Open Stack

Hi,
I want to retrive Vm information from Openstack. I am interested of CPU &
RAM utilization.
I known that someone use collectd, libvirt ecc.. or product like Ceilometer
or Healthnmon.
I am also interested to receive alarm information from the cloud provider
if the CPU or RAM value exceeds a threshold.
I read that from Havana, Ceilometer and Healthnmon will be merged, it's
true? Might be a good solution to my problems?

Thanks in advance
Emanuel
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