Ansible -- 如何升级 Ansible 的版本

ansible --version
ansible 2.7.5
  config file = None
  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-2.7.5-py2.7.egg/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.5 (default, Apr 17 2018, 12:51:05) [GCC 4.9.3 20150626 (NeoKylin 4.9.3-5)]

如原本是 2.7.5 版本，现在想升级到 2.9.1

登录 https://pypi.org/project/ansible/2.9.1/#files。下载 ansible-2.9.1.tar.gz，并解压。然后进入第一层目录，找到 setup.py 脚本，直接执行

cd /tmp/ansible-2.9.1
python setup.py install