<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">I think that restarting the nova-network and nova-compute services would be sufficient :)<div><br><div><div>On Oct 27, 2013, at 9:14, Narayanan, Krishnaprasad <<a href="mailto:narayana@uni-mainz.de">narayana@uni-mainz.de</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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<div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi,<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks for your response. I don’t see this setting in my nova.conf. Will it be possible for you to describe the complete command of recreating the floating
IPs with –interface flag?<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </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">Krishnaprasad<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""> Oleg Gelbukh [<a href="mailto:ogelbukh@mirantis.com">mailto:ogelbukh@mirantis.com</a>]
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<b>Sent:</b> Sonntag, 27. Oktober 2013 16:40<br>
<b>To:</b> Narayanan, Krishnaprasad<br>
<b>Cc:</b> <a href="mailto:openstack@lists.openstack.org">openstack@lists.openstack.org</a><br>
<b>Subject:</b> Re: [Openstack] VMs unable to communicate between each other using their floating IPs<o:p></o:p></span></p><p class="MsoNormal"><o:p> </o:p></p>
<div><p class="MsoNormal">Narayan,<o:p></o:p></p>
<div><p class="MsoNormal"><o:p> </o:p></p>
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<div><p class="MsoNormal">Are you using multi-host? Is 'public_interface' in your nova.conf set?<o:p></o:p></p>
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<div><p class="MsoNormal">Recently we've had similar situation with a customer. Turned out that traffic going from VM's fixed IP to floating IP of another VM on the same physical host never gets to public interface and thus never SNATed, and response never gets
back.<o:p></o:p></p>
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<div><p class="MsoNormal"><o:p> </o:p></p>
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<div><p class="MsoNormal">We fixed it by unsetting 'public_interface' and re-creating floating IPs with --interface=<public_interface> flag. It ensures that all packets from VMs are source-translated, and also that floating IPs are assigned to correct interface.<o:p></o:p></p>
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<div><p class="MsoNormal">Hope that helps.<o:p></o:p></p>
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<div><p class="MsoNormal"><o:p> </o:p></p>
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<div><p class="MsoNormal">--<o:p></o:p></p>
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<div><p class="MsoNormal">Best regards,<br>
Oleg Gelbukh<o:p></o:p></p>
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<div><p class="MsoNormal">Mirantis Labs<o:p></o:p></p>
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<div><p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
<div><p class="MsoNormal">On Fri, Oct 25, 2013 at 11:41 PM, Narayanan, Krishnaprasad <<a href="mailto:narayana@uni-mainz.de" target="_blank">narayana@uni-mainz.de</a>> wrote:<o:p></o:p></p>
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<div><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE">Hi all,</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE"> </span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Im my OpenStack setup, i am using nova-network to manage the networks. I could see that the VMs are unable to communicate between each other via their floating IPs.<o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Can I know what is the reason and how to get rid of the problem?<o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thanks,<o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Krishnaprasad<o:p></o:p></p>
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