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OSCON.

Session

Wackamole: Open Source High Availability
Theo Schlossnagle, Chief Technology Officer, OmniTI Computer Consulting, Inc.

Track: Apache
Date: Thursday, July 29
Time: 1:45pm - 2:30pm
Location: Salon H

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Most open source tools that provide core services such as DNS, Email, and Web work extremely well, but do not address the vital aspect of high availability. This often results in site architects resorting closed source and/or proprietary solutions to address the availability needs in their architectures.

This session presents Wackamole: a general IP high-availability solution that can be deployed in conjunction with today's most popular open source tools. Wackamole utilizes the Spread group communication system to provide N-way IP failover capabilities as a systems service.

N-way IP failover allows N machines to manage M IP addresses where N can be less than, equal to, or greater than M. This unique property allows Wackamole to drive high-availability in architectures that were previously out of the realm of software HA solutions.

Concrete examples will be given to build (1) a redundant router/firewall, (2) a simple redundant DNS service and (3) a highly-available static image serving cluster.

Technologies discussed will include FreeBSD, Linux, Spread, Wackamole, Apache, and BIND.



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