AZ400-327. Implement Grafana Dashboard to get node exporter metrics

[kolosovpetro]

v1.0.0 - In Progress

Changed

• Provisioned 3 virtual machines using Terraform modules
• Windows WinRM configured using Azure custom script extensions and Terraform
• Linux target node is provisioned with NGINX using Terraform file and remote-exec provisioners
• Windows target node is configured with node exporter and IIS using Terraform file and remote-exec provisioners
• Cloudflare DNS records are updated automatically via PowerShell using the IP addresses from Terraform state
• Azure custom script extension module for Linux is available too, but not used for the moment
• Whole infrastructure provision is fully automated using Terraform and Azure pipelines
• SSH keys copied securely inside Azure pipelines
• Fixed file encodings (BOM characters, EOL) to make sure consistent provision in Azure pipelines agent and locally
• Setup sudo add-apt-repository in non-interactive mode
• Efficient automatic upgrade of Linux system packages using Terraform remote-exec provisioners and Bash
• Efficient automatic provision of Prometheus server using Bash and Terraform remote-exec
  provisioners
• Efficient automatic provision of Linux node exporter for Prometheus using Bash and Terraform remote-exec
  provisioners
• Added PowerShell scripts for quick start and stop of VMs using Az PowerShell
• Deploy grafana
• Update readme
• Allow grafana port in NSG