.github/workflows/monitor-single-vm.yml

name: ~shut down a single VM

on:
  workflow_call:
    inputs:
      vm:
        type: string
        description: Name of VM
        required: true
      n_gpus:
        type: string
        description: Number of GPUs this VM has
        required: true

jobs:
  check-status-and-maybe-shutdown:
    environment: main
    runs-on: ${{ inputs.vm }}
    outputs:
      status: ${{ steps.status.outputs.main }}
    steps:
      - name: Check status
        id: status
        run: |
          docker run --rm --runtime=nvidia --gpus ${{ inputs.n_gpus }} ubuntu nvidia-smi

          NUM_GPUS=$(nvidia-smi --query-gpu=name --format=csv,noheader | wc -l)

          if [[ $NUM_GPUS -ne ${{ inputs.n_gpus }} ]]; then
            echo "Issues with GPU detected, will take this runner offline."
            echo "main=degraded" >> "$GITHUB_OUTPUT"
          else
            echo "main=healthy" >> "$GITHUB_OUTPUT"
          fi

      - name: Send Slack message & Disconnect runner from GitHub
        if: ${{ steps.status.outputs.main == 'degraded' || failure() }}
        run: |
          MESSAGE='{
            "blocks": [
              {
                "type": "section",
                "text": {
                  "type": "mrkdwn",
                  "text": ":alert: VM bot 🤖: Hey <!subteam^${{ secrets.SLACK_WEBHOOK_ADMIN }}>: VM `${{ inputs.vm }}` is having not the best day of their life, maybe bring them an apple or so."
                }
              }
            ]
          }'

          curl -X POST -H "Content-type: application/json" --data "$MESSAGE" ${{ secrets.SLACK_WEBHOOK }}

          cd /home/azureuser/actions-runner
          echo ${{ secrets.VM_KEY }} | sudo -S ./svc.sh stop