Managing HP Serviceguard for Linux, Seventh Edition, July 2007

Cluster and Package Maintenance
Reconfiguring a Cluster
Chapter 7 251
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 the Cluster Configuration
Change to the Cluster
Configuration Required Cluster State
Add a new node All cluster nodes must be running.
Delete a node A node can be deleted even though it
is unavailable or unreachable.
Change Maximum Configured
Packages
Cluster can be running.
Change Lock LUN
Configuration
Cluster must not be running.
Change Quorum Server
Configuration
Cluster must not be running.
Add NICs and their IP
addresses to the cluster
configuration
Cluster can be running. See
“Changing the Cluster Networking
Configuration while the Cluster Is
Running” on page 256.
Delete NICs and their IP
addresses, from the cluster
configuration
Cluster can be running. “Changing
the Cluster Networking
Configuration while the Cluster Is
Running” on page 256.
Change the designation of an
existing interface from
HEARTBEAT_IP to
STATIONARY_IP, or vice versa
Cluster can be running. See
“Changing the Cluster Networking
Configuration while the Cluster Is
Running” on page 256.