X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/b47e664b17efbedd41b868d05164272d5549ffc1..f9e3d32c92920a806d50548dbb9b6c0aab7d8c54:/services/crunch-run/crunchrun.go?ds=sidebyside diff --git a/services/crunch-run/crunchrun.go b/services/crunch-run/crunchrun.go index a7d8a58b2e..2fd002907c 100644 --- a/services/crunch-run/crunchrun.go +++ b/services/crunch-run/crunchrun.go @@ -1,21 +1,26 @@ package main import ( + "encoding/json" "errors" "flag" + "fmt" + "git.curoverse.com/arvados.git/sdk/go/arvados" "git.curoverse.com/arvados.git/sdk/go/arvadosclient" "git.curoverse.com/arvados.git/sdk/go/keepclient" "git.curoverse.com/arvados.git/sdk/go/manifest" "github.com/curoverse/dockerclient" "io" - "ioutil" + "io/ioutil" "log" "os" "os/exec" "os/signal" + "path" "strings" "sync" "syscall" + "time" ) // IArvadosClient is the minimal Arvados API methods used by crunch-run. @@ -23,6 +28,7 @@ type IArvadosClient interface { Create(resourceType string, parameters arvadosclient.Dict, output interface{}) error Get(resourceType string, uuid string, parameters arvadosclient.Dict, output interface{}) error Update(resourceType string, uuid string, parameters arvadosclient.Dict, output interface{}) (err error) + Call(method, resourceType, uuid, action string, parameters arvadosclient.Dict, output interface{}) (err error) } // ErrCancelled is the error returned when the container is cancelled. @@ -34,39 +40,13 @@ type IKeepClient interface { ManifestFileReader(m manifest.Manifest, filename string) (keepclient.ReadCloserWithLen, error) } -// Mount describes the mount points to create inside the container. -type Mount struct { - Kind string `json:"kind"` - Writable bool `json:"writable"` - PortableDataHash string `json:"portable_data_hash"` - UUID string `json:"uuid"` - DeviceType string `json:"device_type"` -} - -// Collection record returned by the API server. -type CollectionRecord struct { - ManifestText string `json:"manifest_text"` - PortableDataHash string `json:"portable_data_hash"` -} - -// ContainerRecord is the container record returned by the API server. -type ContainerRecord struct { - UUID string `json:"uuid"` - Command []string `json:"command"` - ContainerImage string `json:"container_image"` - Cwd string `json:"cwd"` - Environment map[string]string `json:"environment"` - Mounts map[string]Mount `json:"mounts"` - OutputPath string `json:"output_path"` - Priority int `json:"priority"` - RuntimeConstraints map[string]interface{} `json:"runtime_constraints"` - State string `json:"state"` - Output string `json:"output"` -} - // NewLogWriter is a factory function to create a new log writer. type NewLogWriter func(name string) io.WriteCloser +type RunArvMount func(args []string, tok string) (*exec.Cmd, error) + +type MkTempDir func(string, string) (string, error) + // ThinDockerClient is the minimal Docker client interface used by crunch-run. type ThinDockerClient interface { StopContainer(id string, timeout int) error @@ -74,7 +54,7 @@ type ThinDockerClient interface { LoadImage(reader io.Reader) error CreateContainer(config *dockerclient.ContainerConfig, name string, authConfig *dockerclient.AuthConfig) (string, error) StartContainer(id string, config *dockerclient.HostConfig) error - ContainerLogs(id string, options *dockerclient.LogOptions) (io.ReadCloser, error) + AttachContainer(id string, options *dockerclient.AttachOptions) (io.ReadCloser, error) Wait(id string) <-chan dockerclient.WaitResult RemoveImage(name string, force bool) ([]*dockerclient.ImageDelete, error) } @@ -85,37 +65,44 @@ type ContainerRunner struct { Docker ThinDockerClient ArvClient IArvadosClient Kc IKeepClient - ContainerRecord + arvados.Container dockerclient.ContainerConfig + dockerclient.HostConfig + token string ContainerID string ExitCode *int NewLogWriter loggingDone chan bool CrunchLog *ThrottledLogger - Stdout *ThrottledLogger + Stdout io.WriteCloser Stderr *ThrottledLogger LogCollection *CollectionWriter LogsPDH *string - ArvMount *exec.Cmd - ArvMountPoint string - HostOutputDir string - OutputPDH string - CancelLock sync.Mutex - Cancelled bool - SigChan chan os.Signal - finalState string + RunArvMount + MkTempDir + ArvMount *exec.Cmd + ArvMountPoint string + HostOutputDir string + CleanupTempDir []string + Binds []string + OutputPDH *string + CancelLock sync.Mutex + Cancelled bool + SigChan chan os.Signal + ArvMountExit chan error + finalState string } // SetupSignals sets up signal handling to gracefully terminate the underlying // Docker container and update state when receiving a TERM, INT or QUIT signal. -func (runner *ContainerRunner) SetupSignals() error { +func (runner *ContainerRunner) SetupSignals() { runner.SigChan = make(chan os.Signal, 1) signal.Notify(runner.SigChan, syscall.SIGTERM) signal.Notify(runner.SigChan, syscall.SIGINT) signal.Notify(runner.SigChan, syscall.SIGQUIT) go func(sig <-chan os.Signal) { - for _ = range sig { + for range sig { if !runner.Cancelled { runner.CancelLock.Lock() runner.Cancelled = true @@ -126,8 +113,6 @@ func (runner *ContainerRunner) SetupSignals() error { } } }(runner.SigChan) - - return nil } // LoadImage determines the docker image id from the container record and @@ -135,10 +120,10 @@ func (runner *ContainerRunner) SetupSignals() error { // the image from Keep. func (runner *ContainerRunner) LoadImage() (err error) { - runner.CrunchLog.Printf("Fetching Docker image from collection '%s'", runner.ContainerRecord.ContainerImage) + runner.CrunchLog.Printf("Fetching Docker image from collection '%s'", runner.Container.ContainerImage) - var collection CollectionRecord - err = runner.ArvClient.Get("collections", runner.ContainerRecord.ContainerImage, nil, &collection) + var collection arvados.Collection + err = runner.ArvClient.Get("collections", runner.Container.ContainerImage, nil, &collection) if err != nil { return fmt.Errorf("While getting container image collection: %v", err) } @@ -177,14 +162,92 @@ func (runner *ContainerRunner) LoadImage() (err error) { return nil } -func (runner *ContainerRunner) SetupMounts(hostConfig *dockerclient.HostConfig) (err error) { - runner.ArvMountPoint = ioutil.TempDir("", "keep") +func (runner *ContainerRunner) ArvMountCmd(arvMountCmd []string, token string) (c *exec.Cmd, err error) { + c = exec.Command("arv-mount", arvMountCmd...) + + // Copy our environment, but override ARVADOS_API_TOKEN with + // the container auth token. + c.Env = nil + for _, s := range os.Environ() { + if !strings.HasPrefix(s, "ARVADOS_API_TOKEN=") { + c.Env = append(c.Env, s) + } + } + c.Env = append(c.Env, "ARVADOS_API_TOKEN="+token) + + nt := NewThrottledLogger(runner.NewLogWriter("arv-mount")) + c.Stdout = nt + c.Stderr = nt + + err = c.Start() + if err != nil { + return nil, err + } + + statReadme := make(chan bool) + runner.ArvMountExit = make(chan error) + + keepStatting := true + go func() { + for keepStatting { + time.Sleep(100 * time.Millisecond) + _, err = os.Stat(fmt.Sprintf("%s/by_id/README", runner.ArvMountPoint)) + if err == nil { + keepStatting = false + statReadme <- true + } + } + close(statReadme) + }() + + go func() { + runner.ArvMountExit <- c.Wait() + close(runner.ArvMountExit) + }() + + select { + case <-statReadme: + break + case err := <-runner.ArvMountExit: + runner.ArvMount = nil + keepStatting = false + return nil, err + } + + return c, nil +} + +func (runner *ContainerRunner) SetupMounts() (err error) { + runner.ArvMountPoint, err = runner.MkTempDir("", "keep") + if err != nil { + return fmt.Errorf("While creating keep mount temp dir: %v", err) + } + + runner.CleanupTempDir = append(runner.CleanupTempDir, runner.ArvMountPoint) + pdhOnly := true tmpcount := 0 - arvMountCmd := []string{"--foreground"} + arvMountCmd := []string{"--foreground", "--allow-other", "--read-write"} collectionPaths := []string{} + runner.Binds = nil + + for bind, mnt := range runner.Container.Mounts { + if bind == "stdout" { + // Is it a "file" mount kind? + if mnt.Kind != "file" { + return fmt.Errorf("Unsupported mount kind '%s' for stdout. Only 'file' is supported.", mnt.Kind) + } + + // Does path start with OutputPath? + prefix := runner.Container.OutputPath + if !strings.HasSuffix(prefix, "/") { + prefix += "/" + } + if !strings.HasPrefix(mnt.Path, prefix) { + return fmt.Errorf("Stdout path does not start with OutputPath: %s, %s", mnt.Path, prefix) + } + } - for bind, mnt := range runner.ContainerRecord.Mounts { if mnt.Kind == "collection" { var src string if mnt.UUID != "" && mnt.PortableDataHash != "" { @@ -195,36 +258,46 @@ func (runner *ContainerRunner) SetupMounts(hostConfig *dockerclient.HostConfig) return fmt.Errorf("Writing to existing collections currently not permitted.") } pdhOnly = false - src = fmt.Sprintf("%s/by_id/%s", arvMountPoint, mnt.UUID) + src = fmt.Sprintf("%s/by_id/%s", runner.ArvMountPoint, mnt.UUID) } else if mnt.PortableDataHash != "" { if mnt.Writable { return fmt.Errorf("Can never write to a collection specified by portable data hash") } - src = fmt.Sprintf("%s/by_id/%s", arvMountPoint, mnt.PortableDataHash) + src = fmt.Sprintf("%s/by_id/%s", runner.ArvMountPoint, mnt.PortableDataHash) } else { - src = fmt.Sprintf("%s/tmp%i", arvMountPoint, tmpcount) + src = fmt.Sprintf("%s/tmp%d", runner.ArvMountPoint, tmpcount) arvMountCmd = append(arvMountCmd, "--mount-tmp") - arvMountCmd = append(arvMountCmd, fmt.Sprintf("tmp%i", tmpcount)) + arvMountCmd = append(arvMountCmd, fmt.Sprintf("tmp%d", tmpcount)) tmpcount += 1 } if mnt.Writable { - if bind == runner.ContainerRecord.OutputPath { + if bind == runner.Container.OutputPath { runner.HostOutputDir = src } - hostConfig.Binds = append(hostConfig.Binds, fmt.Sprintf("%s:%s", src, bind)) + runner.Binds = append(runner.Binds, fmt.Sprintf("%s:%s", src, bind)) } else { - hostConfig.Binds = append(hostConfig.Binds, fmt.Sprintf("%s:%s:ro", src, bind)) + runner.Binds = append(runner.Binds, fmt.Sprintf("%s:%s:ro", src, bind)) } - collectionPaths = append(collections, src) + collectionPaths = append(collectionPaths, src) } else if mnt.Kind == "tmp" { - if bind == runner.ContainerRecord.OutputPath { - runner.HostOutputDir = ioutil.TempDir("", "") - hostConfig.Binds = append(hostConfig.Binds, fmt.Sprintf("%s:%s", runner.HostOutputDir, bind)) + if bind == runner.Container.OutputPath { + runner.HostOutputDir, err = runner.MkTempDir("", "") + if err != nil { + return fmt.Errorf("While creating mount temp dir: %v", err) + } + st, staterr := os.Stat(runner.HostOutputDir) + if staterr != nil { + return fmt.Errorf("While Stat on temp dir: %v", staterr) + } + err = os.Chmod(runner.HostOutputDir, st.Mode()|os.ModeSetgid|0777) + if staterr != nil { + return fmt.Errorf("While Chmod temp dir: %v", err) + } + runner.CleanupTempDir = append(runner.CleanupTempDir, runner.HostOutputDir) + runner.Binds = append(runner.Binds, fmt.Sprintf("%s:%s", runner.HostOutputDir, bind)) } else { - hostConfig.Binds = append(hostConfig.Binds, bind) + runner.Binds = append(runner.Binds, bind) } - } else { - return fmt.Errorf("Unknown mount kind '%s'", mnt.Kind) } } @@ -237,16 +310,19 @@ func (runner *ContainerRunner) SetupMounts(hostConfig *dockerclient.HostConfig) } else { arvMountCmd = append(arvMountCmd, "--mount-by-id", "by_id") } - arvMountCmd = append(arvMountCmd, arvMountPoint) + arvMountCmd = append(arvMountCmd, runner.ArvMountPoint) - runner.ArvMount = exec.Command("arv-mount", arvMountCmd) - err = runner.ArvMount.Start() + token, err := runner.ContainerToken() + if err != nil { + return fmt.Errorf("could not get container token: %s", err) + } + + runner.ArvMount, err = runner.RunArvMount(arvMountCmd, token) if err != nil { - runner.ArvMount = nil return fmt.Errorf("While trying to start arv-mount: %v", err) } - for p := range collectionPaths { + for _, p := range collectionPaths { _, err = os.Stat(p) if err != nil { return fmt.Errorf("While checking that input files exist: %v", err) @@ -256,73 +332,148 @@ func (runner *ContainerRunner) SetupMounts(hostConfig *dockerclient.HostConfig) return nil } -// StartContainer creates the container and runs it. -func (runner *ContainerRunner) StartContainer() (err error) { - runner.CrunchLog.Print("Creating Docker container") +func (runner *ContainerRunner) ProcessDockerAttach(containerReader io.Reader) { + // Handle docker log protocol + // https://docs.docker.com/engine/reference/api/docker_remote_api_v1.15/#attach-to-a-container - runner.CancelLock.Lock() - defer runner.CancelLock.Unlock() + header := make([]byte, 8) + for { + _, readerr := io.ReadAtLeast(containerReader, header, 8) - if runner.Cancelled { - return ErrCancelled - } + if readerr == nil { + readsize := int64(header[7]) | (int64(header[6]) << 8) | (int64(header[5]) << 16) | (int64(header[4]) << 24) + if header[0] == 1 { + // stdout + _, readerr = io.CopyN(runner.Stdout, containerReader, readsize) + } else { + // stderr + _, readerr = io.CopyN(runner.Stderr, containerReader, readsize) + } + } - runner.ContainerConfig.Cmd = runner.ContainerRecord.Command - if runner.ContainerRecord.Cwd != "." { - runner.ContainerConfig.WorkingDir = runner.ContainerRecord.Cwd - } - for k, v := range runner.ContainerRecord.Environment { - runner.ContainerConfig.Env = append(runner.ContainerConfig.Env, k+"="+v) - } - runner.ContainerID, err = runner.Docker.CreateContainer(&runner.ContainerConfig, "", nil) - if err != nil { - return fmt.Errorf("While creating container: %v", err) + if readerr != nil { + if readerr != io.EOF { + runner.CrunchLog.Printf("While reading docker logs: %v", readerr) + } + + closeerr := runner.Stdout.Close() + if closeerr != nil { + runner.CrunchLog.Printf("While closing stdout logs: %v", closeerr) + } + + closeerr = runner.Stderr.Close() + if closeerr != nil { + runner.CrunchLog.Printf("While closing stderr logs: %v", closeerr) + } + + runner.loggingDone <- true + close(runner.loggingDone) + return + } } - hostConfig := &dockerclient.HostConfig{} +} + +// AttachLogs connects the docker container stdout and stderr logs to the +// Arvados logger which logs to Keep and the API server logs table. +func (runner *ContainerRunner) AttachStreams() (err error) { + + runner.CrunchLog.Print("Attaching container streams") - err = runner.SetupMounts(hostConfig) + var containerReader io.Reader + containerReader, err = runner.Docker.AttachContainer(runner.ContainerID, + &dockerclient.AttachOptions{Stream: true, Stdout: true, Stderr: true}) if err != nil { - return fmt.Errorf("While setting up mounts: %v", err) + return fmt.Errorf("While attaching container stdout/stderr streams: %v", err) } - runner.CrunchLog.Printf("Starting Docker container id '%s'", runner.ContainerID) - err = runner.Docker.StartContainer(runner.ContainerID, hostConfig) - if err != nil { - return fmt.Errorf("While starting container: %v", err) + runner.loggingDone = make(chan bool) + + if stdoutMnt, ok := runner.Container.Mounts["stdout"]; ok { + stdoutPath := stdoutMnt.Path[len(runner.Container.OutputPath):] + index := strings.LastIndex(stdoutPath, "/") + if index > 0 { + subdirs := stdoutPath[:index] + if subdirs != "" { + st, err := os.Stat(runner.HostOutputDir) + if err != nil { + return fmt.Errorf("While Stat on temp dir: %v", err) + } + stdoutPath := path.Join(runner.HostOutputDir, subdirs) + err = os.MkdirAll(stdoutPath, st.Mode()|os.ModeSetgid|0777) + if err != nil { + return fmt.Errorf("While MkdirAll %q: %v", stdoutPath, err) + } + } + } + stdoutFile, err := os.Create(path.Join(runner.HostOutputDir, stdoutPath)) + if err != nil { + return fmt.Errorf("While creating stdout file: %v", err) + } + runner.Stdout = stdoutFile + } else { + runner.Stdout = NewThrottledLogger(runner.NewLogWriter("stdout")) } + runner.Stderr = NewThrottledLogger(runner.NewLogWriter("stderr")) + + go runner.ProcessDockerAttach(containerReader) return nil } -// AttachLogs connects the docker container stdout and stderr logs to the -// Arvados logger which logs to Keep and the API server logs table. -func (runner *ContainerRunner) AttachLogs() (err error) { +// CreateContainer creates the docker container. +func (runner *ContainerRunner) CreateContainer() error { + runner.CrunchLog.Print("Creating Docker container") - runner.CrunchLog.Print("Attaching container logs") + runner.ContainerConfig.Cmd = runner.Container.Command + if runner.Container.Cwd != "." { + runner.ContainerConfig.WorkingDir = runner.Container.Cwd + } - var stderrReader, stdoutReader io.Reader - stderrReader, err = runner.Docker.ContainerLogs(runner.ContainerID, &dockerclient.LogOptions{Follow: true, Stderr: true}) - if err != nil { - return fmt.Errorf("While getting container standard error: %v", err) + for k, v := range runner.Container.Environment { + runner.ContainerConfig.Env = append(runner.ContainerConfig.Env, k+"="+v) + } + if wantAPI := runner.Container.RuntimeConstraints.API; wantAPI != nil && *wantAPI { + tok, err := runner.ContainerToken() + if err != nil { + return err + } + runner.ContainerConfig.Env = append(runner.ContainerConfig.Env, + "ARVADOS_API_TOKEN="+tok, + "ARVADOS_API_HOST="+os.Getenv("ARVADOS_API_HOST"), + "ARVADOS_API_HOST_INSECURE="+os.Getenv("ARVADOS_API_HOST_INSECURE"), + ) + runner.ContainerConfig.NetworkDisabled = false + } else { + runner.ContainerConfig.NetworkDisabled = true } - stdoutReader, err = runner.Docker.ContainerLogs(runner.ContainerID, &dockerclient.LogOptions{Follow: true, Stdout: true}) + + var err error + runner.ContainerID, err = runner.Docker.CreateContainer(&runner.ContainerConfig, "", nil) if err != nil { - return fmt.Errorf("While getting container standard output: %v", err) + return fmt.Errorf("While creating container: %v", err) } - runner.loggingDone = make(chan bool) + runner.HostConfig = dockerclient.HostConfig{Binds: runner.Binds, + LogConfig: dockerclient.LogConfig{Type: "none"}} - runner.Stdout = NewThrottledLogger(runner.NewLogWriter("stdout")) - runner.Stderr = NewThrottledLogger(runner.NewLogWriter("stderr")) - go ReadWriteLines(stdoutReader, runner.Stdout, runner.loggingDone) - go ReadWriteLines(stderrReader, runner.Stderr, runner.loggingDone) + return runner.AttachStreams() +} +// StartContainer starts the docker container created by CreateContainer. +func (runner *ContainerRunner) StartContainer() error { + runner.CrunchLog.Printf("Starting Docker container id '%s'", runner.ContainerID) + err := runner.Docker.StartContainer(runner.ContainerID, &runner.HostConfig) + if err != nil { + return fmt.Errorf("could not start container: %v", err) + } return nil } // WaitFinish waits for the container to terminate, capture the exit code, and // close the stdout/stderr logging. func (runner *ContainerRunner) WaitFinish() error { + runner.CrunchLog.Print("Waiting for container to finish") + result := runner.Docker.Wait(runner.ContainerID) wr := <-result if wr.Error != nil { @@ -330,42 +481,35 @@ func (runner *ContainerRunner) WaitFinish() error { } runner.ExitCode = &wr.ExitCode - // drain stdout/stderr - <-runner.loggingDone + // wait for stdout/stderr to complete <-runner.loggingDone - runner.Stdout.Close() - runner.Stderr.Close() - return nil } -// HandleOutput sets the output and unmounts the FUSE mount. -func (runner *ContainerRunner) HandleOutput() error { - if runner.ArvMount != nil { - defer func() { - umount := exec.Command("fusermount", "-z", "-u", runner.ArvMountPoint) - umount.Run() - }() +// HandleOutput sets the output, unmounts the FUSE mount, and deletes temporary directories +func (runner *ContainerRunner) CaptureOutput() error { + if runner.finalState != "Complete" { + return nil } - if runner.finalState != "Complete" { + if runner.HostOutputDir == "" { return nil } - _, err = os.Stat(os.HostOutputPath) + _, err := os.Stat(runner.HostOutputDir) if err != nil { return fmt.Errorf("While checking host output path: %v", err) } var manifestText string - collectionMetafile = fmt.Sprintf("%s/.arvados#collection", os.HostOutputPath) + collectionMetafile := fmt.Sprintf("%s/.arvados#collection", runner.HostOutputDir) _, err = os.Stat(collectionMetafile) if err != nil { // Regular directory - cw := CollectionWriter{runner.Kc} - manifestText, err = cw.WriteTree(os.HostOutputPath, runner.CrunchLog) + cw := CollectionWriter{runner.Kc, nil, sync.Mutex{}} + manifestText, err = cw.WriteTree(runner.HostOutputDir, runner.CrunchLog.Logger) if err != nil { return fmt.Errorf("While uploading output files: %v", err) } @@ -377,7 +521,7 @@ func (runner *ContainerRunner) HandleOutput() error { } defer file.Close() - rec := CollectionRecord{} + var rec arvados.Collection err = json.NewDecoder(file).Decode(&rec) if err != nil { return fmt.Errorf("While reading FUSE metafile: %v", err) @@ -385,17 +529,44 @@ func (runner *ContainerRunner) HandleOutput() error { manifestText = rec.ManifestText } - var response CollectionRecord - err = runner.ArvClient.Create("collections", &response) + var response arvados.Collection + err = runner.ArvClient.Create("collections", + arvadosclient.Dict{ + "collection": arvadosclient.Dict{ + "manifest_text": manifestText}}, + &response) if err != nil { return fmt.Errorf("While creating output collection: %v", err) } - runner.OutputPDH = response.PortableDataHash + runner.OutputPDH = new(string) + *runner.OutputPDH = response.PortableDataHash return nil } +func (runner *ContainerRunner) CleanupDirs() { + if runner.ArvMount != nil { + umount := exec.Command("fusermount", "-z", "-u", runner.ArvMountPoint) + umnterr := umount.Run() + if umnterr != nil { + runner.CrunchLog.Printf("While running fusermount: %v", umnterr) + } + + mnterr := <-runner.ArvMountExit + if mnterr != nil { + runner.CrunchLog.Printf("Arv-mount exit error: %v", mnterr) + } + } + + for _, tmpdir := range runner.CleanupTempDir { + rmerr := os.RemoveAll(tmpdir) + if rmerr != nil { + runner.CrunchLog.Printf("While cleaning up temporary directory %s: %v", tmpdir, rmerr) + } + } +} + // CommitLogs posts the collection containing the final container logs. func (runner *ContainerRunner) CommitLogs() error { runner.CrunchLog.Print(runner.finalState) @@ -405,190 +576,250 @@ func (runner *ContainerRunner) CommitLogs() error { // point, but re-open crunch log with ArvClient in case there are any // other further (such as failing to write the log to Keep!) while // shutting down - runner.CrunchLog = NewThrottledLogger(&ArvLogWriter{runner.ArvClient, runner.ContainerRecord.UUID, + runner.CrunchLog = NewThrottledLogger(&ArvLogWriter{runner.ArvClient, runner.Container.UUID, "crunch-run", nil}) + if runner.LogsPDH != nil { + // If we have already assigned something to LogsPDH, + // we must be closing the re-opened log, which won't + // end up getting attached to the container record and + // therefore doesn't need to be saved as a collection + // -- it exists only to send logs to other channels. + return nil + } + mt, err := runner.LogCollection.ManifestText() if err != nil { return fmt.Errorf("While creating log manifest: %v", err) } - response := make(map[string]string) + var response arvados.Collection err = runner.ArvClient.Create("collections", - arvadosclient.Dict{"name": "logs for " + runner.ContainerRecord.UUID, - "manifest_text": mt}, - response) + arvadosclient.Dict{ + "collection": arvadosclient.Dict{ + "name": "logs for " + runner.Container.UUID, + "manifest_text": mt}}, + &response) if err != nil { return fmt.Errorf("While creating log collection: %v", err) } - runner.LogsPDH = new(string) - *runner.LogsPDH = response["portable_data_hash"] + runner.LogsPDH = &response.PortableDataHash return nil } -// UpdateContainerRecordRunning updates the container state to "Running" -func (runner *ContainerRunner) UpdateContainerRecordRunning() error { - update := arvadosclient.Dict{"state": "Running"} - return runner.ArvClient.Update("containers", runner.ContainerRecord.UUID, update, nil) +// UpdateContainerRunning updates the container state to "Running" +func (runner *ContainerRunner) UpdateContainerRunning() error { + runner.CancelLock.Lock() + defer runner.CancelLock.Unlock() + if runner.Cancelled { + return ErrCancelled + } + return runner.ArvClient.Update("containers", runner.Container.UUID, + arvadosclient.Dict{"container": arvadosclient.Dict{"state": "Running"}}, nil) } -// UpdateContainerRecordComplete updates the container record state on API -// server to "Complete" or "Cancelled" -func (runner *ContainerRunner) UpdateContainerRecordComplete() error { - update := arvadosclient.Dict{} - if runner.LogsPDH != nil { - update["log"] = *runner.LogsPDH +// ContainerToken returns the api_token the container (and any +// arv-mount processes) are allowed to use. +func (runner *ContainerRunner) ContainerToken() (string, error) { + if runner.token != "" { + return runner.token, nil } - if runner.ExitCode != nil { - update["exit_code"] = *runner.ExitCode + + var auth arvados.APIClientAuthorization + err := runner.ArvClient.Call("GET", "containers", runner.Container.UUID, "auth", nil, &auth) + if err != nil { + return "", err } + runner.token = auth.APIToken + return runner.token, nil +} +// UpdateContainerComplete updates the container record state on API +// server to "Complete" or "Cancelled" +func (runner *ContainerRunner) UpdateContainerFinal() error { + update := arvadosclient.Dict{} update["state"] = runner.finalState - update["output"] = runner.OutputPDH + if runner.finalState == "Complete" { + if runner.LogsPDH != nil { + update["log"] = *runner.LogsPDH + } + if runner.ExitCode != nil { + update["exit_code"] = *runner.ExitCode + } + if runner.OutputPDH != nil { + update["output"] = *runner.OutputPDH + } + } + return runner.ArvClient.Update("containers", runner.Container.UUID, arvadosclient.Dict{"container": update}, nil) +} - return runner.ArvClient.Update("containers", runner.ContainerRecord.UUID, update, nil) +// IsCancelled returns the value of Cancelled, with goroutine safety. +func (runner *ContainerRunner) IsCancelled() bool { + runner.CancelLock.Lock() + defer runner.CancelLock.Unlock() + return runner.Cancelled } // NewArvLogWriter creates an ArvLogWriter func (runner *ContainerRunner) NewArvLogWriter(name string) io.WriteCloser { - return &ArvLogWriter{runner.ArvClient, runner.ContainerRecord.UUID, name, runner.LogCollection.Open(name + ".txt")} + return &ArvLogWriter{runner.ArvClient, runner.Container.UUID, name, runner.LogCollection.Open(name + ".txt")} } // Run the full container lifecycle. -func (runner *ContainerRunner) Run(containerUUID string) (err error) { - runner.CrunchLog.Printf("Executing container '%s'", containerUUID) +func (runner *ContainerRunner) Run() (err error) { + runner.CrunchLog.Printf("Executing container '%s'", runner.Container.UUID) + + hostname, hosterr := os.Hostname() + if hosterr != nil { + runner.CrunchLog.Printf("Error getting hostname '%v'", hosterr) + } else { + runner.CrunchLog.Printf("Executing on host '%s'", hostname) + } + + // Clean up temporary directories _after_ finalizing + // everything (if we've made any by then) + defer runner.CleanupDirs() - var runerr, waiterr error + runner.finalState = "Queued" defer func() { - if err != nil { - runner.CrunchLog.Print(err) + // checkErr prints e (unless it's nil) and sets err to + // e (unless err is already non-nil). Thus, if err + // hasn't already been assigned when Run() returns, + // this cleanup func will cause Run() to return the + // first non-nil error that is passed to checkErr(). + checkErr := func(e error) { + if e == nil { + return + } + runner.CrunchLog.Print(e) + if err == nil { + err = e + } } - if runner.Cancelled { - runner.finalState = "Cancelled" - } else { - runner.finalState = "Complete" - } + // Log the error encountered in Run(), if any + checkErr(err) - // (6) handle output - outputerr := runner.HandleOutput() - if outputerr != nil { - runner.CrunchLog.Print(outputrr) + if runner.finalState == "Queued" { + runner.UpdateContainerFinal() + return } - // (7) write logs - logerr := runner.CommitLogs() - if