// TODO(vishh): Refactor the code to avoid having to specify stream config as part of both create and start.
func (s *containerRouter) postContainerExecStart(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
if versions.GreaterThan(version, "1.21") {
if err := httputils.CheckForJSON(r); err != nil {
return err
}
}
var (
execName = vars["name"]
stdin, inStream io.ReadCloser
stdout, stderr, outStream io.Writer
)
execStartCheck := &types.ExecStartCheck{}
if err := json.NewDecoder(r.Body).Decode(execStartCheck); err != nil {
return err
}
if exists, err := s.backend.ExecExists(execName); !exists {
return err
}
if !execStartCheck.Detach {
var err error
// Setting up the streaming http interface.
inStream, outStream, err = httputils.HijackConnection(w)
if err != nil {
return err
}
defer httputils.CloseStreams(inStream, outStream)
if _, ok := r.Header["Upgrade"]; ok {
fmt.Fprintf(outStream, "HTTP/1.1 101 UPGRADED\r\nContent-Type: application/vnd.docker.raw-stream\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n")
} else {
fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
}
stdin = inStream
stdout = outStream
if !execStartCheck.Tty {
stderr = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
stdout = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
}
}
// Now run the user process in container.
if err := s.backend.ContainerExecStart(execName, stdin, stdout, stderr); err != nil {
if execStartCheck.Detach {
return err
}
stdout.Write([]byte(err.Error() + "\r\n"))
logrus.Errorf("Error running exec in container: %v", err)
}
return nil
}
func handleContainerLogs(w http.ResponseWriter, r *http.Request) {
var outStream, errStream io.Writer
outStream = ioutils.NewWriteFlusher(w)
// not sure how to test follow
if err := r.ParseForm(); err != nil {
http.Error(w, err.Error(), 500)
}
stdout, stderr := getBoolValue(r.Form.Get("stdout")), getBoolValue(r.Form.Get("stderr"))
if stderr {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
}
if stdout {
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
}
var i int
if tail, err := strconv.Atoi(r.Form.Get("tail")); err == nil && tail > 0 {
i = 50 - tail
if i < 0 {
i = 0
}
}
for ; i < 50; i++ {
line := fmt.Sprintf("line %d", i)
if getBoolValue(r.Form.Get("timestamps")) {
l := &jsonlog.JSONLog{Log: line, Created: time.Now()}
line = fmt.Sprintf("%s %s", l.Created.Format(timeutils.RFC3339NanoFixed), line)
}
if i%2 == 0 && stderr {
fmt.Fprintln(errStream, line)
} else if i%2 == 1 && stdout {
fmt.Fprintln(outStream, line)
}
}
}
func (daemon *Daemon) ContainerAttachWithLogs(name string, c *ContainerAttachWithLogsConfig) error {
container, err := daemon.Get(name)
if err != nil {
return err
}
var errStream io.Writer
if !container.Config.Tty && c.Multiplex {
errStream = stdcopy.NewStdWriter(c.OutStream, stdcopy.Stderr)
c.OutStream = stdcopy.NewStdWriter(c.OutStream, stdcopy.Stdout)
} else {
errStream = c.OutStream
}
var stdin io.ReadCloser
var stdout, stderr io.Writer
if c.UseStdin {
stdin = c.InStream
}
if c.UseStdout {
stdout = c.OutStream
}
if c.UseStderr {
stderr = errStream
}
return container.AttachWithLogs(stdin, stdout, stderr, c.Logs, c.Stream)
}
func (daemon *Daemon) ContainerAttachWithLogs(container *Container, c *ContainerAttachWithLogsConfig) error {
var errStream io.Writer
if !container.Config.Tty {
errStream = stdcopy.NewStdWriter(c.OutStream, stdcopy.Stderr)
c.OutStream = stdcopy.NewStdWriter(c.OutStream, stdcopy.Stdout)
} else {
errStream = c.OutStream
}
var stdin io.ReadCloser
var stdout, stderr io.Writer
if c.UseStdin {
stdin = c.InStream
}
if c.UseStdout {
stdout = c.OutStream
}
if c.UseStderr {
stderr = errStream
}
return container.AttachWithLogs(stdin, stdout, stderr, c.Logs, c.Stream)
}
func (c *Container) attach(stdin io.ReadCloser, stdout io.WriteCloser, winsize *hypervisor.WindowSize, rsp chan<- error) error {
if c.p.sandbox == nil || c.descript == nil {
err := fmt.Errorf("container not ready for attach")
c.Log(ERROR, err)
return err
}
tty := &hypervisor.TtyIO{
Stdin: stdin,
Stdout: stdout,
Callback: make(chan *runvtypes.VmResponse, 1),
}
if stdout != nil {
if !c.hasTty() {
tty.Stderr = stdcopy.NewStdWriter(stdout, stdcopy.Stderr)
tty.Stdout = stdcopy.NewStdWriter(stdout, stdcopy.Stdout)
}
}
if rsp != nil {
go func() {
rsp <- tty.WaitForFinish()
}()
}
return c.p.sandbox.Attach(tty, c.Id(), winsize)
}
// TODO(vishh): Refactor the code to avoid having to specify stream config as part of both create and start.
func postContainerExecStart(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return nil
}
var (
name = vars["name"]
job = eng.Job("execStart", name)
errOut io.Writer = os.Stderr
)
if err := job.DecodeEnv(r.Body); err != nil {
return err
}
if !job.GetenvBool("Detach") {
// Setting up the streaming http interface.
inStream, outStream, err := hijackServer(w)
if err != nil {
return err
}
defer func() {
if tcpc, ok := inStream.(*net.TCPConn); ok {
tcpc.CloseWrite()
} else {
inStream.Close()
}
}()
defer func() {
if tcpc, ok := outStream.(*net.TCPConn); ok {
tcpc.CloseWrite()
} else if closer, ok := outStream.(io.Closer); ok {
closer.Close()
}
}()
var errStream io.Writer
fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
if !job.GetenvBool("Tty") && version.GreaterThanOrEqualTo("1.6") {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
} else {
errStream = outStream
}
job.Stdin.Add(inStream)
job.Stdout.Add(outStream)
job.Stderr.Set(errStream)
errOut = outStream
}
// Now run the user process in container.
