Something like this would do the trick:
In this case I'm using loop0 instead of sdb.
If loop0 size is higher than 2 GB (assuming no conversion to MB, that would
be great too).
It will set lv_size var to 500M, and thar value will be used in lvol task
otherwise it will use default lv size which is 400M.
HTH
- hosts: localhost
become: True
gather_facts: False
vars:
disk: loop0
vg_name: vgname
lv_name: lvname
default_lv_size: 400M
tasks:
- name: Collect hardware facts
setup:
gather_subset:
- hardware
- name: Register {{ disk }} size
set_fact:
secondary_disk_size: hostvars[inventory_hostname].ansible_devices['{{ disk
}}'].size.split(' ')[0]
- name: Set lv size
set_fact:
lv_size: "500M"
when:
- secondary_disk_size | int > 2
- name: Create {{ lv_name }} lv
lvol:
vg: "{{ vg_name }}"
lv: "{{ lv_name }}"
size: "{{ lv_size | d (default_lv_size) }}"
active: yes
force: no
state: present
El lun, 25 ene 2021 a las 15:41, ursa Brown (<ursabear...@gmail.com>)
escribió:
> Can you please show me how to do that? will this show an error? before
> creating the LVM?
>
> On Monday, January 25, 2021 at 8:38:24 AM UTC-6 jruar...@gmail.com wrote:
>
>> You can fetch secondary disk size and set the lvm size depending on it.
>> This is what I would do in your case:
>>
>> - Set default lvm size to a safe value that you know all your hosts
>> will meet. ie : 20G
>> - Fetch secondary disk size. If it's 50G or higher overwrite default
>> lvm size to 40G
>>
>> Regards
>>
>>
>>
>>
>>
>>
>> El lun, 25 ene 2021 a las 15:27, ursa Brown (<ursab...@gmail.com>)
>> escribió:
>>
>>> I have hosts that has 50G and 30G of SDB or disk2..
>>> My playbook only works if hosts has SDB is 50G, then it has no problem
>>> creating the 40G.
>>>
>>> But it throwing errros because some hosts has 30G of SDB.
>>>
>>> I want my playbook to still run, if the SB has only 30G then it will
>>> say, not enough disk, then will create a 20G.
>>> If the hosts has 50G, it will create the 40G lvm.
>>>
>>> Thank you
>>>
>>> On Monday, January 25, 2021 at 8:22:31 AM UTC-6 Antony Stone wrote:
>>>
>>>> On Monday 25 January 2021 at 15:15:56, ursa Brown wrote:
>>>>
>>>> > I got 2 hosts,
>>>> > one has 50G and the other one has 30G.
>>>> > I have no problem creating a 40G LVM on the hosts that has 50G. But
>>>> how can
>>>> > I make my ansible script if the hosts has 30G. It will say not enough
>>>> space
>>>> > then create 20G of lvm instead.
>>>>
>>>> Are you saying that you expect Ansible to create a 40Gb Logical Volume
>>>> on a
>>>> machine which has only 30Gb capacity?
>>>>
>>>> If not, please explain with a little more detail what you are trying to
>>>> get
>>>> Ansible to do.
>>>>
>>>>
>>>> Regards,
>>>>
>>>>
>>>> Antony.
>>>>
>>>> --
>>>> René Descartes walks in to a bar.
>>>> The barman asks him "Do you want a drink?"
>>>> Descartes says "I think not," and disappears.
>>>>
>>>> Please reply to the list;
>>>> please *don't* CC me.
>>>>
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