Поручите Ansible использовать конкретную версию интерпретатора Python на удаленном хосте.

Удаленный хост

Удаленная операционная система.

$ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 10 (buster)
Release:        10
Codename:       buster
Интерпретаторы Python, доступные на удаленной системе.
$ ls -l /usr/bin/python*
lrwxrwxrwx 1 root root       7 Mar  4  2019 /usr/bin/python -> python2
lrwxrwxrwx 1 root root       9 Mar  4  2019 /usr/bin/python2 -> python2.7
-rwxr-xr-x 1 root root 3689352 Oct 10 22:02 /usr/bin/python2.7
lrwxrwxrwx 1 root root      33 Oct 10 22:02 /usr/bin/python2.7-config -> x86_64-linux-gnu-python2.7-config
lrwxrwxrwx 1 root root      16 Mar  4  2019 /usr/bin/python2-config -> python2.7-config
lrwxrwxrwx 1 root root       9 Mar 26  2019 /usr/bin/python3 -> python3.7
-rwxr-xr-x 2 root root 4877888 Apr  3  2019 /usr/bin/python3.7
-rwxr-xr-x 2 root root 4877888 Apr  3  2019 /usr/bin/python3.7m
lrwxrwxrwx 1 root root      10 Mar 26  2019 /usr/bin/python3m -> python3.7m
lrwxrwxrwx 1 root root      14 Mar  4  2019 /usr/bin/python-config -> python2-config

Ansible плейбук и инвентари

Пример файла python_interpreter_test_inventory.yml:

python_interpreter_test_defined:
  vars:
    ansible_python_interpreter: /usr/bin/python3
  hosts:
    debian10_python_group_defined:
      ansible_host: 192.168.50.221
    debian10_python_defined:
      ansible_host: 192.168.50.221
      ansible_python_interpreter: /usr/bin/python2
    debian10_python_auto:
      ansible_host: 192.168.50.221
      ansible_python_interpreter: auto
    debian10_python_auto_legacy:
      ansible_host: 192.168.50.221
      ansible_python_interpreter: auto_legacy
Пример файла python_interpreter_test_playbook.yml:
---
- hosts: python_interpreter_test_default, python_interpreter_test_defined
  gather_facts: yes
  serial: 1
  tasks:
    - debug: var=ansible_python_interpreter
    - debug: var=ansible_python_version

Определяем и проверяем интерпретатор Python

Я использую Ansible 2.9.2 с модификацией, примененной к INTERPRETER_PYTHON_DISTRO_MAP

INTERPRETER_PYTHON:
  name: Python interpreter path (or automatic discovery behavior) used for module execution
  default: auto_legacy
  env: [{name: ANSIBLE_PYTHON_INTERPRETER}]
  ini:
  - {key: interpreter_python, section: defaults}
  vars:
  - {name: ansible_python_interpreter}
  version_added: "2.8"
  description:
  - Path to the Python interpreter to be used for module execution on remote targets, or an automatic discovery mode.
    Supported discovery modes are ``auto``, ``auto_silent``, and ``auto_legacy`` (the default). All discovery modes
    employ a lookup table to use the included system Python (on distributions known to include one), falling back to a
    fixed ordered list of well-known Python interpreter locations if a platform-specific default is not available. The
    fallback behavior will issue a warning that the interpreter should be set explicitly (since interpreters installed
    later may change which one is used). This warning behavior can be disabled by setting ``auto_silent``. The default
    value of ``auto_legacy`` provides all the same behavior, but for backwards-compatibility with older Ansible releases
    that always defaulted to ``/usr/bin/python``, will use that interpreter if present (and issue a warning that the
    default behavior will change to that of ``auto`` in a future Ansible release.
INTERPRETER_PYTHON_DISTRO_MAP:
  name: Mapping of known included platform pythons for various Linux distros
  default:
    centos: &rhelish
      '6': /usr/bin/python
      '8': /usr/libexec/platform-python
    debian:
      '10': /usr/bin/python3
    fedora:
      '23': /usr/bin/python3
    redhat: *rhelish
    rhel: *rhelish
    ubuntu:
      '14': /usr/bin/python
      '16': /usr/bin/python3
  version_added: "2.8"
  # FUTURE: add inventory override once we're sure it can't be abused by a rogue target
  # FUTURE: add a platform layer to the map so we could use for, eg, freebsd/macos/etc?
INTERPRETER_PYTHON_FALLBACK:
  name: Ordered list of Python interpreters to check for in discovery
  default:
  - /usr/bin/python
  - python3.7
  - python3.6
  - python3.5
  - python2.7
  - python2.6
  - /usr/libexec/platform-python
  - /usr/bin/python3
  - python
  # FUTURE: add inventory override once we're sure it can't be abused by a rogue target
  version_added: "2.8"

