ansible获取远程机器上的ip地址

问题：

想要使用ansible-playbook脚本创建一个以远程机器的IP命名的目录

错误的代码：# vim test.yml

---
  - hosts: all
    remote_user: root
    vars:
      collect_info: "/data/test/{{ansible_all_ipv4_addresses}}/"

    tasks:
      - name: create IP directory
         file:
           name: "{{collect_info}}"
           state: directory

# ls -l /data/test/
总用量
drwxr-xr-x  root root  5月   : [u'192.168.37.135']

原因是：获取的格式不对

# ansible all -m setup -a "filter="ansible_all_ipv4_addresses""
127.0.0.1 | SUCCESS => {
    "ansible_facts": {
        "ansible_all_ipv4_addresses": [
            "192.168.0.1"
        ]
    },
    "changed": false
}

而 “ansible_default_ipv4”获取的格式则刚好可以使用

# ansible all -m setup -a "filter="ansible_default_ipv4""
127.0.0.1 | SUCCESS => {
    "ansible_facts": {
        "ansible_default_ipv4": {
            "address": "192.168.0.1",
            "alias": "ens19",
            "broadcast": "192.168.0.255",
            "gateway": "192.168.0.254",
            "interface": "ens19",
            "macaddress": "00:0c:29:39:2c:95",
            "mtu": ,
            "netmask": "255.255.255.0",
            "network": "192.168.0.0",
            "type": "ether"
        }
    },
    "changed": false
}

正确的代码是：

---
  - hosts: all
    remote_user: root
    vars:
      collect_info: "/data/test/{{ansible_default_ipv4['address']}}/"

    tasks:
      - name: create IP directory
         file:
           name: "{{collect_info}}"
           state: directory

网上有些说方法是：{{ipv4_eth0['address']}}，但是我的机器setup获取到的数值中没有ipv4_eth0，所以在截取数值之前先确认一下ip地址位于哪个部分，然后再截取正确的数值。