job.SetCloseIO(false)
if err := job.Run(); err != nil {
fmt.Fprintf(errOut, "Error starting exec command in container %s: %s\n", name, err)
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (p *XPod) StartExec(stdin io.ReadCloser, stdout io.WriteCloser, containerId, execId string) error {
p.statusLock.RLock()
es, ok := p.execs[execId]
p.statusLock.RUnlock()
if !ok {
err := fmt.Errorf("no exec %s exists for container %s", execId, containerId)
p.Log(ERROR, err)
return err
}
tty := &hypervisor.TtyIO{
Stdin: stdin,
Stdout: stdout,
Callback: make(chan *types.VmResponse, 1),
}
if !es.Terminal && stdout != nil {
tty.Stderr = stdcopy.NewStdWriter(stdout, stdcopy.Stderr)
tty.Stdout = stdcopy.NewStdWriter(stdout, stdcopy.Stdout)
}
var fin = true
for fin {
select {
case fin = <-es.finChan:
es.Log(DEBUG, "try to drain the sync chan")
default:
fin = false
es.Log(DEBUG, "the sync chan is empty")
}
}
go func(es *Exec) {
result := p.sandbox.WaitProcess(false, []string{execId}, -1)
if result == nil {
es.Log(ERROR, "can not wait exec")
return
}
r, ok := <-result
if !ok {
es.Log(ERROR, "waiting exec interrupted")
return
}
es.Log(DEBUG, "exec terminated at %v with code %d", r.FinishedAt, r.Code)
es.ExitCode = uint8(r.Code)
select {
case es.finChan <- true:
es.Log(DEBUG, "wake exec stopped chan")
default:
es.Log(WARNING, "exec already set as stopped")
}
}(es)
return p.sandbox.Exec(es.Container, es.Id, es.Cmds, es.Terminal, tty)
}
func postContainersAttach(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
d := getDaemon(eng)
cont, err := d.Get(vars["name"])
if err != nil {
return err
}
inStream, outStream, err := hijackServer(w)
if err != nil {
return err
}
defer closeStreams(inStream, outStream)
var errStream io.Writer
if _, ok := r.Header["Upgrade"]; ok {
fmt.Fprintf(outStream, "HTTP/1.1 101 UPGRADED\r\nContent-Type: application/vnd.docker.raw-stream\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n")
} else {
fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
}
if !cont.Config.Tty && version.GreaterThanOrEqualTo("1.6") {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
} else {
errStream = outStream
}
logs := toBool(r.Form.Get("logs"))
stream := toBool(r.Form.Get("stream"))
var stdin io.ReadCloser
var stdout, stderr io.Writer
if toBool(r.Form.Get("stdin")) {
stdin = inStream
}
if toBool(r.Form.Get("stdout")) {
stdout = outStream
}
if toBool(r.Form.Get("stderr")) {
stderr = errStream
}
if err := cont.AttachWithLogs(stdin, stdout, stderr, logs, stream); err != nil {
fmt.Fprintf(outStream, "Error attaching: %s\n", err)
}
return nil
}
// ContainerAttachWithLogs attaches to logs according to the config passed in. See ContainerAttachWithLogsConfig.
func (daemon *Daemon) ContainerAttachWithLogs(prefixOrName string, c *ContainerAttachWithLogsConfig) error {
if c.Hijacker == nil {
return derr.ErrorCodeNoHijackConnection.WithArgs(prefixOrName)
}
container, err := daemon.GetContainer(prefixOrName)
if err != nil {
return derr.ErrorCodeNoSuchContainer.WithArgs(prefixOrName)
}
if container.IsPaused() {
return derr.ErrorCodePausedContainer.WithArgs(prefixOrName)
}
conn, _, err := c.Hijacker.Hijack()
if err != nil {
return err
}
defer conn.Close()
// Flush the options to make sure the client sets the raw mode
conn.Write([]byte{})
inStream := conn.(io.ReadCloser)
outStream := conn.(io.Writer)
if c.Upgrade {
fmt.Fprintf(outStream, "HTTP/1.1 101 UPGRADED\r\nContent-Type: application/vnd.docker.raw-stream\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n")
} else {
fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
}
var errStream io.Writer
if !container.Config.Tty {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
} else {
errStream = outStream
}
var stdin io.ReadCloser
var stdout, stderr io.Writer
if c.UseStdin {
stdin = inStream
}
if c.UseStdout {
stdout = outStream
}
if c.UseStderr {
stderr = errStream
}
if err := daemon.attachWithLogs(container, stdin, stdout, stderr, c.Logs, c.Stream, c.DetachKeys); err != nil {
fmt.Fprintf(outStream, "Error attaching: %s\n", err)
}
return nil
}
func postContainersAttach(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
var (
job = eng.Job("container_inspect", vars["name"])
c, err = job.Stdout.AddEnv()
)
if err != nil {
return err
}
if err = job.Run(); err != nil {
return err
}
inStream, outStream, err := hijackServer(w)
if err != nil {
return err
}
defer closeStreams(inStream, outStream)
var errStream io.Writer
if _, ok := r.Header["Upgrade"]; ok {
fmt.Fprintf(outStream, "HTTP/1.1 101 UPGRADED\r\nContent-Type: application/vnd.docker.raw-stream\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n")
} else {
fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
}
if c.GetSubEnv("Config") != nil && !c.GetSubEnv("Config").GetBool("Tty") && version.GreaterThanOrEqualTo("1.6") {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
} else {
errStream = outStream
}
job = eng.Job("attach", vars["name"])
job.Setenv("logs", r.Form.Get("logs"))
job.Setenv("stream", r.Form.Get("stream"))
job.Setenv("stdin", r.Form.Get("stdin"))
job.Setenv("stdout", r.Form.Get("stdout"))
job.Setenv("stderr", r.Form.Get("stderr"))
job.Stdin.Add(inStream)
job.Stdout.Add(outStream)
job.Stderr.Set(errStream)
if err := job.Run(); err != nil {
fmt.Fprintf(outStream, "Error attaching: %s\n", err)
}
return nil
}
// TODO(vishh): Refactor the code to avoid having to specify stream config as part of both create and start.
