[英]example of exec in k8s's pod by using go client
I want to use k8s go client to exec command in a pod.我想使用 k8s go 客户端在 pod 中执行命令。 However I cannot find any example about this.但是我找不到任何关于这个的例子。 So I read kubectl exec
source code, and write code as below.所以我阅读kubectl exec
源代码,并编写了如下代码。 And err = exec.Stream(sopt)
always get an error without any message.并且err = exec.Stream(sopt)
总是在没有任何消息的情况下出现错误。 Can anyone tell me how to debug this problem, or give me a correct example.谁能告诉我如何调试这个问题,或者给我一个正确的例子。
config := &restclient.Config{
Host: "http://192.168.8.175:8080",
Insecure: true,
}
config.ContentConfig.GroupVersion = &api.Unversioned
config.ContentConfig.NegotiatedSerializer = api.Codecs
restClient, err := restclient.RESTClientFor(config)
if err != nil {
panic(err.Error())
}
req := restClient.Post().Resource("pods").Name("wordpress-mysql-213049546-29s7d").Namespace("default").SubResource("exec").Param("container", "mysql")
req.VersionedParams(&api.PodExecOptions{
Container: "mysql",
Command: []string{"ls"},
Stdin: true,
Stdout: true,
}, api.ParameterCodec)
exec, err := remotecommand.NewExecutor(config, "POST", req.URL())
if err != nil {
panic(err.Error())
}
sopt := remotecommand.StreamOptions{
SupportedProtocols: remotecommandserver.SupportedStreamingProtocols,
Stdin: os.Stdin,
Stdout: os.Stdout,
Stderr: os.Stderr,
Tty: false,
}
err = exec.Stream(sopt)
if err != nil {
panic(err.Error())
}
package k8s
import (
"io"
v1 "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/remotecommand"
)
// ExecCmd exec command on specific pod and wait the command's output.
func ExecCmdExample(client kubernetes.Interface, config *restclient.Config, podName string,
command string, stdin io.Reader, stdout io.Writer, stderr io.Writer) error {
cmd := []string{
"sh",
"-c",
command,
}
req := client.CoreV1().RESTClient().Post().Resource("pods").Name(podName).
Namespace("default").SubResource("exec")
option := &v1.PodExecOptions{
Command: cmd,
Stdin: true,
Stdout: true,
Stderr: true,
TTY: true,
}
if stdin == nil {
option.Stdin = false
}
req.VersionedParams(
option,
scheme.ParameterCodec,
)
exec, err := remotecommand.NewSPDYExecutor(config, "POST", req.URL())
if err != nil {
return err
}
err = exec.Stream(remotecommand.StreamOptions{
Stdin: stdin,
Stdout: stdout,
Stderr: stderr,
})
if err != nil {
return err
}
return nil
}
It works to me.它对我有用。
你可能会感兴趣,看看e2e/framework/exec_util.go
当命令是一个以/bin/sh
开头的字符串数组时,它对我/bin/sh
:
[]string{"/bin/sh", "-c", "ls", "-ll", "."}
I faced this problem in exec
ing into the Pod using Kubernetes' Client-go
for long.我在长时间使用 Kubernetes 的Client-go
exec
Pod 时遇到了这个问题。 But finally I found a way to make it work.但最后我找到了让它工作的方法。 I have written a simple code to perform this task here in my repo.我写了一个简单的代码来执行此任务在这里我的回购协议。 I request you to check it.我请你检查一下。 I believe it will be helpful.我相信它会有所帮助。
创建请求时您会错过.CoreV1()
!
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