Report power metrics

[Yadnesh Kulkarni]

Ceilometer reports Power metrics(W) under meter name "hardware.ipmi.current".
~~~
[stack@devstack ~]$ openstack metric list | grep -i current
| 4ccdc967-d5a3-47d5-b4ea-db0d873f7e6f | ceilometer-low | hardware.ipmi.current | Amps | f961d7de-230b-58e0-a27f-ba9d5da48fe4 |
| a2be34ce-57e7-4618-adf8-878dc554c696 | ceilometer-low | hardware.ipmi.current | W | 718889f7-01da-5fd2-9450-977928b087b4 |
~~~

This happens because ipmitool generates Power metrics with Current metrics and Ceilometer is not able to differentiate between the two.

Ceilometer executes below command to capture Current metrics.
~~~
[stack@devstack ~]$ sudo ipmitool -v sdr type Current
Sensor ID : Current 1 (0x6b)
 Entity ID : 10.1 (Power Supply)
 Sensor Type (Threshold) : Current (0x03)
 Sensor Reading : 0.800 (+/- 0) Amps
 Status : ok
 Nominal Reading : 0.000
 Normal Maximum : 0.000
 Positive Hysteresis : Unspecified
 Negative Hysteresis : Unspecified
 Minimum sensor range : Unspecified
 Maximum sensor range : Unspecified
 Event Message Control : Per-threshold
 Readable Thresholds : No Thresholds
 Settable Thresholds : No Thresholds
 Assertion Events :
 Assertions Enabled :

Sensor ID : Pwr Consumption (0x76)
 Entity ID : 7.1 (System Board)
 Sensor Type (Threshold) : Current (0x03)
 Sensor Reading : 132 (+/- 0) Watts
 Status : ok
 Nominal Reading : 1034.000
 Normal Maximum : 1056.000
 Upper critical : 1914.000
 Upper non-critical : 1738.000
 Positive Hysteresis : Unspecified
 Negative Hysteresis : Unspecified
 Minimum sensor range : Unspecified
 Maximum sensor range : 5588.000
 Event Message Control : Per-threshold
 Readable Thresholds : unc ucr
 Settable Thresholds : unc
 Assertion Events :
 Assertions Enabled : unc+ ucr+
 Deassertions Enabled : unc+ ucr+
~~~

Power metrics should be reported under the meter name "hardware.ipmi.power"

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/ceilometer 22.0.0.0rc1 release candidate.