name: Setup logrotate for Laravel logs (incident prevention)

# Incident response prevention: 8.7G laravel.log заполнил диск (29.05.2026).
# Существующий daily rotation (laravel.log.1) недостаточен — за один день шторма
# accumulated 8.7G. Нужна size-based rotation с лимитом.
#
# This workflow installs /etc/logrotate.d/laravel-liderra config:
#   - size 50M (rotate when file >= 50MB, не daily)
#   - rotate 5 (keep 5 rotated copies)
#   - compress (gzip rotated files)
#   - copytruncate (atomic copy + truncate inode-preserving, Laravel handle continues)
#   - notifempty (skip if empty)
#   - su www-data www-data (correct ownership)
#
# Тестируется logrotate --debug сразу после установки.
#
# Ref: root-cause analysis incident 2026-05-29

on:
  workflow_dispatch:
    inputs:
      confirm_apply:
        description: 'Подтверждаю установку logrotate конфига на проде'
        required: true
        default: 'false'
        type: boolean

jobs:
  setup:
    runs-on: ubuntu-latest
    timeout-minutes: 5

    env:
      LIDERRA_HOST: 111.88.246.137
      LIDERRA_USER: ubuntu
      CONFIRM: ${{ github.event.inputs.confirm_apply }}

    steps:
      - name: Guard
        run: |
          if [[ "$CONFIRM" != "true" ]]; then
            echo "::error::confirm_apply=true required"
            exit 1
          fi

      - name: Setup SSH key
        run: |
          mkdir -p ~/.ssh
          echo "${{ secrets.LIDERRA_SSH_KEY }}" > ~/.ssh/liderra_deploy
          chmod 600 ~/.ssh/liderra_deploy
          ssh-keyscan -H ${{ env.LIDERRA_HOST }} >> ~/.ssh/known_hosts 2>/dev/null

      - name: Install logrotate config + verify
        run: |
          ssh -i ~/.ssh/liderra_deploy ${{ env.LIDERRA_USER }}@${{ env.LIDERRA_HOST }} \
            "bash -s" <<'REMOTE' | tee /tmp/logrotate-setup.log
          set +e

          echo "=== 1. Discover Laravel logs path ==="
          LARAVEL_LOG_DIR=""
          for candidate in /var/www/liderra/app/storage/logs /var/www/lidpotok/storage/logs; do
            if [[ -d "$candidate" ]]; then
              LARAVEL_LOG_DIR="$candidate"
              break
            fi
          done
          echo "LARAVEL_LOG_DIR=$LARAVEL_LOG_DIR"
          if [[ -z "$LARAVEL_LOG_DIR" ]]; then
            echo "::error::Cannot find Laravel logs directory"
            exit 1
          fi
          echo "Current sizes:"
          sudo du -sh "$LARAVEL_LOG_DIR"/*.log 2>/dev/null | head -10

          echo
          echo "=== 2. Write logrotate config to /etc/logrotate.d/laravel-liderra ==="
          sudo tee /etc/logrotate.d/laravel-liderra > /dev/null <<EOF
          $LARAVEL_LOG_DIR/*.log {
              size 50M
              rotate 5
              compress
              delaycompress
              missingok
              notifempty
              copytruncate
              su www-data www-data
              create 0644 www-data www-data
          }
          EOF
          echo "Wrote config:"
          sudo cat /etc/logrotate.d/laravel-liderra
          sudo chmod 0644 /etc/logrotate.d/laravel-liderra

          echo
          echo "=== 3. Verify config syntax via logrotate --debug ==="
          sudo logrotate --debug /etc/logrotate.d/laravel-liderra 2>&1 | head -30

          echo
          echo "=== 4. Trigger rotation now (--force) for clean state ==="
          sudo logrotate --force /etc/logrotate.d/laravel-liderra 2>&1 | tail -10

          echo
          echo "=== 5. PostgreSQL log rotation config ==="
          # Default Ubuntu postgresql-common rotates daily without size cap.
          # We override with size 100M / rotate 7 / postrotate SIGHUP (PG reopens log).
          # Higher alpha order than postgresql-common → processed later → wins on same files.
          sudo tee /etc/logrotate.d/postgresql-liderra > /dev/null <<EOF
          /var/log/postgresql/*.log {
              su postgres postgres
              size 100M
              rotate 7
              compress
              delaycompress
              missingok
              notifempty
              create 0640 postgres adm
              sharedscripts
              postrotate
                  # SIGHUP postmaster для re-open log file (standard PG idiom).
                  # PG holds log file handle open — без SIGHUP write goes to old (deleted) inode.
                  if [ -f /var/run/postgresql/16-main.pid ]; then
                      kill -HUP \$(cat /var/run/postgresql/16-main.pid) 2>/dev/null || true
                  fi
              endscript
          }
          EOF
          echo "Wrote /etc/logrotate.d/postgresql-liderra:"
          sudo cat /etc/logrotate.d/postgresql-liderra
          sudo chmod 0644 /etc/logrotate.d/postgresql-liderra

          echo
          echo "=== 6. Verify PG logrotate syntax ==="
          sudo logrotate --debug /etc/logrotate.d/postgresql-liderra 2>&1 | head -20

          echo
          echo "=== 7. Force PG log rotation now (clean state) ==="
          sudo logrotate --force /etc/logrotate.d/postgresql-liderra 2>&1 | tail -10

          echo
          echo "=== 8. AFTER: PG log directory state ==="
          sudo ls -lah /var/log/postgresql/ 2>&1 | head -10

          echo
          echo "=== 9. AFTER: Laravel log directory state ==="
          sudo ls -lah "$LARAVEL_LOG_DIR/" 2>&1 | head -20
          echo
          echo "=== 10. Disk free ==="
          df -h / 2>&1 | head -3

          echo
          echo "=== DONE ==="
          REMOTE

      - name: Print summary
        if: always()
        run: |
          {
            echo "## logrotate setup"
            echo
            echo '```'
            cat /tmp/logrotate-setup.log 2>/dev/null || echo "(no log)"
            echo '```'
          } >> "$GITHUB_STEP_SUMMARY"

      - name: Cleanup SSH key
        if: always()
        run: rm -f ~/.ssh/liderra_deploy