Andy, let me answser my own question. I searched  a lot of info in the last two days. maybe that's because if you put something in the root dir, the data will be lost after you update the ovirt node. only the /var dir is safe in ovirt node. is there any other ideas?
        

yours Adam
 
From: Andy Michielsen
Date: 2018-09-19 19:43
To: adam_xu@adagene.com.cn
CC: ovirtlist
Subject: Re: [ovirt-users] About Local Storage dir
Hello,

I think that is a requirement if you leave selinux active. You could modify selinux or disable it to use other folders.

Kind regards.

On 19 Sep 2018, at 07:33, "adam_xu@adagene.com.cn" <adam_xu@adagene.com.cn> wrote:

Hello, everyone. I want to export my vm as a ova to local path of the ovirt node. but I saw something about the local storage in the ovirt document:
It said:
Preparing Local Storage
...
Important: On oVirt Node, the path used for local storage must be within the /var directory; create the storage directory in the following procedure within /var

I check the partation of my ovirt nodes. the /var has only 15GB space  and the root dir / has 2.1 TB space. that is the default during the ovirt node installation.

question: why the loca storage must be put in the /var directory?

thanks.

yours Adam
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