← Back to team overview

openstack team mailing list archive

Re: Instance IDs and Multiple Zones

 

I asked for further details in IRC, which started a discussion
there. To sum up, most folks agree migrations within a zone won't
require a new instance ID. Nothing changes except the compute host
it's running on. Migrations outside of a zone would require a new
instance ID, but this should be fine, since other things would also
change (such as IP, available volumes, ...). A cross-zone migration
will be more of a copy+delete than a proper move.

-Eric

On Wed, Mar 23, 2011 at 06:14:31PM +0000, Sandy Walsh wrote:
> Pvo brought up a good use case for naming a little while ago: Migrations.
> 
> If we use the instance id (assume UNC) to provide hints to the target zone, this means the instance id would need to change should the instance move locations. That's a no-no by everyone's measure. 
> 
> So, now I'm thinking more about Justin's comment about an external registry.
> 
> Perhaps a glance-like entry with metadata that can change?
> 
> Confidentiality Notice: This e-mail message (including any attached or
> embedded documents) is intended for the exclusive and confidential use of the
> individual or entity to which this message is addressed, and unless otherwise
> expressly indicated, is confidential and privileged information of Rackspace.
> Any dissemination, distribution or copying of the enclosed material is prohibited.
> If you receive this transmission in error, please notify us immediately by e-mail
> at abuse@xxxxxxxxxxxxx, and delete the original message.
> Your cooperation is appreciated.
> 
> 
> _______________________________________________
> Mailing list: https://launchpad.net/~openstack
> Post to     : openstack@xxxxxxxxxxxxxxxxxxx
> Unsubscribe : https://launchpad.net/~openstack
> More help   : https://help.launchpad.net/ListHelp



Follow ups

References