Managing Clusters
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8.13.2 Moving a Cluster or Changing IP Addresses of Cluster
Nodes and Resources
If you move a cluster to a different subnet, you must change the IP addresses of the cluster nodes and
the cluster resources, information about the LDAP servers used by the cluster, and possibly the
administrator credentials for the cluster.
When you move the cluster to a new IP subnet, you must replace the existing unique static IP
addresses with ones that are valid in that subnet. You can make the IP address changes in the old
location or the new location. If you start the servers in the different IP subnet with the old IP
addresses, the cluster does not come up until you make the changes described in this section.
To modify the IP addresses of servers being used in a Novell Cluster Services cluster, perform the
following tasks in the order given:
“Prerequisites” on page 107
“Changing the IP Addresses of Cluster Resources” on page 107
“Changing the IP Addresses of Servers in a Cluster” on page 108
“Modifying the Cluster Configuration Information” on page 108
Prerequisites
Before you begin, make sure that the IP addresses and administrator username that you plan to use
meet the requirements specified in
Section 3.1.3, “Configuration Requirements,” on page 34
.
Changing the IP Addresses of Cluster Resources
Before you modify the server IP address for a server in a cluster, you must change the IP addresses
of all of the cluster resources that run on it:
1
Offline the cluster resources whose IP addresses are changing.
1a
In iManager, click
Cluster
s, then click
Cluster Manager
.
1b
Browse to locate and select the Cluster object of the cluster you want to manage.
1c
Select the check boxes next to the resources you want to take offline, then click
Offline
.
2
For each cluster resource, including the master IP address resource, modify information as
needed in the resource load, unload, and monitor scripts.
2a
In iManager, click
Clusters,
then click
Cluster Options
.
2b
Browse to locate and select the Cluster object of the cluster you want to manage.
2c
Select the check box next to the resource whose load script you want to edit, then click the
Details
link.
2d
Click the
Scripts
tab, then click the
Load Script
link.
2e
Edit the script by replacing variables with actual values for your new configuration, such
as the resource IP address and container name where you will be moving the cluster. You
might also need to edit the values used in the command lines.
IMPORTANT:
Do not comment out commands that are automatically generated for
parameters that define the cluster resource, such as the mount point, IP address, container
name, file system type, and device.
