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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'>Thanks Eugene for putting together the various options. Option 4 (and to a certain extent, Option 3) should work us for integrating the Device driver. Is Option 4 is similar/same as per the <a href="https://review.openstack.org/">https://review.openstack.org/#/c/20579</a> with the Plugin Driver added?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Also, we talked about the Device Inventory Plugin Module to explicitly add devices to the system (with a separate DB Schema). Will this be supported? Also, can the vendor driver implement the logic of device selection as against the Plugin Driver/Device Scheduler choosing the device ?<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'>Also, to get the end to end vendor driver integration, need support for exception handling on the Agent side so that if there are any exceptions/errors happen while configuring the device, the device driver can propagate it to the Agent and Plugin.<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'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Pattabi<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><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> Sunday, April 28, 2013 11:37 PM<br><b>To:</b> OpenStack Development Mailing List<br><b>Cc:</b> Youcef Laribi<br><b>Subject:</b> [openstack-dev] Fwd: [Quantum][LBaaS] LBaaS development plan for Havana<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Folks, <o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Sorry, I forgot to 'reply all'. <o:p></o:p></p></div><div><p class=MsoNormal>Wiki page (<a href="https://wiki.openstack.org/wiki/Quantum/LBaaS/PluginDrivers" target="_blank"><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>https://wiki.openstack.org/wiki/Quantum/LBaaS/PluginDrivers</span></a> ) contains some possible ways of interacting between various components of lbaas.<o:p></o:p></p></div><div><p class=MsoNormal>Youcef, your model #5 is also possible, feel free to add it to the page. (Btw, I used <a href="http://websequencediagrams.com">websequencediagrams.com</a> to make pictures) <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>As for asynchronocity: I implied that 1st, 2nd, and 4th approach would use rpc 'cast' method, which is non-blocking. Agent then will call some plugin-side callback to acknowledge status of the object being CRUDed. <o:p></o:p></p></div><div><p class=MsoNormal>As for rest-proxy case (I hope I've chosen the right name for what Radware wants) - I think that it could be implemented just in the same way. If not then it would be responsibility of the driver or agent to provide that async behavior.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>In fact, I've been thinking a while about async drivers and came to conclusion that it's an overhead, because once we start talking to some in-quantum component via rpc it becomes in-quantum agent. <o:p></o:p></p></div><div><p class=MsoNormal>That has 2 consequences:<o:p></o:p></p></div><div><p class=MsoNormal>1) if you have such async driver, you should not use separate agent (or it would be plugin->(rpc) driver->(rpc) agent, which is an overhead)<o:p></o:p></p></div><div><p class=MsoNormal>2) you can't use main advantage of agents: load distribution across different hosts.<o:p></o:p></p></div><div><p class=MsoNormal>So currently I think we could be ok with 'sync' drivers until they do not wait for corresponding agent.<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><p class=MsoNormal style='margin-bottom:12.0pt'>---------- Forwarded message ----------<br>From: <b>Eugene Nikanorov</b> <<a href="mailto:enikanorov@mirantis.com">enikanorov@mirantis.com</a>><br>Date: Fri, Apr 26, 2013 at 4:15 PM<br>Subject: Re: [Quantum][LBaaS] LBaaS development plan for Havana<br>To: Youcef Laribi <<a href="mailto:Youcef.Laribi@eu.citrix.com">Youcef.Laribi@eu.citrix.com</a>><br><br><o:p></o:p></p><div><p class=MsoNormal>Hi Youcef,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I've added a page with workflows for cases that were described in the plan: <a href="https://wiki.openstack.org/wiki/Quantum/LBaaS/PluginDrivers" target="_blank">https://wiki.openstack.org/wiki/Quantum/LBaaS/PluginDrivers</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Regarding the box descriptions - I was hoping their meaning didn't change :) It's only that we now may have drivers at both plugin and agent side.<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><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Thu, Apr 25, 2013 at 11:22 PM, Youcef Laribi <<a href="mailto:Youcef.Laribi@eu.citrix.com" target="_blank">Youcef.Laribi@eu.citrix.com</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks Eugene. Could you for clarity add to the document a brief description of what each box in the diagram does, and what is the workflow of a user request for each of the 4 drivers you have in the picture?</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Youcef</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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:<a href="mailto:enikanorov@mirantis.com" target="_blank">enikanorov@mirantis.com</a>] </span><o:p></o:p></p><div><p class=MsoNormal><b>Sent:</b> Thursday, April 25, 2013 9:24 AM<br><b>To:</b> Sumit Naiksatam<o:p></o:p></p></div><p class=MsoNormal><b>Cc:</b> OpenStack Development Mailing List; Ilya Shakhat; Avishay Balderman; Mark McClain; Youcef Laribi; Salvatore Orlando<br><b>Subject:</b> Re: [Quantum][LBaaS] LBaaS development plan for Havana<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Sumit,<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>No, thanks for reminding! need to think how it will fit into the plan (at which step it would be easier to implement)<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Youcef, drivers are only vendor-specific in my diagram (both plugin-side drivers or agent-side drivers).<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Device Inventory or scehduling don't belong to drivers, but drivers could rely on them.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks,<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Eugene.<o:p></o:p></p></div></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Thu, Apr 25, 2013 at 8:09 PM, Sumit Naiksatam <<a href="mailto:sumitnaiksatam@gmail.com" target="_blank">sumitnaiksatam@gmail.com</a>> wrote:<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi Eugene,<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks. During the summit we discussed the notion of a logical loadbalancer/device which we later moved to calling a loadbalancer service instance (one or more tenant, as desired). Is this capture somewhere in the scheme of things?<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#888888'> </span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#888888'>~Sumit.</span><o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Thu, Apr 25, 2013 at 8:38 AM, Eugene Nikanorov <<a href="mailto:enikanorov@mirantis.com" target="_blank">enikanorov@mirantis.com</a>> wrote:<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi folks,<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I've prepared a list of a major action items needed for futher development of multivendor and production-ready LBaaS: <a href="https://wiki.openstack.org/wiki/Quantum/LBaaS/HavanaPlan" target="_blank">https://wiki.openstack.org/wiki/Quantum/LBaaS/HavanaPlan</a><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I'd be glad to here your feedback about it. <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I think we need to start discussing these items in more details.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Aside from this list I imply that vendors will create their drivers choosing whatever architecture is reasonable for their solution, while quantum provides convenient way of integrating them.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Also, as you can see, some of action items (like service insertion or device inventory) have scope beyond LBaaS so I expect folks who are interested in other services to participate in corresponding discussions.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks,<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Eugene.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>