On 03/12/2015 06:24 PM, Georgios Dimitrakakis wrote:
Hello!I am facing a rather weird issue and would like to know if anyone has faced it before and the way you have solved it (if any). Firstly, I 'd like to let you know that I am running Icehouse with Nova-Legacy Networking. I have an application that launches and terminates VMs very frequently and automatically assigns to them floating IP addresses. As a result if an IP has been used once then the second time that is being used cannot be reached for at least 20minutes (this is the time frame if the newly launched VM gets the same IP address from one that has just been terminated). Furthermore, this issue only happens when the second VM is launched on a different physical node (hypervisor) than the first one. I believe that I have identified the problem to be ARP Caching on the router side since if I do: arping -U -I {Interface-Name} {IP-Address} in order to update the ARP Caches of the neighbors immediately the new VM can be reached on its floating IP address. Is this the proper way of solving it? Can I somehow "instruct" OpenStack not to use the first available IP address everytime but on a random order or the one that hasn't been used for enough time? Any other thoughts?
Just a thought, have you tried enabling "send_arp_for_ha" in nova.conf? Chris _______________________________________________ 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
