containerd/supervisor/update.go

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package supervisor
import "github.com/docker/containerd/runtime"
type UpdateEvent struct {
s *Supervisor
}
func (h *UpdateEvent) Handle(e *Event) error {
i, ok := h.s.containers[e.ID]
if !ok {
return ErrContainerNotFound
}
container := i.container
if e.State.Status != "" {
switch e.State.Status {
case runtime.Running:
if err := container.Resume(); err != nil {
return ErrUnknownContainerStatus
}
case runtime.Paused:
if err := container.Pause(); err != nil {
return ErrUnknownContainerStatus
}
default:
return ErrUnknownContainerStatus
}
}
if e.Signal != nil {
// signal the pid1/main process of the container
processes, err := container.Processes()
if err != nil {
return err
}
if len(processes) == 0 {
return ErrProcessNotFound
}
return processes[0].Signal(e.Signal)
}
return nil
}