创建一个名为/ansible/lv.yml 的 playbook ，它在所有受管节点上运行以执行下列任务：

    创建符合以下要求的逻辑卷：

        逻辑卷创建在 research 卷组中

        逻辑卷名称为 data

        逻辑卷大小为 1500 MiB

    使用 ext4 文件系统格式化逻辑卷

    如果无法创建请求的逻辑卷大小，应显示错误信息

    Could not create logical volume of that size

     ，并且应改为使用大小 800 MiB。

    如果卷组 research 不存在，应显示错误信息

    Volume group done not exist

#创建文件
vim lv.yml


#playbook内容
---
- name: create
  hosts: all
  tasks:
    - name: check research
      shell: vgs research
      ignore_errors: yes
      register: res

    - name: no research
      debug:
        msg: Volume group done not exist
      when: res is failed
      failed_when: res is failed
      
    - name: create lv
      block:
        - name: c 1500m
          lvol:
            size: '1500'
            lv: data
            vg: research
          when: "'research' in ansible_lvm.vgs"
          
      rescue:
        - name: no 1500m
          debug:
            msg: Could not create logical volume of that size
            
        - name: c 800m
          lvol:
            size: '800'
            lv: data
            vg: research
          when: "'research' in ansible_lvm.vgs"

- name: mkfs
  hosts: all
  tasks:
    - name: ext
      filesystem:
        fstype: ext4
        dest: /dev/research/data
      when: "'data' in ansible_lvm.lvs"




#运行playbook
ansible-playbook lv.yml

#查看
ansible all -m shell -a 'lvs'