Начиная с Ansible 2.8 значением по умолчанию ansible_python_interpreter является auto_legacy, что означает, что он предпочтет /usr/bin/python (если он существует) перед обнаруженной версией Python.

Вы можете установить его в автоматический режим, который будет использоваться по умолчанию в будущем, поэтому он будет работать противоположным образом.

Для подавления предупреждений об устаревании и отказоустойчивости используйте значения auto_legacy_silent или auto_silent.

Также можно указать путь к определенному интерпретатору Python.

Чтобы проиллюстрировать это, используйте плейбук Ansible, который был описан ранее.

$ ansible-playbook -i python_interpreter_test_inventory.yml python_interpreter_test_playbook.yml
PLAY [python_interpreter_test_default, python_interpreter_test_defined] ***********************************************************************************************************

TASK [Gathering Facts] ************************************************************************************************************************************************************
ok: [debian10_python_default]

TASK [debug] **********************************************************************************************************************************************************************
ok: [debian10_python_default] => {
    "ansible_python_interpreter": "VARIABLE IS NOT DEFINED!"
}

TASK [debug] **********************************************************************************************************************************************************************
ok: [debian10_python_default] => {
    "ansible_python_version": "2.7.16"
}

PLAY [python_interpreter_test_default, python_interpreter_test_defined] ***********************************************************************************************************

TASK [Gathering Facts] ************************************************************************************************************************************************************
ok: [debian10_python_defined]

TASK [debug] **********************************************************************************************************************************************************************
ok: [debian10_python_defined] => {
    "ansible_python_interpreter": "/usr/bin/python2"
}

TASK [debug] **********************************************************************************************************************************************************************
ok: [debian10_python_defined] => {
    "ansible_python_version": "2.7.16"
}

PLAY [python_interpreter_test_default, python_interpreter_test_defined] ***********************************************************************************************************

TASK [Gathering Facts] ************************************************************************************************************************************************************
ok: [debian10_python_auto]

TASK [debug] **********************************************************************************************************************************************************************
ok: [debian10_python_auto] => {
    "ansible_python_interpreter": "auto"
}

TASK [debug] **********************************************************************************************************************************************************************
ok: [debian10_python_auto] => {
    "ansible_python_version": "3.7.3"
}

PLAY [python_interpreter_test_default, python_interpreter_test_defined] ***********************************************************************************************************

TASK [Gathering Facts] ************************************************************************************************************************************************************
ok: [debian10_python_auto_legacy]

TASK [debug] **********************************************************************************************************************************************************************
ok: [debian10_python_auto_legacy] => {
    "ansible_python_interpreter": "auto_legacy"
}

TASK [debug] **********************************************************************************************************************************************************************
ok: [debian10_python_auto_legacy] => {
    "ansible_python_version": "2.7.16"
}

PLAY [python_interpreter_test_default, python_interpreter_test_defined] ***********************************************************************************************************

TASK [Gathering Facts] ************************************************************************************************************************************************************
ok: [debian10_python_group_defined]

TASK [debug] **********************************************************************************************************************************************************************
ok: [debian10_python_group_defined] => {
    "ansible_python_interpreter": "/usr/bin/python3"
}

TASK [debug] **********************************************************************************************************************************************************************
ok: [debian10_python_group_defined] => {
    "ansible_python_version": "3.7.3"
}

PLAY RECAP ************************************************************************************************************************************************************************
debian10_python_auto          : ok=3    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
debian10_python_auto_legacy   : ok=3    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
debian10_python_default       : ok=3    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
debian10_python_defined       : ok=3    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
debian10_python_group_defined : ok=3    changed=0    unreachable=0    failed=0    skipped=0    r

 

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