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https://github.com/moby/moby.git
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3285c27503
log statement should reflect how long it actually waited, not how long
it theoretically could wait based on the 'seconds' integer passed in.
Signed-off-by: Cam <gh@sparr.email>
(cherry picked from commit d15ce134ef)
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
101 lines
3.3 KiB
Go
101 lines
3.3 KiB
Go
package daemon // import "github.com/docker/docker/daemon"
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import (
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"context"
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"time"
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containerpkg "github.com/docker/docker/container"
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"github.com/docker/docker/errdefs"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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)
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// ContainerStop looks for the given container and stops it.
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// In case the container fails to stop gracefully within a time duration
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// specified by the timeout argument, in seconds, it is forcefully
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// terminated (killed).
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//
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// If the timeout is nil, the container's StopTimeout value is used, if set,
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// otherwise the engine default. A negative timeout value can be specified,
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// meaning no timeout, i.e. no forceful termination is performed.
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func (daemon *Daemon) ContainerStop(name string, timeout *int) error {
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container, err := daemon.GetContainer(name)
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if err != nil {
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return err
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}
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if !container.IsRunning() {
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return containerNotModifiedError{running: false}
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}
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if timeout == nil {
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stopTimeout := container.StopTimeout()
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timeout = &stopTimeout
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}
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if err := daemon.containerStop(container, *timeout); err != nil {
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return errdefs.System(errors.Wrapf(err, "cannot stop container: %s", name))
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}
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return nil
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}
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// containerStop sends a stop signal, waits, sends a kill signal.
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func (daemon *Daemon) containerStop(container *containerpkg.Container, seconds int) error {
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// TODO propagate a context down to this function
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ctx := context.TODO()
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if !container.IsRunning() {
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return nil
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}
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var wait time.Duration
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if seconds >= 0 {
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wait = time.Duration(seconds) * time.Second
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}
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success := func() error {
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daemon.LogContainerEvent(container, "stop")
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return nil
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}
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stopSignal := container.StopSignal()
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// 1. Send a stop signal
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err := daemon.killPossiblyDeadProcess(container, stopSignal)
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if err != nil {
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wait = 2 * time.Second
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}
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var subCtx context.Context
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var cancel context.CancelFunc
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if seconds >= 0 {
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subCtx, cancel = context.WithTimeout(ctx, wait)
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} else {
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subCtx, cancel = context.WithCancel(ctx)
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}
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defer cancel()
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if status := <-container.Wait(subCtx, containerpkg.WaitConditionNotRunning); status.Err() == nil {
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// container did exit, so ignore any previous errors and return
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return success()
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}
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if err != nil {
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// the container has still not exited, and the kill function errored, so log the error here:
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logrus.WithError(err).WithField("container", container.ID).Errorf("Error sending stop (signal %d) to container", stopSignal)
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}
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if seconds < 0 {
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// if the client requested that we never kill / wait forever, but container.Wait was still
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// interrupted (parent context cancelled, for example), we should propagate the signal failure
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return err
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}
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logrus.WithField("container", container.ID).Infof("Container failed to exit within %s of signal %d - using the force", wait, stopSignal)
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// Stop either failed or container didnt exit, so fallback to kill.
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if err := daemon.Kill(container); err != nil {
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// got a kill error, but give container 2 more seconds to exit just in case
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subCtx, cancel := context.WithTimeout(ctx, 2*time.Second)
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defer cancel()
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if status := <-container.Wait(subCtx, containerpkg.WaitConditionNotRunning); status.Err() == nil {
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// container did exit, so ignore error and return
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return success()
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}
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logrus.WithError(err).WithField("container", container.ID).Error("Error killing the container")
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return err
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}
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return success()
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}
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