107 lines
7.4 KiB
HTML
107 lines
7.4 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="dc.language" scheme="rfc1766" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<meta name="dc.date" scheme="iso8601" content="2005-09-06" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow"/>
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<title>Directory Server (LDAP) - Migrating a network of replicating servers</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="rzahyrepmig"></a>
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<h3 id="rzahyrepmig">Migrating a network of replicating servers</h3>
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<p>The first time that the master server is started, it migrates the information
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in the directory that controls replication. The entries with objectclass replicaObject
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under cn=localhost are replaced with entries used by the new replication model
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(for more information, see <a href="rzahyreplication-c.htm#rzahyreplication-c">Replication</a>). The master
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server is configured to replicate all the suffixes in the directory. The agreement
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entries are created with the attribute ibm-replicationOnHold set to true.
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This allows updates made to the master to be accumulated for the replica until
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the replica is ready.</p>
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<p>These entries are referred to as the replication topology. The new master
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can be used with replicas running prior versions; data related to the new
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functions will not be replicated to the back-level servers. It is necessary
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to export the replication topology entries from the master and add them to
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each replica after the replica server has been migrated. To export the entries,
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use the Qshell command line tool <a href="rzahyldapsrch.htm#rzahyldapsrch">ldapsearch</a> and save the
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output to a file. The search command is similar to the following:</p>
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<pre class="xmp">ldapsearch -h <span class="italic">master-server-host-name</span> -p <span class="italic">master-server-port</span> \
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-D <span class="italic">master-server-admin-DN</span> -w <span class="italic">master-server-admin-password</span> \
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-b ibm-replicagroup=default,<span class="italic">suffix-entry-DN</span> \
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-L "(|(objectclass=ibm-replicaSubEntry)(objectclass=ibm-replicationAgreement))" \
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> replication.topology.ldif</pre>
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<p>This command creates an output LDIF file named replication.topology.ldif
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in the current working directory. The file contains only the new entries. </p>
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<a name="wq83"></a>
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<div class="notetitle" id="wq83">Note:</div>
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<div class="notebody">Do not include the following suffixes:
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<ul>
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<li>cn=changelog</li>
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<li>cn=localhost</li>
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<li>cn=pwdpolicy</li>
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<li>cn=schema</li>
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<li>cn=configuration</li></ul>Include only user-created suffixes.</div>
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<p>Repeat the command for each suffix entry on the master, but replace ">"
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with ">>" to append the data to the output file for subsequent searches.
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After the file is complete, copy it to the replica servers.</p>
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<p>Add the file to the replica servers after they have been successfully migrated;
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do not add the file to servers running previous versions of the directory
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server. You must start and stop the server before you add the file.</p>
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<p>To start the server, use the <span class="bold">Start</span> option in iSeries
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Navigator. For more information, see<a href="rzahysta-pi.htm#rzahysta-pi">Start/stop the Directory Server</a>.</p>
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<p>To stop the server, use the <span class="bold">Stop</span> option in iSeries
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Navigator. For more information, see <a href="rzahysta-pi.htm#rzahysta-pi">Start/stop the Directory Server</a>.</p>
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<p>When you add the file to a replica server, be sure that the replica server
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is not started. To add the data, use the <span class="bold">Import File</span> option
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in iSeries Navigator.</p>
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<p>After the replication topology entries are loaded, start the replica server
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and resume replication. You can resume replication in one of the following
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ways: </p>
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<ul>
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<li>On the master server, use <span class="bold">Manage Queues in Replication
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Management</span> in the Web administration tool.</li>
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<li>Use the <span class="bold">ldapexop</span> command line utility. For example:
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<pre class="xmp">ldapexop -h <span class="italic">master-server-host-name</span> -p <span class="italic">master-server-port</span> \
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-D <span class="italic">master-server-admin-DN</span> -w <span class="italic">master-server-admin-password</span> \
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-op controlrepl -action resume -ra <span class="italic">replica-agreement-DN</span></pre>This command resumes replication for the server defined in the
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entry with the specified DN.</li></ul>
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<p>To determine which replica agreement DN corresponds to a replica server,
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look in the replication.topology.ldif file. The master server will log a
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message that replication has started for that replica and a warning that the
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replica server's ID in the agreement does not match the replica's server ID.
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To update the replica agreement to use the correct server ID, use <span class="bold">Replication Management</span> in the Web administration tool, or the command
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line tool <span class="bold">ldapmodify</span>. For example:</p>
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<pre class="xmp">ldapmodify -c -h <span class="italic">master-server-host-name</span> -p <span class="italic">master-server-port</span> \
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-D <span class="italic">master-server-admin-DN</span> -w <span class="italic">master-server-admin-password</span>
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dn: <span class="italic">replica-agreement-DN</span>
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changetype: modify
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replace: ibm-replicaConsumerID
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ibm-replicaConsumerID: <span class="italic">replica-server-ID</span>
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</pre><p class="indatacontent">You can enter these commands directly on the command line, or you can
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save the commands in an LDIF file and supply them to the command with the <span class="bold">-i <span class="italic">file</span></span> option.
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Use <span class="bold">End Previous Request</span> to stop the command.</p>
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<p>Migration for this replica is complete.</p>
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<p>To continue to use a replica running a previous version, it is still necessary
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to resume replication using the command line tool <span class="bold">ldapexop</span> or <span class="bold">Replication Management</span> in the Web
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administration tool for that replica. If a replica running a previous version
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is migrated later, use the command line tool <span class="bold">ldapdiff</span> to synchronize the directory data. This will ensure that entries or
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attributes that were not replicated are updated on the replica.</p>
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<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
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</body>
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</html>
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