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Introduction

This module help with viewing and analyzing Varnish cache logs directly in Drupal. It monitors cache hit rates, filter requests by URL/status/cache status, and troubleshoot performance issues. It includes Drush commands for Acquia Cloud and restricted environments.

Features

  • Log Viewer: Browse recent Varnish access logs at /admin/reports/varnish-logs
  • Filtering: Filter by URL pattern, HTTP status code (200, 404, 500, etc.), and cache status (HIT/MISS/PASS)
  • Error Logs: Dedicated view for 4xx/5xx error responses
  • Statistics Dashboard: Cache hit/miss rates and request statistics
  • Drush Commands:
    • drush varnish:sync-logs: Sync logs to readable cache file
    • drush varnish:stats: Display cache statistics
    • drush varnish:tail: Real-time log tailing with filters
  • Acquia Cloud Support: Handles Acquia's extended log format

Post-Installation

  1. Enable the module with drush en varnish_log_viewer
  2. Configure the log file path at /admin/config/system/varnish-log-viewer
  3. If PHP cannot read logs directly (common on managed hosting), run drush varnish:sync-logs
  4. View logs at /admin/reports/varnish-logs

Additional Requirements

  • PHP 8.1 or higher
  • Drupal 10 or 11
  • Drush 12+ (for CLI commands)
  • Access to Varnish log files (varnishncsa format)

Recommended modules/libraries

Similar projects

  • Syslog
    Core logging to system log
  • DBLog
    Core database logging

Supporting this Module

  • Report issues in the issue queue
  • Submit patches or merge requests
  • Contribute documentation improvements
Supporting organizations: 
Acquia

Project information

Releases

1.0.0 released 20 July 2026
Works with Drupal: ^10 || ^11

View real-time Varnish cache logs and statistics in the Drupal admin. Filter by URL, status code, or cache status. Includes Drush commands for log syncing and Acquia Cloud support.

Install:

Using Composer to manage Drupal site dependencies