ldapdock/INSTALL.md
2025-10-11 14:54:02 -04:00

2.8 KiB

ldapdock

a configurable container running openLDAP

Step by step approach on how to setup and run an openLDAP server on a systemd-less docker image container

1- Creating the ldapdock image container

build ldapdock from the dockerfile and run into it

> docker build -t ldapdock /path/to/dockerfile
> docker run -h example.com -i -t -v ldap_data:/var/lib/ldap -v ldap_config:/etc/ldap/slapd.d ldapdock /bin/bash

2- Run the openLDAP server and create an admin user

Use the following command to start openLDAP

root@example:/# slapd -h "ldap:/// ldapi:///" -g openldap -u openldap -F /etc/ldap/slapd.d

Generate a password hash for our administrator user, 1234 here being the password

root@example:/# slappasswd -s 1234
{SSHA}yxIgYTzcuRRdlesjfWkIN6K97/8jOrZF

Create the .ldif file that will create the admin user, edit the userPassword attribute with our password hash
(you can copy & paste the entire command until userPassword, copy your password hash with the mouse, and paste it directly)

root@example:/# cat > create_admin.ldif << EOL
dn: cn=admin,dc=example,dc=com
changetype: add
objectClass: organizationalRole
objectClass: simpleSecurityObject
cn: admin
description: LDAP administrator
userPassword: {SSHA}yxIgYTzcuRRdlesjfWkIN6K97/8jOrZF  # Replace with the hash of your password
EOL
root@example:/# ldapadd -x -H ldap:/// -D "cn=admin,dc=example,dc=com" -w admin -f create_admin.ldif
adding new entry "cn=admin,dc=example,dc=com"

That's all, our administrator user was properly done.

3- Load and enable policy modules

We need to make use of new schemas and policies, which in large part exists in /usr/lib/ppolicy.so -since the module exists, we are going to create modify_ppolicy_module.ldif to be able to make use of it:

root@example:/# cat > modify_ppolicy_module.ldif << EOL
dn: cn=module{0},cn=config
changetype: modify
add: olcModuleLoad
olcModuleLoad: ppolicy.so
EOL
root@example:/# ldapmodify -Q -Y EXTERNAL -H ldapi:/// -f modify_ppolicy_module.ldif
modifying entry "cn=module{0},cn=config"

Reset slapd (openLDAP server)

root@example:/# kill $(pidof slapd)
root@example:/# slapd -h "ldap:/// ldapi:///" -g openldap -u openldap -F /etc/ldap/slapd.d

Now that we restarted our openLDAP server, we can load the new module, so we create the following .ldif file:

root@example:/# cat > enable_ppolicy.ldif << EOL
dn: olcOverlay=ppolicy,olcDatabase={1}mdb,cn=config
changetype: add
objectClass: olcOverlayConfig
objectClass: olcPPolicyConfig
olcOverlay: ppolicy
olcPPolicyDefault: cn=default,ou=policies,dc=example,dc=com
EOL
root@example:/# ldapadd -Q -Y EXTERNAL -H ldapi:/// -f enable_ppolicy.ldif
adding new entry "olcOverlay=ppolicy,olcDatabase={1}mdb,cn=config"

The policies module has been loaded and we can begin to configure password schemas and ACLs.