Managing Serviceguard Eighteenth Edition, September 2010

NOTE: The full execution sequence for starting a package is:
1. The master control script itself
2. External pre-scripts
3. Volume groups
4. File systems
5. Package IPs
6. External scripts
7. Services
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 7-2 shows the required
cluster state for many kinds of changes.
Table 7-2 Types of Changes to the Cluster Configuration
Required Cluster StateChange to the Cluster Configuration
All systems configured as members of this cluster must
be running.
Add a new node
A node can be deleted even though it is unavailable or
unreachable.
Delete a node
Cluster can be running.Add a volume group
Cluster can be running. Packages that use the volume
group will not be able to start again until their
configuration is modified.
Delete a volume group
Cluster can be running.Change Maximum Configured Packages
Cluster can be running; see the NOTE below this table
and “What Happens when You Change the Quorum
Configuration Online” (page 66).
Change Quorum Server Configuration
Cluster can be running; see “Updating the Cluster Lock
Configuration” (page 364), “What Happens when You
Change the Quorum Configuration Online” (page 66),
and the NOTE below this table.
Change Cluster Lock Configuration (LVM lock
disk)
Cluster can be running. See “Updating the Cluster Lock
LUN Configuration Online” (page 364), “What Happens
when You Change the Quorum Configuration Online”
(page 66), and the NOTE below this table.
Change Cluster Lock Configuration (lock LUN)
Cluster can be running. See “Changing the Cluster
Networking Configuration while the Cluster Is
Running” (page 367).
Add NICs and their IP addresses, if any, to the
cluster configuration
Reconfiguring a Cluster 359