[ovirt-users] Inter Cluster Traffic

[Alan Griffiths]

I am planning to live migrate VMs. From my testing this works fine
providing cross cluster hosts can talk to each other and they share a
common migration network.

On 23 August 2017 at 13:54, Gianluca Cecchi <gianluca.cecchi at gmail.com>
wrote:

> On Tue, Aug 22, 2017 at 5:23 PM, Alan Griffiths <apgriffiths79 at gmail.com>
> wrote:
>
>> Hi,
>>
>> I'm in the process of building a second ovirt cluster within the default
>> DC. This new cluster will use the same storage domains as the original
>> cluster, and I will slowly migrate VMs from the old cluster to the new.
>>
>> Given that the old and new cluster hosts have a firewall between them I
>> need to ensure that all relevant ports are open, with particular attention
>> to the correct operation of SPM.
>>
>> Is it sufficient to open TCP ports 16514 and 54321 to achieve this?
>>
>> Thanks,
>>
>> Alan
>>
>>
> One note:
>
> when you say:
> I will slowly migrate VMs from the old cluster to the new.
>
> what do you mean exactly with "migrate"?
> If you mean Live Migraton as described here:
> https://access.redhat.com/documentation/en-US/Red_Hat_Enterp
> rise_Virtualization/3.5/html/Administration_Guide/sect-
> Migrating_Virtual_Machines_Between_Hosts.html
>
> please note that you can live migrate a VM only within the same cluster,
> not across.
>
> You can edit a VM of a datacenter and change the cluster where it have to
> start, but you have to first shutdown the VM to do so.
> Probably you already considered this and the related potential downtime
> for your services.
>
> Gianluca
>
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