func (s *Server) postContainerExecStart(version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return nil
}
var (
execName = vars["name"]
stdin io.ReadCloser
stdout io.Writer
stderr io.Writer
)
execStartCheck := &types.ExecStartCheck{}
if err := json.NewDecoder(r.Body).Decode(execStartCheck); err != nil {
return err
}
if !execStartCheck.Detach {
// Setting up the streaming http interface.
inStream, outStream, err := hijackServer(w)
if err != nil {
return err
}
defer closeStreams(inStream, outStream)
var errStream io.Writer
if _, ok := r.Header["Upgrade"]; ok {
fmt.Fprintf(outStream, "HTTP/1.1 101 UPGRADED\r\nContent-Type: application/vnd.docker.raw-stream\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n")
} else {
fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
}
if !execStartCheck.Tty && version.GreaterThanOrEqualTo("1.6") {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
} else {
errStream = outStream
}
stdin = inStream
stdout = outStream
stderr = errStream
}
// Now run the user process in container.
if err := s.daemon.ContainerExecStart(execName, stdin, stdout, stderr); err != nil {
logrus.Errorf("Error starting exec command in container %s: %s", execName, err)
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (daemon *Daemon) StartExec(stdin io.ReadCloser, stdout io.WriteCloser, containerId, execId string) error {
tty := &hypervisor.TtyIO{
Stdin: stdin,
Stdout: stdout,
Callback: make(chan *types.VmResponse, 1),
}
glog.V(1).Infof("Get container id is %s", containerId)
pod, _, err := daemon.GetPodByContainerIdOrName(containerId)
if err != nil {
return err
}
status := pod.Status()
if status == nil || status.Status != types.S_POD_RUNNING {
return fmt.Errorf("container %s is not running", containerId)
}
es := status.GetExec(execId)
if es == nil {
return fmt.Errorf("Can not find exec %s", execId)
}
vmId, err := daemon.GetVmByPodId(pod.Id)
if err != nil {
return err
}
vm, ok := daemon.VmList.Get(vmId)
if !ok {
err = fmt.Errorf("Can not find VM whose Id is %s!", vmId)
return err
}
if !es.Terminal {
tty.Stderr = stdcopy.NewStdWriter(stdout, stdcopy.Stderr)
tty.Stdout = stdcopy.NewStdWriter(stdout, stdcopy.Stdout)
tty.OutCloser = stdout
}
if err := vm.Exec(es.Container, es.Id, es.Cmds, es.Terminal, tty); err != nil {
return err
}
defer func() {
glog.V(2).Info("Defer function for exec!")
}()
return nil
}
// TODO(vishh): Refactor the code to avoid having to specify stream config as part of both create and start.
func (s *Server) postContainerExecStart(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
if err := checkForJSON(r); err != nil {
return err
}
var (
execName = vars["name"]
stdin, inStream io.ReadCloser
stdout, stderr, outStream io.Writer
)
execStartCheck := &types.ExecStartCheck{}
if err := json.NewDecoder(r.Body).Decode(execStartCheck); err != nil {
return err
}
if !execStartCheck.Detach {
var err error
// Setting up the streaming http interface.
inStream, outStream, err = hijackServer(w)
if err != nil {
return err
}
defer closeStreams(inStream, outStream)
if _, ok := r.Header["Upgrade"]; ok {
fmt.Fprintf(outStream, "HTTP/1.1 101 UPGRADED\r\nContent-Type: application/vnd.docker.raw-stream\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n")
} else {
fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
}
stdin = inStream
stdout = outStream
if !execStartCheck.Tty {
stderr = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
stdout = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
}
} else {
outStream = w
}
// Now run the user process in container.
if err := s.daemon.ContainerExecStart(execName, stdin, stdout, stderr); err != nil {
fmt.Fprintf(outStream, "Error running exec in container: %v\n", err)
}
return nil
}
// ContainerAttach attaches to logs according to the config passed in. See ContainerAttachConfig.
func (daemon *Daemon) ContainerAttach(prefixOrName string, c *backend.ContainerAttachConfig) error {
keys := []byte{}
var err error
if c.DetachKeys != "" {
keys, err = term.ToBytes(c.DetachKeys)
if err != nil {
return fmt.Errorf("Invalid escape keys (%s) provided", c.DetachKeys)
}
}
container, err := daemon.GetContainer(prefixOrName)
if err != nil {
return err
}
if container.IsPaused() {
err := fmt.Errorf("Container %s is paused. Unpause the container before attach", prefixOrName)
return errors.NewRequestConflictError(err)
}
inStream, outStream, errStream, err := c.GetStreams()
if err != nil {
return err
}
defer inStream.Close()
if !container.Config.Tty && c.MuxStreams {
errStream = stdcopy.NewStdWriter(errStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
}
var stdin io.ReadCloser
var stdout, stderr io.Writer
if c.UseStdin {
stdin = inStream
}
if c.UseStdout {
stdout = outStream
}
if c.UseStderr {
stderr = errStream
}
if err := daemon.containerAttach(container, stdin, stdout, stderr, c.Logs, c.Stream, keys); err != nil {
fmt.Fprintf(outStream, "Error attaching: %s\n", err)
}
return nil
}
// ContainerLogs hooks up a container's stdout and stderr streams
// configured with the given struct.
func (c *Container) ContainerLogs(name string, config *backend.ContainerLogsConfig, started chan struct{}) error {
defer trace.End(trace.Begin(""))
// Look up the container name in the metadata cache to get long ID
vc := cache.ContainerCache().GetContainer(name)
if vc == nil {
return NotFoundError(name)
}
name = vc.ContainerID
tailLines, since, err := c.validateContainerLogsConfig(vc, config)
if err != nil {
return err
}
// Outstream modification (from Docker's code) so the stream is streamed with the
// necessary headers that the CLI expects. This is Docker's scheme.
