 295 }
 296
 297 func (super *Supervisor) wait(ctx context.Context, tasks ...supervisedTask) error {
 298         for _, task := range tasks {
 299                 ch, ok := super.tasksReady[task.String()]
 300                 if !ok {
 301                         return fmt.Errorf("no such task: %s", task)
 302                 }
 303                 super.logger.WithField("task", task.String()).Info("waiting")
 304                 select {
 305                 case <-ch:
 306                         super.logger.WithField("task", task.String()).Info("ready")
 307                 case <-ctx.Done():
 308                         super.logger.WithField("task", task.String()).Info("task was never ready")
 309                         return ctx.Err()
 310                 }
 311         }
 312         return nil
 313 }
 314
 315 func (super *Supervisor) Stop() {
 316         super.cancel()
 317         <-super.done
 318 }
 319
 320 func (super *Supervisor) WaitReady() (*arvados.URL, bool) {
 321         ticker := time.NewTicker(time.Second)
 322         defer ticker.Stop()
 323         for waiting := "all"; waiting != ""; {
 324                 select {
 325                 case <-ticker.C:
 326                 case <-super.ctx.Done():
 327                         return nil, false
 328                 }
 329                 if super.healthChecker == nil {
 330                         // not set up yet
 331                         continue
 332                 }
 333                 resp := super.healthChecker.ClusterHealth()
 334                 // The overall health check (resp.Health=="OK") might
 335                 // never pass due to missing components (like
 336                 // arvados-dispatch-cloud in a test cluster), so
 337                 // instead we wait for all configured components to
 338                 // pass.
 339                 waiting = ""
 340                 for target, check := range resp.Checks {
 341                         if check.Health != "OK" {
 342                                 waiting += " " + target
 343                         }
 344                 }
 345                 if waiting != "" {
 346                         super.logger.WithField("targets", waiting[1:]).Info("waiting")
 347                 }
 348         }
 349         u := super.cluster.Services.Controller.ExternalURL
 350         return &u, true
 351 }
 352
 353 func (super *Supervisor) prependEnv(key, prepend string) {
 354         for i, s := range super.environ {
 355                 if strings.HasPrefix(s, key+"=") {
 356                         super.environ[i] = key + "=" + prepend + s[len(key)+1:]
 357                         return
 358                 }
 359         }
 360         super.environ = append(super.environ, key+"="+prepend)
 361 }
 362
 363 func (super *Supervisor) cleanEnv(prefixes []string) {
 364         var cleaned []string
 365         for _, s := range super.environ {
 366                 drop := false
 367                 for _, p := range prefixes {
 368                         if strings.HasPrefix(s, p) {
 369                                 drop = true
 370                                 break
 371                         }
 372                 }
 373                 if !drop {
 374                         cleaned = append(cleaned, s)
 375                 }
 376         }
 377         super.environ = cleaned
 378 }
 379
 380 func (super *Supervisor) setEnv(key, val string) {
 381         for i, s := range super.environ {
 382                 if strings.HasPrefix(s, key+"=") {
 383                         super.environ[i] = key + "=" + val
 384                         return
 385                 }
 386         }
 387         super.environ = append(super.environ, key+"="+val)
 388 }
 389
 390 // Remove all but the first occurrence of each env var.
