[ovirt-users] Can HA Agent control NFS Mount?

[Doron Fediuck]

----- Original Message -----
> From: "Bob Doolittle" <bob at doolittle.us.com>
> To: "Doron Fediuck" <dfediuck at redhat.com>, "Andrew Lau" <andrew at andrewklau.com>
> Cc: "users" <users at ovirt.org>, "Jiri Moskovcak" <jmoskovc at redhat.com>, "Sandro Bonazzola" <sbonazzo at redhat.com>
> Sent: Monday, May 26, 2014 6:12:04 PM
> Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
> 
> 
> On 05/26/2014 02:38 AM, Doron Fediuck wrote:
> > Great to have your feedback guys!
> >
> > So just to clarify some of the issues you mentioned;
> >
> > Hosted engine wasn't designed for a 'single node' use case, as we do
> > want it to be highly available. This is why it's being restarted
> > elsewhere or even on the same server if no better alternative.
> 
> I hope you will keep this configuration in your design space as you move
> forward.
> As you can see it is likely to be a popular one. At a previous employer,
> everybody in our development group had a single (powerful) machine
> running VMware vSphere, with a hosted vCenter, to use as a development
> VM testbed.
> 
> It's likely to be popular for people with few resources who want to run
> in a fully supported configuration.
> 
> HA is great, but not every environment has the resources/requirement to
> support it. oVirt has a lot to offer even a leaner environment and I
> hope those environments continue to get attention as the product
> matures. For example, I hope there is a reasonable story around upgrades
> to future releases for single-node hosted configurations.
> 
> > Having said that, it is possible to set global maintenance mode
> > as a first step (in the UI: right click engine vm and choose
> > ha-maintenance).
> > Then you can ssh into the engine vm and init 0.
> 
> What is the recipe for a clean startup after shutdown?
> Can we do 'hosted-engine --vm-start' while the system is in Global
> Maintenance mode?
> 
> Thanks,
>      Bob
> 
> 

Hi Bob,
If all you need is a way to run VMs, then Kimchi[1] from the oVirt
eco-system can be a better solution, as it's designed for a single-node
use case. If you wish to run ovirt in a vm you can run a VM with Kimchi
and install the engine inside. Also, coming on 3.5 is the ovirt appliance[2]
which will simplify it. 

If I'm missing something please share your thoughts.

As for clean start after maintenance, I'd expect "hosted-engine --set-maintenance=none"
will allow the agent to start the VM automatically. If this is not the
case please let us know.

Thanks,
Doron

[1] https://github.com/kimchi-project/kimchi/wiki
[2] http://www.ovirt.org/Feature/oVirtAppliance