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chin wooi Ng
Asked: 2024-01-07 09:56:52 +0800 CST

验证 ansible-playbook 中额外的变量值是否正确

  • 772

我有一个需要传递的 Ansible 剧本--extra-vars，并且想知道是否有任何方法可以验证该值是定义的列表值之一。

样本test.yml

- hosts: localhost
  gather_facts: false

  vars:

    prod_mgmt_network: "{{ ['server00'] | product(range(start,end)) | map('join') | list }}"
    start: 4281
    end: 4283

  tasks:

    - debug:
        var: prod_mgmt_network

命令示例

ansible-playbook --extra-vars hostName=server004181 test.yml

--extra-vars hostName我想要一个任务，如果值不是定义的变量之一，则执行将失败。

ansible

1 个回答

  1. Best Answer

    您可以使用assert或fail任务。

    使用断言

    - name: check that variable is defined using assert
  assert:
    that: hostname|default('') is in prod_mgmt_network
    fail_msg: "hostname is not in prod_mgmt_network"

    结果是：

    TASK [check that variable is defined using assert] ********************************************************************************************************
fatal: [localhost]: FAILED! => {
    "assertion": "hostname is defined",
    "changed": false,
    "evaluated_to": false,
    "msg": "hostname is not in prod_mgmt_network"
}

    使用失败

    - name: check that variable is defined using fail
  when: hostname|default('') is not in prod_mgmt_network
  fail:
    msg: "hostname is not in prod_mgmt_network"

    结果是：

    TASK [check that variable is defined using fail] **********************************************************************************************************
fatal: [localhost]: FAILED! => {"changed": false, "msg": "hostname is not in prod_mgmt_network"}
    • 2

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