services/crunch-run/crunchrun.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         "bytes"
   9         "encoding/json"
  10         "errors"
  11         "flag"
  12         "fmt"
  13         "io"
  14         "io/ioutil"
  15         "log"
  16         "os"
  17         "os/exec"
  18         "os/signal"
  19         "path"
  20         "path/filepath"
  21         "regexp"
  22         "runtime"
  23         "runtime/pprof"
  24         "sort"
  25         "strings"
  26         "sync"
  27         "syscall"
  28         "time"
  29
  30         "git.curoverse.com/arvados.git/lib/crunchstat"
  31         "git.curoverse.com/arvados.git/sdk/go/arvados"
  32         "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
  33         "git.curoverse.com/arvados.git/sdk/go/keepclient"
  34         "git.curoverse.com/arvados.git/sdk/go/manifest"
  35         "github.com/shirou/gopsutil/process"
  36         "golang.org/x/net/context"
  37
  38         dockertypes "github.com/docker/docker/api/types"
  39         dockercontainer "github.com/docker/docker/api/types/container"
  40         dockernetwork "github.com/docker/docker/api/types/network"
  41         dockerclient "github.com/docker/docker/client"
  42 )
  43
  44 var version = "dev"
  45
  46 // IArvadosClient is the minimal Arvados API methods used by crunch-run.
  47 type IArvadosClient interface {
  48         Create(resourceType string, parameters arvadosclient.Dict, output interface{}) error
  49         Get(resourceType string, uuid string, parameters arvadosclient.Dict, output interface{}) error
  50         Update(resourceType string, uuid string, parameters arvadosclient.Dict, output interface{}) error
  51         Call(method, resourceType, uuid, action string, parameters arvadosclient.Dict, output interface{}) error
  52         CallRaw(method string, resourceType string, uuid string, action string, parameters arvadosclient.Dict) (reader io.ReadCloser, err error)
  53         Discovery(key string) (interface{}, error)
  54 }
  55
  56 // ErrCancelled is the error returned when the container is cancelled.
  57 var ErrCancelled = errors.New("Cancelled")
  58
  59 // IKeepClient is the minimal Keep API methods used by crunch-run.
  60 type IKeepClient interface {
  61         PutB(buf []byte) (string, int, error)
  62         ReadAt(locator string, p []byte, off int) (int, error)
  63         ManifestFileReader(m manifest.Manifest, filename string) (arvados.File, error)
  64         ClearBlockCache()
  65 }
  66
  67 // NewLogWriter is a factory function to create a new log writer.
  68 type NewLogWriter func(name string) (io.WriteCloser, error)
  69
  70 type RunArvMount func(args []string, tok string) (*exec.Cmd, error)
  71
  72 type MkTempDir func(string, string) (string, error)
  73
  74 // ThinDockerClient is the minimal Docker client interface used by crunch-run.
  75 type ThinDockerClient interface {
  76         ContainerAttach(ctx context.Context, container string, options dockertypes.ContainerAttachOptions) (dockertypes.HijackedResponse, error)
  77         ContainerCreate(ctx context.Context, config *dockercontainer.Config, hostConfig *dockercontainer.HostConfig,
  78                 networkingConfig *dockernetwork.NetworkingConfig, containerName string) (dockercontainer.ContainerCreateCreatedBody, error)
  79         ContainerStart(ctx context.Context, container string, options dockertypes.ContainerStartOptions) error
  80         ContainerRemove(ctx context.Context, container string, options dockertypes.ContainerRemoveOptions) error
  81         ContainerWait(ctx context.Context, container string, condition dockercontainer.WaitCondition) (<-chan dockercontainer.ContainerWaitOKBody, <-chan error)
  82         ImageInspectWithRaw(ctx context.Context, image string) (dockertypes.ImageInspect, []byte, error)
  83         ImageLoad(ctx context.Context, input io.Reader, quiet bool) (dockertypes.ImageLoadResponse, error)
  84         ImageRemove(ctx context.Context, image string, options dockertypes.ImageRemoveOptions) ([]dockertypes.ImageDeleteResponseItem, error)
  85 }
  86
  87 type PsProcess interface {
  88         CmdlineSlice() ([]string, error)
  89 }
  90
  91 // ContainerRunner is the main stateful struct used for a single execution of a
  92 // container.
  93 type ContainerRunner struct {
  94         Docker    ThinDockerClient
  95         client    *arvados.Client
  96         ArvClient IArvadosClient
  97         Kc        IKeepClient
  98         arvados.Container
  99         ContainerConfig dockercontainer.Config
 100         dockercontainer.HostConfig
 101         token       string
 102         ContainerID string
 103         ExitCode    *int
 104         NewLogWriter
 105         loggingDone   chan bool
 106         CrunchLog     *ThrottledLogger
 107         Stdout        io.WriteCloser
 108         Stderr        io.WriteCloser
 109         LogCollection arvados.CollectionFileSystem
 110         LogsPDH       *string
 111         RunArvMount
 112         MkTempDir
 113         ArvMount      *exec.Cmd
 114         ArvMountPoint string
 115         HostOutputDir string
 116         Binds         []string
 117         Volumes       map[string]struct{}
 118         OutputPDH     *string
 119         SigChan       chan os.Signal
 120         ArvMountExit  chan error
 121         SecretMounts  map[string]arvados.Mount
 122         MkArvClient   func(token string) (IArvadosClient, error)
 123         finalState    string
 124         parentTemp    string
 125
 126         ListProcesses func() ([]PsProcess, error)
 127
 128         statLogger       io.WriteCloser
 129         statReporter     *crunchstat.Reporter
 130         hoststatLogger   io.WriteCloser
 131         hoststatReporter *crunchstat.Reporter
 132         statInterval     time.Duration
 133         cgroupRoot       string
 134         // What we expect the container's cgroup parent to be.
 135         expectCgroupParent string
 136         // What we tell docker to use as the container's cgroup
 137         // parent. Note: Ideally we would use the same field for both
 138         // expectCgroupParent and setCgroupParent, and just make it
 139         // default to "docker". However, when using docker < 1.10 with
 140         // systemd, specifying a non-empty cgroup parent (even the
 141         // default value "docker") hits a docker bug
 142         // (https://github.com/docker/docker/issues/17126). Using two
 143         // separate fields makes it possible to use the "expect cgroup
 144         // parent to be X" feature even on sites where the "specify
 145         // cgroup parent" feature breaks.
 146         setCgroupParent string
 147
 148         cStateLock sync.Mutex
 149         cCancelled bool // StopContainer() invoked
 150
 151         enableNetwork   string // one of "default" or "always"
 152         networkMode     string // passed through to HostConfig.NetworkMode
 153         arvMountLog     *ThrottledLogger
 154         checkContainerd time.Duration
 155 }
 156
 157 // setupSignals sets up signal handling to gracefully terminate the underlying
 158 // Docker container and update state when receiving a TERM, INT or QUIT signal.
 159 func (runner *ContainerRunner) setupSignals() {
 160         runner.SigChan = make(chan os.Signal, 1)
 161         signal.Notify(runner.SigChan, syscall.SIGTERM)
 162         signal.Notify(runner.SigChan, syscall.SIGINT)
 163         signal.Notify(runner.SigChan, syscall.SIGQUIT)
 164
 165         go func(sig chan os.Signal) {
 166                 for s := range sig {
 167                         runner.stop(s)
 168                 }
 169         }(runner.SigChan)
 170 }
 171
 172 // stop the underlying Docker container.
 173 func (runner *ContainerRunner) stop(sig os.Signal) {
 174         runner.cStateLock.Lock()
 175         defer runner.cStateLock.Unlock()
 176         if sig != nil {
 177                 runner.CrunchLog.Printf("caught signal: %v", sig)
 178         }
 179         if runner.ContainerID == "" {
 180                 return
 181         }
 182         runner.cCancelled = true
 183         runner.CrunchLog.Printf("removing container")
 184         err := runner.Docker.ContainerRemove(context.TODO(), runner.ContainerID, dockertypes.ContainerRemoveOptions{Force: true})
 185         if err != nil {
 186                 runner.CrunchLog.Printf("error removing container: %s", err)
 187         }
 188 }
 189
 190 var errorBlacklist = []string{
 191         "(?ms).*[Cc]annot connect to the Docker daemon.*",
 192         "(?ms).*oci runtime error.*starting container process.*container init.*mounting.*to rootfs.*no such file or directory.*",
 193         "(?ms).*grpc: the connection is unavailable.*",
 194 }
 195 var brokenNodeHook *string = flag.String("broken-node-hook", "", "Script to run if node is detected to be broken (for example, Docker daemon is not running)")
 196
 197 func (runner *ContainerRunner) runBrokenNodeHook() {
 198         if *brokenNodeHook == "" {
 199                 runner.CrunchLog.Printf("No broken node hook provided, cannot mark node as broken.")
