Nov 19, 2009 - [tac_plus] Re: One stupid question about ldapsearch in CentOS. Hi Lou, 'yum install openldap-clients' should give you what you need.
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Apache Knox uses Apache Shiro provider for authentication. The Shiro provider defined in the gateway topology can use either LDAP realm or PAM realm to authenticate a user against directory services.
LDAP Configurations
The following LDAP specific configuration is added to the Shiro provider. These parameters work with both openLDAP and AD.
Basic LDAP Configurations
The example below will work for direct distinguished name (DN) of any username provided by client. If the LDAP DIT is complex where users can belong to different branches then use search base parameters described under Advanced LDAP configurations.
ldapRealm: Shiro realm org.apache.shiro.realm.ldap.JndiLdapRealm can also be used for basic configurations but authorization is disabled by default. For advanced configurations and support for authorization, caching, ldap group search, it should be replaced by org.apache.hadoop.gateway.shirorealm.KnoxLdapRealm.
contextFactory.url: This is the LDAP server url and port. If LDAP is used with SSL, the protocol will change to ldaps and ssl port where ldap server is listening.
main.ldapRealm.userDnTemplate: This template expects distinguished name of a user. uid parameter can also include a specific user by replacing {0} with an actual username. User DN parameter above is based on user.ldif configuration defined for default Apache DS demo LDAP that comes with Apache Knox and will have to be changed depending on LDAP DIT that is being used. Active directory expects cn={0} rather than uid={0}.
authenticationMechanism: Apache Knox supports only simple authentication.
urls/**:Same Shiro filter will be used for all paths into the application.
Advanced LDAP Configurations
userSearchBase: This is a mandatory field to be used along with the search attribute. Users belonging to this subset of users will be searched. The value for searchBase can be as narrow as possible to avoid performance issue resulting from lot of records returned due to broad search. Number of records returned will follow the individual LDAP limit.
userSearchAttributeName: Attribute from the user DN that will be searched. Any of the attribute that forms a user DN can be used here like uid, email, sAMAccountName etc. Failed to checkout vray gui license. This need not be part of bindDN used to search user.
userObjectClass: This is optional parameter to indicate the type of user object. This information can be found in the user record.
userSearchBase: This will replace searchBase when used in conjunction with group lookup.
userSearchAttributeName: also needs to be defined and behavior is same as previous example.
systemUsername: System user DN.
systemPassword: For testing, the system user’s password can be directly provided in the topology file but for production the password needs to be stored in credential store. In that case, value will change to ${ALIAS=ldcSystemPassword}.
groupSearchBase: searchBase used to search for group.
groupIdAttribute: Attribute from the group DN that will be searched.
memberAttribute:Â Search will be limited to information provided by this attribute.
PAM configurations
Other LDAP servers like Tivoli AD can use PAM authentication to authenticate user with Knox. To integrate LDAP server with Knox using PAM authentication, make the following changes.
Testing Authentication
NOTE:
2. ldapsearch and ldapwhoami will work with both OpenLDAP/Active Directory.
3. Active Directory can also use dsquery tool to search users from Windows server 2008 command prompt with Run as administrator option.
Examples:
4. To store system password in the credential store, following command can be used. /usr/iop/current/knox-server/bin/knoxcli.sh create-alias ldcSystemPassword –cluster <topology_name> –value <system_password> Comments are closed.
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