如果变量与正则表达式不匹配，则失败

Question

如果变量与给定的正则表达式不匹配，则查找将使playbook失败的Ansible任务。类似的东西：

# fail when hostname doesn't match a regex
- fail:
    msg: "The inventory hostname must match regex"
  when: {{ inventory_hostname }} not matches [a-z](([-0-9a-z]+)?[0-9a-z])?(\.[a-z0-9](([-0-9a-z]+)?[0-9a-z])?)*

Answer 1

您可能想要使用assert module：

- assert:
    that:
    - inventory_hostname | match('your regex')

另请参阅Playbook Tests和Filters