bitnami-containers/bitnami/ksql

Bitnami Secure Image for Confluent KSQL DB

What is Confluent KSQL DB?

ksqlDB is a database for building stream processing applications on top of Apache Kafka. It is distributed, scalable, reliable, and real-time.

Overview of Confluent KSQL DB Trademarks: This software listing is packaged by Bitnami. The respective trademarks mentioned in the offering are owned by the respective companies, and use of them does not imply any affiliation or endorsement.

TL;DR

docker run --name ksql bitnami/ksql:latest

Why use Bitnami Secure Images?

Those are hardened, minimal CVE images built and maintained by Bitnami. Bitnami Secure Images are based on the cloud-optimized, security-hardened enterprise OS Photon Linux. Why choose BSI images?

• Hardened secure images of popular open source software with Near-Zero Vulnerabilities
• Vulnerability Triage & Prioritization with VEX Statements, KEV and EPSS Scores
• Compliance focus with FIPS, STIG, and air-gap options, including secure bill of materials (SBOM)
• Software supply chain provenance attestation through in-toto
• First class support for the internet’s favorite Helm charts

Each image comes with valuable security metadata. You can view the metadata in our public catalog here. Note: Some data is only available with commercial subscriptions to BSI.

If you are looking for our previous generation of images based on Debian Linux, please see the Bitnami Legacy registry.

Supported tags and respective Dockerfile links

Learn more about the Bitnami tagging policy and the difference between rolling tags and immutable tags in our documentation page.

You can see the equivalence between the different tags by taking a look at the tags-info.yaml file present in the branch folder, i.e bitnami/ASSET/BRANCH/DISTRO/tags-info.yaml.

Subscribe to project updates by watching the bitnami/containers GitHub repo.

Get this image

The recommended way to get the Bitnami ksql Docker Image is to pull the prebuilt image from the Docker Hub Registry.

docker pull bitnami/ksql:latest

To use a specific version, you can pull a versioned tag. You can view the list of available versions in the Docker Hub Registry.

docker pull bitnami/ksql:[TAG]

If you wish, you can also build the image yourself by cloning the repository, changing to the directory containing the Dockerfile and executing the docker build command. Remember to replace the APP, VERSION and OPERATING-SYSTEM path placeholders in the example command below with the correct values.

git clone https://github.com/bitnami/containers.git
cd bitnami/APP/VERSION/OPERATING-SYSTEM
docker build -t bitnami/APP:latest .

Environment variables

Customizable environment variables

Name	Description	Default Value
KSQL_MOUNTED_CONF_DIR	Directory for including custom configuration files (that override the default generated ones)	${KSQL_VOLUME_DIR}/etc
KSQL_LISTENERS	Comma-separated list of listeners that listen for API requests over either HTTP or HTTPS.	nil
KSQL_SSL_KEYSTORE_PASSWORD	Password to access the SSL keystore.	nil
KSQL_SSL_TRUSTSTORE_PASSWORD	Password to access the SSL truststore.	nil
KSQL_CLIENT_AUTHENTICATION	Client authentication configuration. Valid options: none, requested, over required.	nil
KSQL_BOOTSTRAP_SERVERS	The set of Kafka brokers to bootstrap Kafka cluster information from.	nil

Read-only environment variables

Name	Description	Value
KSQL_BASE_DIR	Base path for KSQL files.	${BITNAMI_ROOT_DIR}/ksql
KSQL_VOLUME_DIR	KSQL directory for persisted files.	${BITNAMI_VOLUME_DIR}/ksql
KSQL_DATA_DIR	KSQL data directory.	${KSQL_VOLUME_DIR}/data
KSQL_BIN_DIR	KSQL bin directory.	${KSQL_BASE_DIR}/bin
KSQL_CONF_DIR	KSQL configuration directory.	${KSQL_BASE_DIR}/etc/ksqldb
KSQL_LOGS_DIR	KSQL logs directory.	${KSQL_BASE_DIR}/logs
KSQL_CONF_FILE	Main KSQL configuration file.	${KSQL_CONF_DIR}/ksql-server.properties
KSQL_CERTS_DIR	KSQL certificates directory.	${KSQL_BASE_DIR}/certs
KSQL_CONNECTION_TIMEOUT	KSQL connection attempt timeout.	10
KSQL_DAEMON_USER	Users that will execute the KSQL Server process.	ksql
KSQL_DAEMON_GROUP	Group that will execute the KSQL Server process.	ksql
KSQL_DEFAULT_LISTENERS	Comma-separated list of listeners that listen for API requests over either HTTP or HTTPS.	http://0.0.0.0:8088
KSQL_DEFAULT_BOOTSTRAP_SERVERS	List of Kafka brokers to bootstrap Kafka cluster information from.	localhost:9092

FIPS configuration in Bitnami Secure Images

The Bitnami Confluent KSQL DB Docker image from the Bitnami Secure Images catalog includes extra features and settings to configure the container with FIPS capabilities. You can configure the next environment variables:

• OPENSSL_FIPS: whether OpenSSL runs in FIPS mode or not. yes (default), no.

Notable Changes

Starting January 16, 2024

• The docker-compose.yaml file has been removed, as it was solely intended for internal testing purposes.

Contributing

We'd love for you to contribute to this container. You can request new features by creating an issue or submitting a pull request with your contribution.

Issues

If you encountered a problem running this container, you can file an issue. For us to provide better support, be sure to fill the issue template.

License

Copyright © 2025 Broadcom. The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.