如何提取Kubernetes Pod命令执行结果的属性？

huangapple
go评论126阅读模式
英文:

How to extract kubernetes pod command execution result attributes

问题

我正在使用client-Go连接到pod，并且我想获取文件目录的属性。

  1. func GetPodFiles(c *gin.Context)  {
  2.     client, _ := Init.ClusterID(c)
  3.     path := c.DefaultQuery("path", "/")
  4.     cmd := []string{
  5.         "sh",
  6.         "-c",
  7.         fmt.Sprintf("ls -l %s", path),
  8.     }
  9.     config, _ := Init.ClusterCfg(c)
  10.     req := client.CoreV1().RESTClient().Post().
  11.         Resource("pods").
  12.         Name("nacos-0").
  13.         Namespace("default").SubResource("exec").Param("container", "nacos")
  14.     req.VersionedParams(
  15.         &v1.PodExecOptions{
  16.             Command: cmd,
  17.             Stdin:   false,
  18.             Stdout:  true,
  19.             Stderr:  true,
  20.             TTY:     false,
  21.         },
  22.         scheme.ParameterCodec,
  23.     )
  25.     var stdout, stderr bytes.Buffer
  26.     exec, err := remotecommand.NewSPDYExecutor(config, "POST", req.URL())
  27.     if err != nil {
  28.         response.FailWithMessage(response.InternalServerError, err.Error(), c)
  29.         return
  30.     }
  31.     err = exec.Stream(remotecommand.StreamOptions{
  32.         Stdin:  nil,
  33.         Stdout: &stdout,
  34.         Stderr: &stderr,
  35.     })
  36.     if err != nil {
  37.         response.FailWithMessage(response.InternalServerError, "Error obtaining file", c)
  38.         return
  39.     }
  41.     fmt.Println(stdout.String())
  42. }

执行结果输出

  1. total 0
  2. lrwxrwxrwx   1 root root   7 Jun  1  2018 bin -> usr/bin
  3. drwxr-xr-x   5 root root 360 Feb 16 16:39 dev
  4. lrwxrwxrwx   1 root root   8 Jun  1  2018 sbin -> usr/sbin
  5. drwxr-xr-x   2 root root   6 Apr 11  2018 srv

期望的结果

  1. "data": [
  2.         {
  3.             "perm": "drwxr-xr-x",
  4.             "mod_time": "2022-03-02 15:02:15",
  5.             "kind": "d",
  6.             "name": "temp",
  7.             "size": ""
  8.         },
  9. ]

有没有一种好的方法或者Go语言的第三方库来处理它。请告诉我。谢谢。

英文:

I am connecting to pod via client-Go and I want to get the properties of the file directory

  1. func GetPodFiles(c *gin.Context)  {
  2. 	client, _ := Init.ClusterID(c)
  3. 	path := c.DefaultQuery("path", "/")
  4. 	cmd := []string{
  5. 		"sh",
  6. 		"-c",
  7. 		fmt.Sprintf("ls -l %s", path),
  8. 	}
  9. 	config, _ := Init.ClusterCfg(c)
  10. 	req := client.CoreV1().RESTClient().Post().
  11. 		Resource("pods").
  12. 		Name("nacos-0").
  13. 		Namespace("default").SubResource("exec").Param("container", "nacos")
  14. 	req.VersionedParams(
  15. 		&v1.PodExecOptions{
  16. 			Command: cmd,
  17. 			Stdin:   false,
  18. 			Stdout:  true,
  19. 			Stderr:  true,
  20. 			TTY:     false,
  21. 		},
  22. 		scheme.ParameterCodec,
  23. 	)
  25. 	var stdout, stderr bytes.Buffer
  26. 	exec, err := remotecommand.NewSPDYExecutor(config, "POST", req.URL())
  27. 	if err != nil {
  28. 		response.FailWithMessage(response.InternalServerError, err.Error(), c)
  29. 		return
  30. 	}
  31. 	err = exec.Stream(remotecommand.StreamOptions{
  32. 		Stdin:  nil,
  33. 		Stdout: &stdout,
  34. 		Stderr: &stderr,
  35. 	})
  36. 	if err != nil {
  37. 		response.FailWithMessage(response.InternalServerError, "Error obtaining file", c)
  38. 		return
  39. 	}
  41. 	fmt.Println(stdout.String())
  42. }

Execution Result Output

  1. total 0
  2. lrwxrwxrwx   1 root root   7 Jun  1  2018 bin -> usr/bin
  3. drwxr-xr-x   5 root root 360 Feb 16 16:39 dev
  4. lrwxrwxrwx   1 root root   8 Jun  1  2018 sbin -> usr/sbin
  5. drwxr-xr-x   2 root root   6 Apr 11  2018 srv

