86 lines
2.9 KiB
Go
86 lines
2.9 KiB
Go
/*
|
|
Copyright 2017 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package server
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
|
|
"github.com/containerd/containerd"
|
|
"github.com/golang/glog"
|
|
"golang.org/x/net/context"
|
|
"k8s.io/client-go/tools/remotecommand"
|
|
"k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime"
|
|
)
|
|
|
|
// Attach prepares a streaming endpoint to attach to a running container, and returns the address.
|
|
func (c *criContainerdService) Attach(ctx context.Context, r *runtime.AttachRequest) (retRes *runtime.AttachResponse, retErr error) {
|
|
glog.V(2).Infof("Attach for %q with tty %v and stdin %v", r.GetContainerId(), r.GetTty(), r.GetStdin())
|
|
defer func() {
|
|
if retErr == nil {
|
|
glog.V(2).Infof("Attach for %q returns URL %q", r.GetContainerId(), retRes.Url)
|
|
}
|
|
}()
|
|
|
|
cntr, err := c.containerStore.Get(r.GetContainerId())
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to find container in store: %v", err)
|
|
}
|
|
state := cntr.Status.Get().State()
|
|
if state != runtime.ContainerState_CONTAINER_RUNNING {
|
|
return nil, fmt.Errorf("container is in %s state", criContainerStateToString(state))
|
|
}
|
|
return c.streamServer.GetAttach(r)
|
|
}
|
|
|
|
func (c *criContainerdService) attachContainer(ctx context.Context, id string, stdin io.Reader, stdout, stderr io.WriteCloser,
|
|
tty bool, resize <-chan remotecommand.TerminalSize) error {
|
|
// Get container from our container store.
|
|
cntr, err := c.containerStore.Get(id)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to find container in store: %v", err)
|
|
}
|
|
id = cntr.ID
|
|
|
|
state := cntr.Status.Get().State()
|
|
if state != runtime.ContainerState_CONTAINER_RUNNING {
|
|
return fmt.Errorf("container is in %s state", criContainerStateToString(state))
|
|
}
|
|
|
|
task, err := cntr.Container.Task(ctx, nil)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to load task: %v", err)
|
|
}
|
|
handleResizing(resize, func(size remotecommand.TerminalSize) {
|
|
if err := task.Resize(ctx, uint32(size.Width), uint32(size.Height)); err != nil {
|
|
glog.Errorf("Failed to resize task %q console: %v", id, err)
|
|
}
|
|
})
|
|
|
|
// TODO(random-liu): Figure out whether we need to support historical output.
|
|
if err := cntr.IO.Attach(stdin, stdout, stderr); err != nil {
|
|
return fmt.Errorf("failed to attach container: %v", err)
|
|
}
|
|
|
|
// Close stdin after first attach if StdinOnce is specified, otherwise stdin will
|
|
// be kept open until container exits.
|
|
if cntr.Config.StdinOnce {
|
|
task.CloseIO(ctx, containerd.WithStdinCloser)
|
|
}
|
|
return nil
|
|
}
|