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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Eugene,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks for the update. This looks a good plan for Grizzly.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>One question on the time we select a device. Do we call the scheduler to select a device (given a certain service type) at the time of the pool creation or at the time of the vip creation?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Youcef<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> <o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></a></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Eugene Nikanorov [mailto:enikanorov@mirantis.com] <br><b>Sent:</b> Tuesday, January 22, 2013 7:21 AM<br><b>To:</b> OpenStack Development Mailing List<br><b>Subject:</b> [openstack-dev] [Quantum][LBaaS] Scheduling & device management for LBaaS<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi folks,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I'd like to present blueprint <a href="https://blueprints.launchpad.net/quantum/+spec/quantum-service-scheduler">https://blueprints.launchpad.net/quantum/+spec/quantum-service-scheduler</a> which I feel needs to be in grizzly.<o:p></o:p></p></div><div><p class=MsoNormal>You can find more detailed description in specification page.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Initially we planned to have comprehensive device management as separate plugin with extension and complicated schedulers.<o:p></o:p></p></div><div><p class=MsoNormal>However due to the lack of time and reviewer resources we desided to greatly reduce the scope of this work.<o:p></o:p></p></div><div><p class=MsoNormal>So, currently the code on review ( <a href="https://review.openstack.org/#/c/20225/">https://review.openstack.org/#/c/20225/</a> ) introduces the following:<o:p></o:p></p></div><div><p class=MsoNormal>1) Configuration management for service schedulers, e.g. admin can configure particular scheduler for particular service type<o:p></o:p></p></div><div><p class=MsoNormal>2) Simplistic scheduler for lbaas:<o:p></o:p></p></div><div><p class=MsoNormal> - scheduling algorithm that randomly chooses a device from list of devices<o:p></o:p></p></div><div><p class=MsoNormal> - device manager that reads devices from predefined conf-file (suggestion from Salvatore)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I believe this is reasonable minimum that will allow to use LBaaS service at least with some convenience. <o:p></o:p></p></div><div><p class=MsoNormal>(In fact, I'd provide some more scheduling algorithms)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>We have also started to integrate this code with code of <a href="https://blueprints.launchpad.net/quantum/+spec/lbaas-agent-and-rpc" title="Agent-based Loadbalancer Plugin"><span style='font-size:9.0pt;font-family:"Tahoma","sans-serif";color:#0033AA;background:white'>lbaas-agent-and-rpc</span></a> according to the call sequence diagram:<o:p></o:p></p></div><div><p class=MsoNormal><a href="http://wiki.openstack.org/Quantum/LBaaS/Architecture/Scheduler">http://wiki.openstack.org/Quantum/LBaaS/Architecture/Scheduler</a><o:p></o:p></p></div><div><p class=MsoNormal>So we plan that this code will be base patch for <a href="https://blueprints.launchpad.net/quantum/+spec/lbaas-agent-and-rpc" title="Agent-based Loadbalancer Plugin"><span style='font-size:9.0pt;font-family:"Tahoma","sans-serif";color:#0033AA;background:white'>lbaas-agent-and-rpc</span></a>.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks,<o:p></o:p></p></div><div><p class=MsoNormal>Eugene.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>