 391 func dedupEnv(in []string) []string {
 392         saw := map[string]bool{}
 393         var out []string
 394         for _, kv := range in {
 395                 if split := strings.Index(kv, "="); split < 1 {
 396                         panic("invalid environment var: " + kv)
 397                 } else if saw[kv[:split]] {
 398                         continue
 399                 } else {
 400                         saw[kv[:split]] = true
 401                         out = append(out, kv)
 402                 }
 403         }
 404         return out
 405 }
 406
 407 func (super *Supervisor) installGoProgram(ctx context.Context, srcpath string) (string, error) {
 408         _, basename := filepath.Split(srcpath)
 409         binfile := filepath.Join(super.bindir, basename)
 410         if super.ClusterType == "production" {
 411                 return binfile, nil
 412         }
 413         err := super.RunProgram(ctx, filepath.Join(super.SourcePath, srcpath), runOptions{env: []string{"GOBIN=" + super.bindir}}, "go", "install", "-ldflags", "-X git.arvados.org/arvados.git/lib/cmd.version="+super.SourceVersion+" -X main.version="+super.SourceVersion)
 414         return binfile, err
 415 }
 416
 417 func (super *Supervisor) usingRVM() bool {
 418         return os.Getenv("rvm_path") != ""
 419 }
 420
 421 func (super *Supervisor) setupRubyEnv() error {
 422         if !super.usingRVM() {
 423                 // (If rvm is in use, assume the caller has everything
 424                 // set up as desired)
 425                 super.cleanEnv([]string{
 426                         "GEM_HOME=",
 427                         "GEM_PATH=",
 428                 })
 429                 gem := "gem"
 430                 if _, err := os.Stat("/var/lib/arvados/bin/gem"); err == nil || super.ClusterType == "production" {
 431                         gem = "/var/lib/arvados/bin/gem"
 432                 }
 433                 cmd := exec.Command(gem, "env", "gempath")
 434                 if super.ClusterType == "production" {
 435                         cmd.Args = append([]string{"sudo", "-u", "www-data", "-E", "HOME=/var/www"}, cmd.Args...)
 436                         path, err := exec.LookPath("sudo")
 437                         if err != nil {
 438                                 return fmt.Errorf("LookPath(\"sudo\"): %w", err)
 439                         }
 440                         cmd.Path = path
 441                 }
 442                 cmd.Stderr = super.Stderr
 443                 cmd.Env = super.environ
 444                 buf, err := cmd.Output() // /var/lib/arvados/.gem/ruby/2.5.0/bin:...
 445                 if err != nil || len(buf) == 0 {
 446                         return fmt.Errorf("gem env gempath: %w", err)
 447                 }
 448                 gempath := string(bytes.Split(buf, []byte{':'})[0])
 449                 super.prependEnv("PATH", gempath+"/bin:")
 450                 super.setEnv("GEM_HOME", gempath)
 451                 super.setEnv("GEM_PATH", gempath)
 452         }
 453         // Passenger install doesn't work unless $HOME is ~user
 454         u, err := user.Current()
 455         if err != nil {
 456                 return err
 457         }
 458         super.setEnv("HOME", u.HomeDir)
 459         return nil
 460 }
 461
 462 func (super *Supervisor) lookPath(prog string) string {
 463         for _, val := range super.environ {
 464                 if strings.HasPrefix(val, "PATH=") {
 465                         for _, dir := range filepath.SplitList(val[5:]) {
 466                                 path := filepath.Join(dir, prog)
 467                                 if fi, err := os.Stat(path); err == nil && fi.Mode()&0111 != 0 {
 468                                         return path
 469                                 }
 470                         }
 471                 }
 472         }
 473         return prog
 474 }
 475
 476 type runOptions struct {
 477         output io.Writer // attach stdout
 478         env    []string  // add/replace environment variables
 479         user   string    // run as specified user
 480 }
 481
 482 // RunProgram runs prog with args, using dir as working directory. If ctx is
 483 // cancelled while the child is running, RunProgram terminates the child, waits
 484 // for it to exit, then returns.
 485 //
 486 // Child's environment will have our env vars, plus any given in env.
 487 //
 488 // Child's stdout will be written to output if non-nil, otherwise the
 489 // boot command's stderr.
 490 func (super *Supervisor) RunProgram(ctx context.Context, dir string, opts runOptions, prog string, args ...string) error {
 491         cmdline := fmt.Sprintf("%s", append([]string{prog}, args...))