wf := ioutils.NewWriteFlusher(config.OutStream)
defer wf.Close()
wf.Flush()
outStream := io.Writer(wf)
if !vc.Config.Tty {
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
}
// Make a call to our proxy to handle the remoting
err = c.containerProxy.StreamContainerLogs(name, outStream, started, config.Timestamps, config.Follow, since, tailLines)
return err
}
func getContainersLogs(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
var (
inspectJob = eng.Job("container_inspect", vars["name"])
logsJob = eng.Job("logs", vars["name"])
c, err = inspectJob.Stdout.AddEnv()
)
if err != nil {
return err
}
logsJob.Setenv("follow", r.Form.Get("follow"))
logsJob.Setenv("tail", r.Form.Get("tail"))
logsJob.Setenv("stdout", r.Form.Get("stdout"))
logsJob.Setenv("stderr", r.Form.Get("stderr"))
logsJob.Setenv("timestamps", r.Form.Get("timestamps"))
// Validate args here, because we can't return not StatusOK after job.Run() call
stdout, stderr := logsJob.GetenvBool("stdout"), logsJob.GetenvBool("stderr")
if !(stdout || stderr) {
return fmt.Errorf("Bad parameters: you must choose at least one stream")
}
if err = inspectJob.Run(); err != nil {
return err
}
var outStream, errStream io.Writer
outStream = utils.NewWriteFlusher(w)
if c.GetSubEnv("Config") != nil && !c.GetSubEnv("Config").GetBool("Tty") && version.GreaterThanOrEqualTo("1.6") {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
} else {
errStream = outStream
}
logsJob.Stdout.Add(outStream)
logsJob.Stderr.Set(errStream)
if err := logsJob.Run(); err != nil {
fmt.Fprintf(outStream, "Error running logs job: %s\n", err)
}
return nil
}
func (daemon *Daemon) Attach(stdin io.ReadCloser, stdout io.WriteCloser, container string) error {
var (
vmId string
err error
)
tty := &hypervisor.TtyIO{
Stdin: stdin,
Stdout: stdout,
Callback: make(chan *types.VmResponse, 1),
}
pod, idx, err := daemon.GetPodByContainerIdOrName(container)
if err != nil {
return err
}
vmId, err = daemon.GetVmByPodId(pod.Id)
if err != nil {
return err
}
vm, ok := daemon.VmList.Get(vmId)
if !ok {
err = fmt.Errorf("Can find VM whose Id is %s!", vmId)
return err
}
if !pod.Spec.Containers[idx].Tty {
tty.Stderr = stdcopy.NewStdWriter(stdout, stdcopy.Stderr)
tty.Stdout = stdcopy.NewStdWriter(stdout, stdcopy.Stdout)
tty.OutCloser = stdout
}
err = vm.Attach(tty, container, nil)
if err != nil {
return err
}
defer func() {
glog.V(2).Info("Defer function for attach!")
}()
err = tty.WaitForFinish()
return err
}
func (daemon *Daemon) StartPod(stdin io.ReadCloser, stdout io.WriteCloser, podId, vmId string, attach bool) (int, string, error) {
var ttys []*hypervisor.TtyIO = []*hypervisor.TtyIO{}
glog.Infof("pod:%s, vm:%s", podId, vmId)
p, ok := daemon.PodList.Get(podId)
if !ok {
return -1, "", fmt.Errorf("The pod(%s) can not be found, please create it first", podId)
}
var lazy bool = hypervisor.HDriver.SupportLazyMode() && vmId == ""
if attach {
glog.V(1).Info("Run pod with tty attached")
tty := &hypervisor.TtyIO{
Stdin: stdin,
Stdout: stdout,
Callback: make(chan *types.VmResponse, 1),
}
if !p.Spec.Containers[0].Tty {
tty.Stderr = stdcopy.NewStdWriter(stdout, stdcopy.Stderr)
tty.Stdout = stdcopy.NewStdWriter(stdout, stdcopy.Stdout)
tty.OutCloser = stdout
}
ttys = append(ttys, tty)
}
code, cause, err := daemon.StartInternal(p, vmId, nil, lazy, ttys)
if err != nil {
glog.Error(err.Error())
return -1, "", err
}
if err := p.InitializeFinished(daemon); err != nil {
glog.Error(err.Error())
return -1, "", err
}
if len(ttys) > 0 {
ttys[0].WaitForFinish()
}
return code, cause, nil
}
// ContainerAttach attaches to logs according to the config passed in. See ContainerAttachConfig.
func (daemon *Daemon) ContainerAttach(prefixOrName string, c *backend.ContainerAttachConfig) error {
container, err := daemon.GetContainer(prefixOrName)
if err != nil {
return derr.ErrorCodeNoSuchContainer.WithArgs(prefixOrName)
}
if container.IsPaused() {
return derr.ErrorCodePausedContainer.WithArgs(prefixOrName)
}
inStream, outStream, errStream, err := c.GetStreams()
if err != nil {
return err
}
defer inStream.Close()
if !container.Config.Tty && c.MuxStreams {
errStream = stdcopy.NewStdWriter(errStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
}
var stdin io.ReadCloser
var stdout, stderr io.Writer
if c.UseStdin {
stdin = inStream
}
if c.UseStdout {
stdout = outStream
}
if c.UseStderr {
stderr = errStream
}
if err := daemon.containerAttach(container, stdin, stdout, stderr, c.Logs, c.Stream, c.DetachKeys); err != nil {
fmt.Fprintf(outStream, "Error attaching: %s\n", err)
}
return nil
}
func (s *DockerServer) attachContainer(w http.ResponseWriter, r *http.Request) {
id := mux.Vars(r)["id"]
container, _, err := s.findContainer(id)
if err != nil {
http.Error(w, err.Error(), http.StatusNotFound)
return
}
hijacker, ok := w.(http.Hijacker)
if !ok {
http.Error(w, "cannot hijack connection", http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/vnd.docker.raw-stream")
w.WriteHeader(http.StatusOK)
conn, _, err := hijacker.Hijack()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
wg := sync.WaitGroup{}
if r.URL.Query().Get("stdin") == "1" {
wg.Add(1)
go func() {
ioutil.ReadAll(conn)
wg.Done()
}()
}
outStream := stdcopy.NewStdWriter(conn, stdcopy.Stdout)
if container.State.Running {
fmt.Fprintf(outStream, "Container is running\n")
} else {
fmt.Fprintf(outStream, "Container is not running\n")
}
fmt.Fprintln(outStream, "What happened?")
