Installation guide

10
Deploying eDirectory on High Availability Clusters 99
10
Deploying eDirectory on High
Availability Clusters
The primary method through which NetIQ eDirectory supports high availability is by configuring
multiple servers through synchronization. However, clustering may be a more viable alternative for
achieving high availability in some environments.
This section provides guidelines for configuring eDirectory on high availability clusters by using
shared storage. The information in this section is generalized for shared storage high availability
clusters on supported Windows and Linux platforms, and the information is not specific to a
particular cluster manager.
State data for eDirectory must be located on the shared storage so that it is available to the cluster
node that is currently running the services. This means that the eDirectory DIB must be located on
the cluster shared storage. The root eDirectory instance on each of the cluster nodes must be
configured to use the DIB on the shared storage.
In addition to the DIB, it is also necessary to share NICI (NetIQ International Cryptographic
Infrastructure) data so that server-specific keys are replicated among the cluster nodes. NICI data
used by all cluster nodes must be located on the cluster shared storage.
Other eDirectory configuration and log data should also reside on shared storage.
eDirectory 8.8 SP8 includes a utility for both Linux and Windows servers that automatically
configures eDirectory in your clustered environment, including copying data to a specified shared
storage location, updating the appropriate configuration parameters, and setting up eDirectory
services on cluster nodes other than the primary node.
The procedures in the following sections are based on the following assumptions:
 You are familiar with eDirectory installation procedures.
 You are using a two-node cluster.
NOTE: A two-node cluster is the minimum configuration used for high availability. However,
the concepts in this section can easily be extended to a cluster with additional nodes. Note that
eDirectory does not support load balancing by using multiple cluster nodes.
This section covers the following topics:
 Section 10.1, “Clustering eDirectory Services on Linux,” on page 100
 Section 10.2, “Clustering eDirectory Services on Windows,” on page 102
 Section 10.3, “Troubleshooting Clustered Environments,” on page 105
 Section 10.4, “Configuration Utility Options,” on page 105