Managing Serviceguard 13th Edition, February 2007
Cluster and Package Maintenance
Reconfiguring a Cluster
Chapter 7 323
Reconfiguring a Cluster
You can reconfigure a cluster either when it is halted or while it is still
running. Some operations can only be done when the cluster is halted.
Table 7-1 shows the required cluster state for many kinds of changes.
Table 7-1 Types of Changes to Permanent Cluster Configuration
Change to the Cluster
Configuration Required Cluster State
Add a new node All systems configured as members
of this cluster must be running.
Delete a node A node can be deleted even though it
is unavailable or unreachable.
Add a volume group Cluster may be running or halted.
Delete a volume group Cluster may be running or halted.
Packages that use the volume group
will not be able to start again until
their control scripts are modified.
Change Maximum Configured
Packages
Cluster may be running or halted.
Change Timing Parameters Cluster must not be running.
Change Quorum Server
Configuration
Cluster must not be running.
Change Cluster Lock
Configuration
Cluster can be running under
certain conditions; see “Updating
the Cluster Lock Configuration” on
page 324.
Change IP addresses for
heartbeats or monitored
subnets
Cluster must not be running.
Remove a LAN card or VLAN
interface
Cluster must not be running. See
“Removing a LAN or VLAN
Interface” on page 325.