fmt.Fprintln(outStream, "Something happened")
wg.Wait()
if r.URL.Query().Get("stream") == "1" {
for {
time.Sleep(1e6)
s.cMut.RLock()
if !container.State.StartedAt.IsZero() && !container.State.Running {
s.cMut.RUnlock()
break
}
s.cMut.RUnlock()
}
}
conn.Close()
}
// ContainerAttach attaches to logs according to the config passed in. See ContainerAttachConfig.
func (c *Container) ContainerAttach(name string, ca *backend.ContainerAttachConfig) error {
defer trace.End(trace.Begin(name))
// Look up the container name in the metadata cache to get long ID
vc := cache.ContainerCache().GetContainer(name)
if vc == nil {
return NotFoundError(name)
}
id := vc.ContainerID
client := c.containerProxy.Client()
handle, err := c.Handle(id, name)
if err != nil {
return err
}
bind, err := client.Interaction.InteractionBind(interaction.NewInteractionBindParamsWithContext(ctx).
WithConfig(&models.InteractionBindConfig{
Handle: handle,
}))
if err != nil {
return InternalServerError(err.Error())
}
handle, ok := bind.Payload.Handle.(string)
if !ok {
return InternalServerError(fmt.Sprintf("Type assertion failed for %#+v", handle))
}
// commit the handle; this will reconfigure the vm
_, err = client.Containers.Commit(containers.NewCommitParamsWithContext(ctx).WithHandle(handle))
if err != nil {
switch err := err.(type) {
case *containers.CommitNotFound:
return NotFoundError(name)
case *containers.CommitConflict:
return ConflictError(err.Error())
case *containers.CommitDefault:
return InternalServerError(err.Payload.Message)
default:
return InternalServerError(err.Error())
}
}
clStdin, clStdout, clStderr, err := ca.GetStreams()
if err != nil {
return InternalServerError("Unable to get stdio streams for calling client")
}
defer clStdin.Close()
if !vc.Config.Tty && ca.MuxStreams {
// replace the stdout/stderr with Docker's multiplex stream
if ca.UseStdout {
clStderr = stdcopy.NewStdWriter(clStderr, stdcopy.Stderr)
}
if ca.UseStderr {
clStdout = stdcopy.NewStdWriter(clStdout, stdcopy.Stdout)
}
}
err = c.containerProxy.AttachStreams(context.Background(), vc, clStdin, clStdout, clStderr, ca)
if err != nil {
if _, ok := err.(DetachError); ok {
log.Infof("Detach detected, tearing down connection")
client = c.containerProxy.Client()
handle, err = c.Handle(id, name)
if err != nil {
return err
}
unbind, err := client.Interaction.InteractionUnbind(interaction.NewInteractionUnbindParamsWithContext(ctx).
WithConfig(&models.InteractionUnbindConfig{
Handle: handle,
}))
if err != nil {
return InternalServerError(err.Error())
}
handle, ok = unbind.Payload.Handle.(string)
if !ok {
return InternalServerError("type assertion failed")
}
// commit the handle; this will reconfigure the vm
_, err = client.Containers.Commit(containers.NewCommitParamsWithContext(ctx).WithHandle(handle))
if err != nil {
switch err := err.(type) {
case *containers.CommitNotFound:
return NotFoundError(name)
case *containers.CommitDefault:
return InternalServerError(err.Payload.Message)
default:
return InternalServerError(err.Error())
}
}
}
return err
}
return nil
}
func (daemon *Daemon) ContainerLogs(name string, config *ContainerLogsConfig) error {
var (
lines = -1
format string
)
if !(config.UseStdout || config.UseStderr) {
return fmt.Errorf("You must choose at least one stream")
}
if config.Timestamps {
format = timeutils.RFC3339NanoFixed
}
if config.Tail == "" {
config.Tail = "all"
}
container, err := daemon.Get(name)
if err != nil {
return err
}
var (
outStream = config.OutStream
errStream io.Writer
)
if !container.Config.Tty {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
} else {
errStream = outStream
}
if container.LogDriverType() != "json-file" {
return fmt.Errorf("\"logs\" endpoint is supported only for \"json-file\" logging driver")
}
cLog, err := container.ReadLog("json")
if err != nil && os.IsNotExist(err) {
// Legacy logs
logrus.Debugf("Old logs format")
if config.UseStdout {
cLog, err := container.ReadLog("stdout")
if err != nil {
logrus.Errorf("Error reading logs (stdout): %s", err)
} else if _, err := io.Copy(outStream, cLog); err != nil {
logrus.Errorf("Error streaming logs (stdout): %s", err)
}
}
if config.UseStderr {
cLog, err := container.ReadLog("stderr")
if err != nil {
logrus.Errorf("Error reading logs (stderr): %s", err)
} else if _, err := io.Copy(errStream, cLog); err != nil {
logrus.Errorf("Error streaming logs (stderr): %s", err)
}
}
} else if err != nil {
logrus.Errorf("Error reading logs (json): %s", err)
} else {
if config.Tail != "all" {
var err error
lines, err = strconv.Atoi(config.Tail)
if err != nil {
logrus.Errorf("Failed to parse tail %s, error: %v, show all logs", config.Tail, err)
lines = -1
}
}
if lines != 0 {
if lines > 0 {
f := cLog.(*os.File)
ls, err := tailfile.TailFile(f, lines)
if err != nil {
return err
}
tmp := bytes.NewBuffer([]byte{})
for _, l := range ls {
fmt.Fprintf(tmp, "%s\n", l)
}
cLog = tmp
}
dec := json.NewDecoder(cLog)
l := &jsonlog.JSONLog{}
for {
if err := dec.Decode(l); err == io.EOF {
break
} else if err != nil {
logrus.Errorf("Error streaming logs: %s", err)
break
}
logLine := l.Log
if config.Timestamps {
// format can be "" or time format, so here can't be error
logLine, _ = l.Format(format)
}
if l.Stream == "stdout" && config.UseStdout {
io.WriteString(outStream, logLine)
}
if l.Stream == "stderr" && config.UseStderr {
io.WriteString(errStream, logLine)
}
l.Reset()
}
}
}
if config.Follow && container.IsRunning() {
errors := make(chan error, 2)
wg := sync.WaitGroup{}
if config.UseStdout {
wg.Add(1)
stdoutPipe := container.StdoutLogPipe()
defer stdoutPipe.Close()
go func() {
errors <- jsonlog.WriteLog(stdoutPipe, outStream, format)
wg.Done()
}()
}
if config.UseStderr {
wg.Add(1)
stderrPipe := container.StderrLogPipe()
defer stderrPipe.Close()
