Just found this in the RHV docs. I think sections 2.8 to 2.12 cover everything you could wish to know about SPM process. It made it clear for me anyway. Once SPM is elected then all communication is via the storage domain, no TCP/IP comms required.

https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.0/html/technical_reference/role_the_storage_pool_manager

On 22 August 2017 at 16:58, Alan Griffiths <apgriffiths79@gmail.com> wrote:

It's my understanding that when you activate a host part of the process is to verify that it can connect to all active storage domains. If it cannot connect to any domain then it will refuse to go to the "up" state. In my case the storage domains are FC so completely outside the TCP/IP stack.
On 22 August 2017 at 16:42, FERNANDO FREDIANI <fernando.frediani@upx.com> wrote:
How do you make the new cluster to use the same storage domain as the original one ? Storage Domains in oVirt are a bit confusing and less flexible and I am not sure it allows it, does it ?

On 22/08/2017 12:23, Alan Griffiths 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
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