Axon Reference Guide
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Access Control - LDAP

This extension will allow you to use LDAP for authentication and authorization in Axon Server. User accounts and roles from LDAP are not synchronized to the Axon Server cluster, so they won't show up on the "Users" tab.

Installing the LDAP Extension

To install the LDAP Extension, you need to unpack the distribution ZIP-file, so the JAR files are in the "exts" subdirectory of the working directory of Axon Server:
$ mkdir exts
$ unzip -j axon-server-extension-ldap-4.5.1-bin.zip -d exts
Archive: axon-server-extension-ldap-4.5-bin.zip
inflating: exts/axon-server-extension-ldap-4.5.1-sources.jar
inflating: exts/axon-server-extension-ldap-4.5.1.jar
inflating: exts/javax.inject-1.jar
inflating: exts/spring-ldap-core-2.3.4.RELEASE.jar
inflating: exts/spring-security-ldap-5.4.7.jar
$
Note that version 4.5.1 is the current version at the time of Axon Server 4.5.13.

Configuring the LDAP Extension

The options used are:
  • axoniq.axonserver.accesscontrol.enabled
    This must be set to "true" to enable access control.
  • axoniq.axonserver.enterprise.ldap.enabled
    Set this to "true" to enable the plugin.
  • axoniq.axonserver.enterprise.ldap.server-name
    This sets the LDAP server's hostname, which is defaulted to "localhost".
  • axoniq.axonserver.enterprise.ldap.server-port
    This sets the LDAP server's port, which is defaulted to 389.
  • axoniq.axonserver.enterprise.ldap.server-url
    As an alternative, for example when you want to use a TLS-secured connection, you can provide the URL to the LDAP server, such as "ldaps://ldap-server.local".
  • axoniq.axonserver.enterprise.ldap.initialBindUserDN
    If the LDAP server does not accept unauthenticated initial binds, set the DN of the user for that, for example "cn=admin,dc=demo,dc=io". Only if both this property and the corresponding password are set, will they be used.
  • axoniq.axonserver.enterprise.ldap.initialBindPassword
    If the LDAP server does not accept unauthenticated initial binds, set the password for that. Only if both this property and the corresponding User DN are set, will they be used.
  • axoniq.axonserver.enterprise.ldap.search-base
    This setting provides the base context for searching users, for example "ou=people,dc=planetexpress,dc=com".
  • axoniq.axonserver.enterprise.ldap.search-filter
    This is the filter to be used for searching, so you typically add object types, and the attribute to match on. An example would be "(&(objectClass=inetOrgPerson)(uid={0}))". The "{0}" notation is used to place the username.
    • axoniq.axonserver.enterprise.ldap.group-base
      Similarly to the "search-base" setting, you can add a "group-base". This setting is optional and normally not needed.
  • axoniq.axonserver.enterprise.ldap.group-filter
    The "group-filter" is the search pattern for groups, which will be translated to roles, for example "(&(objectclass=Group)(member={0}))"

Active Directory specific settings

When using ActiveDirectory, the following properties are needed:
  • axoniq.axonserver.enterprise.ldap.activeDirectory
    This must be set to "true".
  • axoniq.axonserver.enterprise.ldap.adDomain
    This must be set to the AD Domain serviced by the controller.
An example of an Active Directory configuration is:
axoniq.axonserver.accesscontrol.enabled=true
axoniq.axonserver.enterprise.ldap.enabled=true
axoniq.axonserver.enterprise.ldap.activeDirectory=true
axoniq.axonserver.enterprise.ldap.serverName=my-ad
axoniq.axonserver.enterprise.ldap.adDomain=demo.io
axoniq.axonserver.enterprise.ldap.searchFilter=(&(objectClass=user)(sAMAccountName={1}))
axoniq.axonserver.enterprise.ldap.roles.AxonAdmin=ADMIN@_admin

Linking LDAP groups to roles in Axon Server

In order to translate LDAP Groups, you must provide properties as follows:
axoniq.axonserver.enterprise.ldap.roles.<group-name>=<role>
For example, if we have a group "ADMIN_STAFF" that we want to make administrators, and a group "SHIP_CREW" that should be normal users of the "default" context, then we would use:
axoniq.axonserver.enterprise.ldap.roles.ADMIN_STAFF=ADMIN@_admin
axoniq.axonserver.enterprise.ldap.roles.SHIP_CREW=USE_CONTEXT@default

Tuning the LDAP Extension

Two further options exist that may be used to tune the connection with the LDAP server. Both have a default value of "true".
  • axoniq.axonserver.enterprise.ldap.using-pooled-queries
  • axoniq.axonserver.enterprise.ldap.allowing-referrals
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