Managing HP Serviceguard A.11.20.00 for Linux, June 2012

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Contents

Printing History ..........................................................................................14

Preface......................................................................................................15

1 Serviceguard for Linux at a Glance.............................................................17

What is Serviceguard for Linux? ..............................................................................................17

Failover............................................................................................................................18

Using Serviceguard Manager..................................................................................................19

Monitoring Clusters with Serviceguard Manager....................................................................19

Administering Clusters with Serviceguard Manager................................................................19

Configuring Clusters with Serviceguard Manager...................................................................19

Starting Serviceguard Manager...........................................................................................19

Configuration Roadmap..........................................................................................................20

2 Understanding Hardware Configurations for Serviceguard for Linux................21

Redundant Cluster Components................................................................................................21

Redundant Network Components .............................................................................................21

Rules and Restrictions.........................................................................................................22

Redundant Ethernet Configuration .......................................................................................22

Cross-Subnet Configurations................................................................................................23

Configuration Tasks.......................................................................................................23

Restrictions...................................................................................................................24

For More Information.....................................................................................................24

Redundant Disk Storage..........................................................................................................25

Supported Disk Interfaces ...................................................................................................25

Disk Monitoring.................................................................................................................25

Sample Disk Configurations ...............................................................................................25

Redundant Power Supplies ......................................................................................................26

3 Understanding Serviceguard Software Components......................................27

Serviceguard Architecture........................................................................................................27

Serviceguard Daemons.......................................................................................................27

Configuration Daemon: cmclconfd...................................................................................28

Cluster Daemon: cmcld..................................................................................................28

Log Daemon: cmlogd....................................................................................................29

Network Manager Daemon: cmnetd................................................................................29

Lock LUN Daemon: cmdisklockd......................................................................................29

Service Assistant Daemon: cmserviced.............................................................................29

Generic Resource Assistant Daemon: cmresourced.............................................................29

Quorum Server Daemon: qs...........................................................................................29

Utility Daemon: cmlockd................................................................................................30

Cluster SNMP Agent Daemon: cmsnmpd..........................................................................30

Cluster WBEM Agent Daemon: cmwbemd........................................................................30

Proxy Daemon: cmproxyd..............................................................................................30

How the Cluster Manager Works .............................................................................................30

Configuration of the Cluster ................................................................................................30

Heartbeat Messages .........................................................................................................31

Manual Startup of Entire Cluster...........................................................................................31

Automatic Cluster Startup ...................................................................................................31

Dynamic Cluster Re-formation .............................................................................................32

Cluster Quorum to Prevent Split-Brain Syndrome.....................................................................32

Cluster Lock.......................................................................................................................32

Use of a Lock LUN as the Cluster Lock...................................................................................33

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