report power and thermal metrics

Registered by junjie.huang

This spec proposes to introduce host power and thermal related metrics,
which can be used to perform intelligent scheduling to improve the
cooling/power efficiency.

These metrics are Outlet temperature (Exhaust Air),Inlet temperature, Airflow,
System power and CPU power.

Nova-compute should be able to expose these on every node which supports IPMI
and NodeManager3.0 technology.

These metrics can be leveraged in Openstack by exposing it as a monitor.
This will follow a similar approach as the already existing monitor for CPU.

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
junjie.huang
Direction:
Needs approval
Assignee:
None
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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Gerrit topic: https://review.openstack.org/#q,topic:bp/power-thermal-metrics,n,z

Addressed by: https://review.openstack.org/312295
    Power and thermal metrics spec

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