在python云堆栈模块中调试ansible跟踪以查找可能的错误

对于用于上载ssh密钥的Ansible任务，请考虑以下问题：

  File "/home/foo/.ansible/tmp/ansible-tmp-1539175437.69-201636907966313/AnsiballZ_cs_sshkeypair.py", line 113, in <module>
    _ansiballz_main()
  File "/home/foo/.ansible/tmp/ansible-tmp-1539175437.69-201636907966313/AnsiballZ_cs_sshkeypair.py", line 105, in _ansiballz_main
    invoke_module(zipped_mod, temp_path, ANSIBALLZ_PARAMS)
  File "/home/foo/.ansible/tmp/ansible-tmp-1539175437.69-201636907966313/AnsiballZ_cs_sshkeypair.py", line 48, in invoke_module
    imp.load_module('__main__', mod, module, MOD_DESC)
  File "/tmp/ansible_cs_sshkeypair_payload_Jb1ZG5/__main__.py", line 267, in <module>
  File "/tmp/ansible_cs_sshkeypair_payload_Jb1ZG5/__main__.py", line 258, in main
  File "/tmp/ansible_cs_sshkeypair_payload_Jb1ZG5/__main__.py", line 133, in register_ssh_key
  File "/tmp/ansible_cs_sshkeypair_payload_Jb1ZG5/__main__.py", line 211, in get_ssh_key
  File "/tmp/ansible_cs_sshkeypair_payload_Jb1ZG5/__main__.py", line 227, in _get_ssh_fingerprint
  File "/usr/local/lib/python2.7/dist-packages/sshpubkeys/keys.py", line 157, in hash_md5
    fp_plain = hashlib.md5(self._decoded_key).hexdigest()
TypeError: md5() argument 1 must be string or buffer, not None

fatal: [localhost]: FAILED! => {
    "changed": false, 
    "module_stderr": "Traceback (most recent call last):\n  File \"/home/foo/.ansible/tmp/ansible-tmp-1539175437.69-201636907966313/AnsiballZ_cs_sshkeypair.py\", line 113, in <module>\n    _ansiballz_main()\n  File \"/home/foo/.ansible/tmp/ansible-tmp-1539175437.69-201636907966313/AnsiballZ_cs_sshkeypair.py\", line 105, in _ansiballz_main\n    invoke_module(zipped_mod, temp_path, ANSIBALLZ_PARAMS)\n  File \"/home/foo/.ansible/tmp/ansible-tmp-1539175437.69-201636907966313/AnsiballZ_cs_sshkeypair.py\", line 48, in invoke_module\n    imp.load_module('__main__', mod, module, MOD_DESC)\n  File \"/tmp/ansible_cs_sshkeypair_payload_Jb1ZG5/__main__.py\", line 267, in <module>\n  File \"/tmp/ansible_cs_sshkeypair_payload_Jb1ZG5/__main__.py\", line 258, in main\n  File \"/tmp/ansible_cs_sshkeypair_payload_Jb1ZG5/__main__.py\", line 133, in register_ssh_key\n  File \"/tmp/ansible_cs_sshkeypair_payload_Jb1ZG5/__main__.py\", line 211, in get_ssh_key\n  File \"/tmp/ansible_cs_sshkeypair_payload_Jb1ZG5/__main__.py\", line 227, in _get_ssh_fingerprint\n  File \"/usr/local/lib/python2.7/dist-packages/sshpubkeys/keys.py\", line 157, in hash_md5\n    fp_plain = hashlib.md5(self._decoded_key).hexdigest()\nTypeError: md5() argument 1 must be string or buffer, not None\n", 
    "module_stdout": "", 
    "msg": "MODULE FAILURE\nSee stdout/stderr for the exact error", 
    "rc": 1
}

Ubuntu 18.04 LTS，Python 3

FROM ubuntu:18.04

ENV WORKDIR /work
WORKDIR $WORKDIR
COPY . $WORKDIR/example/


RUN mv example/.ssh/ ~/ && ls -alh ~/.ssh/ && \
    apt-get -y update && apt-get -y install software-properties-common && apt-add-repository ppa:ansible/ansible && \
    apt-get -y update && \
    apt-get -y install python3-pip && pip3 install ansible cs sshpubkeys && \
    echo "List installed Python packages:" && pip3 list && python3 --version && ansible --version

系统似乎删除了临时生成的Python脚本。是否有保留它们以供调试的选项

旁注：

example/.ssh/

包含目标系统未知的新ssh密钥

---

假设：虽然最终的动态文件名为

AnsiballZ_cs_sshkeypair.py

，但它是否来自Python

cs

（Apache云堆栈绑定）模块？

临时脚本默认情况下将被删除，因为它们基本上只是从Ansible主机传输的模块文件（包装成AnsiballZ）的副本。在这种情况下，我猜远程主机与Ansible主机相同，但这并不重要，因为概念是相同的。ansiballz包装模块的命名方案与您假设的基本相同

但实际上，您可以通过将

ANSIBLE\u KEEP\u REMOTE\u FILES=1

预先添加到playbook调用来覆盖自动删除，如下所示：

ANSIBLE_KEEP_REMOTE_FILES=1 ansible-playbook <playbookname>.yml -vvv

设置开发环境。然后，您可以使用Python解释器直接调用该模块，并使用pdb等工具。我建议您准备以下格式的json文件

{"ANSIBLE_MODULE_ARGS": { "key1": "value1", "key2"... }}

然后，您应该能够像这样调用模块：

python <module-name-plus-path> <json-file-plus-path>

python

我希望有帮助

---

编辑：我忘了一件事。看看这本书。如果你真的想深入了解这件事，这将对你有很大帮助。

谢谢@kb-0！这是一个非常有用的反馈。此级别的Ansible洞察无法在当前项目中实施。。。奇怪的是，每次运行“重做”步骤时都会生成文件/root/.ansible/tmp/ansible-tmp-1540197991.746526-125643635688315/AnsiballZ_cs_instance.py。是否有一个选项可以禁用临时文件的时间戳，以便我可以插入断点？不幸的是，Ansiballz包装捕获pdb stacktraces，并且总是失败，并使用BDBguit（）表示包装关闭调试外壳，然后返回module.fail_json（）。当我在开发自定义模块时忘记了代码中的跟踪信息时，有好几次我都感到很沮丧。使用pdb之类的东西的唯一方法（据我所知）是通过本机Python调用模块。

{"ANSIBLE_MODULE_ARGS": { "key1": "value1", "key2"... }}

python <module-name-plus-path> <json-file-plus-path>