Expect the result

  1. "data": [
  2.         {
  3.             "perm": "drwxr-xr-x",
  4.             "mod_time": "2022-03-02 15:02:15",
  5.             "kind": "d",
  6.             "name": "temp",
  7.             "size": ""
  8.         },
  9. ]

Is there a good way or a golang third-party library to handle it. Please let me know. Thank you

答案1

得分: 1

在Kubernetes pod中，您可以执行stat Linux命令，而不是ls命令。

  1. $ stat yourFileOrDirName

该命令的默认输出如下所示：

  1.   File: yourFileOrDirName
  2.   Size: 346             Blocks: 0          IO Block: 4096   directory
  3. Device: 51h/82d Inode: 40431       Links: 1
  4. Access: (0755/drwxr-xr-x)  Uid: ( 1000/ username)   Gid: ( 1000/ groupname)
  5. Access: 2022-03-02 11:59:07.384821351 +0100
  6. Modify: 2022-03-02 11:58:48.733821177 +0100
  7. Change: 2022-03-02 11:58:48.733821177 +0100
  8.  Birth: 2021-12-21 11:12:05.571841723 +0100

但是，您可以像这样调整其输出：

  1. $ stat --printf="%n,%A,%y,%s" yourFileOrDirName

其中 %n - 文件名，%A - 权限位和文件类型（以人类可读的形式），%y - 最后修改时间（人类可读），%s - 总大小（以字节为单位）。您还可以选择任何字符作为分隔符，而不是逗号。

输出将会是：

  1. yourFileOrDirName,drwxr-xr-x,2022-03-02 11:58:48.733821177 +0100,346

有关stat命令的更多信息，请参阅此处。

在获得这样的输出后，如果您确实需要，我相信您可以轻松地将其“转换”为JSON格式。

此外，您可以像这样运行stat命令：

  1. $ stat --printf="{\"data\":[{\"name\":\"%n\",\"perm\":\"%A\",\"mod_time\":\"%y\",\"size\":\"%s\"}]}" yourFileOrDirName

或者如@mdaniel建议的那样，由于该命令不包含任何shell变量，也没有'，更简洁的命令是：

  1. stat --printf='{"data":[{"name":"%n","perm":"%A","mod_time":"%y","size":"%s"}]}' yourFileOrDirName

然后获得DIY的JSON输出：

  1. {"data":[{"name":"yourFileOrDirName","perm":"drwxrwxr-x","mod_time":"2022-02-04 15:17:27.000000000 +0000","size":"4096"}]}
英文:

In a Kubernetes pod you can execute the stat linux command instead of ls command.

  1. $ stat yourFileOrDirName

The output of this command by default is like this:

  1.   File: yourFileOrDirName
  2.   Size: 346             Blocks: 0          IO Block: 4096   directory
  3. Device: 51h/82d Inode: 40431       Links: 1
  4. Access: (0755/drwxr-xr-x)  Uid: ( 1000/ username)   Gid: ( 1000/ groupname)
  5. Access: 2022-03-02 11:59:07.384821351 +0100
  6. Modify: 2022-03-02 11:58:48.733821177 +0100
  7. Change: 2022-03-02 11:58:48.733821177 +0100
  8.  Birth: 2021-12-21 11:12:05.571841723 +0100

But you can tweak its output like this:

  1. $ stat --printf="%n,%A,%y,%s" yourFileOrDirName

where %n - file name, %A - permission bits and file type in human readable form, %y - time of last data modification human-readable, %s - total size, in bytes. You can also choose any character as a delimiter instead of comma.

the output will be:

  1. yourFileOrDirName,drwxr-xr-x,2022-03-02 11:58:48.733821177 +0100,346

See more info about the stat command here.

After you get such output, I believe you can easily 'convert' it to json format if you really need it.

Furthermore, you can run the stat command like this:

  1. $ stat --printf="{\"data\":[{\"name\":\"%n\",\"perm\":\"%A\",\"mod_time\":\"%y\",\"size\":\"%s\"}]}" yourFileOrDirName

Or as @mdaniel suggested, since the command does not contain any shell variables, nor a ', the cleaner command is:

  1. stat --printf='{"data":[{"name":"%n","perm":"%A","mod_time":"%y","size":"%s"}]}' yourFileOrDirName

and get the DIY json output:

  1. {"data":[{"name":"yourFileOrDirName","perm":"drwxrwxr-x","mod_time":"2022-02-04 15:17:27.000000000 +0000","size":"4096"}]}

huangapple
  • 本文由 发表于 2022年3月3日 09:36:38
  • 转载请务必保留本文链接：https://go.coder-hub.com/71331142.html
  • go
  • kubernetes
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