 200         } else {
 201                 runner.CrunchLog.Printf("Running broken node hook %q", *brokenNodeHook)
 202                 // run killme script
 203                 c := exec.Command(*brokenNodeHook)
 204                 c.Stdout = runner.CrunchLog
 205                 c.Stderr = runner.CrunchLog
 206                 err := c.Run()
 207                 if err != nil {
 208                         runner.CrunchLog.Printf("Error running broken node hook: %v", err)
 209                 }
 210         }
 211 }
 212
 213 func (runner *ContainerRunner) checkBrokenNode(goterr error) bool {
 214         for _, d := range errorBlacklist {
 215                 if m, e := regexp.MatchString(d, goterr.Error()); m && e == nil {
 216                         runner.CrunchLog.Printf("Error suggests node is unable to run containers: %v", goterr)
 217                         runner.runBrokenNodeHook()
 218                         return true
 219                 }
 220         }
 221         return false
 222 }
 223
 224 // LoadImage determines the docker image id from the container record and
 225 // checks if it is available in the local Docker image store.  If not, it loads
 226 // the image from Keep.
 227 func (runner *ContainerRunner) LoadImage() (err error) {
 228
 229         runner.CrunchLog.Printf("Fetching Docker image from collection '%s'", runner.Container.ContainerImage)
 230
 231         var collection arvados.Collection
 232         err = runner.ArvClient.Get("collections", runner.Container.ContainerImage, nil, &collection)
 233         if err != nil {
 234                 return fmt.Errorf("While getting container image collection: %v", err)
 235         }
 236         manifest := manifest.Manifest{Text: collection.ManifestText}
 237         var img, imageID string
 238         for ms := range manifest.StreamIter() {
 239                 img = ms.FileStreamSegments[0].Name
 240                 if !strings.HasSuffix(img, ".tar") {
 241                         return fmt.Errorf("First file in the container image collection does not end in .tar")
 242                 }
 243                 imageID = img[:len(img)-4]
 244         }
 245
 246         runner.CrunchLog.Printf("Using Docker image id '%s'", imageID)
 247
 248         _, _, err = runner.Docker.ImageInspectWithRaw(context.TODO(), imageID)
 249         if err != nil {
 250                 runner.CrunchLog.Print("Loading Docker image from keep")
 251
 252                 var readCloser io.ReadCloser
 253                 readCloser, err = runner.Kc.ManifestFileReader(manifest, img)
 254                 if err != nil {
 255                         return fmt.Errorf("While creating ManifestFileReader for container image: %v", err)
 256                 }
 257
 258                 response, err := runner.Docker.ImageLoad(context.TODO(), readCloser, true)
 259                 if err != nil {
 260                         return fmt.Errorf("While loading container image into Docker: %v", err)
 261                 }
 262
 263                 defer response.Body.Close()
 264                 rbody, err := ioutil.ReadAll(response.Body)
 265                 if err != nil {
 266                         return fmt.Errorf("Reading response to image load: %v", err)
 267                 }
 268                 runner.CrunchLog.Printf("Docker response: %s", rbody)
 269         } else {
 270                 runner.CrunchLog.Print("Docker image is available")
 271         }
 272
 273         runner.ContainerConfig.Image = imageID
 274
 275         runner.Kc.ClearBlockCache()
 276
 277         return nil
 278 }
 279
 280 func (runner *ContainerRunner) ArvMountCmd(arvMountCmd []string, token string) (c *exec.Cmd, err error) {
 281         c = exec.Command("arv-mount", arvMountCmd...)
 282
 283         // Copy our environment, but override ARVADOS_API_TOKEN with
 284         // the container auth token.
 285         c.Env = nil
 286         for _, s := range os.Environ() {
 287                 if !strings.HasPrefix(s, "ARVADOS_API_TOKEN=") {
 288                         c.Env = append(c.Env, s)
 289                 }
 290         }
 291         c.Env = append(c.Env, "ARVADOS_API_TOKEN="+token)
 292
 293         w, err := runner.NewLogWriter("arv-mount")
 294         if err != nil {
 295                 return nil, err
 296         }
 297         runner.arvMountLog = NewThrottledLogger(w)
 298         c.Stdout = runner.arvMountLog
 299         c.Stderr = runner.arvMountLog
 300
 301         runner.CrunchLog.Printf("Running %v", c.Args)
 302
 303         err = c.Start()
 304         if err != nil {
 305                 return nil, err
 306         }
 307
 308         statReadme := make(chan bool)
 309         runner.ArvMountExit = make(chan error)
 310
 311         keepStatting := true
 312         go func() {
 313                 for keepStatting {
 314                         time.Sleep(100 * time.Millisecond)
 315                         _, err = os.Stat(fmt.Sprintf("%s/by_id/README", runner.ArvMountPoint))
 316                         if err == nil {
 317                                 keepStatting = false
 318                                 statReadme <- true
 319                         }
 320                 }
 321                 close(statReadme)
 322         }()
 323
 324         go func() {
 325                 mnterr := c.Wait()
 326                 if mnterr != nil {
 327                         runner.CrunchLog.Printf("Arv-mount exit error: %v", mnterr)
 328                 }
 329                 runner.ArvMountExit <- mnterr
 330                 close(runner.ArvMountExit)
 331         }()
 332
 333         select {
 334         case <-statReadme:
 335                 break
 336         case err := <-runner.ArvMountExit:
 337                 runner.ArvMount = nil
 338                 keepStatting = false
 339                 return nil, err
 340         }
 341
 342         return c, nil
 343 }
 344
 345 func (runner *ContainerRunner) SetupArvMountPoint(prefix string) (err error) {
 346         if runner.ArvMountPoint == "" {
 347                 runner.ArvMountPoint, err = runner.MkTempDir(runner.parentTemp, prefix)
 348         }
 349         return
 350 }
 351
 352 func copyfile(src string, dst string) (err error) {
 353         srcfile, err := os.Open(src)
 354         if err != nil {
 355                 return
 356         }
 357
 358         os.MkdirAll(path.Dir(dst), 0777)
 359
 360         dstfile, err := os.Create(dst)
 361         if err != nil {
 362                 return
 363         }
 364         _, err = io.Copy(dstfile, srcfile)
 365         if err != nil {
 366                 return
 367         }
 368
 369         err = srcfile.Close()
 370         err2 := dstfile.Close()
 371
 372         if err != nil {
 373                 return
 374         }
 375
 376         if err2 != nil {
 377                 return err2
 378         }
 379
 380         return nil
 381 }
 382
 383 func (runner *ContainerRunner) SetupMounts() (err error) {
 384         err = runner.SetupArvMountPoint("keep")
 385         if err != nil {
 386                 return fmt.Errorf("While creating keep mount temp dir: %v", err)
 387         }
 388
 389         token, err := runner.ContainerToken()
 390         if err != nil {
 391                 return fmt.Errorf("could not get container token: %s", err)
 392         }
 393
 394         pdhOnly := true
 395         tmpcount := 0
 396         arvMountCmd := []string{
 397                 "--foreground",
 398                 "--allow-other",
 399                 "--read-write",
 400                 fmt.Sprintf("--crunchstat-interval=%v", runner.statInterval.Seconds())}
 401
 402         if runner.Container.RuntimeConstraints.KeepCacheRAM > 0 {
 403                 arvMountCmd = append(arvMountCmd, "--file-cache", fmt.Sprintf("%d", runner.Container.RuntimeConstraints.KeepCacheRAM))
 404         }
 405
 406         collectionPaths := []string{}
 407         runner.Binds = nil
 408         runner.Volumes = make(map[string]struct{})
 409         needCertMount := true
 410         type copyFile struct {
 411                 src  string
 412                 bind string
 413         }
 414         var copyFiles []copyFile
 415
 416         var binds []string
 417         for bind := range runner.Container.Mounts {
 418                 binds = append(binds, bind)
 419         }
 420         for bind := range runner.SecretMounts {
 421                 if _, ok := runner.Container.Mounts[bind]; ok {
 422                         return fmt.Errorf("Secret mount %q conflicts with regular mount", bind)
 423                 }
 424                 if runner.SecretMounts[bind].Kind != "json" &&
 425                         runner.SecretMounts[bind].Kind != "text" {
 426                         return fmt.Errorf("Secret mount %q type is %q but only 'json' and 'text' are permitted.",
 427                                 bind, runner.SecretMounts[bind].Kind)
 428                 }
 429                 binds = append(binds, bind)
 430         }
 431         sort.Strings(binds)
 432
 433         for _, bind := range binds {
 434                 mnt, ok := runner.Container.Mounts[bind]
 435                 if !ok {
 436                         mnt = runner.SecretMounts[bind]
 437                 }
 438                 if bind == "stdout" || bind == "stderr" {
 439                         // Is it a "file" mount kind?
 440                         if mnt.Kind != "file" {
 441                                 return fmt.Errorf("Unsupported mount kind '%s' for %s. Only 'file' is supported.", mnt.Kind, bind)
 442                         }
 443
 444                         // Does path start with OutputPath?
