OpenID @ Work - Infrastructure Description

In my previous post I described our OpenID@Work overall architecture and flow. In this post I describe the deployment we adopted for this. A picture being worth a thousand words, here's an illustration of our deployment:

All traffic arrives through a load balancer that also serves as firewall and SSL terminator. The servers behind the firewall are run on a VIP. Server 1 runs Web Server 7 (more info here) on which we run the 2 instances of OpenSSO, the OpenID extension and the OpenID pages server (see previous post for details). Server 2 is a mirror of Server 1, mostly for load balancing and failover if needed. The users accounts are stored mirrored LDAP servers (servers 3 & 4). We use Sun Directory Server and plan to move to OpenDS soon.

For those of you interested, our servers specs are:

x2200 M2 with the following specs:
- 2 dualcore AMD Opteron Model 2218
- 8GB RAM (4x2GB DIMM)
- 2x250GB SATA HDD


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