[ovirt-users] Overt Networking VPN

Dan Yasny dyasny at gmail.com
Sat Sep 10 14:48:38 UTC 2016

On Wed, Sep 7, 2016 at 11:27 PM, System Administrator <
sysadmin at phoenixhawaii.net> wrote:

> Aloha,
> I am attempting to set up an Ovirt environment across every server that I
> currently manage.  I have a set of servers in one location, behind a single
> firewall with multiple IP's, and I have another set of servers in a second
> location halfway around the world, also with their own set of IP's.
> Additionally, the servers have different types of Intel CPU's, and varying
> amounts of memory and storage.  I also have a Fiber Optic SAN that I would
> like to use as my storage.

Do you have the same SAN at both locations? Are you able to set up async
replication between the two SANs?

> My question is:  Do I have to set up a VPN between every server that I
> want to install Ovirt on in order to manage them under a single Ovirt
> installation?  If so, how would I gain a highly available scenario?   In
> this case, if the server acting as the VPN server failed, the entire Ovirt
> system would collapse as well due to inability to communicate.

You need to have a VPN link between two sites, preferably a redundant one,
and with some serious bandwidth too, if you intend to replicate the SANs
across it. Once you have a replica of your storage domain on the second
site working, if the primary site goes down, you can bring everything up on
the secondary site. If you want this at a VM and not SD level, you might
either have to replicate LUNs separately and use direct LUNs for VMs, or
write some management scripts around it, so you will never end up with the
same VM started on both sites. The latter will also require active-active
LUN replication, which is usually a bad idea to start with.

> My goal is to combine the resources of all of my servers so that I can
> live migrate VM's between them based upon workload, and also availability
> of hardware.  If the servers in Canada fail for instance, I want the
> services to automatically migrate to my servers in Hawaii.

load balancing will be very tricky, DR - much easier.

> Any assistance you can provide would be greatly appreciated.  Thank you!
> Trenton
> Trenton D Warren
> President and CEO
> Phoenix Holdings Corporation
> Work:   (808) 263-7448
> Cell:     (478) 867-3107
> www.phoenixhawaii.net
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