 492         super.logger.WithField("command", cmdline).WithField("dir", dir).Info("executing")
 493
 494         logprefix := prog
 495         {
 496                 innerargs := args
 497                 if logprefix == "sudo" {
 498                         for i := 0; i < len(args); i++ {
 499                                 if args[i] == "-u" {
 500                                         i++
 501                                 } else if args[i] == "-E" || strings.Contains(args[i], "=") {
 502                                 } else {
 503                                         logprefix = args[i]
 504                                         innerargs = args[i+1:]
 505                                         break
 506                                 }
 507                         }
 508                 }
 509                 logprefix = strings.TrimPrefix(logprefix, "/var/lib/arvados/bin/")
 510                 logprefix = strings.TrimPrefix(logprefix, super.tempdir+"/bin/")
 511                 if logprefix == "bundle" && len(innerargs) > 2 && innerargs[0] == "exec" {
 512                         _, dirbase := filepath.Split(dir)
 513                         logprefix = innerargs[1] + "@" + dirbase
 514                 } else if logprefix == "arvados-server" && len(args) > 1 {
 515                         logprefix = args[0]
 516                 }
 517                 if !strings.HasPrefix(dir, "/") {
 518                         logprefix = dir + ": " + logprefix
 519                 }
 520         }
 521
 522         cmd := exec.Command(super.lookPath(prog), args...)
 523         stdout, err := cmd.StdoutPipe()
 524         if err != nil {
 525                 return err
 526         }
 527         stderr, err := cmd.StderrPipe()
 528         if err != nil {
 529                 return err
 530         }
 531         logwriter := &service.LogPrefixer{Writer: super.Stderr, Prefix: []byte("[" + logprefix + "] ")}
 532         var copiers sync.WaitGroup
 533         copiers.Add(1)
 534         go func() {
 535                 io.Copy(logwriter, stderr)
 536                 copiers.Done()
 537         }()
 538         copiers.Add(1)
 539         go func() {
 540                 if opts.output == nil {
 541                         io.Copy(logwriter, stdout)
 542                 } else {
 543                         io.Copy(opts.output, stdout)
 544                 }
 545                 copiers.Done()
 546         }()
 547
 548         if strings.HasPrefix(dir, "/") {
 549                 cmd.Dir = dir
 550         } else {
 551                 cmd.Dir = filepath.Join(super.SourcePath, dir)
 552         }
 553         env := append([]string(nil), opts.env...)
 554         env = append(env, super.environ...)
 555         cmd.Env = dedupEnv(env)
 556
 557         if opts.user != "" {
 558                 // Note: We use this approach instead of "sudo"
 559                 // because in certain circumstances (we are pid 1 in a
 560                 // docker container, and our passenger child process
 561                 // changes to pgid 1) the intermediate sudo process
 562                 // notices we have the same pgid as our child and
 563                 // refuses to propagate signals from us to our child,
 564                 // so we can't signal/shutdown our passenger/rails
 565                 // apps. "chpst" or "setuidgid" would work, but these
 566                 // few lines avoid depending on runit/daemontools.
 567                 u, err := user.Lookup(opts.user)
 568                 if err != nil {
 569                         return fmt.Errorf("user.Lookup(%q): %w", opts.user, err)
 570                 }
 571                 uid, _ := strconv.Atoi(u.Uid)
 572                 gid, _ := strconv.Atoi(u.Gid)
 573                 cmd.SysProcAttr = &syscall.SysProcAttr{
 574                         Credential: &syscall.Credential{
 575                                 Uid: uint32(uid),
 576                                 Gid: uint32(gid),
 577                         },
 578                 }
 579         }
 580
 581         exited := false
 582         defer func() { exited = true }()
 583         go func() {
 584                 <-ctx.Done()
 585                 log := ctxlog.FromContext(ctx).WithFields(logrus.Fields{"dir": dir, "cmdline": cmdline})
 586                 for !exited {
 587                         if cmd.Process == nil {
 588                                 log.Debug("waiting for child process to start")
 589                                 time.Sleep(time.Second / 2)
 590                         } else {
 591                                 log.WithField("PID", cmd.Process.Pid).Debug("sending SIGTERM")
 592                                 cmd.Process.Signal(syscall.SIGTERM)
 593                                 time.Sleep(5 * time.Second)
 594                                 if !exited {
 595                                         stdout.Close()
 596                                         stderr.Close()
 597                                         log.WithField("PID", cmd.Process.Pid).Warn("still waiting for child process to exit 5s after SIGTERM")
 598                                 }
 599                         }
 600                 }
 601         }()
 602
 603         err = cmd.Start()
 604         if err != nil {
 605                 return err
 606         }
 607         copiers.Wait()
 608         err = cmd.Wait()
 609         if ctx.Err() != nil {
 610                 // Return "context canceled", instead of the "killed"
 611                 // error that was probably caused by the context being
 612                 // canceled.
