简单记录一下在ansible脚本执行中获取单个节点（当前处理节点）ip地址的方法

方法一：

---

- name: Set host ip value 
  set_fact:
    node_ip: "{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}"
    node_ip: "{{ ansible_facts.default_ipv4.address }}"

- name: Display host ip information
  debug:
    var: node_ip

方法二：

---

- name: Collect IP information
  setup:
    filter: ansible_default_ipv4

- name: show host ip value 
  debug:
    var: ansible_facts.default_ipv4.address

- name: Set host ip value 
  set_fact:
    node_ip: "{{ ansible_facts.default_ipv4.address }}"

- name: Display host ip information
  debug:
    var: node_ip

上述方法都需要配置gather_facts: true　在一定程度上会影响执行的时间．

方法三：

---

- name: Set host ip value 
  set_fact:
    node_ip: "{{ ansible_host }}"

- name: Display host ip information
  debug:
    var: node_ip

方法三不需要配置gather_facts: true　直接使用ansible_host获取当前处理节点的ip地址