Managing Clusters
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By default, cluster nodes are configured to reboot after an automatic shutdown. On certain
occasions, you might want to prevent a downed cluster node from rebooting so you can troubleshoot
problems.
1
Open the
opt/novell/ncs/bin/ldncs
file in a text editor.
2
Find the following line:
echo -n $TOLERANCE > /proc/sys/kernel/panic
3
Replace $TOLERANCE with a value of 0 to cause the server to not automatically reboot after
a shutdown.
4
After editing the
ldncs
file, you must reboot the server to cause the change to take effect.
8.12 Renaming a Pool for a Pool Cluster
Resource
When a cluster-enabled NSS pool is used as a Novell Cluster Services cluster resource, special steps
must be followed if you decide to rename the pool.
1
Cluster migrate the pool resource to the node in the cluster where the pool was initially created.
2
Offline the pool cluster resource.
3
Activate the pool by using iManager or NSSMU.
4
Rename the pool.
After the rename, the pool is in a deactive state.
5
Online the pool cluster resource.
Novell Cluster Services automatically updates the pool resource load and unload scripts to reflect
the name change. Also, NSS automatically changes the Pool Resource object name in eDirectory.
8.13 Moving a Cluster, or Changing IP
Addresses, LDAP Server, or Administrator
Credentials for a Cluster
Use the instructions in this section to change the IP addresses of the cluster, information about the
LDAP server that the cluster uses, or the credentials used to administer the cluster.
Section 8.13.1, “Changing the Administrator Credentials or LDAP Server IP Addresses for a
Cluster,” on page 105
Section 8.13.2, “Moving a Cluster or Changing IP Addresses of Cluster Nodes and Resources,”
on page 107
8.13.1 Changing the Administrator Credentials or LDAP Server
IP Addresses for a Cluster
You can modify the administrator credentials or LDAP server settings that you assigned when you
created the cluster. You must modify this cluster configuration information in the following cases:
Changing the Administrator username and password for the cluster
Changing the password for the existing Administrator username