 613                 return ctx.Err()
 614         } else if err != nil {
 615                 return fmt.Errorf("%s: error: %v", cmdline, err)
 616         }
 617         return nil
 618 }
 619
 620 func (super *Supervisor) autofillConfig(cfg *arvados.Config) error {
 621         cluster, err := cfg.GetCluster("")
 622         if err != nil {
 623                 return err
 624         }
 625         usedPort := map[string]bool{}
 626         nextPort := func(host string) string {
 627                 for {
 628                         port, err := availablePort(host)
 629                         if err != nil {
 630                                 panic(err)
 631                         }
 632                         if usedPort[port] {
 633                                 continue
 634                         }
 635                         usedPort[port] = true
 636                         return port
 637                 }
 638         }
 639         if cluster.Services.Controller.ExternalURL.Host == "" {
 640                 h, p, err := net.SplitHostPort(super.ControllerAddr)
 641                 if err != nil {
 642                         return err
 643                 }
 644                 if h == "" {
 645                         h = super.ListenHost
 646                 }
 647                 if p == "0" {
 648                         p = nextPort(h)
 649                 }
 650                 cluster.Services.Controller.ExternalURL = arvados.URL{Scheme: "https", Host: net.JoinHostPort(h, p), Path: "/"}
 651         }
 652         for _, svc := range []*arvados.Service{
 653                 &cluster.Services.Controller,
 654                 &cluster.Services.DispatchCloud,
 655                 &cluster.Services.GitHTTP,
 656                 &cluster.Services.Health,
 657                 &cluster.Services.Keepproxy,
 658                 &cluster.Services.Keepstore,
 659                 &cluster.Services.RailsAPI,
 660                 &cluster.Services.WebDAV,
 661                 &cluster.Services.WebDAVDownload,
 662                 &cluster.Services.Websocket,
 663                 &cluster.Services.Workbench1,
 664         } {
 665                 if svc == &cluster.Services.DispatchCloud && super.ClusterType == "test" {
 666                         continue
 667                 }
 668                 if svc.ExternalURL.Host == "" {
 669                         if svc == &cluster.Services.Controller ||
 670                                 svc == &cluster.Services.GitHTTP ||
 671                                 svc == &cluster.Services.Health ||
 672                                 svc == &cluster.Services.Keepproxy ||
 673                                 svc == &cluster.Services.WebDAV ||
 674                                 svc == &cluster.Services.WebDAVDownload ||
 675                                 svc == &cluster.Services.Workbench1 {
 676                                 svc.ExternalURL = arvados.URL{Scheme: "https", Host: fmt.Sprintf("%s:%s", super.ListenHost, nextPort(super.ListenHost)), Path: "/"}
 677                         } else if svc == &cluster.Services.Websocket {
 678                                 svc.ExternalURL = arvados.URL{Scheme: "wss", Host: fmt.Sprintf("%s:%s", super.ListenHost, nextPort(super.ListenHost)), Path: "/websocket"}
 679                         }
 680                 }
 681                 if len(svc.InternalURLs) == 0 {
 682                         svc.InternalURLs = map[arvados.URL]arvados.ServiceInstance{
 683                                 {Scheme: "http", Host: fmt.Sprintf("%s:%s", super.ListenHost, nextPort(super.ListenHost)), Path: "/"}: {},
 684                         }
 685                 }
 686         }
 687         if super.ClusterType != "production" {
 688                 if cluster.SystemRootToken == "" {
 689                         cluster.SystemRootToken = randomHexString(64)
 690                 }
 691                 if cluster.ManagementToken == "" {
 692                         cluster.ManagementToken = randomHexString(64)
 693                 }
 694                 if cluster.Collections.BlobSigningKey == "" {
 695                         cluster.Collections.BlobSigningKey = randomHexString(64)
 696                 }
 697                 if cluster.Users.AnonymousUserToken == "" {
 698                         cluster.Users.AnonymousUserToken = randomHexString(64)
 699                 }
 700                 if cluster.Containers.DispatchPrivateKey == "" {
 701                         buf, err := ioutil.ReadFile(filepath.Join(super.SourcePath, "lib", "dispatchcloud", "test", "sshkey_dispatch"))
 702                         if err != nil {
 703                                 return err
 704                         }
 705                         cluster.Containers.DispatchPrivateKey = string(buf)
 706                 }
 707                 cluster.TLS.Insecure = true
 708         }
 709         if super.ClusterType == "test" {
 710                 // Add a second keepstore process.