go func() {
errors <- jsonlog.WriteLog(stderrPipe, errStream, format)
wg.Done()
}()
}
wg.Wait()
close(errors)
for err := range errors {
if err != nil {
logrus.Errorf("%s", err)
}
}
}
return nil
}
func (daemon *Daemon) GetContainerLogs(container string, config *ContainerLogsConfig) (err error) {
var (
tailLines int
)
p, id, ok := daemon.PodList.GetByContainerIdOrName(container)
if !ok {
err = fmt.Errorf("cannot find container %s", container)
glog.Error(err)
return err
}
l := p.ContainerLogger(id)
if l == nil {
err = fmt.Errorf("cannot get logger for container %s", container)
glog.Error(err)
return err
}
logReader, ok := l.(logger.LogReader)
if !ok {
err = fmt.Errorf("container %s: logger not support read", container)
glog.Error(err)
return err
}
follow := config.Follow && p.IsContainerAlive(id)
tailLines, err = strconv.Atoi(config.Tail)
if err != nil {
tailLines = -1
}
readConfig := logger.ReadConfig{
Since: config.Since,
Tail: tailLines,
Follow: follow,
}
logs := logReader.ReadLogs(readConfig)
wf := ioutils.NewWriteFlusher(config.OutStream)
defer wf.Close()
wf.Flush()
var outStream io.Writer = wf
errStream := outStream
if !p.ContainerHasTty(id) {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
}
for {
select {
case <-config.Stop:
return nil
case e := <-logs.Err:
glog.Errorf("Error streaming logs: %v", e)
return nil
case msg, ok := <-logs.Msg:
if !ok {
glog.V(1).Info("logs: end stream")
logs.Close()
return nil
}
logLine := msg.Line
if config.Timestamps {
logLine = append([]byte(msg.Timestamp.Format(logger.TimeFormat)+" "), logLine...)
}
if msg.Source == "stdout" && config.UseStdout {
glog.V(2).Info("print stdout log: ", logLine)
_, err := outStream.Write(logLine)
if err != nil {
return nil
}
}
if msg.Source == "stderr" && config.UseStderr {
glog.V(2).Info("print stderr log: ", logLine)
_, err := errStream.Write(logLine)
if err != nil {
return nil
}
}
}
}
}
func (daemon *Daemon) ContainerLogs(name string, config *ContainerLogsConfig) error {
var (
lines = -1
format string
)
if !(config.UseStdout || config.UseStderr) {
return fmt.Errorf("You must choose at least one stream")
}
if config.Timestamps {
format = timeutils.RFC3339NanoFixed
}
if config.Tail == "" {
config.Tail = "all"
}
container, err := daemon.Get(name)
if err != nil {
return err
}
var (
outStream = config.OutStream
errStream io.Writer
)
if !container.Config.Tty {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
} else {
errStream = outStream
}
if container.LogDriverType() != jsonfilelog.Name {
return fmt.Errorf("\"logs\" endpoint is supported only for \"json-file\" logging driver")
}
logDriver, err := container.getLogger()
cLog, err := logDriver.GetReader()
if err != nil {
logrus.Errorf("Error reading logs: %s", err)
} else {
// json-file driver
if config.Tail != "all" {
var err error
lines, err = strconv.Atoi(config.Tail)
if err != nil {
logrus.Errorf("Failed to parse tail %s, error: %v, show all logs", config.Tail, err)
lines = -1
}
}
if lines != 0 {
if lines > 0 {
f := cLog.(*os.File)
ls, err := tailfile.TailFile(f, lines)
if err != nil {
return err
}
tmp := bytes.NewBuffer([]byte{})
for _, l := range ls {
fmt.Fprintf(tmp, "%s\n", l)
}
cLog = tmp
}
dec := json.NewDecoder(cLog)
l := &jsonlog.JSONLog{}
for {
l.Reset()
if err := dec.Decode(l); err == io.EOF {
break
} else if err != nil {
logrus.Errorf("Error streaming logs: %s", err)
break
}
logLine := l.Log
if !config.Since.IsZero() && l.Created.Before(config.Since) {
continue
}
if config.Timestamps {
// format can be "" or time format, so here can't be error
logLine, _ = l.Format(format)
}
if l.Stream == "stdout" && config.UseStdout {
io.WriteString(outStream, logLine)
}
if l.Stream == "stderr" && config.UseStderr {
io.WriteString(errStream, logLine)
}
}
}
}
if config.Follow && container.IsRunning() {
chErr := make(chan error)
var stdoutPipe, stderrPipe io.ReadCloser
// write an empty chunk of data (this is to ensure that the
// HTTP Response is sent immediatly, even if the container has
// not yet produced any data)
outStream.Write(nil)
if config.UseStdout {
stdoutPipe = container.StdoutLogPipe()
go func() {
logrus.Debug("logs: stdout stream begin")
chErr <- jsonlog.WriteLog(stdoutPipe, outStream, format, config.Since)
logrus.Debug("logs: stdout stream end")
}()
}
if config.UseStderr {
stderrPipe = container.StderrLogPipe()
go func() {
logrus.Debug("logs: stderr stream begin")
chErr <- jsonlog.WriteLog(stderrPipe, errStream, format, config.Since)
logrus.Debug("logs: stderr stream end")
}()
}
err = <-chErr
if stdoutPipe != nil {
stdoutPipe.Close()
}
if stderrPipe != nil {
stderrPipe.Close()
}
<-chErr // wait for 2nd goroutine to exit, otherwise bad things will happen
if err != nil && err != io.EOF && err != io.ErrClosedPipe {
if e, ok := err.(*net.OpError); ok && e.Err != syscall.EPIPE {
logrus.Errorf("error streaming logs: %v", err)
}
}
}
return nil
}
// ServiceLogs collects service logs and writes them back to `config.OutStream`
func (c *Cluster) ServiceLogs(ctx context.Context, input string, config *backend.ContainerLogsConfig, started chan struct{}) error {
c.RLock()
if !c.isActiveManager() {
c.RUnlock()
return c.errNoManager()
}
service, err := getService(ctx, c.client, input)
if err != nil {
c.RUnlock()
return err
}
stream, err := c.logs.SubscribeLogs(ctx, &swarmapi.SubscribeLogsRequest{
Selector: &swarmapi.LogSelector{
ServiceIDs: []string{service.ID},
},
Options: &swarmapi.LogSubscriptionOptions{
Follow: true,
},
})
if err != nil {
c.RUnlock()
return err
}
wf := ioutils.NewWriteFlusher(config.OutStream)
defer wf.Close()
close(started)
wf.Flush()
outStream := stdcopy.NewStdWriter(wf, stdcopy.Stdout)
errStream := stdcopy.NewStdWriter(wf, stdcopy.Stderr)
// Release the lock before starting the stream.
