<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">+1 agree<br class=""><div><blockquote type="cite" class=""><div class="">On Feb 11, 2015, at 22:56, Girija Sharan <<a href="mailto:girijasharansingh@gmail.com" class="">girijasharansingh@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class=""><div class=""><div class=""><div class=""><div class="">Hi Janki,<br class=""><br class=""></div>I am totally agree with Chen.<br class=""></div>It seems you are new to Openstack, and therefore I would like to suggest you that it would be better if you follow three node installation.<br class=""></div>For that here is a reference link : <a href="https://github.com/ChaimaGhribi/OpenStack-Icehouse-Installation/blob/master/OpenStack-Icehouse-Installation.rst" class="">https://github.com/ChaimaGhribi/OpenStack-Icehouse-Installation/blob/master/OpenStack-Icehouse-Installation.rst</a><br class=""><br class=""></div>Thanks and Regards,<br class=""></div>Girija Sharan Singh<br class=""></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Thu, Feb 12, 2015 at 11:38 AM, Li, Chen <span dir="ltr" class=""><<a href="mailto:chen.li@intel.com" target="_blank" class="">chen.li@intel.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div class=""><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class="">Hi,<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class="">From my understanding:<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""><u class=""></u> <u class=""></u></span></p><p style="margin-left:18.0pt" class="">
<u class=""></u><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""><span class="">1.<span style="font:7.0pt "Times New Roman"" class="">
</span></span></span><u class=""></u><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class="">Namespace is created by neutron-dhcp-agent.<u class=""></u><u class=""></u></span></p><p style="margin-left:18.0pt;text-indent:0cm" class=""><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class="">You can run neutron-dhcp-agent anywhere you want.<u class=""></u><u class=""></u></span></p><p style="margin-left:18.0pt;text-indent:0cm" class=""><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class="">It is common to run neutron-dhcp-agent on control node, but it is not a “MUST” demand.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""> I won’t say the network “</span><span lang="EN-US" class="">is created in Compute node</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class="">
”, a network is created in neutron, it related information stored in database.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""> After an instance start, it is neutron’s job to make sure the instance is working under a certain network.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""> If you don’t start any instance, nothing real would happen in compute node.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""><u class=""></u><u class=""></u></span></p><p style="margin-left:18.0pt" class="">
<u class=""></u><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""><span class="">2.<span style="font:7.0pt "Times New Roman"" class="">
</span></span></span><u class=""></u><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class="">Basically , br-ex is used for L3.
<u class=""></u><u class=""></u></span></p><p style="margin-left:18.0pt;text-indent:0cm" class=""><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class="">If you don’t use floating IP, br-ex can be removed.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""><u class=""></u> <u class=""></u></span></p><p style="margin-left:18.0pt" class="">
<a name="14b7c6c3c8344d30__MailEndCompose" class=""><u class=""></u><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""><span class="">3.<span style="font:7.0pt "Times New Roman"" class="">
</span></span></span><u class=""></u><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class="">Control node is not connected to VM network, dnsmasq (DHCP server) started by dhcp-agent connect to VM network, so VM can get IP address.<u class=""></u><u class=""></u></span></a></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class="">Thanks.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class="">-chen<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d" lang="EN-US" class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><b class=""><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US" class="">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"" lang="EN-US" class=""> Janki Chhatbar [mailto:<a href="mailto:jankihchhatbar@gmail.com" target="_blank" class="">jankihchhatbar@gmail.com</a>]
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<b class="">Sent:</b> Thursday, February 12, 2015 1:05 PM<br class="">
<b class="">To:</b> <a href="mailto:openstack@lists.openstack.org" target="_blank" class="">openstack@lists.openstack.org</a><br class="">
<b class="">Subject:</b> [Openstack] Namespaces and network<u class=""></u><u class=""></u></span></p><div class=""><div class="h5"><p class="MsoNormal"><span lang="EN-US" class=""><u class=""></u> <u class=""></u></span></p>
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<div class=""><p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US" class="">Hi ALL<u class=""></u><u class=""></u></span></p>
</div><p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US" class="">I have doubts.<u class=""></u><u class=""></u></span></p>
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<div class=""><p class="MsoNormal"><span lang="EN-US" class="">I am having a 3 node architecture with Neutron.<u class=""></u><u class=""></u></span></p>
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</div><p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US" class="">1. Whenever we create a network, it is created in Compute node and its namespace is stored in Control node. Instances will be created in compute node. Is my understanding correct?<u class=""></u><u class=""></u></span></p>
</div><p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US" class="">2. Why do we need 2 ovs bridges br-int, br-ex. Cant we have just br-int and attach physical eth to it instead of attaching it to br-ex.<u class=""></u><u class=""></u></span></p>
</div><p class="MsoNormal"><span lang="EN-US" class="">3. There are 3 types of networks namely, internal network which will carry internal data, VM network connecting VMs and external network connected to internet. My question is why is control node is connected to VM network.
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<div class=""><p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-US" class="">Janki Chhatbar</span><span lang="EN-US" class=""><u class=""></u><u class=""></u></span></p>
</div><p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-US" class="">M.Tech (Embedded Systems)</span><span lang="EN-US" class=""><u class=""></u><u class=""></u></span></p>
</div><p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-US" class="">Nirma University</span><span lang="EN-US" class=""><u class=""></u><u class=""></u></span></p>
</div><p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-US" class="">(+91) 9409239106</span><span lang="EN-US" class=""><u class=""></u><u class=""></u></span></p>
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