Upgrade from BDB/HDB to MDB

The upgrade requires the following steps:

1. Backup your configuration files.
2. Make the changes to a copy of your configuration files per the sections below for slapd.conf and cn=config
3. Stop slapd
4. Dump the database (slapcat)
5. Remove the data files from the Openldap date directory 6, If using cn=config, load the updated configuration data
6. Load the database from the dumped image
7. Restart slapd

Slapd.conf

1. Make the following changes to the /opt/symas/etc/openldap/slapd.conf file

        vi /opt/symas/etc/openldap/slapd.conf 

Change references to hdb in the module load and database sections to mdb

    moduleload back_mdb.la
    # moduleload back_bdb.la
    # moduleload back_hdb.la
    
    database mdb
    # database bdb
    # database hdb

In the Database section comment out (#) the following:

    # Cachesize
    # Idlcachesize
    # Checkpoint

Beneath the commented out Checkpoint entry add the following line:

    Maxsize 10485760
    (Equals 10 MB in bytes - adjust as needed) 

2. Save the slapd.conf file
3. Restart Solserver/Slapd

        sudo /opt/symas/etc/solserver restart

    Or

        sudo service solserver restart 

    Or

        sudo systemctl restart solserver.service 

Slapd.d

1. Stop Solserver/Slapd

        sudo /opt/symas/etc/solserver stop 

    Or

        sudo service solserver stop

    Or

        sudo systemctl stop solserver.service 

2. Export the config database to a text file:

        slapcat -F /opt/symas/etc/openldap/slapd.d -l config.ldif -b
        cn=config

3. Move the existing config database out of the way:

        mv /opt/symas/etc/openldap/slapd.d{,.old}

4. Create a new, empty config database:

        mkdir /opt/symas/etc/openldap/slapd.d 
        chown --reference=/opt/symas/etc/openldap/slapd.d.old
        /opt/symas/etc/openldap/slapd.d 
        chmod --reference=/opt/symas/etc/openldap/slapd.d.old
        /opt/symas/etc/openldap/slapd.d 

5. Edit the exported config.ldif

        vim /opt/symas/etc/openldap/config.ldif

• Remove the olcSecurity setting (or add olcRootDN and olcRootPW to cn=config section)
• Modify olcModuleLoad back_bdb.la or back_hdb.la to back_mdb.la
• Modify olcDatabase={1}BDB or HDB to olcDatabase={1}MDB
• Remove olcDbCachesize, olcDbIDLcacheSize and olcDbCheckpoint attributes
• Add olcDbMaxSize 10485760

6. Save the modified config.ldif
7. Load the edited LDIF into the new empty database:

        slapadd -F /opt/symas/etc/openldap/slapd.d -l config.ldif 

8. Start Solserver/Slapd

        sudo /opt/symas/etc/solserver start 

    Or

        sudo service solserver start

    Or

        sudo systemctl start solserver.service