logerr != nil { - runner.CrunchLog.Print(logerr) + if runner.IsCancelled() { + runner.finalState = "Cancelled" + // but don't return yet -- we still want to + // capture partial output and write logs } - // (8) update container record with results - updateerr := runner.UpdateContainerRecordComplete() - if updateerr != nil { - runner.CrunchLog.Print(updateerr) - } + checkErr(runner.CaptureOutput()) + checkErr(runner.CommitLogs()) + checkErr(runner.UpdateContainerFinal()) + // The real log is already closed, but then we opened + // a new one in case we needed to log anything while + // finalizing. runner.CrunchLog.Close() - - if err == nil { - if runerr != nil { - err = runerr - } else if waiterr != nil { - err = runerr - } else if logerr != nil { - err = logerr - } else if updateerr != nil { - err = updateerr - } - } }() - err = runner.ArvClient.Get("containers", containerUUID, nil, &runner.ContainerRecord) + err = runner.ArvClient.Get("containers", runner.Container.UUID, nil, &runner.Container) if err != nil { - return fmt.Errorf("While getting container record: %v", err) + err = fmt.Errorf("While getting container record: %v", err) + return } - // (0) setup signal handling - err = runner.SetupSignals() - if err != nil { - return fmt.Errorf("While setting up signal handling: %v", err) - } + // setup signal handling + runner.SetupSignals() - // (1) check for and/or load image + // check for and/or load image err = runner.LoadImage() if err != nil { - return fmt.Errorf("While loading container image: %v", err) + err = fmt.Errorf("While loading container image: %v", err) + return } - // (2) start container - err = runner.StartContainer() + // set up FUSE mount and binds + err = runner.SetupMounts() if err != nil { - if err == ErrCancelled { - err = nil - } + err = fmt.Errorf("While setting up mounts: %v", err) return } - // (3) update container record state - err = runner.UpdateContainerRecordRunning() + err = runner.CreateContainer() if err != nil { - runner.CrunchLog.Print(err) + return } - // (4) attach container logs - runerr = runner.AttachLogs() - if runerr != nil { - runner.CrunchLog.Print(runerr) + if runner.IsCancelled() { + return } - // (5) wait for container to finish - waiterr = runner.WaitFinish() + err = runner.UpdateContainerRunning() + if err != nil { + return + } + runner.finalState = "Cancelled" + err = runner.StartContainer() + if err != nil { + return + } + + err = runner.WaitFinish() + if err == nil { + runner.finalState = "Complete" + } return } // NewContainerRunner creates a new container runner. func NewContainerRunner(api IArvadosClient, kc IKeepClient, - docker ThinDockerClient) *ContainerRunner { + docker ThinDockerClient, + containerUUID string) *ContainerRunner { cr := &ContainerRunner{ArvClient: api, Kc: kc, Docker: docker} cr.NewLogWriter = cr.NewArvLogWriter - cr.LogCollection = &CollectionWriter{kc, nil} + cr.RunArvMount = cr.ArvMountCmd + cr.MkTempDir = ioutil.TempDir + cr.LogCollection = &CollectionWriter{kc, nil, sync.Mutex{}} + cr.Container.UUID = containerUUID cr.CrunchLog = NewThrottledLogger(cr.NewLogWriter("crunch-run")) + cr.CrunchLog.Immediate = log.New(os.Stderr, containerUUID+" ", 0) return cr } func main() { flag.Parse() + containerId := flag.Arg(0) + api, err := arvadosclient.MakeArvadosClient() if err != nil { - log.Fatal(err) + log.Fatalf("%s: %v", containerId, err) } api.Retries = 8 var kc *keepclient.KeepClient kc, err = keepclient.MakeKeepClient(&api) if err != nil { - log.Fatal(err) + log.Fatalf("%s: %v", containerId, err) } kc.Retries = 4 var docker *dockerclient.DockerClient docker, err = dockerclient.NewDockerClient("unix:///var/run/docker.sock", nil) if err != nil { - log.Fatal(err) + log.Fatalf("%s: %v", containerId, err) } - cr := NewContainerRunner(api, kc, docker) + cr := NewContainerRunner(api, kc, docker, containerId) - err = cr.Run(flag.Arg(0)) + err = cr.Run() if err != nil { - log.Fatal(err) + log.Fatalf("%s: %v", containerId, err) } }