83 lines
3.1 KiB
Go
83 lines
3.1 KiB
Go
package daemon
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
"time"
|
|
|
|
"github.com/Sirupsen/logrus"
|
|
"github.com/docker/docker/api/errors"
|
|
"github.com/docker/docker/container"
|
|
)
|
|
|
|
// ContainerStop looks for the given container and terminates it,
|
|
// waiting the given number of seconds before forcefully killing the
|
|
// container. If a negative number of seconds is given, ContainerStop
|
|
// will wait for a graceful termination. An error is returned if the
|
|
// container is not found, is already stopped, or if there is a
|
|
// problem stopping the container.
|
|
func (daemon *Daemon) ContainerStop(name string, seconds *int) error {
|
|
container, err := daemon.GetContainer(name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !container.IsRunning() {
|
|
err := fmt.Errorf("Container %s is already stopped", name)
|
|
return errors.NewErrorWithStatusCode(err, http.StatusNotModified)
|
|
}
|
|
if seconds == nil {
|
|
stopTimeout := container.StopTimeout()
|
|
seconds = &stopTimeout
|
|
}
|
|
if err := daemon.containerStop(container, *seconds); err != nil {
|
|
return fmt.Errorf("Cannot stop container %s: %v", name, err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// containerStop halts a container by sending a stop signal, waiting for the given
|
|
// duration in seconds, and then calling SIGKILL and waiting for the
|
|
// process to exit. If a negative duration is given, Stop will wait
|
|
// for the initial signal forever. If the container is not running Stop returns
|
|
// immediately.
|
|
func (daemon *Daemon) containerStop(container *container.Container, seconds int) error {
|
|
if !container.IsRunning() {
|
|
return nil
|
|
}
|
|
|
|
daemon.stopHealthchecks(container)
|
|
|
|
stopSignal := container.StopSignal()
|
|
// 1. Send a stop signal
|
|
if err := daemon.killPossiblyDeadProcess(container, stopSignal); err != nil {
|
|
// While normally we might "return err" here we're not going to
|
|
// because if we can't stop the container by this point then
|
|
// it's probably because it's already stopped. Meaning, between
|
|
// the time of the IsRunning() call above and now it stopped.
|
|
// Also, since the err return will be environment specific we can't
|
|
// look for any particular (common) error that would indicate
|
|
// that the process is already dead vs something else going wrong.
|
|
// So, instead we'll give it up to 2 more seconds to complete and if
|
|
// by that time the container is still running, then the error
|
|
// we got is probably valid and so we force kill it.
|
|
if _, err := container.WaitStop(2 * time.Second); err != nil {
|
|
logrus.Infof("Container failed to stop after sending signal %d to the process, force killing", stopSignal)
|
|
if err := daemon.killPossiblyDeadProcess(container, 9); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
// 2. Wait for the process to exit on its own
|
|
if _, err := container.WaitStop(time.Duration(seconds) * time.Second); err != nil {
|
|
logrus.Infof("Container %v failed to exit within %d seconds of signal %d - using the force", container.ID, seconds, stopSignal)
|
|
// 3. If it doesn't, then send SIGKILL
|
|
if err := daemon.Kill(container); err != nil {
|
|
container.WaitStop(-1 * time.Second)
|
|
logrus.Warn(err) // Don't return error because we only care that container is stopped, not what function stopped it
|
|
}
|
|
}
|
|
|
|
daemon.LogContainerEvent(container, "stop")
|
|
return nil
|
|
}
|