services/crunch-run/crunchrun.go

   1 package main
   2
   3 import (
   4         "encoding/json"
   5         "errors"
   6         "flag"
   7         "fmt"
   8         "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
   9         "git.curoverse.com/arvados.git/sdk/go/keepclient"
  10         "git.curoverse.com/arvados.git/sdk/go/manifest"
  11         "github.com/curoverse/dockerclient"
  12         "io"
  13         "io/ioutil"
  14         "log"
  15         "os"
  16         "os/exec"
  17         "os/signal"
  18         "strings"
  19         "sync"
  20         "syscall"
  21         "time"
  22 )
  23
  24 // IArvadosClient is the minimal Arvados API methods used by crunch-run.
  25 type IArvadosClient interface {
  26         Create(resourceType string, parameters arvadosclient.Dict, output interface{}) error
  27         Get(resourceType string, uuid string, parameters arvadosclient.Dict, output interface{}) error
  28         Update(resourceType string, uuid string, parameters arvadosclient.Dict, output interface{}) (err error)
  29 }
  30
  31 // ErrCancelled is the error returned when the container is cancelled.
  32 var ErrCancelled = errors.New("Cancelled")
  33
  34 // IKeepClient is the minimal Keep API methods used by crunch-run.
  35 type IKeepClient interface {
  36         PutHB(hash string, buf []byte) (string, int, error)
  37         ManifestFileReader(m manifest.Manifest, filename string) (keepclient.ReadCloserWithLen, error)
  38 }
  39
  40 // Mount describes the mount points to create inside the container.
  41 type Mount struct {
  42         Kind             string `json:"kind"`
  43         Writable         bool   `json:"writable"`
  44         PortableDataHash string `json:"portable_data_hash"`
  45         UUID             string `json:"uuid"`
  46         DeviceType       string `json:"device_type"`
  47 }
  48
  49 // Collection record returned by the API server.
  50 type CollectionRecord struct {
  51         ManifestText     string `json:"manifest_text"`
  52         PortableDataHash string `json:"portable_data_hash"`
  53 }
  54
  55 // ContainerRecord is the container record returned by the API server.
  56 type ContainerRecord struct {
  57         UUID               string                 `json:"uuid"`
  58         Command            []string               `json:"command"`
  59         ContainerImage     string                 `json:"container_image"`
  60         Cwd                string                 `json:"cwd"`
  61         Environment        map[string]string      `json:"environment"`
  62         Mounts             map[string]Mount       `json:"mounts"`
  63         OutputPath         string                 `json:"output_path"`
  64         Priority           int                    `json:"priority"`
  65         RuntimeConstraints map[string]interface{} `json:"runtime_constraints"`
  66         State              string                 `json:"state"`
  67         Output             string                 `json:"output"`
  68 }
  69
  70 // NewLogWriter is a factory function to create a new log writer.
  71 type NewLogWriter func(name string) io.WriteCloser
  72
  73 type RunArvMount func([]string) (*exec.Cmd, error)
  74
  75 type MkTempDir func(string, string) (string, error)
  76
  77 // ThinDockerClient is the minimal Docker client interface used by crunch-run.
  78 type ThinDockerClient interface {
  79         StopContainer(id string, timeout int) error
  80         InspectImage(id string) (*dockerclient.ImageInfo, error)
  81         LoadImage(reader io.Reader) error
  82         CreateContainer(config *dockerclient.ContainerConfig, name string, authConfig *dockerclient.AuthConfig) (string, error)
  83         StartContainer(id string, config *dockerclient.HostConfig) error
  84         AttachContainer(id string, options *dockerclient.AttachOptions) (io.ReadCloser, error)
  85         Wait(id string) <-chan dockerclient.WaitResult
  86         RemoveImage(name string, force bool) ([]*dockerclient.ImageDelete, error)
  87 }
  88
  89 // ContainerRunner is the main stateful struct used for a single execution of a
  90 // container.
