Managing Serviceguard 14th Edition, June 2007

Integrating HA Applications with Serviceguard
Appendix D 457
D Integrating HA Applications
with Serviceguard
The following is a summary of the steps you should follow to integrate an
application into the Serviceguard environment:
1. Read the rest of this book, including the chapters on cluster and
package configuration, and the Appendix “Designing Highly
Available Cluster Applications.”
2. Define the cluster's behavior for normal operations:
• What should the cluster look like during normal operation?
• What is the standard configuration most people will use? (Is
there any data available about user requirements?)
• Can you separate out functions such as database or application
server onto separate machines, or does everything run on one
machine?
3. Define the cluster's behavior for failover operations:
• Does everything fail over together to the adoptive node?
• Can separate applications fail over to the same node?
• Is there already a high availability mechanism within the
application other than the features provided by Serviceguard?
4. Identify problem areas
• What does the application do today to handle a system reboot or
panic?
• Does the application use any system-specific information such as
uname() or gethostname(), SPU_ID, or MAC address which
would prevent it from failing over to another system?
5. Only applications specified by HP (or vendor approved) should be
deployed in environments using an HP Serviceguard Storage
Management Suite bundle with Veritas Cluster File System (CFS). If
you are creating your own application for use in a CFS environment,
some things to consider include: