OpenLDAP Server

See also: https://marc.wäckerlin.ch/computer/setup-openldap-server-in-docker

Configuration

OpenLDAP server in Ubuntu default configuration. Initial setup is configured though environment variables.

Environment Variables:

• DOMAIN (mandatory) Your domain name, e.g. example.org. The distinguish name is created from this domain, e.g. as cn=example,cn=org.
• PASSWORD (optional) Administrator password, account is derieved from DOMAIN, e.g. cn=admin,dc=example,dc=org. If not given, a password is generated and written to docker logs.
• DEBUG (optional) Specifies the debug level, defaults to 0 (no debug output)
• INDEXES (optional) A list of indexes that the LDAP server should maintain, separated by spaces, e.g.: index uid eq index cn eq.

Ports:

• 389 (LDAP and LDAP+startTLS)
• 636 (LDAP+SSL)

Volumes:

• /var/lib/ldap the database
• /ssl mount from let's encrypt configuration /etc/letsencrypt to enable tls and ssl
• /etc/ldap config file
• /var/backups backups
• /var/restore copy one backup file here to start restore on next restart

Example

Start your openLDAP server:

docker run -it --rm --name openldap \
           -p 389:389 \
           -e DEBUG_LEVEL=1 \
           -e DOMAIN=my-company.com \
           -e ORGANIZATION="My Company" \
           -e PASSWORD=1234567890 \
           mwaeckerlin/openldap

Now you can access your LDAP, e.g. through apache directory studio.

To access cn=config, set cn=config as root and use the administrator account for binding, here cn=admin,dc=my-company,dc=com and password 1234567890.

Restore a Backup

You can create backups easily in data.ldif:

slapcat -l data.ldif

To restore the backup file, copy a file named to match *data.ldif in the volume /var/restore, then restart the container.

After successful restore, the file will be moved to volume /var/backups/<date>-restored-data.ldif.

Before every restart, a backup is generated in /var/backups/<date>-startup-data.ldif.

Note to Upgrades after 2018-04-13

The base image has been replaced from ubutnu to alpine. This way, the image size has been reduced from ~500MB to ~15MB. But at the same time, some changes were made, i.e.:

• configuration is now in a slapd.conf file
• database is no more hdb, but mdb

This means: Your database from previous versions cannot be used anymore. You need to create a backup and restore it after migration.