访问Ansible中的嵌套变量

Question

假设我在我的group_vars中定义了这一点：

ucarp_data:
  - vhid: 6
    interface: eth0
    hosts:
      - 10.1.60.4
      - 10.1.60.5
    options: --shutdown --preempt

  - vhid: 9
    interface: eth0
    hosts:
      - 10.1.60.7
      - 10.1.60.8
    options: --shutdown --preempt

我想检查我当前正在运行的主机是否在这个hosts:数组中。

类似于：

- name: Check if ucarp_data contains this host
  assert:
    that: ansible_host in ucarp_data.hosts

但这会返回fatal: [test_machine]: FAILED! => {"msg": "The conditional check 'ansible_host in ucarp_data.hosts' failed. The error was: error while evaluating conditional (ansible_host in ucarp_data.hosts): 'dict object' has no attribute 'hosts'"

有什么想法吗？

而且我一直用Ansible和嵌套的yaml变量来阻塞这些路障..。我似乎无法像在木星笔记本中那样动态地探索，任何Python对象都有选项卡完成，这对此有很大帮助吗？

Answer 1

例如，给定列表ucarp_data，下面的剧本

- hosts: 10.1.60.5,10.1.60.7,10.1.60.9
  tasks:
    - assert:
        that: inventory_hostname in ucarp_data|map(attribute='hosts')|flatten
        fail_msg: "[ERR] {{ inventory_hostname }} not in ucarp_data"

给予(删节)

ok: [10.1.60.5] => changed=false 
  msg: All assertions passed
ok: [10.1.60.7] => changed=false 
  msg: All assertions passed
fatal: [10.1.60.9]: FAILED! => changed=false 
  assertion: inventory_hostname in ucarp_data|map(attribute='hosts')|flatten
  evaluated_to: false
  msg: '[ERR] 10.1.60.9 not in ucarp_data'