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quickstart-redpanda-serverless

README.md

Quick Start with Redpanda Serverless

This folder contains a variant of the Quick Start SSL app configured to use Redpanda Serverless as the target cluster. You may follow the instructions on Redpanda Docs to perform the following operations:

  • Deploy a Serverless Cluster.
  • Create a user that uses SCRAM-SHA-256 mechanism.
  • Create a topic.
  • Allow All permissions to the user on the topic.
  • Allow All permissions to the user on the consumer group quick-start-group.

The docker-compose.yml file has been revised to realize the integration with Redpanda Serverless as follows:

  • Removal of the broker service, because replaced by the remote cluster

  • kafka-connector:

    • Definition of new environment variables to configure remote endpoint, credentials, and topic name in the adapters.xml through the variable-expansion feature of Lightstreamer:

      ...
environment:
  - bootstrap_server=${bootstrap_server}
  - username=${username}
  - password=${password}
    # adapters.xml uses env variable "topic_mapping", built from env variable "topic"
  - topic_mapping=map.${topic}.to
...

    • Adaption of adapters.xml to include thw following changes:

      • Update of the parameter bootstrap.servers to the environment variable bootstrap_server:

        <param name="bootstrap.servers">$env.bootstrap_server</param>

      • Configuration of the encryption settings:

        <param name="encryption.enable">true</param>
<param name="encryption.protocol">TLSv1.2</param>
<param name="encryption.hostname.verification.enable">true</param>

      • Configuration of the authentication settings, with the credentials retrieved from environment variables username and password:

        <param name="authentication.enable">true</param>
<param name="authentication.mechanism">SCRAM-SHA-256</param>
<param name="authentication.username">$env.username</param>
<param name="authentication.password">$env.password</param>

      • Update of the parameter map.<topic>.to to the environment variable topic_mapping (which in turn is composed from env variable topic):

        <param name="$env.topic_mapping">item-template.stock</param>

  • producer:

    • Update of the parameter --bootstrap-servers from the environment variable bootstrap_server

    • Update of the parameter --topic from the environment variable topic

    • Provisioning of the producer.properties configuration file to enable SASL/SCRAM over TLS, with username and password retrieved from the environment variables username and password:

      # Configure SASL/PLAIN mechanism
sasl.mechanism=SCRAM-SHA-256
# Enable SSL encryption
security.protocol=SASL_SSL
# JAAS configuration
sasl.jaas.config=org.apache.kafka.common.security.scram.ScramLoginModule required username="${username}" password="${password}";

Run

From this directory, run follow the command:

$ bootstrap_server=<bootstrap_server> \
  username=<username> \
  password=<password> \
  topic=<topic> \
  ./start.sh

where:

  • <bootstrap_server> - The bootstrap server address of the Redpanda cluster
  • <username> and <password> - The credentials of the user created from the Redpanda Console
  • <topic> - The name of the topic created on the rpk tool or from the Redpanda Console

Then, point your browser to http://localhost:8080/QuickStart.