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moby--moby/daemon/monitor.go
Sebastiaan van Stijn eaa1e8a8c4 Merge pull request #21839 from WeiZhang555/add-start-event
Add missing "start" event back for auto-restart container
2016-04-08 17:52:22 -07:00

150 lines
3.8 KiB
Go

package daemon
import (
"errors"
"fmt"
"io"
"runtime"
"strconv"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/libcontainerd"
"github.com/docker/docker/runconfig"
)
// StateChanged updates daemon state changes from containerd
func (daemon *Daemon) StateChanged(id string, e libcontainerd.StateInfo) error {
c := daemon.containers.Get(id)
if c == nil {
return fmt.Errorf("no such container: %s", id)
}
switch e.State {
case libcontainerd.StateOOM:
// StateOOM is Linux specific and should never be hit on Windows
if runtime.GOOS == "windows" {
return errors.New("Received StateOOM from libcontainerd on Windows. This should never happen.")
}
daemon.LogContainerEvent(c, "oom")
case libcontainerd.StateExit:
c.Lock()
defer c.Unlock()
c.Wait()
c.Reset(false)
c.SetStopped(platformConstructExitStatus(e))
attributes := map[string]string{
"exitCode": strconv.Itoa(int(e.ExitCode)),
}
daemon.LogContainerEventWithAttributes(c, "die", attributes)
daemon.Cleanup(c)
// FIXME: here is race condition between two RUN instructions in Dockerfile
// because they share same runconfig and change image. Must be fixed
// in builder/builder.go
if err := c.ToDisk(); err != nil {
return err
}
return daemon.postRunProcessing(c, e)
case libcontainerd.StateRestart:
c.Lock()
defer c.Unlock()
c.Reset(false)
c.RestartCount++
c.SetRestarting(platformConstructExitStatus(e))
attributes := map[string]string{
"exitCode": strconv.Itoa(int(e.ExitCode)),
}
daemon.LogContainerEventWithAttributes(c, "die", attributes)
if err := c.ToDisk(); err != nil {
return err
}
return daemon.postRunProcessing(c, e)
case libcontainerd.StateExitProcess:
c.Lock()
defer c.Unlock()
if execConfig := c.ExecCommands.Get(e.ProcessID); execConfig != nil {
ec := int(e.ExitCode)
execConfig.ExitCode = &ec
execConfig.Running = false
execConfig.Wait()
if err := execConfig.CloseStreams(); err != nil {
logrus.Errorf("%s: %s", c.ID, err)
}
// remove the exec command from the container's store only and not the
// daemon's store so that the exec command can be inspected.
c.ExecCommands.Delete(execConfig.ID)
} else {
logrus.Warnf("Ignoring StateExitProcess for %v but no exec command found", e)
}
case libcontainerd.StateStart, libcontainerd.StateRestore:
c.SetRunning(int(e.Pid), e.State == libcontainerd.StateStart)
c.HasBeenManuallyStopped = false
if err := c.ToDisk(); err != nil {
c.Reset(false)
return err
}
daemon.LogContainerEvent(c, "start")
case libcontainerd.StatePause:
c.Paused = true
daemon.LogContainerEvent(c, "pause")
case libcontainerd.StateResume:
c.Paused = false
daemon.LogContainerEvent(c, "unpause")
}
return nil
}
// AttachStreams is called by libcontainerd to connect the stdio.
func (daemon *Daemon) AttachStreams(id string, iop libcontainerd.IOPipe) error {
var s *runconfig.StreamConfig
c := daemon.containers.Get(id)
if c == nil {
ec, err := daemon.getExecConfig(id)
if err != nil {
return fmt.Errorf("no such exec/container: %s", id)
}
s = ec.StreamConfig
} else {
s = c.StreamConfig
if err := daemon.StartLogging(c); err != nil {
c.Reset(false)
return err
}
}
if stdin := s.Stdin(); stdin != nil {
if iop.Stdin != nil {
go func() {
io.Copy(iop.Stdin, stdin)
iop.Stdin.Close()
}()
}
} else {
if c != nil && !c.Config.Tty {
// tty is enabled, so dont close containerd's iopipe stdin.
if iop.Stdin != nil {
iop.Stdin.Close()
}
}
}
copy := func(w io.Writer, r io.Reader) {
s.Add(1)
go func() {
if _, err := io.Copy(w, r); err != nil {
logrus.Errorf("%v stream copy error: %v", id, err)
}
s.Done()
}()
}
if iop.Stdout != nil {
copy(s.Stdout(), iop.Stdout)
}
if iop.Stderr != nil {
copy(s.Stderr(), iop.Stderr)
}
return nil
}