123 lines
3.1 KiB
Go
123 lines
3.1 KiB
Go
package daemon
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import (
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"io"
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/docker/docker/daemon/logger"
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"github.com/docker/docker/pkg/stdcopy"
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)
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// ContainerAttachWithLogsConfig holds the streams to use when connecting to a container to view logs.
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type ContainerAttachWithLogsConfig struct {
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InStream io.ReadCloser
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OutStream io.Writer
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UseStdin, UseStdout, UseStderr bool
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Logs, Stream bool
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}
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// ContainerAttachWithLogs attaches to logs according to the config passed in. See ContainerAttachWithLogsConfig.
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func (daemon *Daemon) ContainerAttachWithLogs(prefixOrName string, c *ContainerAttachWithLogsConfig) error {
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container, err := daemon.Get(prefixOrName)
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if err != nil {
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return err
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}
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var errStream io.Writer
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if !container.Config.Tty {
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errStream = stdcopy.NewStdWriter(c.OutStream, stdcopy.Stderr)
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c.OutStream = stdcopy.NewStdWriter(c.OutStream, stdcopy.Stdout)
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} else {
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errStream = c.OutStream
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}
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var stdin io.ReadCloser
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var stdout, stderr io.Writer
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if c.UseStdin {
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stdin = c.InStream
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}
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if c.UseStdout {
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stdout = c.OutStream
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}
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if c.UseStderr {
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stderr = errStream
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}
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return daemon.attachWithLogs(container, stdin, stdout, stderr, c.Logs, c.Stream)
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}
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// ContainerWsAttachWithLogsConfig attach with websockets, since all
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// stream data is delegated to the websocket to handle there.
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type ContainerWsAttachWithLogsConfig struct {
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InStream io.ReadCloser
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OutStream, ErrStream io.Writer
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Logs, Stream bool
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}
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// ContainerWsAttachWithLogs websocket connection
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func (daemon *Daemon) ContainerWsAttachWithLogs(prefixOrName string, c *ContainerWsAttachWithLogsConfig) error {
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container, err := daemon.Get(prefixOrName)
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if err != nil {
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return err
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}
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return daemon.attachWithLogs(container, c.InStream, c.OutStream, c.ErrStream, c.Logs, c.Stream)
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}
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func (daemon *Daemon) attachWithLogs(container *Container, stdin io.ReadCloser, stdout, stderr io.Writer, logs, stream bool) error {
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if logs {
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logDriver, err := daemon.getLogger(container)
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if err != nil {
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return err
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}
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cLog, ok := logDriver.(logger.LogReader)
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if !ok {
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return logger.ErrReadLogsNotSupported
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}
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logs := cLog.ReadLogs(logger.ReadConfig{Tail: -1})
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LogLoop:
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for {
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select {
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case msg, ok := <-logs.Msg:
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if !ok {
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break LogLoop
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}
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if msg.Source == "stdout" && stdout != nil {
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stdout.Write(msg.Line)
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}
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if msg.Source == "stderr" && stderr != nil {
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stderr.Write(msg.Line)
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}
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case err := <-logs.Err:
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logrus.Errorf("Error streaming logs: %v", err)
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break LogLoop
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}
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}
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}
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daemon.LogContainerEvent(container, "attach")
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//stream
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if stream {
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var stdinPipe io.ReadCloser
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if stdin != nil {
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r, w := io.Pipe()
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go func() {
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defer w.Close()
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defer logrus.Debugf("Closing buffered stdin pipe")
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io.Copy(w, stdin)
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}()
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stdinPipe = r
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}
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<-container.Attach(stdinPipe, stdout, stderr)
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// If we are in stdinonce mode, wait for the process to end
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// otherwise, simply return
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if container.Config.StdinOnce && !container.Config.Tty {
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container.WaitStop(-1 * time.Second)
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}
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}
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return nil
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}
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