Fixed grouping of prometheus metrics

[MarcusWichelmann]

This PR fixes the grouping of metrics as required by: https://github.com/prometheus/docs/blob/master/content/docs/instrumenting/exposition_formats.md#grouping-and-sorting

Sample output:

# HELP DCGM_FI_DEV_GPU_TEMP GPU temperature (in C).
# TYPE DCGM_FI_DEV_GPU_TEMP gauge
DCGM_FI_DEV_GPU_TEMP{gpu="0",UUID="GPU-...",device="nvidia0",Hostname="..."} 49
DCGM_FI_DEV_GPU_TEMP{gpu="1",UUID="GPU-...",device="nvidia0",Hostname="..."} 55
DCGM_FI_DEV_GPU_TEMP{gpu="2",UUID="GPU-...",device="nvidia0",Hostname="..."} 54
DCGM_FI_DEV_GPU_TEMP{gpu="3",UUID="GPU-...",device="nvidia0",Hostname="..."} 54
# HELP DCGM_FI_DEV_POWER_USAGE Power draw (in W).
# TYPE DCGM_FI_DEV_POWER_USAGE gauge
DCGM_FI_DEV_POWER_USAGE{gpu="0",UUID="GPU-...",device="nvidia0",Hostname="..."} 32.227000
DCGM_FI_DEV_POWER_USAGE{gpu="1",UUID="GPU-...",device="nvidia0",Hostname="..."} 30.400000
DCGM_FI_DEV_POWER_USAGE{gpu="2",UUID="GPU-...",device="nvidia0",Hostname="..."} 31.178000
DCGM_FI_DEV_POWER_USAGE{gpu="3",UUID="GPU-...",device="nvidia0",Hostname="..."} 33.124000

[cloud-native-bot[bot]]

Hello There!

Thanks for your contribution! This repository is a read-only mirror of the following repository: https://gitlab.com/nvidia/container-toolkit/gpu-monitoring-tools

Do you mind:

• [ ] Opening a pull request against that repo?
• [ ] Making sure your work is signed: https://help.github.com/en/github/authenticating-to-github/signing-commits

Thanks again!

[MarcusWichelmann]

Okay, see https://gitlab.com/nvidia/container-toolkit/gpu-monitoring-tools/-/merge_requests/77