Docker REST Proxy image for the Confluent Open Source Platform using Oracle JDK

Supported tags and respective Dockerfile links:

• 3.2.2 (3.2.2/Dockerfile)
• 3.3.0 (3.3.0/Dockerfile)
• 3.3.1, latest (3.3.1/Dockerfile)

All tag names follow the naming convention of the Confluent Open Source Platform

Summary:

• Debian "slim" image variant
• Oracle JDK 8u152 addded, without MissionControl, VisualVM, JavaFX, ReadMe files, source archives, etc.
• Oracle Java Cryptography Extension added
• Python 2.7.9-1 & pip 9.0.1 added
• SHA 256 sum checks for all downloads
• JAVA_HOME environment variable set up
• Utility scripts added:
  • Confluent utility belt script ('cub') - a Python CLI for a Confluent tool called docker-utils
  • Docker utility belt script ('dub')
• Confluent REST Proxy added

Details:

This image was created with the sole purpose of offering the Confluent Open Source Platform running on top of Oracle JDK. Therefore, it follows the same structure as the one from the original repository. More precisely:

• tag 3.2.2 follows branch 3.2.x, and
• tags 3.3.0, 3.3.1 andlatest follow branch 3.3.x

Apart of the base image (mbe1224/confluent-base), it has REST Proxy added on top of it, installed using the following Confluent Debian package:

• confluent-kafka-rest-2.11

Usage:

Build the image

docker build -t mbe1224/confluent-rest-proxy ./3.3.1/

Run the container

docker run -d \
    --net=host \
    --name=kafka-rest \
    -e KAFKA_REST_ZOOKEEPER_CONNECT=localhost:32181 \
    -e KAFKA_REST_LISTENERS=http://localhost:8082 \
    -e KAFKA_REST_SCHEMA_REGISTRY_URL=http://localhost:8081 \
    mbe1224/confluent-rest-proxy

Environment variables:

One can use the following environment variables for configuring the ZooKeeper node:

#	Name	Default value	Meaning	Comments
1	KAFKA_REST_CUB_KAFKA_MIN_BROKERS	1	Expected number of brokers in the cluster	Check the Confluent utility belt script ('cub') - check_kafka_ready for more details
2	KAFKA_REST_CUB_KAFKA_TIMEOUT	40	Time in secs to wait for the number of Kafka nodes to be available.	Check the Confluent utility belt script ('cub') - check_kafka_ready for more details
3	KAFKA_REST_CUB_ZK_TIMEOUT	40	Time in secondss to wait for the Zookeeper to be available	Check the Confluent utility belt script ('cub') - check_zookeeper_ready for more details
4	KAFKA_REST_HOST_NAME	-	The host name used to generate absolute URLs in responses	Required
5	KAFKA_REST_ID	-	Unique ID for this REST server instance	This is used in generating unique IDs for consumers that do not specify their ID. The ID is empty by default, which makes a single server setup easier to get up and running, but is not safe for multi-server deployments where automatic consumer IDs are used
6	KAFKA_REST_JMX_OPTS	-	JMX options used for monitoring	KAFKA_REST_OPTS should contain 'com.sun.management.jmxremote.rmi.port' property
7	KAFKA_REST_LISTENERS	8082	Port for incomming connections	-
8	KAFKA_REST_LOG4J_LOGGERS	-	-	-
9	KAFKA_REST_LOG4J_ROOT_LOGLEVEL	INFO	-	-
10	KAFKA_REST_ZOOKEEPER_CONNECT	-	Specifies the ZooKeeper connection string in the form hostname:port where host and port are the host and port of a ZooKeeper server	To allow connecting through other ZooKeeper nodes when that ZooKeeper machine is down you can also specify multiple hosts in the form hostname1:port1,hostname2:port2,hostname3:port3

Moreover, one can use any of the properties specified in the Configuration Options by replacing "." with "_" and appending "KAFKA_REST_" before the property name. For example, instead of schema.registry.url use KAFKA_REST_SCHEMA_REGISTRY_URL.

Dual licensed under:

• MIT License
• Oracle Binary Code License Agreement