Empty subschema (sub)entry

[yyrliu]

The issue

I'm trying to use ldap-ui as the frontend for glauth, which requires Subschema Discovery to generate the schema attributes. However, the query returned an empty schema. The documentation said that the entries in schema/ directory are returned, however, schema/ does not exist in glauth/glauth-plugins image. Probing with ldapsearch gave the following result:

~$ ldapsearch -LLL -o ldif-wrap=no -H ldap://localhost:389 -D cn=serviceuser,dc=glauth,dc=com -w mysecret -x -b "cn=schema"
dn: cn=schema
cn: schema
hasSubordinates: false
modifiersName: cn=Directory Manager
modifyTimeStamp: Mar 8, 2021, 12:46:29 PM PST (20210308204629Z)
objectclass: *

My setup

Docker with glauth/glauth-plugins image and default config/file.

docker-compose.yml

version: "3"
services:
  glauth:
    image: glauth/glauth-plugins
    container_name: glauth
    volumes:
      - ~/glauth/config/config.cfg:/app/config/config.cfg
    ports:
      - 389:389
    restart: unless-stopped

  ldap-ui:
    image: dnknth/ldap-ui
    container_name: ldap-ui
    environment:
      LDAP_URL: "ldap://glauth/"
      BASE_DN: "dc=glauth,dc=com"
      BIND_PATTERN: "cn=%s,ou=svcaccts,dc=glauth,dc=com"
      LOGIN_ATTR: "cn"
      restart: unless-stopped

settings.py of ldap-ui is slightly modified

USE_TLS = bool(os.environ.get('USE_TLS', LDAP_URL.startswith('ldaps://')))
INSECURE_TLS = bool(os.environ.get('INSECURE_TLS', False))

-SCHEMA_DN = 'cn=subschema'
+SCHEMA_DN = 'cn=schema'