Managing HP Serviceguard A.11.20.10 for Linux, December 2012

3.5.11 VLAN Configurations................................................................................................67
3.5.11.1 What is VLAN?.................................................................................................67
3.5.11.2 Support for Linux VLAN......................................................................................67
3.5.11.3 Configuration Restrictions....................................................................................68
3.5.11.4 Additional Heartbeat Requirements......................................................................68
3.6 Volume Managers for Data Storage....................................................................................68
3.6.1 Storage on Arrays......................................................................................................68
3.6.2 Monitoring Disks.......................................................................................................69
3.6.3 More Information on LVM...........................................................................................69
3.7 About Persistent Reservations..............................................................................................69
3.7.1 Rules and Limitations..................................................................................................70
3.7.2 How Persistent Reservations Work................................................................................71
3.8 Responses to Failures ........................................................................................................72
3.8.1 Reboot When a Node Fails .......................................................................................72
3.8.1.1 What Happens when a Node Times Out...............................................................72
3.8.1.1.1 Example .....................................................................................................72
3.8.2 Responses to Hardware Failures .................................................................................73
3.8.3 Responses to Package and Service Failures ..................................................................73
3.8.4 Responses to Package and Generic Resources Failures...................................................74
3.8.4.1 Service Restarts .................................................................................................74
3.8.4.2 Network Communication Failure .........................................................................74
4 Planning and Documenting an HA Cluster ..................................................75
4.1 General Planning .............................................................................................................75
4.1.1 Serviceguard Memory Requirements.............................................................................75
4.1.2 Planning for Expansion ..............................................................................................75
4.2 Using Serviceguard with VMware Virtual Machines..............................................................76
4.2.1 Cluster configuration options.......................................................................................76
4.3 Hardware Planning ..........................................................................................................77
4.3.1 SPU Information ........................................................................................................77
4.3.2 LAN Information ......................................................................................................77
4.3.3 Shared Storage.........................................................................................................78
4.3.3.1 FibreChannel.....................................................................................................78
4.3.3.2 Multipath for Storage ........................................................................................78
4.3.4 Disk I/O Information ................................................................................................78
4.3.5 Hardware Configuration Worksheet ............................................................................79
4.4 Power Supply Planning .....................................................................................................79
4.4.1 Power Supply Configuration Worksheet .......................................................................80
4.5 Cluster Lock Planning........................................................................................................80
4.5.1 Cluster Lock Requirements...........................................................................................80
4.5.2 Planning for Expansion..............................................................................................80
4.5.3 Using a Quorum Server.............................................................................................80
4.5.3.1 Quorum Server Worksheet .................................................................................80
4.6 Volume Manager Planning ................................................................................................81
4.6.1 Volume Groups and Physical Volume Worksheet............................................................81
4.7 Cluster Configuration Planning ..........................................................................................81
4.7.1 Easy Deployment: cmpreparecl....................................................................................82
4.7.2 Heartbeat Subnet and Cluster Re-formation Time ..........................................................83
4.7.3 About Hostname Address Families: IPv4-Only, IPv6-Only, and Mixed Mode......................83
4.7.3.1 What Is IPv4–only Mode?...................................................................................84
4.7.3.2 What Is IPv6-Only Mode?...................................................................................84
4.7.3.2.1 Rules and Restrictions for IPv6-Only Mode......................................................84
4.7.3.2.2 Recommendations for IPv6-Only Mode..........................................................85
4.7.3.3 What Is Mixed Mode?........................................................................................85
Contents 5