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Anantha Raghava · "

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SUSE Linux GmbH, GF: Felix Imend=3DC3=3DB6rffer, Jane Smithard, Graham Nort=
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--=3D20
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Supervision r=3DC3=3DA9seau
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Hi,

where can I change the dns server for my hosts? I know the DNS entry is
part of the ifcfg-* file, but I tried to change it there and after a
reboot the old entry was restored from anywhere.

Kai

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I'm using ovirtmgmt network for migrations.

I'm guetting the vibe that using a dedicated network for migration is "good=
 practice"...

cordialement, regards, =

	Nelson LAMEIRAS =

Ing=C3=A9nieur Syst=C3=A8mes et R=C3=A9seaux / Systems and Networks enginee=
r =

Tel: +33 5 32 09 09 70 =

nelson.lameiras(a)lyra-network.com =

=
www.lyra-network.com | www.payzen.eu =

	=

	=

	=

Lyra Network, 109 rue de l'innovation, 31670 Lab=C3=A8ge, FRANCE

----- Original Message -----
From: "Konstantin Shalygin" <k0ste(a)k0ste.ru>
To: users(a)ovirt.org, "Nelson Lameiras" <nelson.lameiras(a)=
lyra-network.com>
Sent: Wednesday, April 19, 2017 3:15:29 AM
Subject: Re: Re: [ovirt-users] massive simultaneous vms migrations ?

Hello.

What is your Migration Network?

We have some hosts that have 60 vms. So this will cr=
eate a 60 vms migrating simultaneously.
Some vms are under so much heavy loads that migration fails often (our gues=
s is that massive simultaneous migrations does not help migration convergen=
ce) - even with "suspend workload if needed" migraton policy.

I'm using ovirtmgmt network for migrations.

I'm guetting the vibe that using a dedicated network for migration is "good=
=3D
 practice"...

cordialement, regards,=3D20

=3D09Nelson LAMEIRAS=3D20
Ing=3DC3=3DA9nieur Syst=3DC3=3DA8mes et R=3DC3=3DA9seaux / Systems and Netw=
orks enginee=3D
r=3D20
Tel: +33 5 32 09 09 70=3D20
nelson.lameiras(a)lyra-network.com=3D20

www.lyra-network.com | www.payzen.eu=3D
=3D20

=3D09
=3D09
=3D09

Lyra Network, 109 rue de l'innovation, 31670 Lab=3DC3=3DA8ge, FRANCE

----- Original Message -----
From: "Konstantin Shalygin" <k0ste(a)k0ste.ru>
To: users(a)ovirt.org, "Nelson Lameiras" <nelson.lameiras(a)lyra-network.com>
Sent: Wednesday, April 19, 2017 3:15:29 AM
Subject: Re: Re: [ovirt-users] massive simultaneous vms migrations ?

Hello.

What is your Migration Network?

We have some hosts that have 60 vms. So this will create a 60 =
=3D
vms migrating simultaneously.
Some vms are under so much heavy loads that migration fails often (our gues=
=3D
s is that massive simultaneous migrations does not help migration convergen=
=3D
ce) - even with "suspend workload if needed" migraton policy.

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--=3D20
Nathana=3DC3=3DABl Blanchet

Supervision r=3DC3=3DA9seau
P=3DC3=3DB4le Infrastrutures Informatiques
227 avenue Professeur-Jean-Louis-Viala
34193 MONTPELLIER CEDEX 5 =3D09
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Nathana=3DC3=3DABl Blanchet

Supervision r=3DC3=3DA9seau
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blanchet(a)abes.fr 
Hi,

I discovered an issue with my LACP configuration and i am having trouble =

figuring it out.  I am running 2 Dell Powered 610's with 4 broadcomm nics.  =

I am trying to bond them together, however only one of the nics goes active =

no mater how much traffic i push across the links.

I have spoken to my network admin, and says that the switch ports are =

configured and can only see one active link on the switch.

