Appendix D Integrating HA Applications with Serviceguard

Table of Contents

Checklist for Integrating HA Applications

The following is a summary of the steps you should follow to integrate an application into the Serviceguard environment:

Read the rest of this book, including the chapters on cluster and package configuration, and the appendix “Designing Highly Available Cluster Applications.”
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?
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?
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?

Technical documentation