 445                         prefix := runner.Container.OutputPath
 446                         if !strings.HasSuffix(prefix, "/") {
 447                                 prefix += "/"
 448                         }
 449                         if !strings.HasPrefix(mnt.Path, prefix) {
 450                                 return fmt.Errorf("%s path does not start with OutputPath: %s, %s", strings.Title(bind), mnt.Path, prefix)
 451                         }
 452                 }
 453
 454                 if bind == "stdin" {
 455                         // Is it a "collection" mount kind?
 456                         if mnt.Kind != "collection" && mnt.Kind != "json" {
 457                                 return fmt.Errorf("Unsupported mount kind '%s' for stdin. Only 'collection' or 'json' are supported.", mnt.Kind)
 458                         }
 459                 }
 460
 461                 if bind == "/etc/arvados/ca-certificates.crt" {
 462                         needCertMount = false
 463                 }
 464
 465                 if strings.HasPrefix(bind, runner.Container.OutputPath+"/") && bind != runner.Container.OutputPath+"/" {
 466                         if mnt.Kind != "collection" && mnt.Kind != "text" && mnt.Kind != "json" {
 467                                 return fmt.Errorf("Only mount points of kind 'collection', 'text' or 'json' are supported underneath the output_path for %q, was %q", bind, mnt.Kind)
 468                         }
 469                 }
 470
 471                 switch {
 472                 case mnt.Kind == "collection" && bind != "stdin":
 473                         var src string
 474                         if mnt.UUID != "" && mnt.PortableDataHash != "" {
 475                                 return fmt.Errorf("Cannot specify both 'uuid' and 'portable_data_hash' for a collection mount")
 476                         }
 477                         if mnt.UUID != "" {
 478                                 if mnt.Writable {
 479                                         return fmt.Errorf("Writing to existing collections currently not permitted.")
 480                                 }
 481                                 pdhOnly = false
 482                                 src = fmt.Sprintf("%s/by_id/%s", runner.ArvMountPoint, mnt.UUID)
 483                         } else if mnt.PortableDataHash != "" {
 484                                 if mnt.Writable && !strings.HasPrefix(bind, runner.Container.OutputPath+"/") {
 485                                         return fmt.Errorf("Can never write to a collection specified by portable data hash")
 486                                 }
 487                                 idx := strings.Index(mnt.PortableDataHash, "/")
 488                                 if idx > 0 {
 489                                         mnt.Path = path.Clean(mnt.PortableDataHash[idx:])
 490                                         mnt.PortableDataHash = mnt.PortableDataHash[0:idx]
 491                                         runner.Container.Mounts[bind] = mnt
 492                                 }
 493                                 src = fmt.Sprintf("%s/by_id/%s", runner.ArvMountPoint, mnt.PortableDataHash)
 494                                 if mnt.Path != "" && mnt.Path != "." {
 495                                         if strings.HasPrefix(mnt.Path, "./") {
 496                                                 mnt.Path = mnt.Path[2:]
 497                                         } else if strings.HasPrefix(mnt.Path, "/") {
 498                                                 mnt.Path = mnt.Path[1:]
 499                                         }
 500                                         src += "/" + mnt.Path
 501                                 }
 502                         } else {
 503                                 src = fmt.Sprintf("%s/tmp%d", runner.ArvMountPoint, tmpcount)
 504                                 arvMountCmd = append(arvMountCmd, "--mount-tmp")
 505                                 arvMountCmd = append(arvMountCmd, fmt.Sprintf("tmp%d", tmpcount))
 506                                 tmpcount += 1
 507                         }
 508                         if mnt.Writable {
 509                                 if bind == runner.Container.OutputPath {
 510                                         runner.HostOutputDir = src
 511                                         runner.Binds = append(runner.Binds, fmt.Sprintf("%s:%s", src, bind))
 512                                 } else if strings.HasPrefix(bind, runner.Container.OutputPath+"/") {
 513                                         copyFiles = append(copyFiles, copyFile{src, runner.HostOutputDir + bind[len(runner.Container.OutputPath):]})
 514                                 } else {
 515                                         runner.Binds = append(runner.Binds, fmt.Sprintf("%s:%s", src, bind))
 516                                 }
 517                         } else {
 518                                 runner.Binds = append(runner.Binds, fmt.Sprintf("%s:%s:ro", src, bind))
 519                         }
 520                         collectionPaths = append(collectionPaths, src)
 521
 522                 case mnt.Kind == "tmp":
 523                         var tmpdir string
 524                         tmpdir, err = runner.MkTempDir(runner.parentTemp, "tmp")
 525                         if err != nil {
 526                                 return fmt.Errorf("While creating mount temp dir: %v", err)
 527                         }
 528                         st, staterr := os.Stat(tmpdir)
 529                         if staterr != nil {
 530                                 return fmt.Errorf("While Stat on temp dir: %v", staterr)
 531                         }
 532                         err = os.Chmod(tmpdir, st.Mode()|os.ModeSetgid|0777)
 533                         if staterr != nil {
 534                                 return fmt.Errorf("While Chmod temp dir: %v", err)
 535                         }
 536                         runner.Binds = append(runner.Binds, fmt.Sprintf("%s:%s", tmpdir, bind))
 537                         if bind == runner.Container.OutputPath {
 538                                 runner.HostOutputDir = tmpdir
 539                         }
 540
 541                 case mnt.Kind == "json" || mnt.Kind == "text":
 542                         var filedata []byte
 543                         if mnt.Kind == "json" {
 544                                 filedata, err = json.Marshal(mnt.Content)
 545                                 if err != nil {
 546                                         return fmt.Errorf("encoding json data: %v", err)
 547                                 }
 548                         } else {
 549                                 text, ok := mnt.Content.(string)
 550                                 if !ok {
 551                                         return fmt.Errorf("content for mount %q must be a string", bind)
 552                                 }
 553                                 filedata = []byte(text)
 554                         }
 555
 556                         tmpdir, err := runner.MkTempDir(runner.parentTemp, mnt.Kind)
 557                         if err != nil {
 558                                 return fmt.Errorf("creating temp dir: %v", err)
 559                         }
 560                         tmpfn := filepath.Join(tmpdir, "mountdata."+mnt.Kind)
 561                         err = ioutil.WriteFile(tmpfn, filedata, 0444)
 562                         if err != nil {
 563                                 return fmt.Errorf("writing temp file: %v", err)
 564                         }
 565                         if strings.HasPrefix(bind, runner.Container.OutputPath+"/") {
 566                                 copyFiles = append(copyFiles, copyFile{tmpfn, runner.HostOutputDir + bind[len(runner.Container.OutputPath):]})
 567                         } else {
 568                                 runner.Binds = append(runner.Binds, fmt.Sprintf("%s:%s:ro", tmpfn, bind))
 569                         }
 570
 571                 case mnt.Kind == "git_tree":
 572                         tmpdir, err := runner.MkTempDir(runner.parentTemp, "git_tree")
 573                         if err != nil {
 574                                 return fmt.Errorf("creating temp dir: %v", err)
 575                         }
 576                         err = gitMount(mnt).extractTree(runner.ArvClient, tmpdir, token)
 577                         if err != nil {
 578                                 return err
 579                         }
 580                         runner.Binds = append(runner.Binds, tmpdir+":"+bind+":ro")
 581                 }
 582         }
 583
 584         if runner.HostOutputDir == "" {
 585                 return fmt.Errorf("Output path does not correspond to a writable mount point")
 586         }
 587
 588         if wantAPI := runner.Container.RuntimeConstraints.API; needCertMount && wantAPI != nil && *wantAPI {
 589                 for _, certfile := range arvadosclient.CertFiles {
 590                         _, err := os.Stat(certfile)
 591                         if err == nil {
 592                                 runner.Binds = append(runner.Binds, fmt.Sprintf("%s:/etc/arvados/ca-certificates.crt:ro", certfile))
 593                                 break
 594                         }
 595                 }
 596         }
 597
 598         if pdhOnly {
 599                 arvMountCmd = append(arvMountCmd, "--mount-by-pdh", "by_id")
 600         } else {
 601                 arvMountCmd = append(arvMountCmd, "--mount-by-id", "by_id")
 602         }
 603         arvMountCmd = append(arvMountCmd, runner.ArvMountPoint)
 604
 605         runner.ArvMount, err = runner.RunArvMount(arvMountCmd, token)
