Virtual machine metrics

[melmaliacone]

Provides support for scraping Azure Virtual Machines

Example configuration:

name: demo_virtualmachine_percentage_cpu
description: "Average percentage cpu usage of our 'promitor-virtual-machine' virtual machine"
resourceType: VirtualMachine
virtualMachineName: promitor-virtual-machine
azureMetricConfiguration:
  metricName: Percentage CPU
  aggregation:
    type: Average

Closes #309

[promitor-bot]

Docker image for this PR was built and is available on Docker Hub.

You can pull it locally via the CLI:

docker pull tomkerkhove/promitor-agent-scraper-ci:pr454

Want to verify the new version? Run it locally:

docker run -d -p 8999:80 --name promitor-scraper-pr454 \
                         --env PROMITOR_AUTH_APPID='<azure-ad-app-id>' \
                         --env PROMITOR_AUTH_APPKEY='<azure-ad-app-key>' \
                         --volume C:/Promitor/metrics-declaration.yaml:/config/metrics-declaration.yaml \
                         tomkerkhove/promitor-agent-scraper-ci:pr454

[tomkerkhove]

Thank you @michellemcone ! 🎉