Ansible:如何更改 Python 版本 [英] Ansible: How to change Python Version

问题描述

尝试使用GNS3练习ansible脚本，有一个docker实例叫做网络自动化"，内置ansible.但是，它仍然使用 Python 2.7 作为解释器:

Trying to use GNS3 to practice ansible script, there is a docker instance called "Network Automation" with built-in ansible. However, it still uses Python 2.7 as the interpreter:

root@Network-Automation:~# ansible --version
ansible 2.7.11
  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/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.12 (default, Nov 12 2018, 14:36:49) [GCC 5.4.0 20160609]

我知道我可以使用ansible-playbook --version -e 'ansible_python_interpreter=/usr/bin/python3'"命令来运行 Python 版本 3 的剧本，或者我可以在剧本中指定 var:

I understand I can use "ansible-playbook --version -e 'ansible_python_interpreter=/usr/bin/python3'" command to run a playbook with Python version 3, or I can specifiy var within the playbook:

- name: Common package
  hosts: all
  gather_facts: no
  vars:
    ansible_python_interpreter: /usr/bin/python3
  roles:
    - { role: python, tags: [ init, python, common, addusers] }
...
...

但是，我想有一个永久的方法来强制 ansible 使用 Python3 版本.我怎样才能做到这一点?谢谢.

However, I would like to have a permanent way to force ansible to use Python3 version. How can I achieve this? Thanks.

推荐答案

参考 ansible 官方文档 -

Referring from the official ansible docs -

单独的 Linux 分发包可能被打包用于 Python2 或 Python3.当从发行版包运行时，您只能将 Ansible 与安装它的 Python 版本一起使用.有时发行版会提供一种安装多个 Python 版本的方法(通过单独的包或通过安装后运行的一些命令).您需要咨询您的发行版，看看这是否适用于您的情况.

Individual Linux distribution packages may be packaged for Python2 or Python3. When running from distro packages you’ll only be able to use Ansible with the Python version for which it was installed. Sometimes distros will provide a means of installing for several Python versions (via a separate package or via some commands that are run after install). You’ll need to check with your distro to see if that applies in your case.

在 Python 3 下运行/usr/bin/ansible 的最简单方法是使用 Python3 版本的 pip 安装它.这将使默认的/usr/bin/ansible 与 Python3 一起运行:

The easiest way to run /usr/bin/ansible under Python 3 is to install it with the Python3 version of pip. This will make the default /usr/bin/ansible run with Python3:

$ pip3 install ansible
$ ansible --version | grep "python version"
  python version = 3.6.2 (default, Sep 22 2017, 08:28:09) [GCC 7.2.1 20170915 (Red Hat 7.2.1-2)]

如果您正在运行 Ansible Running From Source 并希望在源代码检出中使用 Python 3，请通过 python3 运行您的命令.例如:

If you are running Ansible Running From Source and want to use Python 3 with your source checkout, run your command via python3. For example:

$ source ./hacking/env-setup
$ python3 $(which ansible) localhost -m ping
$ python3 $(which ansible-playbook) sample-playbook.yml

这篇关于Ansible:如何更改 Python 版本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！