Re: [Engine-devel] [Design for 3.2 RFE] Improving proxy selection algorithm for Power Management operations
----- Original Message -----
From: "Itamar Heim" <iheim(a)redhat.com>
To: "Eli Mesika" <emesika(a)redhat.com>
Cc: "engine-devel" <engine-devel(a)ovirt.org>, "Dan Kenigsberg"
<danken(a)redhat.com>
Sent: Thursday, November 8, 2012 5:25:48 PM
Subject: Re: [Engine-devel] [Design for 3.2 RFE] Improving proxy selection algorithm for
Power Management operations
On 11/07/2012 08:43 PM, Eli Mesika wrote:
> Hi
>
> Please review , any comments are welcomed
>
> Requirements :
> http://wiki.ovirt.org/wiki/Features/HostPMProxyPreferences
> Detailed Design :
> http://wiki.ovirt.org/wiki/Features/Design/DetailedHostPMProxyPreferences
>
> DR for this RFE will be next week, exact schedule & place will
> follow.
1. what's the logic on deciding to move to next proxy ? is it per
action
(restart being comprised of stop and start. can the stop and start
happen from different proxies)?
Yes, it is per action so stop & start may use different proxies.
2. I'm guessing for 'engine' as proxy, vdsm will be installed with
engine on same host.
is the plan to teat it as a separate instance of vdsm, listening on a
separate port, or to assume an all-in-one deployment always?
if it is added as a host, just for fencing, it requires special
treatment for that host. while if added as a separate instance (on a
different tcp port), it doesn't have to be defined as a host in the
system.
iirc, we can install vdsm, and launch multiple instances of it (at
least
we could in the past).
we have 3 options here
1) VDSM instance
2) Lightweight VDSM (with only PM abilities)
3) Accessing the fenece-agents package scripts directly
I have talked with danken , he think we should apply 3)
3. i didn't understand the fqdn/ip proxy mode, if it is not an
existing
host in the system, how will engine communicate with it over secure
xml/rpc? (i can understand selecting a specific host, but not a text
box
for fqdn/ip).
Good point, I will change the design accordingly
thanks,
Itamar