  91 type ContainerRunner struct {
  92         Docker    ThinDockerClient
  93         ArvClient IArvadosClient
  94         Kc        IKeepClient
  95         ContainerRecord
  96         dockerclient.ContainerConfig
  97         ContainerID string
  98         ExitCode    *int
  99         NewLogWriter
 100         loggingDone   chan bool
 101         CrunchLog     *ThrottledLogger
 102         Stdout        *ThrottledLogger
 103         Stderr        *ThrottledLogger
 104         LogCollection *CollectionWriter
 105         LogsPDH       *string
 106         RunArvMount
 107         MkTempDir
 108         ArvMount       *exec.Cmd
 109         ArvMountPoint  string
 110         HostOutputDir  string
 111         CleanupTempDir []string
 112         Binds          []string
 113         OutputPDH      *string
 114         CancelLock     sync.Mutex
 115         Cancelled      bool
 116         SigChan        chan os.Signal
 117         ArvMountExit   chan error
 118         finalState     string
 119 }
 120
 121 // SetupSignals sets up signal handling to gracefully terminate the underlying
 122 // Docker container and update state when receiving a TERM, INT or QUIT signal.
 123 func (runner *ContainerRunner) SetupSignals() {
 124         runner.SigChan = make(chan os.Signal, 1)
 125         signal.Notify(runner.SigChan, syscall.SIGTERM)
 126         signal.Notify(runner.SigChan, syscall.SIGINT)
 127         signal.Notify(runner.SigChan, syscall.SIGQUIT)
 128
 129         go func(sig <-chan os.Signal) {
 130                 for _ = range sig {
 131                         if !runner.Cancelled {
 132                                 runner.CancelLock.Lock()
 133                                 runner.Cancelled = true
 134                                 if runner.ContainerID != "" {
 135                                         runner.Docker.StopContainer(runner.ContainerID, 10)
 136                                 }
 137                                 runner.CancelLock.Unlock()
 138                         }
 139                 }
 140         }(runner.SigChan)
 141 }
 142
 143 // LoadImage determines the docker image id from the container record and
 144 // checks if it is available in the local Docker image store.  If not, it loads
 145 // the image from Keep.
 146 func (runner *ContainerRunner) LoadImage() (err error) {
 147
 148         runner.CrunchLog.Printf("Fetching Docker image from collection '%s'", runner.ContainerRecord.ContainerImage)
 149
 150         var collection CollectionRecord
 151         err = runner.ArvClient.Get("collections", runner.ContainerRecord.ContainerImage, nil, &collection)
 152         if err != nil {
 153                 return fmt.Errorf("While getting container image collection: %v", err)
 154         }
 155         manifest := manifest.Manifest{Text: collection.ManifestText}
 156         var img, imageID string
 157         for ms := range manifest.StreamIter() {
 158                 img = ms.FileStreamSegments[0].Name
 159                 if !strings.HasSuffix(img, ".tar") {
 160                         return fmt.Errorf("First file in the container image collection does not end in .tar")
 161                 }
 162                 imageID = img[:len(img)-4]
 163         }
 164
 165         runner.CrunchLog.Printf("Using Docker image id '%s'", imageID)
 166
 167         _, err = runner.Docker.InspectImage(imageID)
 168         if err != nil {
 169                 runner.CrunchLog.Print("Loading Docker image from keep")
 170
 171                 var readCloser io.ReadCloser
 172                 readCloser, err = runner.Kc.ManifestFileReader(manifest, img)
 173                 if err != nil {
 174                         return fmt.Errorf("While creating ManifestFileReader for container image: %v", err)
 175                 }
 176
 177                 err = runner.Docker.LoadImage(readCloser)
 178                 if err != nil {
 179                         return fmt.Errorf("While loading container image into Docker: %v", err)
 180                 }
 181         } else {
 182                 runner.CrunchLog.Print("Docker image is available")
 183         }
 184
 185         runner.ContainerConfig.Image = imageID
 186
 187         return nil
 188 }
 189
 190 func (runner *ContainerRunner) ArvMountCmd(arvMountCmd []string) (c *exec.Cmd, err error) {
 191         c = exec.Command("arv-mount", arvMountCmd...)
