[ovirt-devel] [VDSM] Correct implementation of virt-sysprep job

[Moran Goldboim]

On Mon, Dec 5, 2016 at 9:45 AM, Yaniv Kaul <ykaul at redhat.com> wrote:

>
>
> On Mon, Dec 5, 2016 at 9:18 AM, Shmuel Melamud <smelamud at redhat.com>
> wrote:
>
>>
>>
>> On Sun, Dec 4, 2016 at 10:39 PM, Yaniv Kaul <ykaul at redhat.com> wrote:
>>
>>>
>>>
>>> On Dec 4, 2016 8:50 PM, "Shmuel Melamud" <smelamud at redhat.com> wrote:
>>>
>>> Hi!
>>>
>>> I'm currently working on integration of virt-sysprep into oVirt.
>>>
>>> Usually, if user creates a template from a regular VM, and then creates
>>> new VMs from this template, these new VMs inherit all configuration of the
>>> original VM, including SSH keys, UDEV rules, MAC addresses, system ID,
>>> hostname etc. It is unfortunate, because you cannot have two network
>>> devices with the same MAC address in the same network, for example.
>>>
>>> To avoid this, user must clean all machine-specific configuration from
>>> the original VM before creating a template from it. You can do this
>>> manually, but there is virt-sysprep utility that does this automatically.
>>>
>>> Ideally, virt-sysprep should be seamlessly integrated into template
>>> creation process. But the first step is to create a simple button: user
>>> selects a VM, clicks the button and oVirt executes virt-sysprep on the VM.
>>>
>>>
>>> User selects a VM or a template disk?
>>>
>>
>> ​A VM. It is not safe to modify template disks. We cannot guarantee that
>> there are no VMs based on this template, because some of them may reside on
>> a detached storage.​
>>
>
> Any template disk that VM were derived from it is not safe to perform this
> operation. On a pristine template disk it is Ok - and it is exactly where I
> expect this process to take place.
> The user flow should be a checkbox in the create template flow.
> Y.
>
>

big +1 here, a general bottom doesn't indicate the user when to perform the
action, and takes it away from the desired flow. since the problem you are
presenting here is specifically around template creation, i also thing that
a checkbox here with the ability to "seal" the template, is the desired
solution to be aiming for.


>
>> ​Shmuel​
>>
>>
>
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