PropertyFileLoginModule

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Authenticate Users with Jetty JAAS PropertyFileLoginModule

Configure kPow to read authentication and role information from a property file.
Use the exact configuration in this guide to restrict access to the following user/password/roles:
admin/admin/kafka-admins
jetty/jetty/kafka-users
other/other/kafka-admins+kafka-users
plain/plain/content-administrators
user/password/kafka-users
See: Jetty PropertyFileLoginModule guide to update user and password configuration.
Configuration
To enable PropertyFileLoginModule authentication:
Create a JAAS configuration file that tells the JVM what JAAS Module is in use.
Create a users property file containing information on users, passwords, and roles.
Set the AUTH_PROVIDER_TYPE=jetty environment variable.
Start the JAR or Docker container with -Djava.security.auth.login.config=/path/to/jaas.conf
JAAS Configuration
Create a JAAS PropertyFile configuration file (the kpow realm is very important).
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kpow {
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        org.eclipse.jetty.jaas.spi.PropertyFileLoginModule required
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        file="/opt/kpow/user.props";
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      };
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Create a users property file at the path configured in your JAAS config.
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# This file defines users passwords and roles for a HashUserRealm
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#
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# The format is
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#  <username>: <password>[,<rolename> ...]
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#
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# Passwords may be clear text, obfuscated or checksummed.  The class
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# org.eclipse.jetty.util.security.Password should be used to generate obfuscated
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# passwords or password checksums
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#
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# If DIGEST Authentication is used, the password must be in a recoverable
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# format, either plain text or OBF:.
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#
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# Credentials are jetty/jetty, admin/admin, other/other, plain/plain,
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#                 user/password, and digest/digest
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#
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jetty: MD5:164c88b302622e17050af52c89945d44,kafka-users
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admin: CRYPT:adpexzg3FUZAk,kafka-admins
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other: OBF:1xmk1w261u9r1w1c1xmq,kafka-admins,kafka-users
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plain: plain,content-administrators
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user: password,kafka-users
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# This entry is for digest auth.  The credential is a MD5 hash of
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# username:realmname:password
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digest: MD5:6e120743ad67abfbc385bc2bb754e297,kafka-users
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Environment Configuration
To activate Jetty JAAS authentication set the environment variable AUTH_PROVIDER_TYPE=jetty
JAR Startup
Specify the JAAS config file by setting the following system property when starting the JAR:
  -Djava.security.auth.login.config=/path/to/jaas.conf 
Note: System properties must come after java but before -jar.
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AUTH_PROVIDER_TYPE=jetty \
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<... more env vars ...> \
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java -Djava.security.auth.login.config=/opt/kpow/jaas.conf -jar /opt/kpow/latest.jar 
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Docker Container Startup
Note: The JVM provides an environment variable called JAVA_TOOL_OPTIONS that can be used in place of system properties. We use this to thread the JAAS config to Docker.
Set the env var JAVA_TOOL_OPTIONS=-Djava.security.auth.login.config=/path/to/jaas.conf
Note: When your JAAS config is on the host machine and not within the container you will need to configure a docker volume mount so that kPow can read that configuration:
docker run --volume="/config/path:/config/path/" -p 3000:3000 --env-file ...
When starting the docker container you will see logging output similar to:
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Picked up JAVA_TOOL_OPTIONS: -Djava.security.auth.login.config=/path/to/jaas.conf
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Form or Basic Authentication?
kPow supports both form-based and basic authentication.
Form authentication is the default. To basic authentication, set the environment variable:
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JETTY_AUTH_METHOD=basic
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User Experience
When configured your users will be prompted to authenticate on each new browser session.

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Contents

Configuration

JAAS Configuration

Environment Configuration

JAR Startup

Docker Container Startup

Form or Basic Authentication?

User Experience