Hi Mandar,<div><br></div><div>Thanks for bringing this up. For Essex, nova-manage commands to create/delete Quantum networks must be run on the nova-network node. For Folsom this will all change, as all networks will be created directly against the Quantum API, rather than using nova-manage. I'll add a note to the administrator guide, as this is not called there. Thanks!</div>
<div><br></div><div>Dan</div><div> </div><div><br><div class="gmail_quote">On Thu, Apr 12, 2012 at 1:38 AM, Vaze, Mandar <span dir="ltr"><<a href="mailto:Mandar.Vaze@nttdata.com" target="_blank">Mandar.Vaze@nttdata.com</a>></span> wrote:<br>
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<p class="MsoNormal">It is my understanding that in multi-node setup :<u></u><u></u></p>
<p><u></u><span style="font-family:Symbol"><span>·<span style="font:7.0pt "Times New Roman"">
</span></span></span><u></u>nova-manage can be executed from any machine which may not be running nova-network process. (Or should nova-manage always be run on nova-network node ?)<u></u><u></u></p>
<p><u></u><span style="font-family:Symbol"><span>·<span style="font:7.0pt "Times New Roman"">
</span></span></span><u></u>nova-manage does DB operations and delegates the actual networking calls to nova-network process ?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Is this understanding correct ?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I traced “nova-manage network create” and nova-manage network delete” using FlatDHCPManager (default for devstack/stack.sh)<u></u><u></u></p>
<p class="MsoNormal">Both these calls seem to be doing only DB operations.<u></u><u></u></p>
<p class="MsoNormal">BTW, nova-network process was shutdown during both “network create” and “network delete” – Still both operations were successful.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">But when using QuantumManager as network manager – nova-manage seems to be doing networking operations like “iptables-save” (during network create) and “kill_dhcp” (during network delete)<u></u><u></u></p>
<p class="MsoNormal">(via linux-net L3 driver)<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Since nova-manage command may be executed on a host which isn’t running nova-network – network commands like “iptables” and “kill -9 <pid of dnsmasq>” on host running nova-manage seems incorrect.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">For the first scenario (iptables-save during “network create” – there is already a defect in LP :
<a href="https://bugs.launchpad.net/nova/+bug/977738" target="_blank">https://bugs.launchpad.net/nova/+bug/977738</a><u></u><u></u></p>
<p class="MsoNormal">and review : <a href="https://review.openstack.org/6451" target="_blank">https://review.openstack.org/6451</a><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I would like your comments and opinions which would help me understand “What nova-manage should and should NOT do”<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks,<u></u><u></u></p>
<p class="MsoNormal">-Mandar<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
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