改变Ansible_Python_Interpreter的问题

Question

如何更改Ubuntu上的翻译员值？

我从tar下载并安装了Python2.7.12，现在默认情况下它在Ansible之外运行

# which python
/usr/local/bin/python

#python --version
Python 2.7.12

但是当我试图设置变量时，Ansible显示它仍然在使用新版本的Python (我需要使用这个旧版本来测试)

# ansible-playbook --version -e "ansible_python_interpreter=/usr/local/bin/python"

ansible-playbook 2.5.1
  config file = /home/fortinet/Downloads/ansible/playbooks/complete_provisioning/ansible.cfg
  configured module search path = [u'/home/fortinet/Downloads/ansible/modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible-playbook
  python version = 2.7.15rc1 (default, Nov 12 2018, 14:31:15) [GCC 7.3.0]
root@ubuntu18:/home/fortinet/Downloads/ansible/playbooks/complete_provisioning#

Answer 1

不可能配置Ansible在控制器上使用的Python版本。

翻译员配置参数将设置：

用于在远程目标上执行模块的Python解释器的路径

Python在控制器上的版本取决于如何构建Ansible。例如

• Ubuntu 18.04使用Python2.x

shell> grep DISTRIB_DESCRIPTION /etc/lsb-release
DISTRIB_DESCRIPTION="Ubuntu 18.04.4 LTS"

shell> dpkg -l | grep ansible
ii  ansible                                2.9.6-1ppa~bionic

shell> ansible --version
ansible 2.9.6
  config file = /home/admin/.ansible.cfg
  configured module search path = [u'/home/admin/.ansible/my_modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.17 (default, Nov  7 2019, 10:07:09) [GCC 7.4.0]

• Ubuntu 20.04使用Python3.x

shell> grep DISTRIB_DESCRIPTION /etc/lsb-release
DISTRIB_DESCRIPTION="Ubuntu 20.04 LTS"

shell> dpkg -l | grep ansible
ii  ansible                               2.9.6+dfsg-1

shell> ansible --version
ansible 2.9.6
  config file = /home/admin/.ansible.cfg
  configured module search path = ['/home/admin/.ansible/my_modules']
  ansible python module location = /usr/lib/python3/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 3.8.2 (default, Apr 27 2020, 15:53:34) [GCC 9.3.0]

Answer 2

ansible_python_interpreter控制在目标机器上使用的python版本。

在我的ubuntu18.04机器(用作目标的本地主机)上，默认使用python3，但我可以切换到python2.7：

$ ansible localhost -m setup -a filter=ansible_python_version
localhost | SUCCESS => {
    "ansible_facts": {
        "ansible_python_version": "3.6.9"
    },
    "changed": false
}
$ ansible localhost -m setup -e ansible_python_interpreter=/usr/bin/python -a filter=ansible_python_version
localhost | SUCCESS => {
    "ansible_facts": {
        "ansible_python_version": "2.7.17"
    },
    "changed": false
}

现在，上面的示例显示了ansible在控制器上使用的python版本。如果要更改该版本，则必须在要使用的特定版本的python中重新安装ansible。这实际上取决于您如何安装ansible (rpm，deb，pip，从源.)。基本上，从python2.7到python3.x，在用pip安装时：

pip uninstall ansible
pip3 install ansible