Ansible 循环遍历 json 输出并添加索引

Question

几个小时以来，我一直在努力弄清楚如何使用 Ansible 执行以下操作，并循环遍历 JSON 输出。

让我解释一下，这是我的剧本：

- hosts: myhosts
  connection: local
  gather_facts: yes
  tasks:
    - name: set_fact 
      set_fact: 
        disk_info: "{{ disks | json_query('[*].{disk_size: disksize}')}}"

    - name: print set_fact
      debug:
        msg: "{{ disk_info }}"

    - name: iterate on disk_info one and increase index 1..n
      debug:
        msg: "{{ item }} {{ my_idx }}"
      loop:
        - "{{ disk_info }}"
      loop_control:
        index_var: my_idx

这是任务 - name: print 输出的 json 输出：

TASK [print] ****************************************************
ok: [hostname1] => {
    "msg": [
        {
            "disk_size": "200"
        },
        {
            "disk_size": "200"
        },
        {
            "disk_size": "200"
        }
    ]
}
ok: [hostname2] => {
    "msg": [
        {
            "disk_size": “300"
        }
    ]
}
ok: [hostname3] => {
    "msg": [
        {
            "disk_size": "250”
        }
    ]
}
ok: [hostname4] => {
    "msg": [
        {
            "disk_size": “500"
        },
        {
            "disk_size": “600”
        }
    ]
}

这是我从任务中得到的输出 (- name: iterate on disk_info one and increase index 1..n)

ok: [hostname1] => (item=[{'disk_size': '200'}, {'disk_size': '200'}, {'disk_size': '200'}]) => {
    "msg": "[{'disk_size': '200'}, {'disk_size': '200'}, {'disk_size': '200'}] 0"
}
ok: [hostname2] => (item=[{'disk_size': ‘300'}]) => {
    "msg": "[{'disk_size': ‘300'}] 0"
}
ok: [hostname4] => (item=[{'disk_size': ‘500'}, {'disk_size': '600’}]) => {
    "msg": "[{'disk_size': ’500'}, {'disk_size': '600’}] 0"
}

预期输出：

Hostname1:
disk_size1: 200
disk_size2: 200
disk_size3: 200

Hostname2:
disk_size1: 300

Hostname3:
disk_size1: 500
disk_size2: 600

预期输出可能与此类似，但添加了索引。

Answer 1

您是要将索引添加到结构还是文本输出？要获得预期的输出，您的最后一个任务应该遍历列表（而不是包含列表的列表）并以该形式输出数据：

    - name: iterate on disk_info one and increase index 1..n
      debug:
        msg: "disk_size{{ my_idx }}: {{ item.disk_size }}"
      loop: "{{ disk_info }}"
      loop_control:
        index_var: my_idx

创建结构比较困难，但并非不可能。我将在不使用 json_query 或 set_fact 的情况下进行演示，除非您正在做一些没有它们就不可能完成的事情。

- hosts: my_hosts
  vars:
    # You didn't provide an example of your input structure, so I'm assuming it
    # looks something like this.
    disks:
      - name: foo
        disksize: 200
      - name: bar
        disksize: 200
    disk_info: "{{ dict(range(0, disks | length) | map('regex_replace', '^', 'disk_size') | zip(disks | map(attribute='disksize'))) }}"
  tasks:
    - debug:
        msg: "{{ disk_info }}"

结果：

TASK [debug] *******************************************************************
ok: [harmless-ghoul.syslog.x.mail.umich.edu] => {
    "msg": {
        "disk_size0": 200,
        "disk_size1": 200
    }
}

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