----- Original Message -----
From: "Itamar Heim" <iheim@redhat.com> To: "Eli Mesika" <emesika@redhat.com> Cc: "engine-devel" <engine-devel@ovirt.org>, "Dan Kenigsberg" <danken@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