9.ansible 循环功能和忽略错误

1.循环变量

在剧本中设置循环信息
vim test04.yml

- hosts: all
  remote_user: root
  tasks:
    - name: Add Users
      user: name="{{ item.name }}" groups="{{ item.groups }}" state=present
      with_items:
            - { name: 'testuser1', groups: 'bin' }
            - { name: 'testuser2', groups: 'root' }

vim test05.yml

- hosts: all    
  remote_user: root
  tasks:
    - name: Installed Pkg
      yum: name="{{ item }}"  state=present
      with_items:
            - wget
            - tree
            - lrzsz

实践配置：
[root@m01 ansible_playbook]# cat test_循环功能.yaml

- hosts: 172.16.1.7
  tasks:
    #- name: 创建多个用户
    #  user: name="{{ item.name }}" shell="{{ item.shell }}" create_home="{{ item.create_home }}"
    #  with_items:
    #    - { name: 'oldboy01', shell: '/sbin/nologin', create_home: 'no' }
    #    - { name: 'oldboy02', shell: '/sbin/nologin', create_home: 'yes' }
    #    - { name: 'oldboy03', shell: '/bin/bash', create_home: 'yes' }
    - name: 创建多个用户
      user: name="{{ item }}" shell=/sbin/nologin create_home=no
      with_items:
        - oldboy04
        - oldboy05
        - oldboy06

扩展说明：单独加载指定主机清单文件

ansible-playbook nfs_auto.yaml -i ./nfs_hosts
	-i  指定加载主机清单

2.在剧本中设置忽略错误

默认playbook会检查命令和模块的返回状态，如遇到错误就中断playbook的执行
可以加入ignore_errors: yes忽略错误

    vim test06.yml
    - hosts: all
      remote_user: root
      tasks:
        - name: Ignore False
          command: /bin/false
    	  ignore_errors: yes
        - name: touch new file
    	  file: path=/tmp/oldboy_ignore state=touch	

实践配置：

    [root@m01 ansible_playbook]# cat test_忽略错误.yaml 
    - hosts: 172.16.1.7
      tasks:
        - name: create user
          shell: useradd oldboy01 -s /sbin/nologin -M
          ignore_errors: yes
        - name: create dir
          shell: mkdir /oldboy
          ignore_errors: yes
        - name: create file
          shell: touch /etc/oldboy.txt