On Thu, May 10, 2018 at 1:59 AM, Yedidyah Bar David <[email protected]> wrote:
> On Wed, May 9, 2018 at 5:36 PM, Gianluca Cecchi > <[email protected]> wrote: > > > > > > On Wed, May 9, 2018 at 4:32 PM, Simone Tiraboschi <[email protected]> > > wrote: > >> > >> > >> > >> On Wed, May 9, 2018 at 4:21 PM, Gianluca Cecchi > >> <[email protected]> wrote: > >>> > >>> Hello, > >>> suppose I have an environment with self hosted engine environment in > 4.1 > >>> > >>> How is it generated the hw address of the virtual nic of the engine vm > >>> when I deploy using cockpit? > >>> > >>> Suppose on a lan I already have a self hosted engine environment and I'm > >>> going to create another one on the same lan, is there any risck of hw > >>> address collision for the engine? > Unfortunately, the MAC address is hard-coded in the most recent release, which will cause collisions if you're deploying a second hosted engine environment on the same LAN. As a workaround, you can edit the hard-coded address in the cockpit UI, or as you're already aware, the CLI version will generate one for you if you use it. I pushed a patch [1] yesterday to correct the issue in cockpit, so the issue should be resolved as of the next release. I also opened a bug [2] to track it, as well. I apologize for the inconvenience. [1] https://gerrit.ovirt.org/#/c/91111/ [2] https://bugzilla.redhat.com/show_bug.cgi?id=1576783 > >>> > >>> I know that from inside web admin console I can then set the hw address > >>> ranges for the VMs, but what about the mac of the engine vm itself? > >>> > >>> At the moment I have only lan access and so crosschecked an RHV 4.1 > >>> environment and I see that the engine has hw addr 00:16:3e:7c:65:34 (a > >>> lookup seems to associate to "Xensource, Inc.") while the VMs have > their hw > >>> addr in the range 00:1a:4a:16:01:51 - 00:1a:4a:16:01:e6 (eg the > >>> 00:1a:4a:16:01:56) (a lookup seems to associate to "Qumranet Inc.". > >>> > >>> Does this mean that the engine has a sort of dedicated range? Any risk > of > >>> collision or is a query on the lan done before assigning it? > >> > >> > >> It has been discussed here: > >> https://bugzilla.redhat.com/show_bug.cgi?id=1244502 > >> > >> In a few worlds: the proposed HE MAC address are explicitly on a > different > >> range just to minimize collision risks on complex scenarios. > >> > > > > > > Thanks Sandro, > > Indeed I forgot that as part of the engine deploy (from cockpit but it > > should be the same from the deprecated command line setup too) there is > the > > explicit option to specify hw address of its vnic. > > In my case I'm proposed this one: > > " > > You may specify a unicast MAC address for the VM or accept a randomly > > generated default [00:16:3e:15:6a:e5]: > > " > > So I should be in the safe place, as I have only one other engine vm and > I > > have no Xen based environments... > > I also filed around the same time: > > https://bugzilla.redhat.com/show_bug.cgi?id=1516445 > > Feel free to comment/vote/etc... > > Best regards, > -- > Didi > _______________________________________________ > Users mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
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