 606         if err != nil {
 607                 return fmt.Errorf("While trying to start arv-mount: %v", err)
 608         }
 609
 610         for _, p := range collectionPaths {
 611                 _, err = os.Stat(p)
 612                 if err != nil {
 613                         return fmt.Errorf("While checking that input files exist: %v", err)
 614                 }
 615         }
 616
 617         for _, cp := range copyFiles {
 618                 st, err := os.Stat(cp.src)
 619                 if err != nil {
 620                         return fmt.Errorf("While staging writable file from %q to %q: %v", cp.src, cp.bind, err)
 621                 }
 622                 if st.IsDir() {
 623                         err = filepath.Walk(cp.src, func(walkpath string, walkinfo os.FileInfo, walkerr error) error {
 624                                 if walkerr != nil {
 625                                         return walkerr
 626                                 }
 627                                 target := path.Join(cp.bind, walkpath[len(cp.src):])
 628                                 if walkinfo.Mode().IsRegular() {
 629                                         copyerr := copyfile(walkpath, target)
 630                                         if copyerr != nil {
 631                                                 return copyerr
 632                                         }
 633                                         return os.Chmod(target, walkinfo.Mode()|0777)
 634                                 } else if walkinfo.Mode().IsDir() {
 635                                         mkerr := os.MkdirAll(target, 0777)
 636                                         if mkerr != nil {
 637                                                 return mkerr
 638                                         }
 639                                         return os.Chmod(target, walkinfo.Mode()|os.ModeSetgid|0777)
 640                                 } else {
 641                                         return fmt.Errorf("Source %q is not a regular file or directory", cp.src)
 642                                 }
 643                         })
 644                 } else if st.Mode().IsRegular() {
 645                         err = copyfile(cp.src, cp.bind)
 646                         if err == nil {
 647                                 err = os.Chmod(cp.bind, st.Mode()|0777)
 648                         }
 649                 }
 650                 if err != nil {
 651                         return fmt.Errorf("While staging writable file from %q to %q: %v", cp.src, cp.bind, err)
 652                 }
 653         }
 654
 655         return nil
 656 }
 657
 658 func (runner *ContainerRunner) ProcessDockerAttach(containerReader io.Reader) {
 659         // Handle docker log protocol
 660         // https://docs.docker.com/engine/reference/api/docker_remote_api_v1.15/#attach-to-a-container
 661         defer close(runner.loggingDone)
 662
 663         header := make([]byte, 8)
 664         var err error
 665         for err == nil {
 666                 _, err = io.ReadAtLeast(containerReader, header, 8)
 667                 if err != nil {
 668                         if err == io.EOF {
 669                                 err = nil
 670                         }
 671                         break
 672                 }
 673                 readsize := int64(header[7]) | (int64(header[6]) << 8) | (int64(header[5]) << 16) | (int64(header[4]) << 24)
 674                 if header[0] == 1 {
 675                         // stdout
 676                         _, err = io.CopyN(runner.Stdout, containerReader, readsize)
 677                 } else {
 678                         // stderr
 679                         _, err = io.CopyN(runner.Stderr, containerReader, readsize)
 680                 }
 681         }
 682
 683         if err != nil {
 684                 runner.CrunchLog.Printf("error reading docker logs: %v", err)
 685         }
 686
 687         err = runner.Stdout.Close()
 688         if err != nil {
 689                 runner.CrunchLog.Printf("error closing stdout logs: %v", err)
 690         }
 691
 692         err = runner.Stderr.Close()
 693         if err != nil {
 694                 runner.CrunchLog.Printf("error closing stderr logs: %v", err)
 695         }
 696
 697         if runner.statReporter != nil {
 698                 runner.statReporter.Stop()
 699                 err = runner.statLogger.Close()
 700                 if err != nil {
 701                         runner.CrunchLog.Printf("error closing crunchstat logs: %v", err)
 702                 }
 703         }
 704 }
 705
 706 func (runner *ContainerRunner) stopHoststat() error {
 707         if runner.hoststatReporter == nil {
 708                 return nil
 709         }
 710         runner.hoststatReporter.Stop()
 711         err := runner.hoststatLogger.Close()
 712         if err != nil {
 713                 return fmt.Errorf("error closing hoststat logs: %v", err)
 714         }
 715         return nil
 716 }
 717
 718 func (runner *ContainerRunner) startHoststat() error {
 719         w, err := runner.NewLogWriter("hoststat")
 720         if err != nil {
 721                 return err
 722         }
 723         runner.hoststatLogger = NewThrottledLogger(w)
 724         runner.hoststatReporter = &crunchstat.Reporter{
 725                 Logger:     log.New(runner.hoststatLogger, "", 0),
 726                 CgroupRoot: runner.cgroupRoot,
 727                 PollPeriod: runner.statInterval,
 728         }
 729         runner.hoststatReporter.Start()
 730         return nil
 731 }
 732
 733 func (runner *ContainerRunner) startCrunchstat() error {
 734         w, err := runner.NewLogWriter("crunchstat")
 735         if err != nil {
 736                 return err
 737         }
 738         runner.statLogger = NewThrottledLogger(w)
 739         runner.statReporter = &crunchstat.Reporter{
 740                 CID:          runner.ContainerID,
 741                 Logger:       log.New(runner.statLogger, "", 0),
 742                 CgroupParent: runner.expectCgroupParent,
 743                 CgroupRoot:   runner.cgroupRoot,
 744                 PollPeriod:   runner.statInterval,
 745                 TempDir:      runner.parentTemp,
 746         }
 747         runner.statReporter.Start()
 748         return nil
 749 }
 750
 751 type infoCommand struct {
 752         label string
 753         cmd   []string
 754 }
 755
 756 // LogHostInfo logs info about the current host, for debugging and
 757 // accounting purposes. Although it's logged as "node-info", this is
 758 // about the environment where crunch-run is actually running, which
 759 // might differ from what's described in the node record (see
 760 // LogNodeRecord).
 761 func (runner *ContainerRunner) LogHostInfo() (err error) {
 762         w, err := runner.NewLogWriter("node-info")
 763         if err != nil {
 764                 return
 765         }
 766
 767         commands := []infoCommand{
 768                 {
 769                         label: "Host Information",
 770                         cmd:   []string{"uname", "-a"},
 771                 },
 772                 {
 773                         label: "CPU Information",
 774                         cmd:   []string{"cat", "/proc/cpuinfo"},
 775                 },
 776                 {
 777                         label: "Memory Information",
 778                         cmd:   []string{"cat", "/proc/meminfo"},
 779                 },
 780                 {
 781                         label: "Disk Space",
 782                         cmd:   []string{"df", "-m", "/", os.TempDir()},
 783                 },
 784                 {
 785                         label: "Disk INodes",
 786                         cmd:   []string{"df", "-i", "/", os.TempDir()},
 787                 },
 788         }
 789
 790         // Run commands with informational output to be logged.
 791         for _, command := range commands {
 792                 fmt.Fprintln(w, command.label)
 793                 cmd := exec.Command(command.cmd[0], command.cmd[1:]...)
 794                 cmd.Stdout = w
 795                 cmd.Stderr = w
 796                 if err := cmd.Run(); err != nil {
 797                         err = fmt.Errorf("While running command %q: %v", command.cmd, err)
 798                         fmt.Fprintln(w, err)
 799                         return err
 800                 }
 801                 fmt.Fprintln(w, "")
 802         }
 803
 804         err = w.Close()
 805         if err != nil {
 806                 return fmt.Errorf("While closing node-info logs: %v", err)
 807         }
 808         return nil
 809 }
 810
 811 // LogContainerRecord gets and saves the raw JSON container record from the API server
 812 func (runner *ContainerRunner) LogContainerRecord() error {
 813         logged, err := runner.logAPIResponse("container", "containers", map[string]interface{}{"filters": [][]string{{"uuid", "=", runner.Container.UUID}}}, nil)
 814         if !logged && err == nil {
 815                 err = fmt.Errorf("error: no container record found for %s", runner.Container.UUID)
 816         }
 817         return err
 818 }
 819
 820 // LogNodeRecord logs arvados#node record corresponding to the current host.
 821 func (runner *ContainerRunner) LogNodeRecord() error {
 822         hostname := os.Getenv("SLURMD_NODENAME")
 823         if hostname == "" {
 824                 hostname, _ = os.Hostname()
 825         }
 826         _, err := runner.logAPIResponse("node", "nodes", map[string]interface{}{"filters": [][]string{{"hostname", "=", hostname}}}, func(resp interface{}) {
 827                 // The "info" field has admin-only info when obtained
 828                 // with a privileged token, and should not be logged.
