healthcheck.yaml

name: Health Check

on:
  schedule:
    - cron: '*/10 * * * *'
  workflow_dispatch:

jobs:
  health-check:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Install yq
        run: |
          sudo wget https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64 -O /usr/bin/yq
          sudo chmod +x /usr/bin/yq

      - name: Read URLs and Check Health
        id: healthcheck
        run: |
          FAIL_LIST=""
          for url in $(yq '.urls[]' .github/urls.yaml); do
            echo "Checking $url"

            set +e
            code=$(curl -s -o /dev/null -w "%{http_code}" "$url")
            ret=$?
            set -e
            
            if [ "$ret" -ne 0 ]; then
              code="000"
            fi

            if [ "$code" -ne 200 ]; then
              echo "$url is DOWN (status $code)"
              FAIL_LIST+="$url (status code $code)\n"
            else
              echo "$url is OK"
            fi
          done

          if [ -n "$FAIL_LIST" ]; then
            echo "fail_list<<EOF" >> $GITHUB_OUTPUT
            echo -e "$FAIL_LIST" >> $GITHUB_OUTPUT
            echo "EOF" >> $GITHUB_OUTPUT
            echo "FAILED=true" >> $GITHUB_ENV
          fi

      - name: Send Discord Alert if Any Site Fails
        if: env.FAILED == 'true'
        run: |
          MESSAGE=$(echo -e ":x: Health Check Failed!\n\`\`\`\n${{ steps.healthcheck.outputs.fail_list }}\n\`\`\`")
          PAYLOAD=$(jq -nc --arg content "$MESSAGE" '{content: $content}')
          curl -H "Content-Type: application/json" \
               -X POST \
               -d "$PAYLOAD" \
               ${{ secrets.DISCORD_WEBHOOK }}