 711                 cluster.Services.Keepstore.InternalURLs[arvados.URL{Scheme: "http", Host: fmt.Sprintf("%s:%s", super.ListenHost, nextPort(super.ListenHost)), Path: "/"}] = arvados.ServiceInstance{}
 712
 713                 // Create a directory-backed volume for each keepstore
 714                 // process.
 715                 cluster.Volumes = map[string]arvados.Volume{}
 716                 for url := range cluster.Services.Keepstore.InternalURLs {
 717                         volnum := len(cluster.Volumes)
 718                         datadir := fmt.Sprintf("%s/keep%d.data", super.tempdir, volnum)
 719                         if _, err = os.Stat(datadir + "/."); err == nil {
 720                         } else if !os.IsNotExist(err) {
 721                                 return err
 722                         } else if err = os.Mkdir(datadir, 0755); err != nil {
 723                                 return err
 724                         }
 725                         cluster.Volumes[fmt.Sprintf(cluster.ClusterID+"-nyw5e-%015d", volnum)] = arvados.Volume{
 726                                 Driver:           "Directory",
 727                                 DriverParameters: json.RawMessage(fmt.Sprintf(`{"Root":%q}`, datadir)),
 728                                 AccessViaHosts: map[arvados.URL]arvados.VolumeAccess{
 729                                         url: {},
 730                                 },
 731                         }
 732                 }
 733         }
 734         if super.OwnTemporaryDatabase {
 735                 cluster.PostgreSQL.Connection = arvados.PostgreSQLConnection{
 736                         "client_encoding": "utf8",
 737                         "host":            super.ListenHost,
 738                         "port":            nextPort(super.ListenHost),
 739                         "dbname":          "arvados_test",
 740                         "user":            "arvados",
 741                         "password":        "insecure_arvados_test",
 742                 }
 743         }
 744
 745         cfg.Clusters[cluster.ClusterID] = *cluster
 746         return nil
 747 }
 748
 749 func addrIsLocal(addr string) (bool, error) {
 750         return true, nil
 751         listener, err := net.Listen("tcp", addr)
 752         if err == nil {
 753                 listener.Close()
 754                 return true, nil
 755         } else if strings.Contains(err.Error(), "cannot assign requested address") {
 756                 return false, nil
 757         } else {
 758                 return false, err
 759         }
 760 }
 761
 762 func randomHexString(chars int) string {
 763         b := make([]byte, chars/2)
 764         _, err := rand.Read(b)
 765         if err != nil {
 766                 panic(err)
 767         }
 768         return fmt.Sprintf("%x", b)
 769 }
 770
 771 func internalPort(svc arvados.Service) (host, port string, err error) {
 772         if len(svc.InternalURLs) > 1 {
 773                 return "", "", errors.New("internalPort() doesn't work with multiple InternalURLs")
 774         }
 775         for u := range svc.InternalURLs {
 776                 u := url.URL(u)
 777                 host, port = u.Hostname(), u.Port()
 778                 switch {
 779                 case port != "":
 780                 case u.Scheme == "https", u.Scheme == "ws":
 781                         port = "443"
 782                 default:
 783                         port = "80"
 784                 }
 785                 return
 786         }
 787         return "", "", fmt.Errorf("service has no InternalURLs")
 788 }
 789
 790 func externalPort(svc arvados.Service) (string, error) {
 791         u := url.URL(svc.ExternalURL)
 792         if p := u.Port(); p != "" {
 793                 return p, nil
 794         } else if u.Scheme == "https" || u.Scheme == "wss" {
