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?
Regards,
George
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