Ansible：检查磁盘大小并根据其大小创建卷组

如何解决Ansible：检查磁盘大小并根据其大小创建卷组

第一个节点的sdb大小为1GB 第二个节点sdb大小为600M 只是我无法检查磁盘的大小。执行以下剧本时出现错误（显示大小为0值）。

---
- hosts: all
  become: yes
  tasks:

    - debug:
        msg: "{{ ansible_devices.sdb.size }} is less than 800"
      when:  ansible_devices.sdb.size|int  < 800

---

$ ansible-playbook lvm-new.yml

ansible-playbook lvm-new.yml

PLAY [all] ***********************************************************************************************************************************************************************

TASK [Gathering Facts] ***********************************************************************************************************************************************************
ok: [servera]
ok: [serverb]

TASK [debug] *********************************************************************************************************************************************************************
ok: [serverb] => {
    "msg": "600.00 MB is less than 800"
}
ok: [servera] => {
    "msg": "1.00 GB is less than 800"
}

PLAY RECAP ***********************************************************************************************************************************************************************
servera                    : ok=2    changed=0    unreachable=0    failed=0   
serverb                    : ok=2    changed=0    unreachable=0    failed=0 

您能协助解决此任务吗？

解决方法

我已经通过以下方式解决了

---
- hosts: all
  become: yes
  tasks:
    - block:
        - parted: device=/dev/sdb unit=MiB
          register: sdb_info
        - debug:
            msg: '{{ sdb_info.disk.size }}'
        - debug:
            msg: "{{ sdb_info.disk.size }} greater than 800"
          when: " sdb_info.disk.size  > 800"
        - debug:
            msg: "{{ sdb_info.disk.size }} less than 800"
          when: " sdb_info.disk.size  < 800"

ansible-playbook lvm-new.yml

PLAY [all] *************************************************************************************************************************************************************

TASK [Gathering Facts] *************************************************************************************************************************************************
ok: [servera]
ok: [serverb]

TASK [parted] **********************************************************************************************************************************************************
fatal: [serverb]: FAILED! => {"changed": false,"err": "Error: Could not stat device /dev/sdb - No such file or directory.\n","msg": "Error while getting device information with parted script: '/sbin/parted -s -m /dev/sdb -- unit 'MiB' print'","out": "","rc": 1}
ok: [servera]

TASK [debug] ***********************************************************************************************************************************************************
ok: [servera] => {
    "msg": "1024.0"
}

TASK [debug] ***********************************************************************************************************************************************************
ok: [servera] => {
    "msg": "1024.0 greater than 800"
}

TASK [debug] ***********************************************************************************************************************************************************
skipping: [servera]

TASK [debug] ***********************************************************************************************************************************************************
ok: [serverb] => {
    "msg": "No disk detected"
}

PLAY RECAP *************************************************************************************************************************************************************
servera                    : ok=4    changed=0    unreachable=0    failed=0   
serverb                    : ok=2    changed=0    unreachable=0    failed=1