3-3 循环语法

#### 循环语法（列表） 一次安装多个软件 ```yaml --- - hosts: all tasks: - name: debug loops debug: msg="{{item}}" with_items: - one - tow - three - four ``` #### 循环语法（字典） ```yaml --- - hosts: all tasks: - name: debug dict debug: msg="name-->{{item.key}} value-->{{item.value}}" with_items: - {key: "one", value: "v1"} - {key: "two", value: "v2"} ``` #### 嵌套循环 注意关键字变化 ```yaml --- - hosts: all tasks: - name: debug dict debug: msg="name->{{item[0]}} value->{{item[1]}}" with_nested: - ['A', 'B'] - ['a', 'b', 'c'] ``` #### 散列循环（失败） ```yaml --- - hosts: all gather_facts: no vars: user: sheng: name: ding shell: bash ceshi: name: zhang shell: zsh tasks: - name: debug shell debug: msg="{{item.key}}" with_dict: "{{user}}" ``` #### 文件循环 ```yaml --- - hosts: all gather_facts: false tasks: - name: loop file debug: msg="{{item}}" with_fileglob: - /etc/ansible/playbook/*.yml ``` #### 判断语句 判断文件第一行是不是abc ```yaml --- - hosts: all gather_facts: no tasks: - name: debug loop judgement shell: cat /tmp/abc register: hosts until: hosts.stdout.startswith("abc") retries: 5 delay: 5 ```