c.RUnlock()
for {
// Check the context before doing anything.
select {
case <-ctx.Done():
return ctx.Err()
default:
}
subscribeMsg, err := stream.Recv()
if err == io.EOF {
return nil
}
if err != nil {
return err
}
for _, msg := range subscribeMsg.Messages {
data := []byte{}
if config.Timestamps {
ts, err := ptypes.Timestamp(msg.Timestamp)
if err != nil {
return err
}
data = append(data, []byte(ts.Format(logger.TimeFormat)+" ")...)
}
data = append(data, []byte(fmt.Sprintf("%s.node.id=%s,%s.service.id=%s,%s.task.id=%s ",
contextPrefix, msg.Context.NodeID,
contextPrefix, msg.Context.ServiceID,
contextPrefix, msg.Context.TaskID,
))...)
data = append(data, msg.Data...)
switch msg.Stream {
case swarmapi.LogStreamStdout:
outStream.Write(data)
case swarmapi.LogStreamStderr:
errStream.Write(data)
}
}
}
}
func postContainersAttach(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
var (
job = eng.Job("container_inspect", vars["name"])
c, err = job.Stdout.AddEnv()
)
if err != nil {
return err
}
if err = job.Run(); err != nil {
return err
}
monitorDriver := c.Get("MonitorDriver")
if monitorDriver == daemon.MonitorExternal {
Id := c.Get("Id")
// Redirect to monitor socket
return fmt.Errorf("redirect to:%s", fmt.Sprintf("unix://%s/%s.sock", daemon.MonitorSockDir, Id))
}
inStream, outStream, err := hijackServer(w)
if err != nil {
return err
}
defer func() {
if tcpc, ok := inStream.(*net.TCPConn); ok {
tcpc.CloseWrite()
} else {
inStream.Close()
}
}()
defer func() {
if tcpc, ok := outStream.(*net.TCPConn); ok {
tcpc.CloseWrite()
} else if closer, ok := outStream.(io.Closer); ok {
closer.Close()
}
}()
var errStream io.Writer
fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
if c.GetSubEnv("Config") != nil && !c.GetSubEnv("Config").GetBool("Tty") && version.GreaterThanOrEqualTo("1.6") {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
} else {
errStream = outStream
}
job = eng.Job("attach", vars["name"])
job.Setenv("logs", r.Form.Get("logs"))
job.Setenv("stream", r.Form.Get("stream"))
job.Setenv("stdin", r.Form.Get("stdin"))
job.Setenv("stdout", r.Form.Get("stdout"))
job.Setenv("stderr", r.Form.Get("stderr"))
job.Stdin.Add(inStream)
job.Stdout.Add(outStream)
job.Stderr.Set(errStream)
if err := job.Run(); err != nil {
fmt.Fprintf(outStream, "Error attaching: %s\n", err)
}
return nil
}
// ContainerLogs hooks up a container's stdout and stderr streams
// configured with the given struct.
func (daemon *Daemon) ContainerLogs(ctx context.Context, containerName string, config *backend.ContainerLogsConfig, started chan struct{}) error {
container, err := daemon.GetContainer(containerName)
if err != nil {
return err
}
if !(config.ShowStdout || config.ShowStderr) {
return fmt.Errorf("You must choose at least one stream")
}
cLog, err := daemon.getLogger(container)
if err != nil {
return err
}
logReader, ok := cLog.(logger.LogReader)
if !ok {
return logger.ErrReadLogsNotSupported
}
follow := config.Follow && container.IsRunning()
tailLines, err := strconv.Atoi(config.Tail)
if err != nil {
tailLines = -1
}
logrus.Debug("logs: begin stream")
var since time.Time
if config.Since != "" {
s, n, err := timetypes.ParseTimestamps(config.Since, 0)
if err != nil {
return err
}
since = time.Unix(s, n)
}
readConfig := logger.ReadConfig{
Since: since,
Tail: tailLines,
Follow: follow,
}
logs := logReader.ReadLogs(readConfig)
wf := ioutils.NewWriteFlusher(config.OutStream)
defer wf.Close()
close(started)
wf.Flush()
var outStream io.Writer
outStream = wf
errStream := outStream
if !container.Config.Tty {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
}
for {
select {
case err := <-logs.Err:
logrus.Errorf("Error streaming logs: %v", err)
return nil
case <-ctx.Done():
logs.Close()
return nil
case msg, ok := <-logs.Msg:
if !ok {
logrus.Debug("logs: end stream")
logs.Close()
if cLog != container.LogDriver {
// Since the logger isn't cached in the container, which occurs if it is running, it
// must get explicitly closed here to avoid leaking it and any file handles it has.
if err := cLog.Close(); err != nil {
logrus.Errorf("Error closing logger: %v", err)
}
}
return nil
}
logLine := msg.Line
if config.Details {
logLine = append([]byte(msg.Attrs.String()+" "), logLine...)
