[Users] Help on an almost migrated ovirt-engine

[Adrian Gibanel]

----- Mensaje original ----- 

> De: "Juan Hernandez" <jhernand at redhat.com>
> Para: "Adrian Gibanel" <adrian.gibanel at btactic.com>
> CC: "users" <users at ovirt.org>
> Enviados: Martes, 22 de Enero 2013 9:40:29
> Asunto: Re: [Users] Help on an almost migrated ovirt-engine

> On 01/22/2013 02:48 AM, Adrian Gibanel wrote:
> > I need to migrate an ovirt-engine from an All-In-One (AIO) setup to
> > a dedicated machine.
> >
> > So with an old mailing message I've tried to do it but not finished
> > yet, that's why I ask for help.
> >
> > I've written a wiki page for the experience so that it becomes a
> > howto which can be found here:
> >
> > http://www.ovirt.org/User:Adrian15/oVirt_engine_migration
> >
> > At the last step the one that finally starts ovirt-engine I've
> > decided to ask help here just in case I was missing something
> > important.
> >
> > So here are my doubts.
> >
> > * Original message that inspired the howto is here:
> > http://www.mail-archive.com/users@ovirt.org/msg00670.html
> > * What packages should I delete safely from an AIO setup so that
> > it's just an hypervisor once I've migrate the ovirt-engine part?

> yum remove 'ovirt-engine-*' 'httpd' 'java-1.7.0-openjdk' 'jboss-as'

I've updated the howto. Thank you!

> > * Is the right way the one I've used to recreate the database?
> > ** Origin
> > pg_dump -U postgres engine | gzip > engine_db.gz
> > ** Destination
> > pg_dump -U postgres -s -f tempdb.dump engine
> > dropdb -U postgres engine
> > createdb -U postgres engine
> > zcat engine_db.gz | psql -U postgres engine

> I think this won't break anything, but if you want to create
> it
> exactly the same you can use the -O option of createdb:

> createdb -U postgres -O engine engine

I've finally come with:

* Origin:
pg_dump -U postgres engine | gzip > engine_db.gz
* Destination:
dropdb -U postgres engine
createdb -U postgres -O engine engine
zcat engine_db.gz | psql -U postgres engine

The last command was run finally with postgres user because using engine user I had these warnings:

WARNING:  no privileges could be revoked for "public"
REVOKE
WARNING:  no privileges could be revoked for "public"
REVOKE
WARNING:  no privileges were granted for "public"
GRANT
WARNING:  no privileges were granted for "public"
GRANT

> > * Let's read:
> > http://www.mail-archive.com/users@ovirt.org/msg00682.html : WRT
> > certificates, note that hostname should nt change, or SSL will be
> > invalidated.
> > Did he mean the SSL when you connect via http or https to the
> > manager which currently doesn't bother me?
> > Or maybe the SSL to connect to other hosts and communicate to vdsm
> > (sorry if I'm saying something nonsense. I don't understand oVirt
> > architecture completely) which bothers me?
> > * Certificates is: /etc/pki/ovirt-engine ? Something more?

> There is some information on how to change certificates here:

> http://lists.ovirt.org/pipermail/users/2012-October/004167.html

> It is not trivial, so better if you don't change the host name.

Can you please ellaborate why I should make sure that all these certificates know about the new host name?
If this was a plain ssh key it would just work by copying and pasting its private key file. That's why my doubts.
I don't mind if https at the browser complains about having one certificate for one domain and being another one.

Maybe communication with vdsm on hypervisors will not work at all?

> > * Conf is: /etc/ovirt-engine ? Something more?

> Yes, /etc/sysconfig/ovirt-engine, but you should be able to use the
> one
> generated during your new installation. The only difference will be
> the
> database password.
Ok. I'll check that later. I understand that if no difference is found apart from the database password then no need to modify it in the destination.

Thank you!

-- 

-- 
Adrián Gibanel 
I.T. Manager 

+34 675 683 301 
www.btactic.com 



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