Aasible中cryptography兼容性报错解决办法

Aasible中cryptography兼容性报错解决办法

1 Ansible中使用ansible --version查看版本，报错信息如下：

ERROR! Unexpected Exception, this is probably a bug: (cryptography 0.8.2 (/usr/lib64/python2.7/site-packages), Requirement.parse('cryptography>=1.1'))
the full traceback was:

Traceback (most recent call last):
  File "/usr/bin/ansible", line 97, in <module>
    mycli = getattr(__import__("ansible.cli.%s" % sub, fromlist=[myclass]), myclass)
  File "/usr/lib/python2.7/site-packages/ansible/cli/__init__.py", line 38, in <module>
    from ansible.inventory.manager import InventoryManager
  File "/usr/lib/python2.7/site-packages/ansible/inventory/manager.py", line 33, in <module>
    from ansible.plugins.loader import inventory_loader
  File "/usr/lib/python2.7/site-packages/ansible/plugins/loader.py", line 22, in <module>
    from ansible.parsing.utils.yaml import from_yaml
  File "/usr/lib/python2.7/site-packages/ansible/parsing/utils/yaml.py", line 17, in <module>
    from ansible.parsing.yaml.loader import AnsibleLoader
  File "/usr/lib/python2.7/site-packages/ansible/parsing/yaml/loader.py", line 30, in <module>
    from ansible.parsing.yaml.constructor import AnsibleConstructor
  File "/usr/lib/python2.7/site-packages/ansible/parsing/yaml/constructor.py", line 29, in <module>
    from ansible.parsing.vault import VaultLib
  File "/usr/lib/python2.7/site-packages/ansible/parsing/vault/__init__.py", line 45, in <module>
    from cryptography.hazmat.backends import default_backend
  File "/usr/lib64/python2.7/site-packages/cryptography/hazmat/backends/__init__.py", line 7, in <module>
    import pkg_resources
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 3011, in <module>
    parse_requirements(__requires__), Environment()
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 630, in resolve
    raise VersionConflict(dist,req) # XXX put more info here
VersionConflict: (cryptography 0.8.2 (/usr/lib64/python2.7/site-packages), Requirement.parse('cryptography>=1.1'))

2 分析报错原因：

最后一句Requirement.parse('cryptography>=1.1'))，得知cryptography的版本过低，需要升级，安装cryptography需要通过pip安装，所以需要先安装pip。

3 pip安装

下载：wget https://files.pythonhosted.org/packages/69/81/52b68d0a4de760a2f1979b0931ba7889202f302072cc7a0d614211bc7579/pip-18.0.tar.gz
解压：tar -zxvf pip-18.0.tar.gz
进入目录：cd pip-18.0
安装：python setup.py install

4 安装wheel

下载：wget https://files.pythonhosted.org/packages/2a/fb/aefe5d5dbc3f4fe1e815bcdb05cbaab19744d201bbc9b59cfa06ec7fc789/wheel-0.31.1.tar.gz
解压：tar -zxvf wheel-0.31.1.tar.gz
进入目录：cd wheel-0.31.1/
安装：python setup.py install

5 安装cryptography

下载：wget https://files.pythonhosted.org/packages/87/e6/915a482dbfef98bbdce6be1e31825f591fc67038d4ee09864c1d2c3db371/cryptography-2.3.1-cp27-cp27mu-manylinux1_x86_64.whl
安装：pip install cryptography-2.3.1-cp27-cp27mu-manylinux1_x86_64.whl

6. 测试是否还有问题

[root@123]# ansible --version
ansible 2.6.1
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.5 (default, Nov 20 2015, 02:00:19) [GCC 4.8.5 20150623 (Red Hat 4.8.5-4)]