 192         nt := NewThrottledLogger(runner.NewLogWriter("arv-mount"))
 193         c.Stdout = nt
 194         c.Stderr = nt
 195
 196         err = c.Start()
 197         if err != nil {
 198                 return nil, err
 199         }
 200
 201         statReadme := make(chan bool)
 202         runner.ArvMountExit = make(chan error)
 203
 204         keepStatting := true
 205         go func() {
 206                 for keepStatting {
 207                         time.Sleep(100 * time.Millisecond)
 208                         _, err = os.Stat(fmt.Sprintf("%s/by_id/README", runner.ArvMountPoint))
 209                         if err == nil {
 210                                 keepStatting = false
 211                                 statReadme <- true
 212                         }
 213                 }
 214                 close(statReadme)
 215         }()
 216
 217         go func() {
 218                 runner.ArvMountExit <- c.Wait()
 219                 close(runner.ArvMountExit)
 220         }()
 221
 222         select {
 223         case <-statReadme:
 224                 break
 225         case err := <-runner.ArvMountExit:
 226                 runner.ArvMount = nil
 227                 keepStatting = false
 228                 return nil, err
 229         }
 230
 231         return c, nil
 232 }
 233
 234 func (runner *ContainerRunner) SetupMounts() (err error) {
 235         runner.ArvMountPoint, err = runner.MkTempDir("", "keep")
 236         if err != nil {
 237                 return fmt.Errorf("While creating keep mount temp dir: %v", err)
 238         }
 239
 240         runner.CleanupTempDir = append(runner.CleanupTempDir, runner.ArvMountPoint)
 241
 242         pdhOnly := true
 243         tmpcount := 0
 244         arvMountCmd := []string{"--foreground", "--allow-other", "--read-write"}
 245         collectionPaths := []string{}
 246         runner.Binds = nil
 247
 248         for bind, mnt := range runner.ContainerRecord.Mounts {
 249                 if mnt.Kind == "collection" {
 250                         var src string
 251                         if mnt.UUID != "" && mnt.PortableDataHash != "" {
 252                                 return fmt.Errorf("Cannot specify both 'uuid' and 'portable_data_hash' for a collection mount")
 253                         }
 254                         if mnt.UUID != "" {
 255                                 if mnt.Writable {
 256                                         return fmt.Errorf("Writing to existing collections currently not permitted.")
 257                                 }
 258                                 pdhOnly = false
 259                                 src = fmt.Sprintf("%s/by_id/%s", runner.ArvMountPoint, mnt.UUID)
 260                         } else if mnt.PortableDataHash != "" {
 261                                 if mnt.Writable {
 262                                         return fmt.Errorf("Can never write to a collection specified by portable data hash")
 263                                 }
 264                                 src = fmt.Sprintf("%s/by_id/%s", runner.ArvMountPoint, mnt.PortableDataHash)
 265                         } else {
 266                                 src = fmt.Sprintf("%s/tmp%d", runner.ArvMountPoint, tmpcount)
 267                                 arvMountCmd = append(arvMountCmd, "--mount-tmp")
 268                                 arvMountCmd = append(arvMountCmd, fmt.Sprintf("tmp%d", tmpcount))
 269                                 tmpcount += 1
 270                         }
 271                         if mnt.Writable {
 272                                 if bind == runner.ContainerRecord.OutputPath {
 273                                         runner.HostOutputDir = src
 274                                 }
 275                                 runner.Binds = append(runner.Binds, fmt.Sprintf("%s:%s", src, bind))
 276                         } else {
 277                                 runner.Binds = append(runner.Binds, fmt.Sprintf("%s:%s:ro", src, bind))
 278                         }
 279                         collectionPaths = append(collectionPaths, src)
 280                 } else if mnt.Kind == "tmp" {
 281                         if bind == runner.ContainerRecord.OutputPath {
 282                                 runner.HostOutputDir, err = runner.MkTempDir("", "")
 283                                 if err != nil {
 284                                         return fmt.Errorf("While creating mount temp dir: %v", err)
 285                                 }
 286                                 st, staterr := os.Stat(runner.HostOutputDir)
 287                                 if staterr != nil {
 288                                         return fmt.Errorf("While Stat on temp dir: %v", staterr)
