python - 如何在 Ansible 2.7 或 2.8 中循环遍历多级 dict 或 yaml？

Question

我通过多级 yaml 找到了一些 ansible 循环示例，但是，我似乎无法再深入一层。

我有一个要在 xenserver 池上创建的机器或虚拟机的列表，我需要选择主机名、CPU 数量等。

#Requires ansible dev version 2.8.  2.8 will be release summer 2019.

- hosts: xenservers
  vars:
    Machines:
      Connectors:
        Connector1:
          hostname: CCConn-0001
          num_cpus: 4
          num_cpu_cores_per_socket: 2
          memory_mb: 8192
        Connector2:
          hostname: CCConn-0002
          num_cpus: 4
          num_cpu_cores_per_socket: 2
          memory_mb: 8192
      #Storefronts:
      #  Storefront1:
      #    hostname: SFPrinci-0001
      #    num_cpus: 4
      #    num_cpu_cores_per_socket: 2
      #    memory_mb: 8192

  tasks:
  # - name: Create VMs from a template
  #   xenserver_guest:
  #     hostname: 10.8.47.11
  #     username: 
  #     password: 
  #     validate_certs: no
  #     #folder: /home/testvms
  #     name: '{{Need a hostname here}}'
  #     state: poweredon
  #     template: W2K16_RTM_64_EN_ans
  #     disks:
  #     - size_gb: 100
  #       name: ''
  #       sr: XenRTVol
  #     linked_clone: yes
  #     hardware:
  #       num_cpus: 'Need number of cpus here'
  #       num_cpu_cores_per_socket: 'Need cores per socket here'
  #       memory_mb: 'Need memory here'
  #     cdrom:
  #       type: iso
  #       iso_name: guest-tools.iso
  #     networks:
  #     - name: vlan40
  #     wait_for_ip_address: no
  #   delegate_to: localhost
  #   register: deploy
  #   with_subelements: '{{Machines}}'

  - name:
    debug:
      msg: "{{ item.key }} - {{ item.value }}"
    loop: "{{ Machines | dict2items }}"

我一直在玩 dict2items，但是，我不知道如何获得我需要的低一级的值。如果这是有道理的。

Answer 1

您可以丢弃两个级别上的所有键名称并仅迭代值:

- debug:
    msg: "{{ item }}"
  loop: "{{ Machines | json_query('*.*[]') }}"

json_query 过滤器使用 JMESPath语法。