gh_runner-scheduler.yml

name: GitHub Runner Job AutoScaler

on:
  workflow_dispatch:
  schedule:
    - cron: '0 07 * * MON-FRI'
    - cron: '0 16 * * MON-FRI'

permissions:
  id-token: write
  contents: read

env:
  resource-group: 'io-p-github-runner-rg'
  job-name: 'io-p-infra-github-runner-job'
  maximum_replica: 10

jobs:
  scheduler:
    runs-on: ubuntu-22.04
    environment: prod-runner
    steps:
      - name: Azure Login
        id: login
        uses: azure/login@92a5484dfaf04ca78a94597f4f19fea633851fa2
        with:
          client-id: ${{ secrets.AZURE_CLIENT_ID }}
          tenant-id: ${{ secrets.AZURE_TENANT_ID }}
          subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}

      - name: Increase minimum replicas
        if: github.event.schedule == '0 07 * * MON-FRI'
        run: |
          az containerapp job update \
            --resource-group ${{ env.resource-group }} \
            --name ${{ env.job-name }} \
            --min-executions 1 \
            --max-executions ${{ env.maximum_replica }}

      - name: Decrease minimum replicas
        if: github.event.schedule == '0 16 * * MON-FRI'
        run: |
          az containerapp job update \
            --resource-group ${{ env.resource-group }} \
            --name ${{ env.job-name }} \
            --min-executions 0 \
            --max-executions ${{ env.maximum_replica }}