 289                                 }
 290                                 err = os.Chmod(runner.HostOutputDir, st.Mode()|os.ModeSetgid|0777)
 291                                 if staterr != nil {
 292                                         return fmt.Errorf("While Chmod temp dir: %v", err)
 293                                 }
 294                                 runner.CleanupTempDir = append(runner.CleanupTempDir, runner.HostOutputDir)
 295                                 runner.Binds = append(runner.Binds, fmt.Sprintf("%s:%s", runner.HostOutputDir, bind))
 296                         } else {
 297                                 runner.Binds = append(runner.Binds, bind)
 298                         }
 299                 } else {
 300                         return fmt.Errorf("Unknown mount kind '%s'", mnt.Kind)
 301                 }
 302         }
 303
 304         if runner.HostOutputDir == "" {
 305                 return fmt.Errorf("Output path does not correspond to a writable mount point")
 306         }
 307
 308         if pdhOnly {
 309                 arvMountCmd = append(arvMountCmd, "--mount-by-pdh", "by_id")
 310         } else {
 311                 arvMountCmd = append(arvMountCmd, "--mount-by-id", "by_id")
 312         }
 313         arvMountCmd = append(arvMountCmd, runner.ArvMountPoint)
 314
 315         runner.ArvMount, err = runner.RunArvMount(arvMountCmd)
 316         if err != nil {
 317                 return fmt.Errorf("While trying to start arv-mount: %v", err)
 318         }
 319
 320         for _, p := range collectionPaths {
 321                 _, err = os.Stat(p)
 322                 if err != nil {
 323                         return fmt.Errorf("While checking that input files exist: %v", err)
 324                 }
 325         }
 326
 327         return nil
 328 }
 329
 330 func (runner *ContainerRunner) ProcessDockerAttach(containerReader io.Reader) {
 331         // Handle docker log protocol
 332         // https://docs.docker.com/engine/reference/api/docker_remote_api_v1.15/#attach-to-a-container
 333
 334         header := make([]byte, 8)
 335         for {
 336                 _, readerr := io.ReadAtLeast(containerReader, header, 8)
 337
 338                 if readerr == nil {
 339                         readsize := int64(header[7]) | (int64(header[6]) << 8) | (int64(header[5]) << 16) | (int64(header[4]) << 24)
 340                         if header[0] == 1 {
 341                                 // stdout
 342                                 _, readerr = io.CopyN(runner.Stdout, containerReader, readsize)
 343                         } else {
 344                                 // stderr
 345                                 _, readerr = io.CopyN(runner.Stderr, containerReader, readsize)
 346                         }
 347                 }
 348
 349                 if readerr != nil {
 350                         if readerr != io.EOF {
 351                                 runner.CrunchLog.Printf("While reading docker logs: %v", readerr)
 352                         }
 353
 354                         closeerr := runner.Stdout.Close()
 355                         if closeerr != nil {
 356                                 runner.CrunchLog.Printf("While closing stdout logs: %v", closeerr)
 357                         }
 358
 359                         closeerr = runner.Stderr.Close()
 360                         if closeerr != nil {
 361                                 runner.CrunchLog.Printf("While closing stderr logs: %v", closeerr)
 362                         }
 363
 364                         runner.loggingDone <- true
 365                         close(runner.loggingDone)
 366                         return
 367                 }
 368         }
 369 }
 370
 371 // AttachLogs connects the docker container stdout and stderr logs to the
 372 // Arvados logger which logs to Keep and the API server logs table.
 373 func (runner *ContainerRunner) AttachStreams() (err error) {
 374
 375         runner.CrunchLog.Print("Attaching container streams")
 376
 377         var containerReader io.Reader
 378         containerReader, err = runner.Docker.AttachContainer(runner.ContainerID,
 379                 &dockerclient.AttachOptions{Stream: true, Stdout: true, Stderr: true})
 380         if err != nil {
 381                 return fmt.Errorf("While attaching container stdout/stderr streams: %v", err)
 382         }
 383
 384         runner.loggingDone = make(chan bool)
 385
 386         runner.Stdout = NewThrottledLogger(runner.NewLogWriter("stdout"))
 387         runner.Stderr = NewThrottledLogger(runner.NewLogWriter("stderr"))
 388
 389         go runner.ProcessDockerAttach(containerReader)
 390
 391         return nil
 392 }
 393
 394 // StartContainer creates the container and runs it.
