alert_cert_expire.yml

name: GHA to Check Key Vault Certificates Expiration

on:
  schedule:
    # The workflow runs every day at 8:07am
    - cron: "7 13 * * *"  #UTC-5

jobs:
  check-certificates:
    runs-on: ubuntu-latest
    steps:
      - name: Check Out Changes
        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938

      - name: Get runner ip
        id: runner_ip
        uses: ./.github/actions/runner-ip

      - name: Connect to VPN & Login into Azure
        uses: ./.github/actions/vpn-azure
        with:
          tls-key: ${{ secrets.TLS_KEY }}
          ca-cert: ${{ secrets.CA_CRT}}
          user-crt: ${{ secrets.USER_CRT }}
          user-key: ${{ secrets.USER_KEY }}
          sp-creds: ${{ secrets.SERVICE_PRINCIPAL_CREDS }}

      - name: Add Runner IP to Key Vault Firewall
        run: |
          az keyvault network-rule add --name pdhstaging-keyvault --ip-address ${{ steps.runner_ip.outputs.ip-address }}
          az keyvault network-rule add --name pdhprod-keyvault --ip-address ${{ steps.runner_ip.outputs.ip-address }}

      - name: List KeyVault Certificates in Prod & Staging
        id: cert_list
        run: |
          az keyvault certificate list --vault-name pdhprod-keyvault \
          --query "[?attributes.expires <= '$(date -u -d '+30 days' +%Y-%m-%dT%H:%M:%S.%NZ)'].{Name:name, Expiry:attributes.expires}" \
          -o json | jq -r '. | map("\(.Name) expires \(.Expiry)") | .[]' > certificates.json
          az keyvault certificate list --vault-name pdhstaging-keyvault \
          --query "[?attributes.expires <= '$(date -u -d '+30 days' +%Y-%m-%dT%H:%M:%S.%NZ)'].{Name:name, Expiry:attributes.expires}" \
          -o json | jq -r '. | map("\(.Name) expires \(.Expiry)") | .[]' >> certificates.json
          cat certificates.json

      - name: Format output
        id: format_out
        run: |
          EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
          echo "LIST<<$EOF" >> $GITHUB_OUTPUT
          cat certificates.json >> $GITHUB_OUTPUT
          echo "$EOF" >> $GITHUB_OUTPUT
      
      - name: Slack Notification
        if: ${{ steps.format_out.outputs.LIST  != '' }}
        uses: ./.github/actions/notifications
        with:
          method: slack
          title: These Certificates are expired or will expire in 30 days or less
          message: |
            ${{ steps.format_out.outputs.LIST }}
          icon-emoji: ':bell:'
          channel: pagerduty-alert-dump
          webhook-url: ${{ secrets.SLACK_WEBHOOK_URL }}
          color: warning

      - name: Remove Runner IP from the KeyVault Firewalls
        run: |
          az keyvault network-rule remove --name pdhstaging-keyvault --ip-address ${{ steps.runner_ip.outputs.ip-address }}
          az keyvault network-rule remove --name pdhprod-keyvault --ip-address ${{ steps.runner_ip.outputs.ip-address }}