mirror of
https://github.com/k3s-io/k3s.git
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107 lines
2.4 KiB
Go
107 lines
2.4 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package crictl
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import (
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"fmt"
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"net/url"
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"github.com/sirupsen/logrus"
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"github.com/urfave/cli"
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"golang.org/x/net/context"
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pb "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
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)
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var runtimeAttachCommand = cli.Command{
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Name: "attach",
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Usage: "Attach to a running container",
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ArgsUsage: "CONTAINER-ID",
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SkipArgReorder: true,
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UseShortOptionHandling: true,
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Flags: []cli.Flag{
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cli.BoolFlag{
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Name: "tty,t",
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Usage: "Allocate a pseudo-TTY",
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},
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cli.BoolFlag{
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Name: "stdin,i",
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Usage: "Keep STDIN open",
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},
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},
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Action: func(context *cli.Context) error {
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id := context.Args().First()
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if id == "" {
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return cli.ShowSubcommandHelp(context)
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}
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if err := getRuntimeClient(context); err != nil {
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return err
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}
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var opts = attachOptions{
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id: id,
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tty: context.Bool("tty"),
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stdin: context.Bool("stdin"),
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}
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err := Attach(runtimeClient, opts)
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if err != nil {
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return fmt.Errorf("attaching running container failed: %v", err)
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}
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return nil
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},
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After: closeConnection,
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}
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// Attach sends an AttachRequest to server, and parses the returned AttachResponse
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func Attach(client pb.RuntimeServiceClient, opts attachOptions) error {
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if opts.id == "" {
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return fmt.Errorf("ID cannot be empty")
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}
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request := &pb.AttachRequest{
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ContainerId: opts.id,
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Tty: opts.tty,
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Stdin: opts.stdin,
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Stdout: true,
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Stderr: !opts.tty,
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}
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logrus.Debugf("AttachRequest: %v", request)
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r, err := client.Attach(context.Background(), request)
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logrus.Debugf("AttachResponse: %v", r)
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if err != nil {
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return err
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}
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attachURL := r.Url
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URL, err := url.Parse(attachURL)
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if err != nil {
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return err
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}
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if URL.Host == "" {
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URL.Host = kubeletURLHost
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}
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if URL.Scheme == "" {
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URL.Scheme = kubeletURLSchema
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}
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logrus.Debugf("Attach URL: %v", URL)
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return stream(opts.stdin, opts.tty, URL)
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}
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