Dear Clint,
maybe you misunderstood a little, or I didn't write it explicitly. We use
OpenStack for providing a VPS service, yes. But the VPS users do not get access
to OpenStack directly, but instead, they use our Customer Portal which does the
orchestration. The whole point is to make the service as easy as possible to
use for them and not expose them to the complexity of the Cloud. As I said, we
couldn't use Rebuild because VPS's have Volumes. We do use Resize because it is
there. But we could as well use more low-level cloud primitives. The user does
not care in this case. How does, e.g., WHMCS do it? That is a stock software
that you can use to provide VPS over OpenStack.
Tomas from Homeatcloud
-----Original Message-----
From: Clint Byrum [mailto:cl...@fewbar.com]
Sent: Thursday, October 05, 2017 6:50 PM
To: openstack-operators
Subject: Re: [Openstack-operators] [nova] Should we allow passing new user_data
during rebuild?
No offense is intended, so please forgive me for the possibly incendiary nature
of what I'm about to write:
VPS is the predecessor of cloud (and something I love very much, and rely on
every day!), and encourages all the bad habits that a cloud disallows. At small
scale, it's the right thing, and that's why I use it for my small scale needs.
Get a VM, put your stuff on it, and keep it running forever.
But at scale, VMs in clouds go away. They get migrated, rebooted, turned off,
and discarded, often. Most clouds are terrible for VPS compared to VPS hosting
environments.
I'm glad it's working for you. And I think rebuild and resize will stay and
improve to serve VPS style users in interesting ways. I'm learning now who our
users are today, and I'm confident we should make sure everyone who has taken
the time to deploy and care for OpenStack should be served by expanding rebuild
to meet their needs.
You can all consider this my white flag. :)
Excerpts from Tomáš Vondra's message of 2017-10-05 10:22:14 +0200:
In our cloud, we offer the possibility to reinstall the same or another OS on a
VPS (Virtual Private Server). Unfortunately, we couldn’t use the rebuild
function because of the VPS‘s use of Cinder for root disk. We create a new
instance and inject the same User Data so that the new instance has the same
password and key as the last one. It also has the same name, and the same
floating IP is attached. I believe it even has the same IPv6 through some
Neutron port magic.
BTW, you wouldn’t believe how often people use the Reinstall feature.
Tomas from Homeatcloud
From: Belmiro Moreira [mailto:moreira.belmiro.email.li...@gmail.com]
Sent: Wednesday, October 04, 2017 5:34 PM
To: Chris Friesen
Cc: openstack-operators@lists.openstack.org
Subject: Re: [Openstack-operators] [nova] Should we allow passing new user_data
during rebuild?
In our cloud rebuild is the only way for a user to keep the same IP.
Unfortunately, we don't offer floating IPs, yet.
Also, we use the user_data to bootstrap some actions in new instances (puppet,
...).
Considering all the use-cases for rebuild it would be great if the user_data
can be updated at rebuild time.
On Wed, Oct 4, 2017 at 5:15 PM, Chris Friesen<chris.frie...@windriver.com>
wrote:
On 10/03/2017 11:12 AM, Clint Byrum wrote:
My personal opinion is that rebuild is an anti-pattern for cloud, and
should be frozen and deprecated. It does nothing but complicate Nova
and present challenges for scaling.
That said, if it must stay as a feature, I don't think updating the
user_data should be a priority. At that point, you've basically
created an entirely new server, and you can already do that by
creating an entirely new server.
If you've got a whole heat stack with multiple resources, and you realize that
you messed up one thing in the template and one of your servers has the wrong
personality/user_data, it can be useful to be able to rebuild that one server
without affecting anything else in the stack. That's just a convenience though.
Chris
_______________________________________________
OpenStack-operators mailing list
OpenStack-operators@lists.openstack.org
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
_______________________________________________
OpenStack-operators mailing list
OpenStack-operators@lists.openstack.org
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