 395 func (runner *ContainerRunner) StartContainer() (err error) {
 396         runner.CrunchLog.Print("Creating Docker container")
 397
 398         runner.CancelLock.Lock()
 399         defer runner.CancelLock.Unlock()
 400
 401         if runner.Cancelled {
 402                 return ErrCancelled
 403         }
 404
 405         runner.ContainerConfig.Cmd = runner.ContainerRecord.Command
 406         if runner.ContainerRecord.Cwd != "." {
 407                 runner.ContainerConfig.WorkingDir = runner.ContainerRecord.Cwd
 408         }
 409         for k, v := range runner.ContainerRecord.Environment {
 410                 runner.ContainerConfig.Env = append(runner.ContainerConfig.Env, k+"="+v)
 411         }
 412         runner.ContainerConfig.NetworkDisabled = true
 413         runner.ContainerID, err = runner.Docker.CreateContainer(&runner.ContainerConfig, "", nil)
 414         if err != nil {
 415                 return fmt.Errorf("While creating container: %v", err)
 416         }
 417         hostConfig := &dockerclient.HostConfig{Binds: runner.Binds,
 418                 LogConfig: dockerclient.LogConfig{Type: "none"}}
 419
 420         err = runner.AttachStreams()
 421         if err != nil {
 422                 return err
 423         }
 424
 425         runner.CrunchLog.Printf("Starting Docker container id '%s'", runner.ContainerID)
 426         err = runner.Docker.StartContainer(runner.ContainerID, hostConfig)
 427         if err != nil {
 428                 return fmt.Errorf("While starting container: %v", err)
 429         }
 430
 431         return nil
 432 }
 433
 434 // WaitFinish waits for the container to terminate, capture the exit code, and
 435 // close the stdout/stderr logging.
 436 func (runner *ContainerRunner) WaitFinish() error {
 437         runner.CrunchLog.Print("Waiting for container to finish")
 438
 439         result := runner.Docker.Wait(runner.ContainerID)
 440         wr := <-result
 441         if wr.Error != nil {
 442                 return fmt.Errorf("While waiting for container to finish: %v", wr.Error)
 443         }
 444         runner.ExitCode = &wr.ExitCode
 445
 446         // wait for stdout/stderr to complete
 447         <-runner.loggingDone
 448
 449         return nil
 450 }
 451
 452 // HandleOutput sets the output, unmounts the FUSE mount, and deletes temporary directories
 453 func (runner *ContainerRunner) CaptureOutput() error {
 454         if runner.finalState != "Complete" {
 455                 return nil
 456         }
 457
 458         if runner.HostOutputDir == "" {
 459                 return nil
 460         }
 461
 462         _, err := os.Stat(runner.HostOutputDir)
 463         if err != nil {
 464                 return fmt.Errorf("While checking host output path: %v", err)
 465         }
 466
 467         var manifestText string
 468
 469         collectionMetafile := fmt.Sprintf("%s/.arvados#collection", runner.HostOutputDir)
 470         _, err = os.Stat(collectionMetafile)
 471         if err != nil {
 472                 // Regular directory
 473                 cw := CollectionWriter{runner.Kc, nil, sync.Mutex{}}
 474                 manifestText, err = cw.WriteTree(runner.HostOutputDir, runner.CrunchLog.Logger)
 475                 if err != nil {
 476                         return fmt.Errorf("While uploading output files: %v", err)
 477                 }
 478         } else {
 479                 // FUSE mount directory
 480                 file, openerr := os.Open(collectionMetafile)
 481                 if openerr != nil {
 482                         return fmt.Errorf("While opening FUSE metafile: %v", err)
 483                 }
 484                 defer file.Close()
 485
 486                 rec := CollectionRecord{}
 487                 err = json.NewDecoder(file).Decode(&rec)
 488                 if err != nil {
 489                         return fmt.Errorf("While reading FUSE metafile: %v", err)
 490                 }
 491                 manifestText = rec.ManifestText
 492         }
 493
 494         var response CollectionRecord
 495         err = runner.ArvClient.Create("collections",
 496                 arvadosclient.Dict{
 497                         "collection": arvadosclient.Dict{
 498                                 "manifest_text": manifestText}},
 499                 &response)
 500         if err != nil {
 501                 return fmt.Errorf("While creating output collection: %v", err)
 502         }
 503
 504         runner.OutputPDH = new(string)
 505         *runner.OutputPDH = response.PortableDataHash
 506
 507         return nil
 508 }
 509
 510 func (runner *ContainerRunner) CleanupDirs() {
 511         if runner.ArvMount != nil {
 512                 umount := exec.Command("fusermount", "-z", "-u", runner.ArvMountPoint)
 513                 umnterr := umount.Run()
 514                 if umnterr != nil {
 515                         runner.CrunchLog.Printf("While running fusermount: %v", umnterr)
 516                 }
 517
 518                 mnterr := <-runner.ArvMountExit
 519                 if mnterr != nil {
 520                         runner.CrunchLog.Printf("Arv-mount exit error: %v", mnterr)
 521                 }
 522         }
 523
 524         for _, tmpdir := range runner.CleanupTempDir {
 525                 rmerr := os.RemoveAll(tmpdir)
 526                 if rmerr != nil {
 527                         runner.CrunchLog.Printf("While cleaning up temporary directory %s: %v", tmpdir, rmerr)
 528                 }
 529         }
 530 }
 531
 532 // CommitLogs posts the collection containing the final container logs.
