8.14. Replicating o=NetscapeRoot for Administration Server Failover

Replication usually occurs between Directory Server user databases to distribute directory data, but it is also possible to use replication to provide failover support for the Administration Server database, o=NetscapeRoot.

Install and configure the first Directory Server instance.
The setup-ds-admin.pl script has an option, -f, which references an inf. The inf can be used to import LDIF files through the ConfigFile parameter, and the LDIF files can create databases, suffixes, and replication entries. (The inf file is described in more detail in the Directory Server Installation Guide.)
```
/usr/sbin/setup-ds-admin.pl -f /tmp/server1.inf
```
To configure the o=NetscapeRoot database on server1 as a multi-master supplier replica, use the following statements in the inf file:
```
 [slapd]
...
 ConfigFile = repluser.ldif Example 8.1, “Example Supplier Bind DN Entry”    
 ConfigFile = changelog.ldif Example 8.2, “Example Changelog Entry”    
 ConfigFile = replica.ldif Example 8.3, “Example Supplier Replica Entry”     
 ConfigFile = replagreement.ldif Example 8.4, “Example Replication Agreement Entry”    
...
```

Install and configure the second Directory Server instance. For the second server, server2.example.com, use the setup-ds.pl command, which installs a Directory Server instance without installing a local Administration Server.

/usr/sbin/setup-ds.pl -f /tmp/server2.inf

With server2, use the inf file to create and configure a o=NetscapeRoot database on server2 as a multi-master supplier replica:

 [slapd]
...
 ConfigFile = netscaperootdb.ldif Example 3.1, “Example Root Suffix Entry”    
 ConfigFile = repluser.ldif Example 8.1, “Example Supplier Bind DN Entry”    
 ConfigFile = changelog.ldif Example 8.2, “Example Changelog Entry”     
 ConfigFile = replica.ldif Example 8.3, “Example Supplier Replica Entry”    
 ConfigFile = replagreement.ldif Example 8.4, “Example Replication Agreement Entry”    
...

Initialize the o=NetscapeRoot database on server2 from server1. Add the nsds5replicarefresh attribute to the replication agreement on server1.

ldapmodify -h supplier1.example.com -p 389 -D "cn=directory manager" -w password

dn: cn=ExampleAgreement1,cn=replica,cn="o=NetscapeRoot",cn=mapping tree,cn=config
changetype: modify
replace: nsds5beginreplicarefresh
nsds5beginreplicarefresh: start

Run the register-ds-admin.pl to create a local Administration Server on server2 and switch the configuration directory for server2 to its own o=NetscapeRoot database from server1.
```
/usr/sbin/register-ds-admin.pl
```
Disable the PTA Plug-in on server2 so that it does not pass bind operations for the administrative users in its o=NetscapeRoot to server1.
See Section 16.2, “Enabling and Disabling Plug-ins”.