LDAP Settings

LDAP stores users and groups in a hierarchical tree structure, built from containers including the organizational unit (ou), organization (o), and domain controller (dc). The path to each entry is a Distinguished Name (DN) that uniquely identifies a user or group.

User and group names typically have attributes such as a common name (cn) or unique ID (uid).

Specify the DN as a string, for example cn=admin,dc=example,dc=com. White space is ignored.

Zeppelin LDAP authentication uses templates for user DNs.

ldapRealm

specifies the class name to use for LDAP authentication. You should set this to org.apache.zeppelin.realm.LdapRealm unless you are familiar with LDAP and prefer to use org.apache.shiro.realm.ldap.JndiLdapRealm. ..

ldapRealm.contextFactory.environment[ldap.searchBase]

defines the base distinguished name from which the LDAP search starts. Shiro searches for userDnTemplate at this address.

If the protocol is specified as ldap, SSL is not used. If the protocol is specified as ldaps, access is over SSL.

ldapRealm.userDnTemplate

specifies the search location where the user is to be found. Shiro replaces {0} with the username acquired from the Zeppelin UI. Zeppelin uses User DN templates to configure associated realms.

ldapRealm.contextFactory.url

specifies the host and port on which LDAP is running.

If the protocol element is specified as ldap, SSL will not be used. If the protocol is specified as ldaps, access will be over SSL.

Note: If LDAP is using a self-signed certificate, import the certificate into the truststore of JVM running Zeppelin; for example:

echo -n | openssl s_client –connect ldap.example.com:389 | \
    sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /tmp/examplecert.crt

keytool –import \
    -keystore $JAVA_HOME/jre/lib/security/cacerts \
    -storepass changeit \
    -noprompt \
    -alias mycert \
    -file /tmp/examplecert.crt

ldapRealm.contextFactory.systemUsername

ldapRealm.contextFactory.systemPassword

define the username and password that Zeppelin uses to connect to LDAP, to search for users and groups. These two settings are used for controlling access to UI features, not for authentication. The Bind method does not require a valid user password.

Examples:

ldapRealm.contextFactory.systemUsername=uid=guest,ou=people,dc=hadoop,dc=apache,dc=org

ldapRealm.contextFactory.systemPassword=somePassword

ldapRealm.authorizationCachingEnabled

specifies whether to use caching to improve performance. To enable caching, set this property to true.