kubespray/playbooks/ansible_version.yml

---
- name: Check Ansible version
  hosts: all
  gather_facts: false
  become: no
  run_once: true
  vars:
    minimal_ansible_version: 2.15.5  # 2.15 versions before 2.15.5 are known to be buggy for kubespray
    maximal_ansible_version: 2.17.0
  tags: always
  tasks:
    - name: "Check {{ minimal_ansible_version }} <= Ansible version < {{ maximal_ansible_version }}"
      assert:
        msg: "Ansible must be between {{ minimal_ansible_version }} and {{ maximal_ansible_version }} exclusive - you have {{ ansible_version.string }}"
        that:
          - ansible_version.string is version(minimal_ansible_version, ">=")
          - ansible_version.string is version(maximal_ansible_version, "<")
      tags:
        - check

    - name: "Check that python netaddr is installed"
      assert:
        msg: "Python netaddr is not present"
        that: "'127.0.0.1' | ansible.utils.ipaddr"
      tags:
        - check

    # CentOS 7 provides too old jinja version
    - name: "Check that jinja is not too old (install via pip)"
      assert:
        msg: "Your Jinja version is too old, install via pip"
        that: "{% set test %}It works{% endset %}{{ test == 'It works' }}"
      tags:
        - check