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</o:shapelayout></xml><![endif]--></head><body lang=CS link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Dan,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>that normally should not happen. Presuming you are running Neutron, it may be two things – either your DHCP agent died and the instances could not renew their IPs, or the DHCP client inside them died, or as third variant, your RabbitMQ bus is broken and the DHCP agents don</span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>’t have actual data.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Tomas<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"'> Dan Dong [mailto:dongdan39@gmail.com] <br><b>Sent:</b> Monday, April 10, 2017 2:48 PM<br><b>To:</b> openstack@lists.openstack.org<br><b>Subject:</b> [Openstack] VMs lost IP after running for few days on OpenStack Liberty.<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><div><div><p class=MsoNormal>Hi, Experts,<o:p></o:p></p></div><p class=MsoNormal> Recently I found VMs on my OpenStack Liberty will get lost their private IP address after running normally for 1~2 days("#ip addr" will show no IP associated with eth0 for example), thus could not be ssh login anymore. But after console login to the instances from Horizon and restart the network(# service network restart), everything returns normal and they could be ssh login again( eth0 now gets it IP). From nova-compute.log I see there are messages like "<span class=gmail-st>NeutronClientException: </span><em>Authentication required</em>". But the keystone service runs normally and no other service are affected.<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'> Any hint about the problem? Thanks a lot<span style='font-family:"MS Gothic"'>！</span><o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'> Cheers, Dan<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>