Managing HP Serviceguard for Linux Ninth Edition, April 2009

Table 7-1 Types of Changes to the Cluster Configuration
Required Cluster StateChange to the Cluster Configuration
All cluster nodes 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.Change Maximum Configured Packages
Cluster can be running; see“What Happens when You
Change the Quorum Configuration Online” (page 48).
Change Quorum Server Configuration
Cluster can be running. See “Updating the Cluster Lock
LUN Configuration Online” (page 251) and“What
Happens when You Change the Quorum Configuration
Online” (page 48).
Change Cluster Lock Configuration (lock LUN)
Cluster can be running. See “Changing the Cluster
Networking Configuration while the Cluster Is
Running” (page 247).
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” (page 247).
Delete NICs and their IP addresses, from the
cluster configuration
Cluster can be running. See “Changing the Cluster
Networking Configuration while the Cluster Is
Running” (page 247).
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” (page 247)
Change an interface from IPv4 to IPv6, or vice
versa
Must delete the interface from the cluster configuration,
reconfigure it, then add it back into the cluster
configuration. See “What You Must Keep in Mind”
(page 248). Cluster can be running throughout.
Reconfigure IP addresses for a NIC used by the
cluster
Cluster can be running.Change NETWORK_POLLING_INTERVAL
Cluster can be running. See the entries for these
parameters under “Cluster Configuration Parameters
” (page 100)for more information.
Change IP Monitor parameters: SUBNET,
IP_MONITOR, POLLING TARGET
Cluster can be running.Change MEMBER_TIMEOUT and
AUTO_START_TIMEOUT
Cluster and package can be running.Change Access Control Policy
Previewing the Effect of Cluster Changes
Many variables affect package placement, including the availability of cluster nodes;
the availability of networks and other resources on those nodes; failover and failback
policies; and package weights, dependencies, and priorities, if you have configured
Reconfiguring a Cluster 241