An abstract logstreaming visualization focusing on layers of the stack and caching
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Description and Use

Wowstream is a set of experimental visualizations for Acquia's Logstreaming API. It intends to abstractly visualize log data in a way that's nice-looking and accurate.

This is a demo tool, and is not intended to be run on a production site or to be publicly accessible.

Stack Ring Demo

This is the default demo, and should appear at the base of your site.

When a request log is received, it is shown on the outside layer of the stack. It then travels towards the center of the stack until the request is terminated, usually either at Varnish, Apache, or Drupal.

You can use the pause button to stop streaming, which allows you to click individual requests and see the full log message from Logstream.

The cache statistic in the upper-right hand corner of the screen only represents the ratio between Balancer/Varnish vs. Apache/Drupal requests. This does not take into account browser cache, Memcache, or Drupal's internal cache. Don't get worked up if the percentage is low.

Heat Map Demo

If you visit /map, you should see a demo of all the current requests to your site, rendered as a heatmap. In addition to the map, the top five locations (global cities) will also be listed in the bottom-right hand corner of your screen. Requests are mapped to locations with a local GeoIP database.

Filtering Logs

If you find that there are too many requests on screen to track, you can pass in a regular expression that all incoming logs must pass to be displayed. ex:

Show requests from a specific IP - localhost:8080/map?

Exclude requests to file directories - localhost:8080?^((?!/sites/./files).)$


  1. Install Node and the Node Package Manager (NPM).
  2. Run npm install from the wowstream directory.
  3. Copy "config_example.json" to "config.json" and edit the placeholders based on the "Configuration" documentation below.
  4. Run npm start to start the web application.
  5. Visit localhost:8080 in your web browser to start Logstreaming.


These are the configuration keys represented in your config.json file:

  • username
  • Your CloudAPI e-mail (see doc for info)
  • secret
  • Your CloudAPI private key (see doc for info)
  • http_username
  • A username to use in Wowstream to protect your logs.
  • http_password
  • A password to use in Wowstream to protect your logs.
  • site
  • Your site name, i.e. prod:sitegroup or devcloud:sitegroup.
  • environment
  • Your environment's machine name, i.e. dev, stage, or prod.
  • port
  • The port Wowstream should run on. By default "8080" is used.