[ovirt-devel] Killing XMLRPC on master

[Martin Sivak]

> Won't we miss all mom's smart policy if we do that?

- Mom uses getAllVmStats (and one or two others) for stats collection
and it polls for those atm. We can avoid that in the broker mode (VDSM
sends the stats to the engine and we can listen).
- Engine sends mom configuration through VDSM, but VDSM only converts
that to different format and forwards that to MOM. This can be
processed directly in MOM if VDSM knows how to ignore calls that are
not relevant for it.

We will have to call VDSM to set values, but that should be still possible.

Martin

On Mon, Jun 20, 2016 at 11:05 AM, Dan Kenigsberg <danken at redhat.com> wrote:
> On Mon, Jun 20, 2016 at 10:33:19AM +0200, Martin Sivak wrote:
>> > 1. Mom is still using xmlrpc
>> >
>> > Mom must move to jsonrpc.
>> > Martin: can you update on progress of this work?
>>
>> We would like to avoid going through VDSM completely, except from the
>> broker part. Is it possible now to "parasitically" listen to vdsm
>> events and engine commands without having to go through VDSM API?
>>
>> You can drop XML RPC,. vdsm does not depend on MOM working anymore.
>> Just the balloon and ksm stats will be missing from data that are
>> being sent to the engine.
>
> Won't we miss all mom's smart policy if we do that?
>>
>>
>> There also were some issues with eventfd in the json library, I assume
>> those are fixed now.
>>
>> Martin