Configuring Tivoli Directory Server proxy servers

You can configure a proxy server to help make Tivoli® Directory Server highly available with instant failover. A second standby proxy server can be implemented to take over from the primary in the event of a primary proxy server failure.

About this task

You can use cluster management software, such as IBM® Tivoli System Automation for Multiplatforms, to automate the failover of the proxy server to the backup proxy server. A shared proxy instance can be used between the proxy servers and mounted on the active server only. You can use a service IP to access the active proxy server, which provides seamless failover when the primary server fails. If Tivoli Directory Server fails, the proxy server automatically reroutes the requests to the second node. Proxy servers can also act as a load balancer, as the directory servers are configured in active-active mode.

Procedure

  1. Install System Automation for Multiplatforms on all nodes.
  2. Download and install the System Automation for Multiplatforms policy .
  3. Install Tivoli Directory Server on the directory server systems andconfigure peer-to-peer replication.
  4. Install and configure Tivoli Directory Server proxy servers.
  5. From the \usr\sbin\rsct\sapolicies\itds directory, open the ITSAMP-ITDS.pdf document.
  6. From the ITSAMP-ITDS.pdf document, choose one of the following scenarios and follow the instructions:
    Option Description
    Scenario 1 A configuration that consists of a proxy server, WebSphere® Application Server, and N peer servers. The proxy server runs on proxy-node1 in the cluster. The instance data of the proxy server is stored on a shared disk. When the proxy server on node 1 breaks down, system operations can be restored on a proxy server that is running on node 2.
    Scenario 2 A configuration that is like scenario 1, but the instance data of the proxy server is not stored on a shared disk. The proxy servers must be synchronized manually when required.
  7. To mask the proxy server failover from the application server, configure the application server security to point to the Service IP for the Tivoli Directory Server proxy server.


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