On Fri, Feb 23, 2018 at 6:33 PM, Tal Bar-Or <tbaror@gmail.com> wrote:

Hello Ovirt users,

Currently we haveing 4 Xen pools in our organization each pool have 8 servers. Due to new 7.3 version change ,we plan to migrate our upcoming 5th pool to Ovirt, the decision to do POC migration to Ovirt is from lots of Xen users that suggested Ovirt migration better and mature product migrate to it.

I started to test Ovirt currently only with one server with engine installed, my question regarding Ovirt sine i am really newbie with that system , is , is it possible to have multiple engine on it ? What happen if the engine server crash with some reason? can i load it on another cluster server? Please advice

The standard way to have HA for oVirt engine is to set it up as a self-hosted-engine and have more than one host in the hosted-engine cluster. We do know that there are people doing HA using other means, based on external HA software (heartbeat), but that's more expensive (in hardware, work, and perhaps software, depends on what you use) - I'd suggest doing that only if your organization already has in-house expertise and experience with such software. Good luck and best regards, -- Didi

On Fri, Feb 23, 2018 at 11:33 AM, Tal Bar-Or <tbaror@gmail.com> wrote:

Hello Ovirt users,

Currently we haveing 4 Xen pools in our organization each pool have 8 servers. Due to new 7.3 version change ,we plan to migrate our upcoming 5th pool to Ovirt, the decision to do POC migration to Ovirt is from lots of Xen users that suggested Ovirt migration better and mature product migrate to it.

I started to test Ovirt currently only with one server with engine installed, my question regarding Ovirt sine i am really newbie with that system , is , is it possible to have multiple engine on it ?

No, but you can either cluster the engine in an HA cluster, run backup frequently (I've had environments where I did an engine dump every hour without any issues), or use self hosted engine, which is basically the engine as a VM, so if a host goes down, it gets started on another. What you cannot do is have multiple engines load-balancing the work, like openstack controllers for example.

What happen if the engine server crash with some reason? can i load it on another cluster server?

If the engine goes down, the hosts and VMs keep working, so you have time to restore from backup or fix the engine without outages, besides a management outage of course. If you are running hosted engine, it will simply get started on another eligible host.

Please advice

Thanks

-- Tal Bar-or

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