feat(energy_zone): Added Energy Zone Collector

[vimalk78]

• Added Energy Zone Collector
• Added Tests

❯ curl localhost:28282/metrics | grep _rapl_zone
# HELP kepler_node_rapl_zone Rapl Zones from sysfs
# TYPE kepler_node_rapl_zone gauge
kepler_node_rapl_zone{index="0",name="core",path="/sys/class/powercap/intel-rapl:0:0"} 1
kepler_node_rapl_zone{index="0",name="package",path="/sys/class/powercap/intel-rapl-mmio:0"} 1
kepler_node_rapl_zone{index="0",name="package",path="/sys/class/powercap/intel-rapl:0"} 1
kepler_node_rapl_zone{index="0",name="psys",path="/sys/class/powercap/intel-rapl:1"} 1
kepler_node_rapl_zone{index="0",name="uncore",path="/sys/class/powercap/intel-rapl:0:1"} 1

[codecov]

Codecov Report

Attention: Patch coverage is 74.19355% with 16 lines in your changes missing coverage. Please review.

Project coverage is 89.26%. Comparing base (2ad09ba) to head (e52bd2d).

Files with missing lines	Patch %	Lines
internal/exporter/prometheus/collector/procfs.go	37.50%	4 Missing and 1 partial ⚠️
internal/exporter/prometheus/collector/sysfs.go	37.50%	4 Missing and 1 partial ⚠️
...ternal/exporter/prometheus/collector/energyzone.go	91.66%	2 Missing and 1 partial ⚠️
internal/exporter/prometheus/prometheus.go	70.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           reboot    #2027      +/-   ##
==========================================
- Coverage   89.78%   89.26%   -0.53%     
==========================================
  Files          17       20       +3     
  Lines         999     1053      +54     
==========================================
+ Hits          897      940      +43     
- Misses         81       89       +8     
- Partials       21       24       +3     

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[sthaha]

How about cpuInfoProvider or something more specific to the cpuInfo?

[sthaha]

we should reuse cpuPowerMeter here since the raplReader removes non-standard rapl zones ( a functionality that we want to preserve here as well). Also when we implement filtering of zones, we should only show the zones that are filtered.

We could instead have an interface that raplPowerMeter satisfies which returns only the EnergyZones() which provides all information.

[vimalk78]

then we can have this metric as part of power collecor itself.

[sthaha]

Indeed, didn't think of that :)

[sthaha]

Can this refactor /reorg be a separate commit?

[vimalk78]

perhaps if this refactor was done, comment would ask for a refactor

[sthaha]

Requesting change to reuse existing power-meter that provides the zone information. We can add an Init which computes the zones information and cache it.

kepler_node_rapl_zone{index="0",name="package",path="/sys/class/powercap/intel-rapl-mmio:0"} 1

we shouldn't expose this.