如何按RHEL版本在Ansible Playbook中排除指定import_playbook任务？

import_playbook 支持直接添加 when 条件判断，你可以针对不同阶段的剧本设置对应的执行条件，满足你的版本要求：

# stage1-stage6 允许在RHEL7.9和8.6执行
- import_playbook: "{{playbook_folder}}/install_stage1.yml"
  when: ansible_facts['distribution_version'] in ["7.9", "8.6"]
- import_playbook: "{{playbook_folder}}/install_stage2.yml"
  when: ansible_facts['distribution_version'] in ["7.9", "8.6"]
- import_playbook: "{{playbook_folder}}/install_stage3.yml"
  when: ansible_facts['distribution_version'] in ["7.9", "8.6"]
- import_playbook: "{{playbook_folder}}/install_stage4.yml"
  when: ansible_facts['distribution_version'] in ["7.9", "8.6"]
- import_playbook: "{{playbook_folder}}/install_stage5.yml"
  when: ansible_facts['distribution_version'] in ["7.9", "8.6"]
- import_playbook: "{{playbook_folder}}/install_stage6.yml"
  when: ansible_facts['distribution_version'] in ["7.9", "8.6"]

# stage7 仅在RHEL8.6执行（排除所有RHEL7.x版本）
- import_playbook: "{{playbook_folder}}/install_stage7.yml"
  when: ansible_facts['distribution_version'] == "8.6"

如果需要更灵活地排除所有RHEL7.x子版本（不局限于7.9），可以改用主版本判断：

- import_playbook: "{{playbook_folder}}/install_stage7.yml"
  when: ansible_facts['distribution_major_version'] != "7"

内容的提问来源于stack exchange，提问作者King David