}
if config.Timestamps {
logLine = append([]byte(msg.Timestamp.Format(logger.TimeFormat)+" "), logLine...)
}
if msg.Source == "stdout" && config.ShowStdout {
outStream.Write(logLine)
}
if msg.Source == "stderr" && config.ShowStderr {
errStream.Write(logLine)
}
}
}
}
// ContainerLogs hooks up a container's stdout and stderr streams
// configured with the given struct.
func (daemon *Daemon) ContainerLogs(containerName string, config *backend.ContainerLogsConfig, started chan struct{}) error {
container, err := daemon.GetContainer(containerName)
if err != nil {
return err
}
if !(config.ShowStdout || config.ShowStderr) {
return fmt.Errorf("You must choose at least one stream")
}
cLog, err := daemon.getLogger(container)
if err != nil {
return err
}
logReader, ok := cLog.(logger.LogReader)
if !ok {
return logger.ErrReadLogsNotSupported
}
follow := config.Follow && container.IsRunning()
tailLines, err := strconv.Atoi(config.Tail)
if err != nil {
tailLines = -1
}
logrus.Debug("logs: begin stream")
var since time.Time
if config.Since != "" {
s, n, err := timetypes.ParseTimestamps(config.Since, 0)
if err != nil {
return err
}
since = time.Unix(s, n)
}
readConfig := logger.ReadConfig{
Since: since,
Tail: tailLines,
Follow: follow,
}
logs := logReader.ReadLogs(readConfig)
wf := ioutils.NewWriteFlusher(config.OutStream)
defer wf.Close()
close(started)
wf.Flush()
var outStream io.Writer = wf
errStream := outStream
if !container.Config.Tty {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
}
for {
select {
case err := <-logs.Err:
logrus.Errorf("Error streaming logs: %v", err)
return nil
case <-config.Stop:
logs.Close()
return nil
case msg, ok := <-logs.Msg:
if !ok {
logrus.Debugf("logs: end stream")
return nil
}
logLine := msg.Line
if config.Timestamps {
logLine = append([]byte(msg.Timestamp.Format(logger.TimeFormat)+" "), logLine...)
}
if msg.Source == "stdout" && config.ShowStdout {
outStream.Write(logLine)
}
if msg.Source == "stderr" && config.ShowStderr {
errStream.Write(logLine)
}
}
}
}
// ContainerLogs hooks up a container's stdout and stderr streams
// configured with the given struct.
func (daemon *Daemon) ContainerLogs(container *Container, config *ContainerLogsConfig) error {
if !(config.UseStdout || config.UseStderr) {
return fmt.Errorf("You must choose at least one stream")
}
outStream := config.OutStream
errStream := outStream
if !container.Config.Tty {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
}
config.OutStream = outStream
cLog, err := container.getLogger()
if err != nil {
return err
}
logReader, ok := cLog.(logger.LogReader)
if !ok {
return logger.ErrReadLogsNotSupported
}
follow := config.Follow && container.IsRunning()
tailLines, err := strconv.Atoi(config.Tail)
if err != nil {
tailLines = -1
}
logrus.Debug("logs: begin stream")
readConfig := logger.ReadConfig{
Since: config.Since,
Tail: tailLines,
Follow: follow,
}
logs := logReader.ReadLogs(readConfig)
for {
select {
case err := <-logs.Err:
logrus.Errorf("Error streaming logs: %v", err)
return nil
case <-config.Stop:
logs.Close()
return nil
case msg, ok := <-logs.Msg:
if !ok {
logrus.Debugf("logs: end stream")
return nil
}
logLine := msg.Line
if config.Timestamps {
logLine = append([]byte(msg.Timestamp.Format(logger.TimeFormat)+" "), logLine...)
}
if msg.Source == "stdout" && config.UseStdout {
outStream.Write(logLine)
}
if msg.Source == "stderr" && config.UseStderr {
errStream.Write(logLine)
}
}
}
}
func (daemon *Daemon) GetContainerLogs(container string, config *ContainerLogsConfig) (err error) {
var (
pod *Pod
cidx int
tailLines int
)
pod, cidx, err = daemon.GetPodByContainerIdOrName(container)
if err != nil {
return err
}
err = pod.getLogger(daemon)
if err != nil {
return err
}
logReader, ok := pod.PodStatus.Containers[cidx].Logs.Driver.(logger.LogReader)
if !ok {
return fmt.Errorf("logger not support read")
}
follow := config.Follow && (pod.PodStatus.Status == types.S_POD_RUNNING)
tailLines, err = strconv.Atoi(config.Tail)
if err != nil {
tailLines = -1
}
readConfig := logger.ReadConfig{
Since: config.Since,
Tail: tailLines,
Follow: follow,
}
logs := logReader.ReadLogs(readConfig)
wf := ioutils.NewWriteFlusher(config.OutStream)
defer wf.Close()
wf.Flush()
var outStream io.Writer = wf
errStream := outStream
if !pod.Spec.Containers[cidx].Tty {
errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
}
for {
select {
case <-config.Stop:
return nil
case e := <-logs.Err:
glog.Errorf("Error streaming logs: %v", e)
return nil
case msg, ok := <-logs.Msg:
if !ok {
glog.V(1).Info("logs: end stream")
logs.Close()
return nil
}
logLine := msg.Line
if config.Timestamps {
logLine = append([]byte(msg.Timestamp.Format(logger.TimeFormat)+" "), logLine...)
}
if msg.Source == "stdout" && config.UseStdout {
glog.V(2).Info("print stdout log: ", logLine)
_, err := outStream.Write(logLine)
if err != nil {
return nil
}
}
if msg.Source == "stderr" && config.UseStderr {
glog.V(2).Info("print stderr log: ", logLine)
_, err := errStream.Write(logLine)
if err != nil {
return nil
}
}
}
}
}