 829                 node, ok := resp.(map[string]interface{})
 830                 if ok {
 831                         delete(node, "info")
 832                 }
 833         })
 834         return err
 835 }
 836
 837 func (runner *ContainerRunner) logAPIResponse(label, path string, params map[string]interface{}, munge func(interface{})) (logged bool, err error) {
 838         writer, err := runner.LogCollection.OpenFile(label+".json", os.O_CREATE|os.O_WRONLY, 0666)
 839         if err != nil {
 840                 return false, err
 841         }
 842         w := &ArvLogWriter{
 843                 ArvClient:     runner.ArvClient,
 844                 UUID:          runner.Container.UUID,
 845                 loggingStream: label,
 846                 writeCloser:   writer,
 847         }
 848
 849         reader, err := runner.ArvClient.CallRaw("GET", path, "", "", arvadosclient.Dict(params))
 850         if err != nil {
 851                 return false, fmt.Errorf("error getting %s record: %v", label, err)
 852         }
 853         defer reader.Close()
 854
 855         dec := json.NewDecoder(reader)
 856         dec.UseNumber()
 857         var resp map[string]interface{}
 858         if err = dec.Decode(&resp); err != nil {
 859                 return false, fmt.Errorf("error decoding %s list response: %v", label, err)
 860         }
 861         items, ok := resp["items"].([]interface{})
 862         if !ok {
 863                 return false, fmt.Errorf("error decoding %s list response: no \"items\" key in API list response", label)
 864         } else if len(items) < 1 {
 865                 return false, nil
 866         }
 867         if munge != nil {
 868                 munge(items[0])
 869         }
 870         // Re-encode it using indentation to improve readability
 871         enc := json.NewEncoder(w)
 872         enc.SetIndent("", "    ")
 873         if err = enc.Encode(items[0]); err != nil {
 874                 return false, fmt.Errorf("error logging %s record: %v", label, err)
 875         }
 876         err = w.Close()
 877         if err != nil {
 878                 return false, fmt.Errorf("error closing %s.json in log collection: %v", label, err)
 879         }
 880         return true, nil
 881 }
 882
 883 // AttachStreams connects the docker container stdin, stdout and stderr logs
 884 // to the Arvados logger which logs to Keep and the API server logs table.
 885 func (runner *ContainerRunner) AttachStreams() (err error) {
 886
 887         runner.CrunchLog.Print("Attaching container streams")
 888
 889         // If stdin mount is provided, attach it to the docker container
 890         var stdinRdr arvados.File
 891         var stdinJson []byte
 892         if stdinMnt, ok := runner.Container.Mounts["stdin"]; ok {
 893                 if stdinMnt.Kind == "collection" {
 894                         var stdinColl arvados.Collection
 895                         collId := stdinMnt.UUID
 896                         if collId == "" {
 897                                 collId = stdinMnt.PortableDataHash
 898                         }
 899                         err = runner.ArvClient.Get("collections", collId, nil, &stdinColl)
 900                         if err != nil {
 901                                 return fmt.Errorf("While getting stding collection: %v", err)
 902                         }
 903
 904                         stdinRdr, err = runner.Kc.ManifestFileReader(manifest.Manifest{Text: stdinColl.ManifestText}, stdinMnt.Path)
 905                         if os.IsNotExist(err) {
 906                                 return fmt.Errorf("stdin collection path not found: %v", stdinMnt.Path)
 907                         } else if err != nil {
 908                                 return fmt.Errorf("While getting stdin collection path %v: %v", stdinMnt.Path, err)
 909                         }
 910                 } else if stdinMnt.Kind == "json" {
 911                         stdinJson, err = json.Marshal(stdinMnt.Content)
 912                         if err != nil {
 913                                 return fmt.Errorf("While encoding stdin json data: %v", err)
 914                         }
 915                 }
 916         }
 917
 918         stdinUsed := stdinRdr != nil || len(stdinJson) != 0
 919         response, err := runner.Docker.ContainerAttach(context.TODO(), runner.ContainerID,
 920                 dockertypes.ContainerAttachOptions{Stream: true, Stdin: stdinUsed, Stdout: true, Stderr: true})
 921         if err != nil {
 922                 return fmt.Errorf("While attaching container stdout/stderr streams: %v", err)
 923         }
 924
 925         runner.loggingDone = make(chan bool)
 926
 927         if stdoutMnt, ok := runner.Container.Mounts["stdout"]; ok {
 928                 stdoutFile, err := runner.getStdoutFile(stdoutMnt.Path)
 929                 if err != nil {
 930                         return err
 931                 }
 932                 runner.Stdout = stdoutFile
 933         } else if w, err := runner.NewLogWriter("stdout"); err != nil {
 934                 return err
 935         } else {
 936                 runner.Stdout = NewThrottledLogger(w)
 937         }
 938
 939         if stderrMnt, ok := runner.Container.Mounts["stderr"]; ok {
 940                 stderrFile, err := runner.getStdoutFile(stderrMnt.Path)
 941                 if err != nil {
 942                         return err
 943                 }
 944                 runner.Stderr = stderrFile
 945         } else if w, err := runner.NewLogWriter("stderr"); err != nil {
 946                 return err
 947         } else {
 948                 runner.Stderr = NewThrottledLogger(w)
 949         }
 950
 951         if stdinRdr != nil {
 952                 go func() {
 953                         _, err := io.Copy(response.Conn, stdinRdr)
 954                         if err != nil {
 955                                 runner.CrunchLog.Print("While writing stdin collection to docker container %q", err)
 956                                 runner.stop(nil)
 957                         }
 958                         stdinRdr.Close()
 959                         response.CloseWrite()
 960                 }()
 961         } else if len(stdinJson) != 0 {
 962                 go func() {
 963                         _, err := io.Copy(response.Conn, bytes.NewReader(stdinJson))
 964                         if err != nil {
 965                                 runner.CrunchLog.Print("While writing stdin json to docker container %q", err)
 966                                 runner.stop(nil)
 967                         }
 968                         response.CloseWrite()
 969                 }()
 970         }
 971
 972         go runner.ProcessDockerAttach(response.Reader)
 973
 974         return nil
 975 }
 976
 977 func (runner *ContainerRunner) getStdoutFile(mntPath string) (*os.File, error) {
 978         stdoutPath := mntPath[len(runner.Container.OutputPath):]
 979         index := strings.LastIndex(stdoutPath, "/")
 980         if index > 0 {
 981                 subdirs := stdoutPath[:index]
 982                 if subdirs != "" {
 983                         st, err := os.Stat(runner.HostOutputDir)
 984                         if err != nil {
 985                                 return nil, fmt.Errorf("While Stat on temp dir: %v", err)
 986                         }
 987                         stdoutPath := filepath.Join(runner.HostOutputDir, subdirs)
 988                         err = os.MkdirAll(stdoutPath, st.Mode()|os.ModeSetgid|0777)
 989                         if err != nil {
 990                                 return nil, fmt.Errorf("While MkdirAll %q: %v", stdoutPath, err)
 991                         }
 992                 }
 993         }
 994         stdoutFile, err := os.Create(filepath.Join(runner.HostOutputDir, stdoutPath))
 995         if err != nil {
 996                 return nil, fmt.Errorf("While creating file %q: %v", stdoutPath, err)
 997         }
 998
 999         return stdoutFile, nil
1000 }
1001
1002 // CreateContainer creates the docker container.
1003 func (runner *ContainerRunner) CreateContainer() error {
1004         runner.CrunchLog.Print("Creating Docker container")
1005
1006         runner.ContainerConfig.Cmd = runner.Container.Command
1007         if runner.Container.Cwd != "." {
1008                 runner.ContainerConfig.WorkingDir = runner.Container.Cwd
1009         }
1010
1011         for k, v := range runner.Container.Environment {
1012                 runner.ContainerConfig.Env = append(runner.ContainerConfig.Env, k+"="+v)
1013         }
1014
1015         runner.ContainerConfig.Volumes = runner.Volumes
1016
1017         maxRAM := int64(runner.Container.RuntimeConstraints.RAM)
1018         if maxRAM < 4*1024*1024 {
1019                 // Docker daemon won't let you set a limit less than 4 MiB
1020                 maxRAM = 4 * 1024 * 1024
1021         }
1022         runner.HostConfig = dockercontainer.HostConfig{
1023                 Binds: runner.Binds,
1024                 LogConfig: dockercontainer.LogConfig{
1025                         Type: "none",
1026                 },
1027                 Resources: dockercontainer.Resources{
1028                         CgroupParent: runner.setCgroupParent,
1029                         NanoCPUs:     int64(runner.Container.RuntimeConstraints.VCPUs) * 1000000000,
1030                         Memory:       maxRAM, // RAM
1031                         MemorySwap:   maxRAM, // RAM+swap
1032                         KernelMemory: maxRAM, // kernel portion
1033                 },
1034         }
1035
1036         if wantAPI := runner.Container.RuntimeConstraints.API; wantAPI != nil && *wantAPI {
1037                 tok, err := runner.ContainerToken()
1038                 if err != nil {
1039                         return err
1040                 }
1041                 runner.ContainerConfig.Env = append(runner.ContainerConfig.Env,
1042                         "ARVADOS_API_TOKEN="+tok,
1043                         "ARVADOS_API_HOST="+os.Getenv("ARVADOS_API_HOST"),
1044                         "ARVADOS_API_HOST_INSECURE="+os.Getenv("ARVADOS_API_HOST_INSECURE"),
1045                 )
1046                 runner.HostConfig.NetworkMode = dockercontainer.NetworkMode(runner.networkMode)
1047         } else {
1048                 if runner.enableNetwork == "always" {
1049                         runner.HostConfig.NetworkMode = dockercontainer.NetworkMode(runner.networkMode)
1050                 } else {
1051                         runner.HostConfig.NetworkMode = dockercontainer.NetworkMode("none")
1052                 }
1053         }
1054
1055         _, stdinUsed := runner.Container.Mounts["stdin"]
1056         runner.ContainerConfig.OpenStdin = stdinUsed
1057         runner.ContainerConfig.StdinOnce = stdinUsed
1058         runner.ContainerConfig.AttachStdin = stdinUsed
1059         runner.ContainerConfig.AttachStdout = true
1060         runner.ContainerConfig.AttachStderr = true
1061
1062         createdBody, err := runner.Docker.ContainerCreate(context.TODO(), &runner.ContainerConfig, &runner.HostConfig, nil, runner.Container.UUID)
1063         if err != nil {
1064                 return fmt.Errorf("While creating container: %v", err)
1065         }
1066
1067         runner.ContainerID = createdBody.ID
1068
1069         return runner.AttachStreams()
1070 }
1071
1072 // StartContainer starts the docker container created by CreateContainer.
