/
terminal.go
162 lines (152 loc) · 4.41 KB
/
terminal.go
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package impl
import (
"encoding/json"
"github.com/docker/docker/pkg/term"
"github.com/open-kingfisher/king-utils/common"
"github.com/open-kingfisher/king-utils/common/access"
"github.com/open-kingfisher/king-utils/common/log"
"github.com/open-kingfisher/king-utils/db"
"github.com/open-kingfisher/king-utils/interrupt"
"github.com/open-kingfisher/king-utils/kit"
"golang.org/x/net/websocket"
"k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/tools/remotecommand"
"net/http"
"os"
)
type terminalSize struct {
conn *websocket.Conn
sizeChan chan *remotecommand.TerminalSize
}
func (t terminalSize) Read(p []byte) (int, error) {
var reply string
var msg map[string]uint16
if err := websocket.Message.Receive(t.conn, &reply); err != nil {
return 0, err
}
if err := json.Unmarshal([]byte(reply), &msg); err != nil {
return copy(p, reply), nil
} else {
t.sizeChan <- &remotecommand.TerminalSize{
Width: msg["cols"],
Height: msg["rows"],
}
return 0, nil
}
}
func (t *terminalSize) Next() *remotecommand.TerminalSize {
size := <-t.sizeChan
log.Info("terminal size to width: %s height: %s", size.Width, size.Height)
return size
}
func Terminal(ws *websocket.Conn) {
defer func() {
ws.Close()
if err := recover(); err != nil {
log.Errorf("Terminal panic: %s", err)
}
}()
c := ws.Request()
ws.PayloadType = websocket.BinaryFrame // TextFrame 文本模式改为 BinaryFrame 二进制模式,否则乱码无法正常显示
containerName := c.FormValue("containerName")
namespace := c.FormValue("namespace")
podName := c.FormValue("podName")
cluster := c.FormValue("cluster")
clientSet, err := access.Access(cluster)
if err != nil {
log.Errorf("Client set error: %v", err)
}
config, err := getConfig(cluster)
if err != nil {
log.Errorf("Get config error: %v", err)
}
if err := Handler(ws, namespace, podName, containerName, "/bin/sh", config, clientSet); err != nil {
err := Handler(ws, namespace, podName, containerName, "/bin/bash", config, clientSet)
if err != nil {
log.Error("Handler /bin/bash: ", err)
}
}
//err = Handler(ws, namespace, podName, containerName, "exit", config, clientSet)
}
func getConfig(clusterId string) (*restclient.Config, error) {
cluster := common.ClusterDB{}
if err := db.GetById(common.Cluster, clusterId, &cluster); err != nil {
return nil, err
}
kubeconfig := common.KubeConfigPath + cluster.Id
// 判断配置文件是否存在,存在不在创建
if kit.IsExist(kubeconfig) == false {
// 从数据库中读取kubeconfig内容创建kubeconfig配置文件
if err := kit.CreateConfig(cluster, kubeconfig); err != nil {
return nil, err
}
}
config, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
if err != nil {
return nil, err
} else {
return config, nil
}
}
func Handler(ws *websocket.Conn, namespace, podname, container, cmd string, config *restclient.Config, clientSet *kubernetes.Clientset) error {
fn := func() error {
req := clientSet.CoreV1().RESTClient().Post().
Resource("pods").
Name(podname).
Namespace(namespace).
SubResource("exec")
//Param("container", container).
//Param("stdin", "true").
//Param("stdout", "true").
//Param("stderr", "true").
//Param("command", cmd).Param("tty", "true")
c := make(chan *remotecommand.TerminalSize)
t := &terminalSize{ws, c}
req.VersionedParams(
&v1.PodExecOptions{
Container: container,
Command: []string{cmd},
Stdin: true,
Stdout: true,
Stderr: true,
TTY: true,
},
scheme.ParameterCodec,
)
executor, err := remotecommand.NewSPDYExecutor(
config, http.MethodPost, req.URL(),
)
if err != nil {
return err
}
return executor.Stream(remotecommand.StreamOptions{
Stdin: t,
Stdout: ws,
Stderr: ws,
Tty: true,
TerminalSizeQueue: t,
})
}
inFd, isTerminal := term.GetFdInfo(ws)
if !isTerminal {
if f, err := os.Open("/dev/tty"); err == nil {
defer f.Close()
inFd = f.Fd()
isTerminal = term.IsTerminal(inFd)
}
log.Info("isTerminal: ", isTerminal)
}
state, err := term.SaveState(inFd)
if err != nil {
log.Error("Terminal save state error: ", err)
}
return interrupt.Chain(nil, func() {
if err := term.RestoreTerminal(inFd, state); err != nil {
log.Error("RestoreTerminal error: ", err)
}
}).Run(fn)
}