1. Configuration Life-Cycle Management on the TeraGrid Ti Leggett

2. Challenges of Managing Computational Resources Software, hardware, and user needs change rapidly Maintaining uniform resources Handling one-offs Staying current with patches and security updates Documenting how and what machines run

3. Managing Configurations Unattended OS deployment –Jumpstart, Kickstart, Yast Cluster distributions –OSCAR, ROCKS Configuration management systems –Cfengine, LCFG, Bcfg2

4. UC/ANL Cluster Configuration Management A microcosm of machine classes Cluster goals are to maximize availability, predictability and reliability Originally used SystemImager to duplicate similar classes Switched to Bcfg2 early 2005

5. Cluster Uniformity Necessary for the user Necessary for the administrator UC/ANL has two compute classes and many management classes running two different OS versions

6. Security Performing security patches Auditing cluster status Updating machines after extended downtime or maintenance Aiding intrusion detection

7. Reusability Machine failures –Disk failures –Non-disk failures Machine replication New machines

8. Specification as Documentation Dealing with administrator absences Using version control Teaching new administrators Dealing with already running and working machines

9. Future Work Reduce dependency on tape backups Integrate with tools such as Nagios, Nessus, and iptables Integration with LDAP

10. Questions?