Thanks
Bryan
Once upon a time, Bryan Sockel  said:
> It seems that is some disconnect between my network bridge, the bond =3D
and my=3D20
> interfaces.  I would like to some how get my bond to use all 4 =3D
interfaces. =3D20
> On reboot, it always seems to reset consistently to EM1.

Are you sure the switch side is all the same LACP group?  Sounds like
one port may accidentally be in a separate group, and that happens to be
em1.

You might try swapping wires between em1 and another port and reboot and
see which ports come up - if all but the port with the wire formerly in
em1 come up, it points to the switch config.

--=3D20
Chris Adams 
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For what it's worth I set up my bond0 manually on CentOS before =3D
installing
ovirt hosted engine and the ovirtmgmt bridge "took over" from bond0..  =3D
But
it appears to still be working.  At least I've not noticed links being
down, and "ifconfig" shows decent amount of traffic on both eno1 and =3D
eno2.

Maybe wipe, re-install, configure it manually, and then install ovirt?

-derek

On Thu, April 20, 2017 8:58 pm, Bryan Sockel wrote:
> We checked the port groups, and servers are cabled correctly.
>
> After server is rebooted, em1 is the only interface passing traffic.
> Other 3 nics sitting idle.  We can down each port on the switch and
> confirm it is down on the server.
>
>
> I am pretty sure it is related to the bridge that was created to pass
> vm-host-altn traffic when the appliance was first installed.
>
>
>
> -------- Original message --------
> From: Chris Adams 
> Date: 4/20/17 5:40 PM (GMT-06:00)
> To: users(a)ovirt.org
> Subject: Re: [ovirt-users] LACP Bonding issue
>
>   _____
>
> From : Chris Adams [cma(a)cmadams.net]
> To : users(a)ovirt.org [users(a)ovirt.org]
> Date : Thursday, April 20 2017 17:40:25
> Once upon a time, Bryan Sockel  said:
>> It seems that is some disconnect between my network bridge, the bond
> and my
>> interfaces.  I would like to some how get my bond to use all 4
> interfaces.
>> On reboot, it always seems to reset consistently to EM1.
>
> Are you sure the switch side is all the same LACP group?  Sounds like
> one port may accidentally be in a separate group, and that happens to =3D
be
> em1.
>
> You might try swapping wires between em1 and another port and reboot =3D
and
> see which ports come up - if all but the port with the wire formerly =3D
in
> em1 come up, it points to the switch config.
>
> --
> Chris Adams
> _______________________________________________
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> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
> _______________________________________________
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> http://lists.ovirt.org/mailman/listinfo/users
>

--=3D20
       Derek Atkins                 617-623-3745
       derek(a)ihtfp.com             www.ihtfp.com
       Computer and Internet Security Consultant

I'll send a patch to upstream libvirt to fix this crash.=
  However it can take
a while to get it back to CentOS/RHEL.  The source of this crash is that you
have a "tun0" network interface without IP address and that interface is
checked before "ovirtmgmt" and it causes the crash.  You can workaround it
by removing the "tun0" interface if it doesn't have any IP address.

Pavel
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I'll send a patch to upstream libvirt to fix this cras=
h.  However it can take
a while to get it back to CentOS/RHEL.  The source of this crash is that you
have a "tun0" network interface without IP address and that interface is
checked before "ovirtmgmt" and it causes the crash.  You can workaround it
by removing the "tun0" interface if it doesn't have any IP address.

Pavel
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gluster volume create test-volume replica 2 transport tcp server1:/b1 server2:/b2 server3=
:/b3 server4:/b4
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Nelson LAMEIRAS
Ing=3DC3=3DA9nieur Syst=3DC3=3DA8mes et R=3DC3=3DA9s= eaux / Systems and Networks engineer
Tel: +33 5 32 09 09 70
nelson.lameiras(a)lyra-network.com =3D
www.lyra-network.com \| www.payzen.eu

Note on siz= =3D e of maximum memory

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