I have two machines with CentOS 7.0 on each one. The first one is domain controller with OpenLDAP only. I configured OpenLDAP according this tutorial: http://www.server-world.info/en/note?os=CentOS_7&p=openldap

Then, I have another machine with GitLab. I'm trying to configure LDAP authentication, but each time I receive 'Invalid Credentials' error.

My GitLab config:

gitlab-rails": {
  "ldap_enabled": true,
  "ldap_servers": {
    "main": {
      "label": "LDAP",
      "host": "",
      "port": 389,
      "uid": "uid",
      "method": "plain",
      "bind_dn": "CN=gitlab,OU=people,DC=courseproject,DC=org",
      "password": "mypass",
      "active_directory": false,
      "allow_username_or_email_login": false,
      "base": "OU=people,DC=courseproject,DC=org",
      "user_filter": ""

I have to use plain auth and LDAP, not LDAPS for another project.

My users & groups configuration:

dn: dc=courseproject,dc=org
objectClass: top
objectClass: dcObject
objectclass: organization
o: courseproject org
dc: courseproject

dn: cn=admin,dc=courseproject,dc=org
objectClass: simpleSecurityObject
objectClass: organizationalRole
cn: admin
userPassword: mySHApass

dn: ou=people,dc=courseproject,dc=org
objectClass: organizationalUnit
ou: people

dn: ou=groups,dc=courseproject,dc=org
objectClass: organizationalUnit
ou: groups

I'm not really familiar with OpenLDAP, had only previous experience with AD.

What information can I provide for investigating this issue?


First of all, you shall probably change the configuration for allow_username_or_email_login to true.

Then you probably want to create a group gitlabusers holding the users you wish to grant access to the server and modify the user_filter to '(memberOf=cn=gitlabusers,ou=groups,dc=courseproject,dc=org)'

Then apply the changes using gitlab-ctl reconfigure and check the LDAP configuration using

   gitlab-rake gitlab:ldap:check RAILS_ENV=production

Unless this command succeed to give you the list of users you expect, you have a mistake in your configuration...

For info, my below configuration (against a FreeIPA server) works:

 gitlab_rails['ldap_enabled'] = true 
 gitlab_rails['ldap_servers'] = YAML.load <<-'EOS' # remember to close this block with 'EOS' below
   main: # 'main' is the GitLab 'provider ID' of this LDAP server
     label: 'IPA'
     host: 'ipa.mydomain.com'
     port: 389
     uid: 'uid'
     method: 'tls' # "tls" or "ssl" or "plain"
     bind_dn: 'uid=gitlab,cn=sysaccounts,cn=etc,dc=mydomain,dc=com'
     password: '<password>'
     active_directory: false
     allow_username_or_email_login: true
     #block_auto_created_users: false
     base: 'cn=users,cn=accounts,dc=mydomain,dc=com'
     user_filter: '(memberOf=cn=gitlabusers,cn=groups,cn=accounts,dc=mydomain,dc=com)'
     ## EE only
     group_base: 'cn=groups,cn=accounts,dc=mydomain,dc=com'
     #admin_group: ''
     #sync_ssh_keys: true
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