Notification of configuration updates in a cluster system

A program product comprising:

• a computer-readable storage device;
• and
• program code stored within the computer-readable storage device that, when executed by a processing node, causes the processing node to perform:
• receiving a message from another node in a cluster environment, the message including a unique identifier of a shared data storage device including a cluster configuration database that defines membership of nodes in a cluster;
• in response to receiving the message:
• attempting to find the shared data storage device;
• in response to finding the shared data storage device, locating and reading the cluster configuration database on the shared data storage device;
• and
• assimilating a cluster configuration update indicated by the cluster configuration database.

A processing node comprising:

• a processor;
• data storage coupled to the processor;
• and
• program code within the data storage that, when executed by the processor, causes the processing node to perform:
• receiving a message from another node in a cluster environment, the message including a unique identifier of a shared data storage device including a cluster configuration database that defines membership of nodes in a cluster;
• in response to receiving the message:
• attempting to find the shared data storage device;
• in response to finding the shared data storage device, locating and reading the cluster configuration database on the shared data storage device;
• and
• assimilating a cluster configuration update indicated by the cluster configuration database.