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Chapter 2. Configuring single-supplier replication using the web console

In a single-supplier replication environment, one writable supplier replicates data to one or multiple read-only consumers. For example, set up single-supplier replication if a suffix receives a large number of search requests but only a small number of write requests. To distribute the load, clients can then search for the suffix on read-only consumers and send write requests to the supplier.

This section assumes that you have an existing Directory Server instance running on a host named supplier.example.com that will act as a supplier in the replication topology to be set up. The procedures describe how to add a read-only consumer named consumer.example.com to the topology, and how to configure single-supplier replication for the dc=example,dc=com suffix.

2.1. Preparing the new consumer using the web console

To prepare the consumer.example.com host, enable replication. This process:

  • Configures the role of this server in the replication topology
  • Defines the suffix that is replicated
  • Creates the replication manager account the supplier uses to connect to this host

Perform this procedure on the consumer that you want to add to the replication topology.

Prerequisites

  • You installed the Directory Server instance.
  • The database for the dc=example,dc=com suffix exists.
  • You are logged in to the instance in the web console.

Procedure

  1. Open the Replication menu.
  2. Select the dc=example,dc=com suffix.
  3. Click Enable Replication.
  4. Select Consumer in the Replication Role field, and enter the replication manager account and the password to create:

    enabling replication on consumer

    These settings configure the host as a consumer for the dc=example,dc=com suffix. Additionally, the server creates the cn=replication manager,cn=config user with the specified password and allows this account to replicate changes for the suffix to this host.

  5. Click Enable Replication.

Verification

  1. Open the Replication menu.
  2. Select the dc=example,dc=com suffix.
  3. If the Replica Role field contains the value Consumer, replication is enabled, and the host is configured as a consumer.

2.2. Configuring the existing server as a supplier to the consumer using the web console

To prepare the supplier.example.com host, you need to:

  • Enable replication for the suffix.
  • Create a replication agreement to the consumer.
  • Initialize the consumer.

Perform this procedure on the existing supplier in the replication topology.

Prerequisites

  • You enabled replication for the dc=example,dc=com suffix on the consumer.
  • You are logged in to the instance in the web console.

Procedure

  1. Open the Replication menu.
  2. Select the dc=example,dc=com suffix.
  3. Enable replication:

    1. Click Enable Replication.
    2. Select Supplier in the Replication Role field, enter a replica ID, replication manager credentials, and leave the Bind Group DN field empty:

      enabling replication on supplier for single supplier replication

      These settings configure the host as a supplier for the dc=example,dc=com suffix and set the replica ID of this entry to 1.

      Important

      The replica ID must be a unique integer between 1 and 65534 for a suffix across all suppliers in the topology.

    3. Click Enable Replication.
  4. Add a replication agreement and initialize the consumer:

    1. On the Agreements tab, click Create Agreement, and fill the fields:

      create replication agreement single supplier

      These settings create a replication agreement named example-agreement. The replication agreement defines settings, such as the consumer’s host name, protocol, and authentication information that the supplier uses when connecting and replicating data to this consumer.

    2. Select Do Online Initialization in the Consumer Initialization field to automatically initialize the consumer after saving the agreement.
    3. Click Save Agreement.

      After the agreement was created, Directory Server initializes consumer.example.com. Depending on the amount of data to replicate, initialization can be time-consuming.

Verification

  1. Open the Replication menu.
  2. Select the dc=example,dc=com suffix.
  3. On the Agreements tab, verify the status of the agreement in the State column of the table.

    replication agreement successfully initialized