 533 func (runner *ContainerRunner) CommitLogs() error {
 534         runner.CrunchLog.Print(runner.finalState)
 535         runner.CrunchLog.Close()
 536
 537         // Closing CrunchLog above allows it to be committed to Keep at this
 538         // point, but re-open crunch log with ArvClient in case there are any
 539         // other further (such as failing to write the log to Keep!) while
 540         // shutting down
 541         runner.CrunchLog = NewThrottledLogger(&ArvLogWriter{runner.ArvClient, runner.ContainerRecord.UUID,
 542                 "crunch-run", nil})
 543
 544         mt, err := runner.LogCollection.ManifestText()
 545         if err != nil {
 546                 return fmt.Errorf("While creating log manifest: %v", err)
 547         }
 548
 549         var response CollectionRecord
 550         err = runner.ArvClient.Create("collections",
 551                 arvadosclient.Dict{
 552                         "collection": arvadosclient.Dict{
 553                                 "name":          "logs for " + runner.ContainerRecord.UUID,
 554                                 "manifest_text": mt}},
 555                 &response)
 556         if err != nil {
 557                 return fmt.Errorf("While creating log collection: %v", err)
 558         }
 559
 560         runner.LogsPDH = new(string)
 561         *runner.LogsPDH = response.PortableDataHash
 562
 563         return nil
 564 }
 565
 566 // UpdateContainerRecordRunning updates the container state to "Running"
 567 func (runner *ContainerRunner) UpdateContainerRecordRunning() error {
 568         return runner.ArvClient.Update("containers", runner.ContainerRecord.UUID,
 569                 arvadosclient.Dict{"container": arvadosclient.Dict{"state": "Running"}}, nil)
 570 }
 571
 572 // UpdateContainerRecordComplete updates the container record state on API
 573 // server to "Complete" or "Cancelled"
 574 func (runner *ContainerRunner) UpdateContainerRecordComplete() error {
 575         update := arvadosclient.Dict{}
 576         if runner.LogsPDH != nil {
 577                 update["log"] = *runner.LogsPDH
 578         }
 579         if runner.ExitCode != nil {
 580                 update["exit_code"] = *runner.ExitCode
 581         }
 582         if runner.OutputPDH != nil {
 583                 update["output"] = runner.OutputPDH
 584         }
 585
 586         update["state"] = runner.finalState
 587
 588         return runner.ArvClient.Update("containers", runner.ContainerRecord.UUID, arvadosclient.Dict{"container": update}, nil)
 589 }
 590
 591 // NewArvLogWriter creates an ArvLogWriter
 592 func (runner *ContainerRunner) NewArvLogWriter(name string) io.WriteCloser {
 593         return &ArvLogWriter{runner.ArvClient, runner.ContainerRecord.UUID, name, runner.LogCollection.Open(name + ".txt")}
 594 }
 595
 596 // Run the full container lifecycle.