1073 func (runner *ContainerRunner) StartContainer() error {
1074         runner.CrunchLog.Printf("Starting Docker container id '%s'", runner.ContainerID)
1075         runner.cStateLock.Lock()
1076         defer runner.cStateLock.Unlock()
1077         if runner.cCancelled {
1078                 return ErrCancelled
1079         }
1080         err := runner.Docker.ContainerStart(context.TODO(), runner.ContainerID,
1081                 dockertypes.ContainerStartOptions{})
1082         if err != nil {
1083                 var advice string
1084                 if m, e := regexp.MatchString("(?ms).*(exec|System error).*(no such file or directory|file not found).*", err.Error()); m && e == nil {
1085                         advice = fmt.Sprintf("\nPossible causes: command %q is missing, the interpreter given in #! is missing, or script has Windows line endings.", runner.Container.Command[0])
1086                 }
1087                 return fmt.Errorf("could not start container: %v%s", err, advice)
1088         }
1089         return nil
1090 }
1091
1092 // checkContainerd checks if "containerd" is present in the process list.
1093 func (runner *ContainerRunner) CheckContainerd() error {
1094         if runner.checkContainerd == 0 {
1095                 return nil
1096         }
1097         p, _ := runner.ListProcesses()
1098         for _, i := range p {
1099                 e, _ := i.CmdlineSlice()
1100                 if len(e) > 0 {
1101                         if strings.Index(e[0], "containerd") > -1 {
1102                                 return nil
1103                         }
1104                 }
1105         }
1106
1107         // Not found
1108         runner.runBrokenNodeHook()
1109         runner.stop(nil)
1110         return fmt.Errorf("'containerd' not found in process list.")
1111 }
1112
1113 // WaitFinish waits for the container to terminate, capture the exit code, and
1114 // close the stdout/stderr logging.
1115 func (runner *ContainerRunner) WaitFinish() error {
1116         var runTimeExceeded <-chan time.Time
1117         runner.CrunchLog.Print("Waiting for container to finish")
1118
1119         waitOk, waitErr := runner.Docker.ContainerWait(context.TODO(), runner.ContainerID, dockercontainer.WaitConditionNotRunning)
1120         arvMountExit := runner.ArvMountExit
1121         if timeout := runner.Container.SchedulingParameters.MaxRunTime; timeout > 0 {
1122                 runTimeExceeded = time.After(time.Duration(timeout) * time.Second)
1123         }
1124
1125         containerdGone := make(chan error)
1126         defer close(containerdGone)
1127         if runner.checkContainerd > 0 {
1128                 go func() {
1129                         ticker := time.NewTicker(time.Duration(runner.checkContainerd))
1130                         defer ticker.Stop()
1131                         for {
1132                                 select {
1133                                 case <-ticker.C:
1134                                         if ck := runner.CheckContainerd(); ck != nil {
1135                                                 containerdGone <- ck
1136                                                 return
1137                                         }
1138                                 case <-containerdGone:
1139                                         // Channel closed, quit goroutine
1140                                         return
1141                                 }
1142                         }
1143                 }()
1144         }
1145
1146         for {
1147                 select {
1148                 case waitBody := <-waitOk:
1149                         runner.CrunchLog.Printf("Container exited with code: %v", waitBody.StatusCode)
1150                         code := int(waitBody.StatusCode)
1151                         runner.ExitCode = &code
1152
1153                         // wait for stdout/stderr to complete
1154                         <-runner.loggingDone
1155                         return nil
1156
1157                 case err := <-waitErr:
1158                         return fmt.Errorf("container wait: %v", err)
1159
1160                 case <-arvMountExit:
1161                         runner.CrunchLog.Printf("arv-mount exited while container is still running.  Stopping container.")
1162                         runner.stop(nil)
1163                         // arvMountExit will always be ready now that
1164                         // it's closed, but that doesn't interest us.
1165                         arvMountExit = nil
1166
1167                 case <-runTimeExceeded:
1168                         runner.CrunchLog.Printf("maximum run time exceeded. Stopping container.")
1169                         runner.stop(nil)
1170                         runTimeExceeded = nil
1171
1172                 case err := <-containerdGone:
1173                         return err
1174                 }
1175         }
1176 }
1177
1178 // CaptureOutput saves data from the container's output directory if
1179 // needed, and updates the container output accordingly.
1180 func (runner *ContainerRunner) CaptureOutput() error {
1181         if wantAPI := runner.Container.RuntimeConstraints.API; wantAPI != nil && *wantAPI {
1182                 // Output may have been set directly by the container, so
1183                 // refresh the container record to check.
1184                 err := runner.ArvClient.Get("containers", runner.Container.UUID,
1185                         nil, &runner.Container)
1186                 if err != nil {
1187                         return err
1188                 }
1189                 if runner.Container.Output != "" {
1190                         // Container output is already set.
1191                         runner.OutputPDH = &runner.Container.Output
1192                         return nil
1193                 }
1194         }
1195
1196         txt, err := (&copier{
1197                 client:        runner.client,
1198                 arvClient:     runner.ArvClient,
1199                 keepClient:    runner.Kc,
1200                 hostOutputDir: runner.HostOutputDir,
1201                 ctrOutputDir:  runner.Container.OutputPath,
1202                 binds:         runner.Binds,
1203                 mounts:        runner.Container.Mounts,
1204                 secretMounts:  runner.SecretMounts,
1205                 logger:        runner.CrunchLog,
1206         }).Copy()
1207         if err != nil {
1208                 return err
1209         }
1210         var resp arvados.Collection
1211         err = runner.ArvClient.Create("collections", arvadosclient.Dict{
1212                 "ensure_unique_name": true,
1213                 "collection": arvadosclient.Dict{
1214                         "is_trashed":    true,
1215                         "name":          "output for " + runner.Container.UUID,
1216                         "manifest_text": txt,
1217                 },
1218         }, &resp)
1219         if err != nil {
1220                 return fmt.Errorf("error creating output collection: %v", err)
1221         }
1222         runner.OutputPDH = &resp.PortableDataHash
1223         return nil
1224 }
1225
1226 func (runner *ContainerRunner) CleanupDirs() {
1227         if runner.ArvMount != nil {
1228                 var delay int64 = 8
1229                 umount := exec.Command("arv-mount", fmt.Sprintf("--unmount-timeout=%d", delay), "--unmount", runner.ArvMountPoint)
1230                 umount.Stdout = runner.CrunchLog
1231                 umount.Stderr = runner.CrunchLog
1232                 runner.CrunchLog.Printf("Running %v", umount.Args)
1233                 umnterr := umount.Start()
1234
1235                 if umnterr != nil {
1236                         runner.CrunchLog.Printf("Error unmounting: %v", umnterr)
1237                 } else {
1238                         // If arv-mount --unmount gets stuck for any reason, we
1239                         // don't want to wait for it forever.  Do Wait() in a goroutine
1240                         // so it doesn't block crunch-run.
1241                         umountExit := make(chan error)
1242                         go func() {
1243                                 mnterr := umount.Wait()
1244                                 if mnterr != nil {
1245                                         runner.CrunchLog.Printf("Error unmounting: %v", mnterr)
1246                                 }
1247                                 umountExit <- mnterr
1248                         }()
1249
1250                         for again := true; again; {
1251                                 again = false
1252                                 select {
1253                                 case <-umountExit:
1254                                         umount = nil
1255                                         again = true
1256                                 case <-runner.ArvMountExit:
1257                                         break
1258                                 case <-time.After(time.Duration((delay + 1) * int64(time.Second))):
1259                                         runner.CrunchLog.Printf("Timed out waiting for unmount")
1260                                         if umount != nil {
1261                                                 umount.Process.Kill()
1262                                         }
1263                                         runner.ArvMount.Process.Kill()
1264                                 }
1265                         }
1266                 }
1267         }
1268
1269         if runner.ArvMountPoint != "" {
1270                 if rmerr := os.Remove(runner.ArvMountPoint); rmerr != nil {
1271                         runner.CrunchLog.Printf("While cleaning up arv-mount directory %s: %v", runner.ArvMountPoint, rmerr)
1272                 }
1273         }
1274
1275         if rmerr := os.RemoveAll(runner.parentTemp); rmerr != nil {
1276                 runner.CrunchLog.Printf("While cleaning up temporary directory %s: %v", runner.parentTemp, rmerr)
1277         }
1278 }
1279
1280 // CommitLogs posts the collection containing the final container logs.
