getPodlog无法获取stdout输出

[lvelvis]

修改成下面这也才可以获取到
`package controllers

import (
"bytes"
"encoding/json"
"fmt"
"io"

"github.com/astaxie/beego"
core_v1 "k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"

)

type GetPodLog struct {
beego.Controller
}

type PodInfo struct {
Podns string json:"podns"
Podapp string json:"podapp"
//ContainerName string json:"containername"
}

func (c *GetPodLog) PodLog() {
var (
clientset *kubernetes.Clientset
//tailLines int64
req *rest.Request
//res rest.Result
//logs []byte
err error
)

podinfo := PodInfo{}
data := c.Ctx.Input.RequestBody
//json数据封装到user对象中
err = json.Unmarshal(data, &podinfo)
if err != nil {
	fmt.Println("传入正确的JSON格式, err:", err.Error())
}

podns := podinfo.Podns
podapp := podinfo.Podapp
//containername := podinfo.ContainerName

// 初始化k8s客户端
if clientset, err = InitClient(); err != nil {
	fmt.Println(err.Error())
}

// 生成获取POD日志请求
req = clientset.CoreV1().Pods(podns).GetLogs(podapp, &core_v1.PodLogOptions{})

// req.Stream()也可以实现Do的效果
podLogs, err := req.Stream()
if err != nil {
	fmt.Println("error in opening stream")
	return
}
defer podLogs.Close()
// 发送请求
buf := new(bytes.Buffer)
_, err = io.Copy(buf, podLogs)
if err != nil {
	fmt.Println("error in copy information from podLogs to buf")
	return
}
str := buf.String()

fmt.Printf("容器-%s\tstdout日志：\n%s", podapp, str)

c.Data["Email"] = str
c.TplName = "test.html"
c.Ctx.WriteString(str)

}
`