 597 func (runner *ContainerRunner) Run() (err error) {
 598         runner.CrunchLog.Printf("Executing container '%s'", runner.ContainerRecord.UUID)
 599
 600         hostname, hosterr := os.Hostname()
 601         if hosterr != nil {
 602                 runner.CrunchLog.Printf("Error getting hostname '%v'", hosterr)
 603         } else {
 604                 runner.CrunchLog.Printf("Executing on host '%s'", hostname)
 605         }
 606
 607         var runerr, waiterr error
 608
 609         defer func() {
 610                 if err != nil {
 611                         runner.CrunchLog.Print(err)
 612                 }
 613
 614                 if runner.Cancelled {
 615                         runner.finalState = "Cancelled"
 616                 } else {
 617                         runner.finalState = "Complete"
 618                 }
 619
 620                 // (6) capture output
 621                 outputerr := runner.CaptureOutput()
 622                 if outputerr != nil {
 623                         runner.CrunchLog.Print(outputerr)
 624                 }
 625
 626                 // (7) clean up temporary directories
 627                 runner.CleanupDirs()
 628
 629                 // (8) write logs
 630                 logerr := runner.CommitLogs()
 631                 if logerr != nil {
 632                         runner.CrunchLog.Print(logerr)
 633                 }
 634
 635                 // (9) update container record with results
 636                 updateerr := runner.UpdateContainerRecordComplete()
 637                 if updateerr != nil {
 638                         runner.CrunchLog.Print(updateerr)
 639                 }
 640
 641                 runner.CrunchLog.Close()
 642
 643                 if err == nil {
 644                         if runerr != nil {
 645                                 err = runerr
 646                         } else if waiterr != nil {
 647                                 err = waiterr
 648                         } else if logerr != nil {
 649                                 err = logerr
 650                         } else if updateerr != nil {
 651                                 err = updateerr
 652                         }
 653                 }
 654         }()
 655
 656         err = runner.ArvClient.Get("containers", runner.ContainerRecord.UUID, nil, &runner.ContainerRecord)
 657         if err != nil {
 658                 return fmt.Errorf("While getting container record: %v", err)
 659         }
 660
 661         // (1) setup signal handling
 662         runner.SetupSignals()
 663
 664         // (2) check for and/or load image
 665         err = runner.LoadImage()
 666         if err != nil {
 667                 return fmt.Errorf("While loading container image: %v", err)
 668         }
 669
 670         // (3) set up FUSE mount and binds
 671         err = runner.SetupMounts()
 672         if err != nil {
 673                 return fmt.Errorf("While setting up mounts: %v", err)
 674         }
 675
 676         // (3) create and start container
 677         err = runner.StartContainer()
 678         if err != nil {
 679                 if err == ErrCancelled {
 680                         err = nil
 681                 }
 682                 return
 683         }
 684
 685         // (4) update container record state
 686         err = runner.UpdateContainerRecordRunning()
 687         if err != nil {
 688                 runner.CrunchLog.Print(err)
 689         }
 690
 691         // (5) wait for container to finish
 692         waiterr = runner.WaitFinish()
 693
 694         return
 695 }
 696
 697 // NewContainerRunner creates a new container runner.
 698 func NewContainerRunner(api IArvadosClient,
 699         kc IKeepClient,
 700         docker ThinDockerClient,
 701         containerUUID string) *ContainerRunner {
 702
 703         cr := &ContainerRunner{ArvClient: api, Kc: kc, Docker: docker}
 704         cr.NewLogWriter = cr.NewArvLogWriter
 705         cr.RunArvMount = cr.ArvMountCmd
 706         cr.MkTempDir = ioutil.TempDir
 707         cr.LogCollection = &CollectionWriter{kc, nil, sync.Mutex{}}
 708         cr.ContainerRecord.UUID = containerUUID
 709         cr.CrunchLog = NewThrottledLogger(cr.NewLogWriter("crunch-run"))
 710         cr.CrunchLog.Immediate = log.New(os.Stderr, containerUUID+" ", 0)
 711         return cr
 712 }
 713
 714 func main() {
 715         flag.Parse()
 716
 717         containerId := flag.Arg(0)
 718
 719         api, err := arvadosclient.MakeArvadosClient()
 720         if err != nil {
 721                 log.Fatalf("%s: %v", containerId, err)
 722         }
 723         api.Retries = 8
 724
 725         var kc *keepclient.KeepClient
 726         kc, err = keepclient.MakeKeepClient(&api)
 727         if err != nil {
 728                 log.Fatalf("%s: %v", containerId, err)
 729         }
 730         kc.Retries = 4
 731
 732         var docker *dockerclient.DockerClient
 733         docker, err = dockerclient.NewDockerClient("unix:///var/run/docker.sock", nil)
 734         if err != nil {
 735                 log.Fatalf("%s: %v", containerId, err)
 736         }
 737
 738         cr := NewContainerRunner(api, kc, docker, containerId)
 739
 740         err = cr.Run()
 741         if err != nil {
 742                 log.Fatalf("%s: %v", containerId, err)
 743         }
 744
 745 }