On Thu, Feb 27, 2014 at 02:14:32PM +0100, Johan Kooijman wrote:
Dan,
How about storing the rx_byte per 5 minutes in the engine DB? That way a reset of the counters has a minimal impact and analytics as "traffic for VM x in month Y" could be made.
Another approach could be to have iptables keep the count?
I do not see how iptables can help here. On the host, Vdsm reports how much traffic did VM x consume. However, when the VM is migrated to another host, the accounting at the destination are reset. If Engine simply copied the value, you can start month Y with 10GiB of traffic, and end it with 7KiB. This should be solved by Engine, probably by "banking" the Vdsm-reported values on certain occasions (vm shutdown, migration, counter reset), and exposing only the accumulated result. Dan.