Clustering Linux Servers with the Concurrent Deployment of HP Serviceguard Linux and Red Hat Global File System for RHEL5, October 2008

2
Executive Summary ............................................................................................................................3
Introduction.......................................................................................................................................3
Audience ......................................................................................................................................4
Cluster membership ...........................................................................................................................4
HP Serviceguard for Linux membership .............................................................................................4
Red Hat Cluster membership............................................................................................................4
Quorum rule ..............................................................................................................................4
2-node cluster ............................................................................................................................5
Equal sized partitions..................................................................................................................5
Majority Node failures................................................................................................................5
Quorum disk to bolster quorum ....................................................................................................5
Asymmetric cluster configuration – heavily weighted voting .............................................................6
Red Hat Global file system..................................................................................................................6
GFS suspended..............................................................................................................................6
SAN failure ...................................................................................................................................7
HP Serviceguard for Linux and Red Hat GFS Co-existence ......................................................................7
Heartbeat timeout settings ...............................................................................................................8
GFS File System Freeze...................................................................................................................8
Majority node failures ....................................................................................................................8
Network partition in a 2-node cluster................................................................................................9
Unequal sized partitions .................................................................................................................9
Equal sized partitions .....................................................................................................................9
Cluster Configuration System .........................................................................................................10
SAN failure .................................................................................................................................10
Cluster management in a Dual Cluster................................................................................................10
Automatic cluster startup at node startup .........................................................................................10
Cluster startup sequence ...............................................................................................................11
Operations that impact membership ...............................................................................................11
Upgrading from RHEL4 to RHEL5 ...................................................................................................11
Package configuration......................................................................................................................12
Modular Package configuration.....................................................................................................12
Legacy package configuration.......................................................................................................13
Recommended configurations............................................................................................................13
Support information .........................................................................................................................14
Conclusions ....................................................................................................................................15
Terms .............................................................................................................................................15
For More Information .......................................................................................................................17