I am installing an LDAP server and configuring Jenkins in order to accept LDAP for authentication. In Jenkins parameters, I have a weird behavior with the parameter Root DN.

Documentation says :

Root DN

For authenticating user and determing the roles given to this user, Jenkins performs multiple LDAP queries.


But in practice, LDAP servers maintain an extensive index over the data, so specifying this field is rarely necessary — you should just let Jenkins figure this out by talking to LDAP.

If you do specify this value, the field normally looks something like dc=acme,dc=org

Weird behavior : If I do not specify the parameter, my user is not found. The others parameters have the default value.

LDAP is new to me so I am probably doing something wrong. I created a LDAP tree using slapd. I created one user adenoyelle under a node People that I also created. see ldapsearch result below :

root@myserver:~# ldapsearch -xLLL -b 'dc=acme,dc=com'
dn: dc=acme,dc=com
objectClass: top
objectClass: dcObject
objectClass: organization
o: acme.com
dc: acme

dn: cn=admin,dc=acme,dc=com
objectClass: simpleSecurityObject
objectClass: organizationalRole
cn: admin
description: LDAP administrator

dn: ou=people,dc=acme,dc=com
cn: people
objectClass: organizationalRole
objectClass: top
ou: people

dn: uid=adenoyelle,ou=people,dc=acme,dc=com
objectClass: account
objectClass: top
objectClass: simpleSecurityObject
uid: adenoyelle

If I let Root DN blank, my user cannot authenticate. But it works if I give this value for the parameter :


What am I doing wrong? My guess is that my LDAP nodes are wrong but I cannot find why. Maybe a problem with objectClass values?


The LDAP client will query the server for a root DSE used as base DN if you omit this value. If slapd isn't set up correctly, ldapsearch fails to get a value for that and thus fails the query.

Details here: No Root DSE returned from OpenLDAP, quoting:

This is actually filed as bug #427842 agains Ubuntu 9.10 (karmic).

To fix this, copy the following to fixRootDSE.ldif:

dn: olcDatabase={-1}frontend,cn=config
changetype: modify
add: olcAccess
olcAccess: to dn.base="" by * read
olcAccess: to dn.base="cn=subschema" by * read

And execute

sudo ldapmodify -Y EXTERNAL -H ldapi:/// -f fixRootDSE.ldif

This should give anonymous access to the root DSE.

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