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Ansible 将字典转换为字典/数组的混合

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Ansible 将字典转换为字典/数组的混合

我使用以下文件：变量文件：db.yml

x86_64:  
  alpine:
    version: 3.15.0
  debian:
    version: 11.3.0

aarch64:
  alpine:
    version: 3.15.0
  debian:
    version: 11.3.0

剧本：playbook.yml

---
- name: "Playbook" 
  hosts: localhost
  connection: local
  gather_facts: no

  tasks:
  - name: Import variables
    ansible.builtin.include_vars:
      file: db.yml
      name: db

  - name: DENUG >>> db
    debug:
      var: db


  - name: DENUG >>> db
    debug:
      var: db[item].alpine
    loop: "{{ db.keys()|list }}"
    when: db[item].alpine is defined

输出：

ok: [localhost] => (item=x86_64) => {
    "ansible_loop_var": "item",
    "db[item].alpine": {
        "version": "3.15.0"
    },
    "item": "x86_64"
}
ok: [localhost] => (item=aarch64) => {
    "ansible_loop_var": "item",
    "db[item].alpine": {
        "version": "3.15.0"
    },
    "item": "aarch64"
}

现在我已将 db.yml 转换为新样式，如下所示：

x86_64:
  - distribution: alpine
    version: 3.15.0
  - distribution: debian
    version: 11.3.0

aarch64:
  - distribution: alpine
    version: 3.15.0
  - distribution: debian
    version: 11.3.0

问题：
如何运行类似的命令如下：

- name: DENUG >>> db
    debug:
      var: db[item].alpine
    loop: "{{ db.keys()|list }}"
    when: db[item].alpine is defined

并获得与输出中可用的结果相同的结果。
基本上如何循环通过这个新的 db.yml 来获取 db.x86_64.alpine.version 的值

答案1

例如，

db_list: "{{ dict(_keys|zip(_vals)) }}"
_keys: "{{ db.keys()|list }}"
_vals: "{{ db.values()|map('dict2items')|map('json_query', _query) }}"
_query: "[].{distribution: key, version: value.version}"

给出

  db_list:
    aarch64:
    - distribution: alpine
      version: 3.15.0
    - distribution: debian
      version: 11.3.0
    x86_64:
    - distribution: alpine
      version: 3.15.0
    - distribution: debian
      version: 11.3.0

通常，创建一个包含所有属性的列表

db_list: "{{ _val2|zip(_val1)|
             map('flatten')|
             map('zip', ['version', 'arch', 'distribution'])|
             map('map', 'reverse')|
             map('community.general.dict') }}"
_dict: "{{ lookup('ansible.utils.to_paths', db) }}"
_val1: "{{ _dict.keys()|map('split', '.')|list }}"
_val2: "{{ _dict.values()|list }}"

给出

  db_list:
  - arch: x86_64
    distribution: alpine
    version: 3.15.0
  - arch: x86_64
    distribution: debian
    version: 11.3.0
  - arch: aarch64
    distribution: alpine
    version: 3.15.0
  - arch: aarch64
    distribution: debian
    version: 11.3.0

现在，您可以选择您想要的任何内容，例如

  • 迭代架构的子集
    - debug:
        msg: "{{ item }}"
      loop: "{{ db_list|selectattr('arch', 'in', ['aarch64', 'x86_64']) }}"
  • 迭代发行版“debian”
    - debug:
        msg: "{{ item }}"
      loop: "{{ db_list|selectattr('distribution', 'eq', 'debian') }}"
  • 迭代小于“11.3.0”的版本
    - debug:
        msg: "{{ item }}"
      loop: "{{ db_list|selectattr('version', 'version', '11.3.0', '<') }}"
  • 在架构“aarch64”中迭代分布“alpine”
    - debug:
        msg: "{{ item }}"
      loop: "{{ db_list|selectattr('arch', 'eq', 'aarch64')|
                        selectattr('distribution', 'eq', 'alpine') }}"

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