Hacktoberfest 2026：維護者為十月標記出來的 issue，仍然開放、適合新手。 瀏覽 Hacktoberfest issue

exec command is parsing output if output looks like json

未關閉
  • 哪裡不對？
#1,032 21 則留言 3 個 reaction 已指派 0 人 在 GitHub 檢視

維護者通常 1 天內回覆

還沒有人認領這個 Issue。

評估

難度
3/5
預估耗時
1-2 天
新手友好度
35/100
Issue 類型
缺陷
描述清晰度
基本清楚
活躍度
停滯
技術堆疊
kubernetes, python
領域
api

研究方向

從與 connect_get_namespaced_pod_exec 一起使用的串流入口點開始，然後檢查報告中提到的 WSResponse 類別和 _preload_content 路徑。重現兩個 echo 命令並比較回傳的值；完成的標準是命令輸出能夠一致地回傳，因此無需特殊處理即可將 JSON 輸出傳遞給 json.loads。

由索引模型根據 Issue 內容生成。

描述

kind/bug lifecycle/frozen

What happened (please include outputs or screenshots):

Working on creating a scale test where the test orchestrator will exec in each pod and run a curl command to verify the pod is in the expected state. The output of the curl is JSON.

The problem seems to be that the stream client will parse the json as a python dictionary if the output is only json, but return it to the caller as a stringified dictionary. Expecting json, json.loads is failing.

To verify I ran

In [5]: cmd=["echo", '{"example":"json", "with":null, "and":true}']

In [6]: kstream.stream(api_instance.connect_get_namespaced_pod_exec,
   ...:                   name=pod,
   ...:                   namespace=ns,
   ...:                   container=container,
   ...:                   command=cmd,
   ...:                   stderr=True,
   ...:                   stdin=False,
   ...:                   tty=False,
   ...:                   stdout=True)
Out[6]: "{'example': 'json', 'with': None, 'and': True}"

In [7]: cmd=["echo", 'but not actually json {"example":"json", "with":null, "and":true}']

In [8]: kstream.stream(api_instance.connect_get_namespaced_pod_exec,
   ...:                   name=pod,
   ...:                   namespace=ns,
   ...:                   container=container,
   ...:                   command=cmd,
   ...:                   stderr=True,
   ...:                   stdin=False,
   ...:                   tty=False,
   ...:                   stdout=True)
Out[8]: 'but not actually json {"example":"json", "with":null, "and":true}\n'

What you expected to happen:

I really did not expect the response to be different depending on the output of the command being run.

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

We are able to get around the issue by adding _preload_content=False to the stream function call and handling waiting for the response and reading stdout/stderr ourselves.

I wasn't sure where the rogue json parsing is happening, maybe in WSResponse class?

Environment:

  • Kubernetes version (kubectl version):
Client Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.6", GitCommit:"7015f71e75f670eb9e7ebd4b5749639d42e20079", GitTreeState:"clean", BuildDate:"2019-11-19T15:41:24Z", GoVersion:"go1.12.13", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"14+", GitVersion:"v1.14.8-eks-b8860f", GitCommit:"b8860f6c40640897e52c143f1b9f011a503d6e46", GitTreeState:"clean", BuildDate:"2019-11-25T00:55:38Z", GoVersion:"go1.12.10", Compiler:"gc", Platform:"linux/amd64"}
  • OS (e.g., MacOS 10.13.6):
    Ubuntu 19.10
  • Python version (python --version)
python 3.7.5
  • Python client version (pip list | grep kubernetes)
kubernetes==10.0.1
主要語言
Python
星號
7.7k
分支
3.5k
平均合併
1 天 5 小時
30 天內合併 PR
23

環境準備

從這裡開始

  1. 先讀完整個 Issue，再讀專案的貢獻指南。
  2. 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
  3. Fork 儲存庫，在一個分支上完成修改。
  4. 送出 Pull Request，並在描述裡引用這個 Issue 編號。

kubernetes-client/python 的其他 Issue

查看 kubernetes-client/python 的全部 Issue

相似的 Issue

更多 Python Issue

把新 issue 寄到你的電子郵件信箱

精選適合新手參與的 GitHub issue 摘要。