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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| /* | ||
| Copyright 2024 Juicedata Inc | ||
| 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 resource | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "io" | ||
|
|
||
| "golang.org/x/net/websocket" | ||
| corev1 "k8s.io/api/core/v1" | ||
| "k8s.io/client-go/kubernetes" | ||
| "k8s.io/client-go/kubernetes/scheme" | ||
| "k8s.io/client-go/rest" | ||
| "k8s.io/client-go/tools/remotecommand" | ||
| "k8s.io/klog" | ||
| ) | ||
|
|
||
| const ( | ||
| EndOfTransmissionCTRLD = "\u0004" | ||
| EndOfTransmissionCTRLC = "\u0003" | ||
| ) | ||
|
|
||
| type terminalSession struct { | ||
| conn *websocket.Conn | ||
| sizeCh chan *remotecommand.TerminalSize | ||
| endOfTransmission string | ||
| } | ||
|
|
||
| func NewTerminalSession(conn *websocket.Conn, endOfTransmission string) *terminalSession { | ||
| return &terminalSession{ | ||
| conn: conn, | ||
| sizeCh: make(chan *remotecommand.TerminalSize), | ||
| endOfTransmission: endOfTransmission, | ||
| } | ||
| } | ||
|
|
||
| func (t *terminalSession) Write(p []byte) (int, error) { | ||
| err := websocket.Message.Send(t.conn, string(p)) | ||
| return len(p), err | ||
| } | ||
|
|
||
| func (t *terminalSession) Read(p []byte) (int, error) { | ||
| var msgStr []byte | ||
| var msg struct { | ||
| Rows uint16 `json:"rows"` | ||
| Cols uint16 `json:"cols"` | ||
| Data string `json:"data"` | ||
| Type string `json:"type"` | ||
| } | ||
| err := websocket.Message.Receive(t.conn, &msgStr) | ||
| if err != nil { | ||
| return copy(p, t.endOfTransmission), err | ||
| } | ||
| if err := json.Unmarshal(msgStr, &msg); err != nil { | ||
| return copy(p, t.endOfTransmission), nil | ||
| } | ||
| switch msg.Type { | ||
| case "stdin": | ||
| return copy(p, []byte(msg.Data)), nil | ||
| case "resize": | ||
| select { | ||
| case t.sizeCh <- &remotecommand.TerminalSize{ | ||
| Width: msg.Cols, | ||
| Height: msg.Rows, | ||
| }: | ||
| default: | ||
| } | ||
| default: | ||
| return copy(p, t.endOfTransmission), nil | ||
| } | ||
| return 0, nil | ||
| } | ||
|
|
||
| func (t *terminalSession) Next() *remotecommand.TerminalSize { | ||
| return <-t.sizeCh | ||
| } | ||
|
|
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| type Handler interface { | ||
| io.Reader | ||
| io.Writer | ||
| remotecommand.TerminalSizeQueue | ||
| } | ||
|
|
||
| func ExecInPod(client kubernetes.Interface, cfg *rest.Config, h Handler, namespace, name, container string, cmd []string) error { | ||
| req := client.CoreV1().RESTClient().Post(). | ||
| Resource("pods"). | ||
| Name(name). | ||
| Namespace(namespace).SubResource("exec") | ||
| req.VersionedParams(&corev1.PodExecOptions{ | ||
| Command: cmd, | ||
| Container: container, | ||
| Stdin: true, | ||
| Stdout: true, | ||
| Stderr: true, | ||
| TTY: true, | ||
| }, scheme.ParameterCodec) | ||
|
|
||
| executor, err := remotecommand.NewSPDYExecutor(cfg, "POST", req.URL()) | ||
| if err != nil { | ||
| klog.Error("Failed to create SPDY executor: ", err) | ||
| return err | ||
| } | ||
| if err := executor.Stream(remotecommand.StreamOptions{ | ||
| Stdin: h, | ||
| Stdout: h, | ||
| Stderr: h, | ||
| TerminalSizeQueue: h, | ||
| Tty: true, | ||
| }); err != nil { | ||
| klog.Error("Failed to stream: ", err) | ||
| return err | ||
| } | ||
|
|
||
| return nil | ||
| } |