Kerberos

Below is an example and description of configuring an Identity Provider that integrates with a Kerberos Key Distribution Center (KDC) to authenticate users.

<provider>
    <identifier>kerberos-identity-provider</identifier>
    <class>org.apache.nifi.registry.web.security.authentication.kerberos.KerberosIdentityProvider</class>
    <property name="Default Realm">NIFI.APACHE.ORG</property>
    <property name="Kerberos Config File">/etc/krb5.conf</property>
    <property name="Authentication Expiration">12 hours</property>
</provider>

With this configuration, username/password authentication can be enabled by referencing this provider in nifi-registry.properties.

nifi.registry.security.user.identity.provider=kerberos-identity-provider

Property Name	Description
Authentication Expiration	The duration for which the user authentication is valid. If the user never logs out, they will be required to log back in following this duration.
Default Realm	Default realm to provide when user enters incomplete user principal (i.e. NIFI.APACHE.ORG).
Kerberos Config File	Absolute path to Kerberos client configuration file.