A few weeks ago, I posted a blog entitled “Fun with Varnish and Walrus on Eucalyptus, Part 1“. This blog will follow-up on my blog to showcase a few production use cases that utilize the Varnish–Walrus architecture built on top of Eucalyptus.*NOTE* This architecture can also be leveraged using AWS EC2 and S3. This is one of the many benefits of Eucalyptus being AWS compatible.

The tools and web pages that take advantage of the Varnish-Walrus architecture on Eucalyptus are the following:

• Eustore¹
• Starter Eucalyptus Machine Images (EMIs) Page
• Eucalyptus Machine Images

Eustore uses the Varnish-Walrus architecture by pulling images through emi.eucalyptus.com (the varnish instance). The data for each of the images is stored in a JSON file located in a Walrus bukkit. For more information about Eustore, please refer to David Kavanagh’s Eustore blog.

The Starter Eucalyptus Machine Images (EMIs) page uses the Varnish-Walrus architecture to allow users to download all of the EMIs that can be downloaded.

Since emis.eucalyptus.com is a varnish instance, you can query logs there to get statistics on how many of each EMI has been downloaded.

The Eucalyptus Machine Images page is a static web page for emis.eucalyptus.com, which is comprised of HTML, CSS, and jQuery – which are all stored in a Walrus bukkit.

The web page for emis.eucalyptus.com definitely shows the power of using Walrus as a data store for various information. It accesses the same JSON file that is used by Eustore. We did this to make sure that there is consistency with all tools and web pages that provide access to the EMIs we create.

Hope you enjoyed this introduction to the use cases we use here at Eucalyptus. Stay tuned to the follow-up blogs that provide a more in-depth view as to how each use case utilizes our Varnish-Walrus infrastructure.

Thanks to David Kavanagh and Ian Struble for helping in this endeavor. This blog would have been out sooner, but I was busy at Scale 10x working the booth for Eucalyptus Systems. To see the fun we had at the conference, check out the following tumblr posts:

• Eucalyptus and “Pretty Cloud Swag” at Scale 10x Conference
• Eucalyptus Booth Work
• Eucalyptus and the Penguin!

Till next time…

¹Eustore was designed by David Kavanagh, one of the many great colleagues I work with at Eucalyptus Systems. It initially started as a project idea that spurred from various image management needs discussed in the Eucalyptus Image Management group.