[ovirt-users] cloud-init and sealing of template

[Gianluca Cecchi]

On Tue, Dec 1, 2015 at 9:42 AM, Shahar Havivi <shaharh at redhat.com> wrote:

> On 01.12.15 09:03, Gianluca Cecchi wrote:
> > Hello,
> > is it correct that even if I use cloud-init I have to seal my candidate
> VM
> > before making it a template?
> Well it depend,
> If you have a common initialization you can run cloud-init before sealing
> the
> template, its more reasonable to create a template and run cloud-init on
> each
> VM that created from this template.
> > In that case what is the correct approach to pre-seal a CentOS 7 VM?
> > Also, for operating system like Fedora >=20 and/or RHEL/CentOS 7 should I
> > unconfigure NetworkManager before sealing them, using classic network
> > service, or what?
> Yes the NetworkManager can override cloud-init network settings.
> >
>
>
OK, I'm trying using classic network instead of NetworkManager.
But right before running the "make template" action, do I have to run any
of "sys-unconfig" and/or "virt-sysprep" tools?

- sys-unconfig
I see in its man page:
"This utility should not be used for creating cloud or virtual machine
images.  For  that  use  please see virt-sysprep"
Does this note apply also in my scenario where I want to seal a VM in oVirt
before making a template from it?

- virt-sysprep
It should be run "out of band" against a disk of a powered off VM if I
understood correctly.
Is it applicable in my case with oVirt and a disk that actually is on a
storage domain?
It seems more applicable in a plain Qemu?KVM environment...

It remains open the question about how to properly seal a RHEL 7 / CentOS 7
VM/OS.
Thanks,
Gianluca
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