[Users] virt-manager migration

[Jeremiah Jahn]

I was just using ovirt-node-setup to see what going on. Also used it
to setup my resolv.conf. I did use the New wizard, but it seems to
have failed at the point where ovirtmgmt magic was supposed to happen.
Dragging the ovrtmgmt network onto the proper interface in the host
then results in udev trying to restart repeatedly my vlan device after
failing with a dhcpclient request. Since it's already got an ip on
that vlan all hell breaks loose and no dhcp response ever comes.
Thanks for the help though, I hope someone else on the list can give
me a pointer or some help.

-jj-

On Thu, Apr 3, 2014 at 3:04 PM, Ryan Barry <rbarry at redhat.com> wrote:
> On 04/03/2014 03:58 PM, Jeremiah Jahn wrote:
>>
>> Well, that was fun. So I let the ovirt engine install to a running
>> host that already had kvm/libvirt running on it. Don't ask why, but it
>> did happen.  After figuring out how to setup a sasl user/password and
>> adding qemu to the disk group I could startup all of my guests again.
>>    My host now shows up in the list of hosts, but has "One of the
>> Logical Networks defined for this Cluster is Unreachable by the Host."
>>   error sitting on it.  ovirt-node-setup also tells me I should setup a
>> network.   I currently have 6 bridges running on this thing all one
>> for each vlan. I'm unsure as to how to meld the 'bondX' in
>> ovirt-node-setup with my current network configuration to resolve the
>> error.  esp given that I don't actually want to bond any of my NIC's
>> together at this point.  I do realise I'm doing this the hard way.  My
>> goal at the moment is to just get the host to fully report in the
>> engine, at which point I think I'll be able to use v2v to finish up
>> the rest.
>>
>> Thanks for any suggestions or pointers.
>>
> That's ok. I probably would have skipped ovirt-node-setup (which is intended
> to run on the oVirt Node ISO) and used the "New" wizard from the Engine to
> add it (which would install requisite RPMs, etc).
>
> The "one of the networks is not reachable" error isn't really my area, but
> it's probably looking for the host to be reachable by IP on a bridge called
> ovirtmgmt.
>
> An engine developer can verify this, but I'd guess that adding a virtual NIC
> to whatever VLAN has the IP the engine sees and bridging that to ovirtmgmt
> with the appropriate address would work. It may only need the right bridge
> (ovirtmgmt, probably) defined. I've never experimented with this aspect of
> it, to be honest.
>
>>
>> On Thu, Apr 3, 2014 at 10:29 AM, Ryan Barry <rbarry at redhat.com> wrote:
>>>>
>>>> From: "Jeremiah Jahn" <jeremiah at goodinassociates.com>
>>>> To: users at ovirt.org
>>>> Sent: Wednesday, April 2, 2014 8:38:02 PM
>>>> Subject: [Users] virt-manager migration
>>>
>>>
>>>>
>>>
>>>> Anyway, long story short. I'm having a difficult time finding
>>>> documentation
>>>> on migrating from virt-manager to oVirt. As well as installing
>>>> ovirt-nodes
>>>> manually. I'd love to find this perfect world where I can just install
>>>> the
>>>> ovirt-node RPMs on my already running Hosts and begin to have them
>>>> managed
>>>> by the oVirt engine. Without and serious downtime.
>>>
>>>
>>> The usual way is to go through virt-v2v. Essentially, you'd install the
>>> engine somewhere and configure a storage domain (the properties of which
>>> vary, but it's UUIDed and the UUID must match the engine) to bring the
>>> datacenter up, then add an export domain (which is also UUIDed).
>>>
>>> Once an export domain is created, virt-v2v can move your VMs over, but
>>> with
>>> downtime.
>>>
>>> As far as turning your existing hosts into nodes, adding them from the
>>> engine is the easiest way (there's a wizard for this). It's possible to
>>> install the ovirt-node RPMs directly, but they take over your system a
>>> bit,
>>> and it's probably not what you're looking for. The engine can manage
>>> regular
>>> EL6/fedora hosts.
>>>
>>> But registering to the engine will reconfigure libvirt, so the general
>>> path
>>> is:
>>>
>>> Install engine.
>>> Live-migrate VMs off one of your hosts.
>>> Add that host as a node.
>>> virt-v2v machines than can take downtime (can you get a maintenance
>>> window)?
>>> Bring them up on the new node.
>>> Repeat until your environment is converted.
>
>