Docker OpenLDAP Container

Step 1: Create an Environment File

The first step is to create an environment file that will store our admin password.

.env

DB_PASSWORD=Password1234

This file will be used to set the LDAP_ADMIN_PASSWORD environment variable in our Docker container.

Step 2: Create a Docker Compose File

Next, we'll create a Docker compose file that defines our OpenLDAP container.

openldap-docker-compose.yml

version: '3.9'

services:
  openldap:
    # Apple M1 Chip
    # platform: linux/amd64
    image: bitnami/openldap:2.6
    container_name: openldap
    restart: always
    env_file:
      - .env
    environment:
      LDAP_ROOT: dc=appdev24,dc=com
      LDAP_ADMIN_USERNAME: admin
      LDAP_ADMIN_PASSWORD: $DB_PASSWORD
    ports:
      - 389:1389
      - 636:1636
    volumes:     
      - openldap_datadir:/bitnami/openldap/
    networks:
      - openldap-network

networks:
  openldap-network:
    driver: bridge

volumes:
  openldap_datadir:

This file defines a single service, openldap, which uses the bitnami/openldap 2.6 image and maps port 389 on your local machine to port 1389 in the container.

Step 3: Start the Container

Now that we have our environment file and Docker compose file set up, it's time to start the container! Run the following command:

docker-compose -f openldap-docker-compose.yml up -d

This will start the container in detached mode, meaning it will run in the background.

Step4: Test OpenLDAP Container

Now we will try to connect to OpenLDAP Server. 

Note: you should have OpenLDAP command line tools ldapwhoami, ldapadd, ldapsearch, ldapdelete installed locally.

The ldapwhoami command is used to authenticate users.

db_password=Password1234

ldapwhoami -vvv -H ldap://localhost -D "cn=admin,dc=appdev24,dc=com" -x -w ${db_password}

Now we will create a user. For that let's create a LDAP data interchange format file.

developer.ldif

dn: cn=developer,dc=appdev24,dc=com
changetype: add
objectclass: inetOrgPerson
cn: developer
givenname: developer
sn: Developer
displayname: Developer User
mail: developer@appdev24.com
userpassword: Password1234

OpenLDAP provides ldapadd command to add records to the OpenLDAP directory.

ldapadd -x -H ldap://localhost -D "cn=admin,dc=appdev24,dc=com" -w ${db_password} -f developer.ldif

Now we will search the user. ldapsearch command is used to search the records in the OpenLDAP directory service.

ldapsearch -x -H ldap://localhost -D "cn=admin,dc=appdev24,dc=com" -w ${db_password} -b "cn=developer,dc=appdev24,dc=com"

Now we will delete the user. The ldapdelete command is used to delete an existing LDAP records. 

ldapdelete -x -H ldap://localhost -D "cn=admin,dc=appdev24,dc=com" -w ${db_password} "cn=developer,dc=appdev24,dc=com"

ldapsearch -x -H ldap://localhost -D "cn=admin,dc=appdev24,dc=com" -w ${db_password} -b "cn=developer,dc=appdev24,dc=com"

Step 5: Stop the Container

Finally, we can stop the container by running the following command:

docker-compose -f openldap-docker-compose.yml down

This will stop the container and remove it from memory.

That's it! We've successfully created and configured a Docker OpenLDAP container.