 795                 return "443", nil
 796         } else {
 797                 return "80", nil
 798         }
 799 }
 800
 801 func availablePort(host string) (string, error) {
 802         ln, err := net.Listen("tcp", net.JoinHostPort(host, "0"))
 803         if err != nil {
 804                 return "", err
 805         }
 806         defer ln.Close()
 807         _, port, err := net.SplitHostPort(ln.Addr().String())
 808         if err != nil {
 809                 return "", err
 810         }
 811         return port, nil
 812 }
 813
 814 // Try to connect to addr until it works, then close ch. Give up if
 815 // ctx cancels.
 816 func waitForConnect(ctx context.Context, addr string) error {
 817         dialer := net.Dialer{Timeout: time.Second}
 818         for ctx.Err() == nil {
 819                 conn, err := dialer.DialContext(ctx, "tcp", addr)
 820                 if err != nil {
 821                         time.Sleep(time.Second / 10)
 822                         continue
 823                 }
 824                 conn.Close()
 825                 return nil
 826         }
 827         return ctx.Err()
 828 }
 829
 830 func copyConfig(cfg *arvados.Config) *arvados.Config {
 831         pr, pw := io.Pipe()
 832         go func() {
 833                 err := json.NewEncoder(pw).Encode(cfg)
 834                 if err != nil {
 835                         panic(err)
 836                 }
 837                 pw.Close()
 838         }()
 839         cfg2 := new(arvados.Config)
 840         err := json.NewDecoder(pr).Decode(cfg2)
 841         if err != nil {
 842                 panic(err)
 843         }
 844         return cfg2
 845 }
 846
 847 func watchConfig(ctx context.Context, logger logrus.FieldLogger, cfgPath string, prevcfg *arvados.Config, fn func()) {
 848         watcher, err := fsnotify.NewWatcher()
 849         if err != nil {
 850                 logger.WithError(err).Error("fsnotify setup failed")
 851                 return
 852         }
 853         defer watcher.Close()
 854
 855         err = watcher.Add(cfgPath)
 856         if err != nil {
 857                 logger.WithError(err).Error("fsnotify watcher failed")
 858                 return
 859         }
 860
 861         for {
 862                 select {
 863                 case <-ctx.Done():
 864                         return
 865                 case err, ok := <-watcher.Errors:
 866                         if !ok {
 867                                 return
 868                         }
 869                         logger.WithError(err).Warn("fsnotify watcher reported error")
 870                 case _, ok := <-watcher.Events:
 871                         if !ok {
 872                                 return
 873                         }
 874                         for len(watcher.Events) > 0 {
 875                                 <-watcher.Events
 876                         }
 877                         loader := config.NewLoader(&bytes.Buffer{}, &logrus.Logger{Out: ioutil.Discard})
 878                         loader.Path = cfgPath
 879                         loader.SkipAPICalls = true
 880                         cfg, err := loader.Load()
 881                         if err != nil {
 882                                 logger.WithError(err).Warn("error reloading config file after change detected; ignoring new config for now")
 883                         } else if reflect.DeepEqual(cfg, prevcfg) {
 884                                 logger.Debug("config file changed but is still DeepEqual to the existing config")
 885                         } else {
 886                                 logger.Debug("config changed, notifying supervisor")
 887                                 fn()
 888                                 prevcfg = cfg
 889                         }
 890                 }
 891         }
 892 }