[ovirt-devel] OVN provider's firewalld services deployment during engine setup

[Yedidyah Bar David]

On Mon, Jun 19, 2017 at 9:45 AM, Dan Kenigsberg <danken at redhat.com> wrote:
> On Sun, Jun 18, 2017 at 5:18 PM, Yaniv Kaul <ykaul at redhat.com> wrote:
>>
>>
>> On Sun, Jun 18, 2017 at 2:17 PM, Dan Kenigsberg <danken at redhat.com> wrote:
>>>
>>> On Tue, Jun 13, 2017 at 10:33 AM, Martin Perina <mperina at redhat.com>
>>> wrote:
>>> > Will OVN provider be mandatory for all engine 4.2 installation? Can OVN
>>> > provider be installed on different host than engine? If not mandatory or
>>> > "may be on different host", then it should be handled similar way as
>>> > DWH, so
>>> > it should be in separate package and it's engine-setup part should also
>>> > be
>>> > in separate package.
>>>
>>> In 4.2, OVN provider is configured by default on the Engine host, but
>>> the user can opt to avoid that. He can then configure the provider
>>> manually, and add it manually to Engine. We have already limited the
>>> automatic configuration of OVN to the case of it running on the same
>>> host.
>>>
>>> When looked from this perspective, adding an explicit rpm-level
>>> Requires, does not make things much worse, it only makes reality
>>> visible.
>>>
>>> > And even if we don't support OVN on different host in
>>> > 4.2, we can prepare for the future ...
>>>
>>> A big question is whether that future includes installing things on a
>>> remote host (as in DWH), or alternatively spawning a container.
>>> Implementing the OVN deployment to the Engine machine took quite a big
>>> effort[1]. I worry that extending it to allow remote host would be
>>> even more consuming, it's not a minor preparation but a mid-size
>>> feature on its own.
>>
>>
>> I'm not sure anyone answered how heavy (CPU, memory, disk size) it is on the
>> Engine.
>
> On another thread, Sandro mentioned the effect on disk size: +17Mb, +2%.
>
> CPU and Memory are much harder to estimate, as they depend on the
> number of networks and hosts controlled by OVN. Mor, can you provide
> numbers for a small cluster that you tested?

I believe these are irrelevant if the user opts to not configure/run
OVN on the engine machine. My (not sure about Yaniv's) question was only
about disk space, which iiuc is the only implication of making engine
Require: ovn. Still, if possible, it will be useful if someone can
provide cpu/memory use, and also the list of dependencies for the ovn
package (and the provider package) - especially if there are ones that
are not from the base OS.

>
> Dan.
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-- 
Didi