编写自定义 Ansible 模块时 bool 类型的实现错误

Question

我正在尝试在 Ansible 2.3 中编写自定义模块以在我的剧本中使用。它的详细信息已被抽象为运行下面的最小 date 命令，但我正在开发一个非常复杂的示例。

[dev@foobar Gist]$ tree ansible_version_err/
ansible_version_err/
├── dev_command.yml
└── library
    └── dev_command.py

库文件的内容是使用ansible.module包来实现自定义命令。

#!/usr/bin/python

from ansible.module_utils.basic import *
from subprocess import Popen, PIPE

import time

if __name__ == '__main__':
    module = AnsibleModule(
        argument_spec={
            'command': { 'type':'str', 'required': True },
            'print_elapsed': {  'type':bool, 'required': False },
            'print_time': { 'type':bool, 'required': False } } )

    stdout = None
    stderr = None
    rc = None

    try:
        time_start = time.time()
        proc = Popen( module.params['command'], shell = True)
        stdout, stderr = proc.communicate()
        time_end = time.time()
        rc = proc.returncode

        if rc != 0:
            raise Exception("error while obtaining date")

        time_elapsed = time_end - time_start

        if 'print_elapsed' in module.params and module.params['print_elapsed']:
            stdout = stdout + "\nelapsed time: " + str(time_elapsed)

        if 'print_time' in module.params and module.params['print_time']:
            stdout = stderr + "\ntime: " + time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime(time_start))

        module.exit_json( changed = False, stdout = stdout, stderr = stderr, rc = rc, time_elapsed = time_elapsed  )

    except Exception:
        pass

并且使用此 dev_command 的 .yml 文件称为

---
- hosts: localhost
  gather_facts: no
  tasks:
  - name: testing a custom command
    vars:
      print_stdout: True
    dev_command: command="{{cmd}}" print_elapsed=True print_time=True

我只是用 date 调用 cmd，它将继续，运行日期命令。

ansible-playbook dev_command.yml -vvv -e "cmd=date"

虽然我希望这项工作可以在 Ansible 2.3 上运行，但它向我抛出一个错误

fatal: [localhost]: FAILED! => {
    "changed": false, 
    "failed": true, 
    "invocation": {
        "module_args": {
            "command": "date", 
            "print_elapsed": "True", 
            "print_time": "True"
        }
    }, 
    "msg": "implementation error: unknown type <type 'bool'> requested for print_time"
}

此错误在 v2.6 中未出现。为什么会这样？这是一个已知的 Ansible 功能错误吗，只能通过移动到更新版本来解决。版本详情

$ ansible --version
ansible 2.3.0.0
  config file = /etc/ansible/ansible.cfg
  configured module search path = Default w/o overrides
  python version = 2.7.5 (default, Nov  6 2016, 00:28:07) [GCC 4.8.5 20150623 (Red Hat 4.8.5-11)]

Answer 1

Q: "On Ansible 2.3, it is throwing me an error ... This error is not seen in v2.6. Why is this happening? Is this a known Ansible feature bug that can only be resolved by moving to a newer version?"

答：是的。有必要移动到维护版本。即使这是一个已知问题，也不会再修复。 Ansible Release cycle 说：

"Ansible has a graduated maintenance structure that extends to three major releases ... we strongly encourage you to upgrade as soon as possible ..."

目前最新的Ansible版本是2.9。目前最后维护的版本是2.7。

FWIW。命令

$ grep -r type /scratch/ansible/lib/ansible/modules/ | grep bool | grep defaul

显示所有模块用引号声明布尔类型

type='bool'

或

'type': 'bool'

编写自定义 Ansible 模块时 bool 类型的实现错误

Implementation error for type bool when writing custom Ansible module

ansible

ansible-2.x