OK can you show us: • The fixed IP you are trying to reach. From the compute node it is running on, are you able to ping it? • $iptables -L -nv -t nat • What is the floating IP ; does it appear on the iptables’ output command? • If you run $ip addr sh | grep $IP do you see the floating IP? (assuming you are using a multi_host mode, is that the case?)
Regards, Razique On Oct 28, 2013, at 1:59, Narayanan, Krishnaprasad <naray...@uni-mainz.de> wrote: > Hi Razique, > > They are located on different compute nodes and allow incoming connections. > The VMs that I referred have a fixed IP address. I could see the eth0 > interface and it has the fixed IP address. > > Thanks, > Krishnaprasad > From: Razique Mahroua [mailto:razique.mahr...@gmail.com] > Sent: Sonntag, 27. Oktober 2013 21:11 > To: Narayanan, Krishnaprasad > Subject: Re: [Openstack] VMs unable to communicate between each other using > their floating IPs > > Are all located on the same compute node? > And all the instances allow incoming connection? > > Finally make sure the instance you cannot reach have a private IP assigned > (not through the dash but check the logs to make sure the instance has indeed > an interface up ; usually eth0) > > - Razique > > On Oct 27, 2013, at 9:48, Narayanan, Krishnaprasad <naray...@uni-mainz.de> > wrote: > > > I could see a strange behavior. I restarted the nova-compute and > nova-network. I was able to reach certain floating IPs and few was not. Can I > know the reason behind this and some pointers to get rid of this problem? > > From: Razique Mahroua [mailto:razique.mahr...@gmail.com] > Sent: Sonntag, 27. Oktober 2013 17:26 > To: Narayanan, Krishnaprasad > Cc: Oleg Gelbukh; openstack@lists.openstack.org > Subject: Re: [Openstack] VMs unable to communicate between each other using > their floating IPs > > I think that restarting the nova-network and nova-compute services would be > sufficient :) > > On Oct 27, 2013, at 9:14, Narayanan, Krishnaprasad <naray...@uni-mainz.de> > wrote: > > > > Hi, > > 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? > > Regards, > Krishnaprasad > From: Oleg Gelbukh [mailto:ogelb...@mirantis.com] > Sent: Sonntag, 27. Oktober 2013 16:40 > To: Narayanan, Krishnaprasad > Cc: openstack@lists.openstack.org > Subject: Re: [Openstack] VMs unable to communicate between each other using > their floating IPs > > Narayan, > > Are you using multi-host? Is 'public_interface' in your nova.conf set? > > 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. > > 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. > > Hope that helps. > > -- > Best regards, > Oleg Gelbukh > Mirantis Labs > > > On Fri, Oct 25, 2013 at 11:41 PM, Narayanan, Krishnaprasad > <naray...@uni-mainz.de> wrote: > Hi all, > > 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. > > Can I know what is the reason and how to get rid of the problem? > > Thanks, > Krishnaprasad > > _______________________________________________ > Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack@lists.openstack.org > Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > > _______________________________________________ > Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack@lists.openstack.org > Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >
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