[Openstack-operators] [nova] Recovering instances from old system

Liam Haworth liam.haworth at bluereef.com.au
Mon Jan 11 04:58:19 UTC 2016

Hey Abel,

When I say 'wiped everything clean" I mean that we made backups of the
databases and configuration on all hosts before reinstalling Ubuntu 14.04
LTS on top to start with a clean slate, we did this because we decided to
make the change to the LinuxBridge agent from the OpenVSwitch agent plus we
where upgrading from Icehouse to Liberty, this along with a major
restructure with how our network is laid out.

Really I'm just looking for some input on if I should attempt to extract
the records of the instance backed up from the database and manually insert
them or if I should take the instance dicks and load them in as images and
spin them backup from there.

Hopefully I made a bit more sense this time, sorry.

On Sat, 9 Jan 2016 at 03:26 Abel Lopez <alopgeek at gmail.com> wrote:

> I would expect that if you have the databases in place, and they went
> through the proper migrations, that your instances would still be there.
> You can check the nova database instances table using the uuid.
> How exactly did you 'wipe everything clean'?
> On Jan 7, 2016, at 5:35 PM, Liam Haworth <liam.haworth at bluereef.com.au>
> wrote:
> Hey guys,
> I just recently rebuilt the OpenStack infrastructure at my work to upgrade
> from Juno to Liberty, before wiping everything clean I made dumps of all
> the databases and the instances where persisted though the upgrade via NFS.
> Now that I have the infrastructure up and going again I was wondering what
> would be the best way to import the instances back in, I understand I may
> need to change some fields in the database dumps to change project ids and
> such but I just wanted to get some input on if this is a good idea or if
> there is a better way to do this?
> Kind regards,
> --
> *Liam Haworth* | Junior Software Engineer | www.bluereef.com.au
> *_________________________________________________________________*
> *T*: +61 3 9898 8000 | *F*: +61 3 9898 8055
> _______________________________________________
> OpenStack-operators mailing list
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> --
*Liam Haworth* | Junior Software Engineer | www.bluereef.com.au
*T*: +61 3 9898 8000 | *F*: +61 3 9898 8055
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