1281 func (runner *ContainerRunner) CommitLogs() error {
1282         func() {
1283                 // Hold cStateLock to prevent races on CrunchLog (e.g., stop()).
1284                 runner.cStateLock.Lock()
1285                 defer runner.cStateLock.Unlock()
1286
1287                 runner.CrunchLog.Print(runner.finalState)
1288
1289                 if runner.arvMountLog != nil {
1290                         runner.arvMountLog.Close()
1291                 }
1292                 runner.CrunchLog.Close()
1293
1294                 // Closing CrunchLog above allows them to be committed to Keep at this
1295                 // point, but re-open crunch log with ArvClient in case there are any
1296                 // other further errors (such as failing to write the log to Keep!)
1297                 // while shutting down
1298                 runner.CrunchLog = NewThrottledLogger(&ArvLogWriter{
1299                         ArvClient:     runner.ArvClient,
1300                         UUID:          runner.Container.UUID,
1301                         loggingStream: "crunch-run",
1302                         writeCloser:   nil,
1303                 })
1304                 runner.CrunchLog.Immediate = log.New(os.Stderr, runner.Container.UUID+" ", 0)
1305         }()
1306
1307         if runner.LogsPDH != nil {
1308                 // If we have already assigned something to LogsPDH,
1309                 // we must be closing the re-opened log, which won't
1310                 // end up getting attached to the container record and
1311                 // therefore doesn't need to be saved as a collection
1312                 // -- it exists only to send logs to other channels.
1313                 return nil
1314         }
1315
1316         mt, err := runner.LogCollection.MarshalManifest(".")
1317         if err != nil {
1318                 return fmt.Errorf("While creating log manifest: %v", err)
1319         }
1320
1321         var response arvados.Collection
1322         err = runner.ArvClient.Create("collections",
1323                 arvadosclient.Dict{
1324                         "ensure_unique_name": true,
1325                         "collection": arvadosclient.Dict{
1326                                 "is_trashed":    true,
1327                                 "name":          "logs for " + runner.Container.UUID,
1328                                 "manifest_text": mt}},
1329                 &response)
1330         if err != nil {
1331                 return fmt.Errorf("While creating log collection: %v", err)
1332         }
1333         runner.LogsPDH = &response.PortableDataHash
1334         return nil
1335 }
1336
1337 // UpdateContainerRunning updates the container state to "Running"
1338 func (runner *ContainerRunner) UpdateContainerRunning() error {
1339         runner.cStateLock.Lock()
1340         defer runner.cStateLock.Unlock()
1341         if runner.cCancelled {
1342                 return ErrCancelled
1343         }
1344         return runner.ArvClient.Update("containers", runner.Container.UUID,
1345                 arvadosclient.Dict{"container": arvadosclient.Dict{"state": "Running"}}, nil)
1346 }
1347
1348 // ContainerToken returns the api_token the container (and any
1349 // arv-mount processes) are allowed to use.
1350 func (runner *ContainerRunner) ContainerToken() (string, error) {
1351         if runner.token != "" {
1352                 return runner.token, nil
1353         }
1354
1355         var auth arvados.APIClientAuthorization
1356         err := runner.ArvClient.Call("GET", "containers", runner.Container.UUID, "auth", nil, &auth)
1357         if err != nil {
1358                 return "", err
1359         }
1360         runner.token = auth.APIToken
1361         return runner.token, nil
1362 }
1363
1364 // UpdateContainerComplete updates the container record state on API
1365 // server to "Complete" or "Cancelled"
1366 func (runner *ContainerRunner) UpdateContainerFinal() error {
1367         update := arvadosclient.Dict{}
1368         update["state"] = runner.finalState
1369         if runner.LogsPDH != nil {
1370                 update["log"] = *runner.LogsPDH
1371         }
1372         if runner.finalState == "Complete" {
1373                 if runner.ExitCode != nil {
1374                         update["exit_code"] = *runner.ExitCode
1375                 }
1376                 if runner.OutputPDH != nil {
1377                         update["output"] = *runner.OutputPDH
1378                 }
1379         }
1380         return runner.ArvClient.Update("containers", runner.Container.UUID, arvadosclient.Dict{"container": update}, nil)
1381 }
1382
1383 // IsCancelled returns the value of Cancelled, with goroutine safety.
1384 func (runner *ContainerRunner) IsCancelled() bool {
1385         runner.cStateLock.Lock()
1386         defer runner.cStateLock.Unlock()
1387         return runner.cCancelled
1388 }
1389
1390 // NewArvLogWriter creates an ArvLogWriter
1391 func (runner *ContainerRunner) NewArvLogWriter(name string) (io.WriteCloser, error) {
1392         writer, err := runner.LogCollection.OpenFile(name+".txt", os.O_CREATE|os.O_WRONLY, 0666)
1393         if err != nil {
1394                 return nil, err
1395         }
1396         return &ArvLogWriter{
1397                 ArvClient:     runner.ArvClient,
1398                 UUID:          runner.Container.UUID,
1399                 loggingStream: name,
1400                 writeCloser:   writer,
1401         }, nil
1402 }
1403
1404 // Run the full container lifecycle.
1405 func (runner *ContainerRunner) Run() (err error) {
1406         runner.CrunchLog.Printf("crunch-run %s started", version)
1407         runner.CrunchLog.Printf("Executing container '%s'", runner.Container.UUID)
1408
1409         hostname, hosterr := os.Hostname()
1410         if hosterr != nil {
1411                 runner.CrunchLog.Printf("Error getting hostname '%v'", hosterr)
1412         } else {
1413                 runner.CrunchLog.Printf("Executing on host '%s'", hostname)
1414         }
1415
1416         runner.finalState = "Queued"
1417
1418         defer func() {
1419                 runner.CleanupDirs()
1420
1421                 runner.CrunchLog.Printf("crunch-run finished")
1422                 runner.CrunchLog.Close()
1423         }()
1424
1425         defer func() {
1426                 // checkErr prints e (unless it's nil) and sets err to
1427                 // e (unless err is already non-nil). Thus, if err
1428                 // hasn't already been assigned when Run() returns,
1429                 // this cleanup func will cause Run() to return the
1430                 // first non-nil error that is passed to checkErr().
1431                 checkErr := func(errorIn string, e error) {
1432                         if e == nil {
1433                                 return
1434                         }
1435                         runner.CrunchLog.Printf("error in %s: %v", errorIn, e)
1436                         if err == nil {
1437                                 err = e
1438                         }
1439                         if runner.finalState == "Complete" {
1440                                 // There was an error in the finalization.
1441                                 runner.finalState = "Cancelled"
1442                         }
1443                 }
1444
1445                 // Log the error encountered in Run(), if any
1446                 checkErr("Run", err)
1447
1448                 if runner.finalState == "Queued" {
1449                         runner.UpdateContainerFinal()
1450                         return
1451                 }
1452
1453                 if runner.IsCancelled() {
1454                         runner.finalState = "Cancelled"
1455                         // but don't return yet -- we still want to
1456                         // capture partial output and write logs
1457                 }
1458
1459                 checkErr("CaptureOutput", runner.CaptureOutput())
1460                 checkErr("stopHoststat", runner.stopHoststat())
1461                 checkErr("CommitLogs", runner.CommitLogs())
1462                 checkErr("UpdateContainerFinal", runner.UpdateContainerFinal())
1463         }()
1464
1465         err = runner.fetchContainerRecord()
1466         if err != nil {
1467                 return
1468         }
1469         runner.setupSignals()
1470         err = runner.startHoststat()
1471         if err != nil {
1472                 return
1473         }
1474
1475         // Sanity check that containerd is running.
1476         err = runner.CheckContainerd()
1477         if err != nil {
1478                 return
1479         }
1480
1481         // check for and/or load image
1482         err = runner.LoadImage()
1483         if err != nil {
1484                 if !runner.checkBrokenNode(err) {
1485                         // Failed to load image but not due to a "broken node"
1486                         // condition, probably user error.
