I will briefly explain our use case. This idea is related to another
project to enable the network boot in OpenStack
https://blueprints.launchpad.net/nova/+spec/pxe-boot-instance
We want to make use of the extra-dhcp-opt to indicate as tftp server a
specific instance inside our deployed system, so it will provide the
right operating system to the other instances booting from network (once
the feature from the linked blueprint will be implemented).
On the tftp server we want to be able to filter what boot file to
provide to different class of instances and our idea was to identify
each class with 2 hexadecimal of the UUID (while the rest would be
random generated, still "granting" its uniqueness).
Anyway this is a customization for our specific environment and for a
feature that is still in early proposal stage, so we wanted to propose
as a separate feature to allow user custom UUID and manage the
generation out of OpenStack.
On 09/24/14 23:15, Matt Riedemann wrote:
On 9/24/2014 3:17 PM, Dean Troyer wrote:
On Wed, Sep 24, 2014 at 2:58 PM, Roman Podoliaka
<[email protected] <mailto:[email protected]>> wrote:
Are there any known gotchas with support of this feature in REST
APIs
(in general)?
I'd be worried about relying on a user-defined attribute in that use
case, that's ripe for a DOS. Since these are cloud-unique I wouldn't
even need to be in your project to block you from creating that clone
instance if I knew your UUID.
dt
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Dean Troyer
[email protected] <mailto:[email protected]>
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We talked about this a bit before approving the
'enforce-unique-instance-uuid-in-db' blueprint [1]. As far as we knew
there was no one using null instance UUIDs or duplicates for that matter.
The instance object already enforces that the UUID field is unique but
the database schema doesn't. I'll be re-proposing that for Kilo when
it opens up.
If it's a matter of tagging an instance, there is also the tags
blueprint [2] which will probably be proposed again for Kilo.
[1]
https://blueprints.launchpad.net/nova/+spec/enforce-unique-instance-uuid-in-db
[2] https://blueprints.launchpad.net/nova/+spec/tag-instances
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Pasquale Porreca
DEK Technologies
Via dei Castelli Romani, 22
00040 Pomezia (Roma)
Mobile +39 3394823805
Skype paskporr
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