On Tue, Aug 22, 2017 at 5:23 PM, Alan Griffiths <apgriffiths79@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_Enterprise_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