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<div>We run this exact configuration with the exception that we are using OVS instead of linux bridge agent. On your "Network nodes" (those running metadata/dhcp) you need to configure them exactly like you do you compute services from the standpoint of the
L2 agent. Once we did that when the l2 agent starts it creates the bridges it cares about and the dhcp agent then gets plugged into those bridges. We didn't have to specifically create any bridges or manually plug vifs into it to get everything to work.</div>
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<div>I would be highly surprised if the linuxbridge agent acted any differently. Mainly because the dhcp agent consumes an IP/port on the network, no different than a vm would. So the L2 agent should plug it for you automatically.</div>
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<div>____________________________________________</div>
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<div>Kris Lindgren</div>
<div>Senior Linux Systems Engineer</div>
<div>GoDaddy, LLC.</div>
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<span style="font-weight:bold">From: </span>Daniele Venzano <<a href="mailto:daniele.venzano@eurecom.fr">daniele.venzano@eurecom.fr</a>><br>
<span style="font-weight:bold">Organization: </span>EURECOM<br>
<span style="font-weight:bold">Date: </span>Wednesday, April 8, 2015 at 4:21 AM<br>
<span style="font-weight:bold">To: </span>'Daniel Comnea' <<a href="mailto:comnea.dani@gmail.com">comnea.dani@gmail.com</a>><br>
<span style="font-weight:bold">Cc: </span>"<a href="mailto:openstack-operators@lists.openstack.org">openstack-operators@lists.openstack.org</a>" <<a href="mailto:openstack-operators@lists.openstack.org">openstack-operators@lists.openstack.org</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [Openstack-operators] Flat network with linux bridge plugin<br>
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<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Juno (from ubuntu cloud), on Ubuntu 14.04<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">From:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">
<a href="mailto:daniel.comnea@gmail.com">daniel.comnea@gmail.com</a> [<a href="mailto:daniel.comnea@gmail.com">mailto:daniel.comnea@gmail.com</a>]
<b>On Behalf Of </b>Daniel Comnea<br>
<b>Sent:</b> Wednesday 08 April 2015 11:29<br>
<b>To:</b> Daniele Venzano<br>
<b>Cc:</b> Sam Morrison; <a href="mailto:openstack-operators@lists.openstack.org">
openstack-operators@lists.openstack.org</a><br>
<b>Subject:</b> Re: [Openstack-operators] Flat network with linux bridge plugin<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Which release are you using it, on which OS ?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Wed, Apr 8, 2015 at 9:00 AM, Daniele Venzano <<a href="mailto:daniele.venzano@eurecom.fr" target="_blank">daniele.venzano@eurecom.fr</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Well, I found a way to make it work.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Yes, you need a bridge (brctl addbr ...).</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">You need to create it by hand and add the interfaces (physical and dnsmasq namespace) to
it.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">The linuxbridge agent installed on the network node does not do anything.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">The problem with this is that the interface for the namespace is created after an arbitrary
amount of time by one of the neutron daemons, so you cannot simply put the bridge creation in one of the boot scripts, but you have to wait for the interface to appear.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">From:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;"> Sam Morrison [mailto:<a href="mailto:sorrison@gmail.com" target="_blank">sorrison@gmail.com</a>]
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<b>Sent:</b> Wednesday 08 April 2015 05:46<br>
<b>To:</b> Daniele Venzano<br>
<b>Cc:</b> <a href="mailto:openstack-operators@lists.openstack.org" target="_blank">
openstack-operators@lists.openstack.org</a><br>
<b>Subject:</b> Re: [Openstack-operators] Flat network with linux bridge plugin</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi Daniele,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I’ve started playing with neutron too and have the exact same issue. Did you find a solution?<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Cheers,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Sam<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On 18 Feb 2015, at 8:47 pm, Daniele Venzano <<a href="mailto:Daniele.Venzano@eurecom.fr" target="_blank">Daniele.Venzano@eurecom.fr</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">Hello,</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">I’m trying to configure a very simple Neutron setup.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">On the compute nodes I want a linux bridge connected to a physical interface on one side and the VMs on the other
side. This I have, by using the linux bridge agent and a physnet1:em1 mapping in the config file.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">On the controller side I need the dhcp and metadata agents. I installed and configured them. They start, no errors
in logs. I see a namespace with a ns-* interface in it for dhcp. Outside the namespace I see a tap* interface without IP address, not connected to anything.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">I installed the linux bridge agent also on the controller node, hoping it would create the bridge between the physnet
interface and the dhcp namespace tap interface, but it just sits there and does nothing.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">So: I have VMs sending DHCP requests. I see the requests on the controller node, but the dhcp namespace is not connected
to anything.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">I can provide logs and config files, but probably I just need a hint in the right direction.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">On the network controller:</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">Do I need a bridge to connect the namespace to the physical interface?</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">Should this bridge be created by me by hand, or by the linuxbridge agent? Should I run the linuxbridge agent on
the network controller?</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">I do not want/have a l3 agent. I want to have just one shared network for all tenants, very simple.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">Thanks,</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">Daniele</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size: 9pt; font-family: Helvetica, sans-serif;">_______________________________________________<br>
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</span><a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators" target="_blank"><span style="font-size: 9pt; font-family: Helvetica, sans-serif; color: purple;">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators</span></a><o:p></o:p></p>
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_______________________________________________<br>
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<a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators</a><o:p></o:p></p>
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