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moby--moby/daemon/resize.go
David Wang e6783656f9 Fix race condition between exec start and resize
Signed-off-by: David Wang <00107082@163.com>
2018-06-08 11:07:48 +08:00

50 lines
1.5 KiB
Go

package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"time"
"github.com/docker/docker/libcontainerd"
)
// ContainerResize changes the size of the TTY of the process running
// in the container with the given name to the given height and width.
func (daemon *Daemon) ContainerResize(name string, height, width int) error {
container, err := daemon.GetContainer(name)
if err != nil {
return err
}
if !container.IsRunning() {
return errNotRunning(container.ID)
}
if err = daemon.containerd.ResizeTerminal(context.Background(), container.ID, libcontainerd.InitProcessName, width, height); err == nil {
attributes := map[string]string{
"height": fmt.Sprintf("%d", height),
"width": fmt.Sprintf("%d", width),
}
daemon.LogContainerEventWithAttributes(container, "resize", attributes)
}
return err
}
// ContainerExecResize changes the size of the TTY of the process
// running in the exec with the given name to the given height and
// width.
func (daemon *Daemon) ContainerExecResize(name string, height, width int) error {
ec, err := daemon.getExecConfig(name)
if err != nil {
return err
}
// TODO: the timeout is hardcoded here, it would be more flexible to make it
// a parameter in resize request context, which would need API changes.
timeout := 10 * time.Second
select {
case <-ec.Started:
return daemon.containerd.ResizeTerminal(context.Background(), ec.ContainerID, ec.ID, width, height)
case <-time.After(timeout):
return fmt.Errorf("timeout waiting for exec session ready")
}
}