1487                         runner.finalState = "Cancelled"
1488                 }
1489                 err = fmt.Errorf("While loading container image: %v", err)
1490                 return
1491         }
1492
1493         // set up FUSE mount and binds
1494         err = runner.SetupMounts()
1495         if err != nil {
1496                 runner.finalState = "Cancelled"
1497                 err = fmt.Errorf("While setting up mounts: %v", err)
1498                 return
1499         }
1500
1501         err = runner.CreateContainer()
1502         if err != nil {
1503                 return
1504         }
1505         err = runner.LogHostInfo()
1506         if err != nil {
1507                 return
1508         }
1509         err = runner.LogNodeRecord()
1510         if err != nil {
1511                 return
1512         }
1513         err = runner.LogContainerRecord()
1514         if err != nil {
1515                 return
1516         }
1517
1518         if runner.IsCancelled() {
1519                 return
1520         }
1521
1522         err = runner.UpdateContainerRunning()
1523         if err != nil {
1524                 return
1525         }
1526         runner.finalState = "Cancelled"
1527
1528         err = runner.startCrunchstat()
1529         if err != nil {
1530                 return
1531         }
1532
1533         err = runner.StartContainer()
1534         if err != nil {
1535                 runner.checkBrokenNode(err)
1536                 return
1537         }
1538
1539         err = runner.WaitFinish()
1540         if err == nil && !runner.IsCancelled() {
1541                 runner.finalState = "Complete"
1542         }
1543         return
1544 }
1545
1546 // Fetch the current container record (uuid = runner.Container.UUID)
1547 // into runner.Container.
1548 func (runner *ContainerRunner) fetchContainerRecord() error {
1549         reader, err := runner.ArvClient.CallRaw("GET", "containers", runner.Container.UUID, "", nil)
1550         if err != nil {
1551                 return fmt.Errorf("error fetching container record: %v", err)
1552         }
1553         defer reader.Close()
1554
1555         dec := json.NewDecoder(reader)
1556         dec.UseNumber()
1557         err = dec.Decode(&runner.Container)
1558         if err != nil {
1559                 return fmt.Errorf("error decoding container record: %v", err)
1560         }
1561
1562         var sm struct {
1563                 SecretMounts map[string]arvados.Mount `json:"secret_mounts"`
1564         }
1565
1566         containerToken, err := runner.ContainerToken()
1567         if err != nil {
1568                 return fmt.Errorf("error getting container token: %v", err)
1569         }
1570
1571         containerClient, err := runner.MkArvClient(containerToken)
1572         if err != nil {
1573                 return fmt.Errorf("error creating container API client: %v", err)
1574         }
1575
1576         err = containerClient.Call("GET", "containers", runner.Container.UUID, "secret_mounts", nil, &sm)
1577         if err != nil {
1578                 if apierr, ok := err.(arvadosclient.APIServerError); !ok || apierr.HttpStatusCode != 404 {
1579                         return fmt.Errorf("error fetching secret_mounts: %v", err)
1580                 }
1581                 // ok && apierr.HttpStatusCode == 404, which means
1582                 // secret_mounts isn't supported by this API server.
1583         }
1584         runner.SecretMounts = sm.SecretMounts
1585
1586         return nil
1587 }
1588
1589 // NewContainerRunner creates a new container runner.
1590 func NewContainerRunner(client *arvados.Client, api IArvadosClient, kc IKeepClient, docker ThinDockerClient, containerUUID string) (*ContainerRunner, error) {
1591         cr := &ContainerRunner{
1592                 client:    client,
1593                 ArvClient: api,
1594                 Kc:        kc,
1595                 Docker:    docker,
1596         }
1597         cr.NewLogWriter = cr.NewArvLogWriter
1598         cr.RunArvMount = cr.ArvMountCmd
1599         cr.MkTempDir = ioutil.TempDir
1600         cr.ListProcesses = func() ([]PsProcess, error) {
1601                 pr, err := process.Processes()
1602                 if err != nil {
1603                         return nil, err
1604                 }
1605                 ps := make([]PsProcess, len(pr))
1606                 for i, j := range pr {
1607                         ps[i] = j
1608                 }
1609                 return ps, nil
1610         }
1611         cr.MkArvClient = func(token string) (IArvadosClient, error) {
1612                 cl, err := arvadosclient.MakeArvadosClient()
1613                 if err != nil {
1614                         return nil, err
1615                 }
1616                 cl.ApiToken = token
1617                 return cl, nil
1618         }
1619         var err error
1620         cr.LogCollection, err = (&arvados.Collection{}).FileSystem(cr.client, cr.Kc)
1621         if err != nil {
1622                 return nil, err
1623         }
1624         cr.Container.UUID = containerUUID
1625         w, err := cr.NewLogWriter("crunch-run")
1626         if err != nil {
1627                 return nil, err
1628         }
1629         cr.CrunchLog = NewThrottledLogger(w)
1630         cr.CrunchLog.Immediate = log.New(os.Stderr, containerUUID+" ", 0)
1631
1632         loadLogThrottleParams(api)
1633
1634         return cr, nil
1635 }
1636
1637 func main() {
1638         statInterval := flag.Duration("crunchstat-interval", 10*time.Second, "sampling period for periodic resource usage reporting")
1639         cgroupRoot := flag.String("cgroup-root", "/sys/fs/cgroup", "path to sysfs cgroup tree")
1640         cgroupParent := flag.String("cgroup-parent", "docker", "name of container's parent cgroup (ignored if -cgroup-parent-subsystem is used)")
1641         cgroupParentSubsystem := flag.String("cgroup-parent-subsystem", "", "use current cgroup for given subsystem as parent cgroup for container")
1642         caCertsPath := flag.String("ca-certs", "", "Path to TLS root certificates")
1643         enableNetwork := flag.String("container-enable-networking", "default",
1644                 `Specify if networking should be enabled for container.  One of 'default', 'always':
1645         default: only enable networking if container requests it.
1646         always:  containers always have networking enabled
1647         `)
1648         networkMode := flag.String("container-network-mode", "default",
1649                 `Set networking mode for container.  Corresponds to Docker network mode (--net).
1650         `)
1651         memprofile := flag.String("memprofile", "", "write memory profile to `file` after running container")
1652         getVersion := flag.Bool("version", false, "Print version information and exit.")
1653         checkContainerd := flag.Duration("check-containerd", 60*time.Second, "Periodic check if (docker-)containerd is running (use 0s to disable).")
1654         flag.Parse()
1655
1656         // Print version information if requested
1657         if *getVersion {
1658                 fmt.Printf("crunch-run %s\n", version)
1659                 return
1660         }
1661
1662         log.Printf("crunch-run %s started", version)
1663
1664         containerId := flag.Arg(0)
1665
1666         if *caCertsPath != "" {
1667                 arvadosclient.CertFiles = []string{*caCertsPath}
1668         }
1669
1670         api, err := arvadosclient.MakeArvadosClient()
1671         if err != nil {
1672                 log.Fatalf("%s: %v", containerId, err)
1673         }
1674         api.Retries = 8
1675
1676         kc, kcerr := keepclient.MakeKeepClient(api)
1677         if kcerr != nil {
1678                 log.Fatalf("%s: %v", containerId, kcerr)
1679         }
1680         kc.BlockCache = &keepclient.BlockCache{MaxBlocks: 2}
1681         kc.Retries = 4
1682
1683         // API version 1.21 corresponds to Docker 1.9, which is currently the
1684         // minimum version we want to support.
1685         docker, dockererr := dockerclient.NewClient(dockerclient.DefaultDockerHost, "1.21", nil, nil)
1686
1687         cr, err := NewContainerRunner(arvados.NewClientFromEnv(), api, kc, docker, containerId)
1688         if err != nil {
1689                 log.Fatal(err)
1690         }
1691         if dockererr != nil {
1692                 cr.CrunchLog.Printf("%s: %v", containerId, dockererr)
1693                 cr.checkBrokenNode(dockererr)
1694                 cr.CrunchLog.Close()
1695                 os.Exit(1)
1696         }
1697
1698         parentTemp, tmperr := cr.MkTempDir("", "crunch-run."+containerId+".")
1699         if tmperr != nil {
1700                 log.Fatalf("%s: %v", containerId, tmperr)
1701         }
1702
1703         cr.parentTemp = parentTemp
1704         cr.statInterval = *statInterval
1705         cr.cgroupRoot = *cgroupRoot
1706         cr.expectCgroupParent = *cgroupParent
1707         cr.enableNetwork = *enableNetwork
1708         cr.networkMode = *networkMode
1709         cr.checkContainerd = *checkContainerd
1710         if *cgroupParentSubsystem != "" {
1711                 p := findCgroup(*cgroupParentSubsystem)
1712                 cr.setCgroupParent = p
1713                 cr.expectCgroupParent = p
1714         }
1715
1716         runerr := cr.Run()
1717
1718         if *memprofile != "" {
1719                 f, err := os.Create(*memprofile)
1720                 if err != nil {
1721                         log.Printf("could not create memory profile: %s", err)
1722                 }
1723                 runtime.GC() // get up-to-date statistics
1724                 if err := pprof.WriteHeapProfile(f); err != nil {
1725                         log.Printf("could not write memory profile: %s", err)
1726                 }
1727                 closeerr := f.Close()
1728                 if closeerr != nil {
1729                         log.Printf("closing memprofile file: %s", err)
1730                 }
1731         }
1732
1733         if runerr != nil {
1734                 log.Fatalf("%s: %v", containerId, runerr)
1735         }
1736 }