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<p class="MsoNormal">It is my understanding that in multi-node setup :<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>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 ?)<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>nova-manage does DB operations and delegates the actual networking calls to nova-network process ?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is this understanding correct ?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I traced “nova-manage network create” and nova-manage network delete” using FlatDHCPManager (default for devstack/stack.sh)<o:p></o:p></p>
<p class="MsoNormal">Both these calls seem to be doing only DB operations.<o:p></o:p></p>
<p class="MsoNormal">BTW, nova-network process was shutdown during both “network create” and “network delete” – Still both operations were successful.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></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)<o:p></o:p></p>
<p class="MsoNormal">(via linux-net L3 driver)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></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.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></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">https://bugs.launchpad.net/nova/+bug/977738</a><o:p></o:p></p>
<p class="MsoNormal">and review : <a href="https://review.openstack.org/6451">https://review.openstack.org/6451</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I would like your comments and opinions which would help me understand “What nova-manage should and should NOT do”<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">-Mandar<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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