bitnami/redis-sentinel

Bitnami Secure Image for Redis® Sentinel

Redis® Sentinel provides high availability for Redis. Redis Sentinel also provides other collateral tasks such as monitoring, notifications and acts as a configuration provider for clients.

https://redis.io Disclaimer: Redis is a registered trademark of Redis Ltd. Any rights therein are reserved to Redis Ltd. Any use by Bitnami is for referential purposes only and does not indicate any ***hip, endorsement, or affiliation between Redis Ltd.

TL;DR

console
docker run --name redis-sentinel -e REDIS_MASTER_HOST=redis REGISTRY_NAME/bitnami/redis-sentinel:latest

Warning: This quick setup is only intended for development environments. You are encouraged to change the insecure default credentials and check out the available configuration options in the Environment Variables section for a more secure deployment.

Why use a non-root container?

Non-root container images add an extra layer of security and are generally recommended for production environments. However, because they run as a non-root user, privileged tasks are typically off-limits. Learn more about non-root containers https://techdocs.broadcom.com/us/en/vmware-tanzu/application-catalog/tanzu-application-catalog/services/tac-doc/apps-tutorials-work-with-non-root-containers-index.html.

Supported tags and respective Dockerfile links

Learn more about the Bitnami tagging policy and the difference between rolling tags and immutable tags https://techdocs.broadcom.com/us/en/vmware-tanzu/application-catalog/tanzu-application-catalog/services/tac-doc/apps-tutorials-understand-rolling-tags-containers-index.html.

Get this image

The recommended way to get the Bitnami Redis(R) Sentinel Docker Image is to pull the prebuilt image from the https://hub.docker.com/r/bitnami/redis-sentinel.

console
docker pull REGISTRY_NAME/bitnami/redis-sentinel:latest

To use a specific version, you can pull a versioned tag. You can view the https://hub.docker.com/r/bitnami/redis-sentinel/tags/ in the Docker Hub Registry.

console
docker pull REGISTRY_NAME/bitnami/redis-sentinel:[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.

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

Connecting to other containers

Using https://docs.docker.com/engine/userguide/networking/, a Redis(R) server running inside a container can easily be accessed by your application containers.

Containers attached to the same network can communicate with each other using the container name as the hostname.

Using the Command Line

In this example, we will create a Redis(R) Sentinel instance that will monitor a Redis(R) instance that is running on the same docker network.

Step 1: Create a network

console
docker network create app-tier --driver bridge

Step 2: Launch the Redis(R) instance

Use the --network app-tier argument to the docker run command to attach the Redis(R) container to the app-tier network.

console
docker run -d --name redis-server \
    -e ALLOW_EMPTY_PASSWORD=yes \
    --network app-tier \
    REGISTRY_NAME/bitnami/redis:latest

Step 3: Launch your Redis(R) Sentinel instance

Finally we create a new container instance to launch the Redis(R) client and connect to the server created in the previous step:

console
docker run -it --rm \
    -e REDIS_MASTER_HOST=redis-server \
    --network app-tier \
    REGISTRY_NAME/bitnami/redis-sentinel:latest

Configuration

The following section describes the supported environment variables

Environment variables

The following tables list the main variables you can set.

Customizable environment variables

Read-only environment variables

Securing Redis(R) Sentinel traffic

Starting with version 6, Redis(R) adds the support for SSL/TLS connections. Should you desire to enable this optional feature, you may use the aforementioned REDIS_SENTINEL_TLS_* environment variables to configure the application.

When enabling TLS, conventional standard traffic is disabled by default. However this new feature is not mutually exclusive, which means it is possible to listen to both TLS and non-TLS connection simultaneously. To enable non-TLS traffic, set REDIS_SENTINEL_PORT_NUMBER to another port different than 0.

1. Using docker run

   console
   $ docker run --name redis-sentinel \
       -v /path/to/certs:/opt/bitnami/redis/certs \
       -v /path/to/redis-sentinel/persistence:/bitnami \
       -e REDIS_MASTER_HOST=redis \
       -e REDIS_SENTINEL_TLS_ENABLED=yes \
       -e REDIS_SENTINEL_TLS_CERT_FILE=/opt/bitnami/redis/certs/redis.crt \
       -e REDIS_SENTINEL_TLS_KEY_FILE=/opt/bitnami/redis/certs/redis.key \
       -e REDIS_SENTINEL_TLS_CA_FILE=/opt/bitnami/redis/certs/redisCA.crt \
       REGISTRY_NAME/bitnami/redis-cluster:latest
       REGISTRY_NAME/bitnami/redis-sentinel:latest
   

Alternatively, you may also provide with this configuration in your https://github.com/bitnami/containers/blob/main/bitnami/redis-sentinel#configuration-file configuration file.

Configuration file

The image looks for configurations in /bitnami/redis-sentinel/conf/. You can mount a volume at /bitnami and copy/edit the configurations in the /path/to/redis-persistence/redis-sentinel/conf/. The default configurations will be populated to the conf/ directory if it's empty.

Step 1: Run the Redis(R) Sentinel image

Run the Redis(R) Sentinel image, mounting a directory from your host.

console
docker run --name redis-sentinel \
    -e REDIS_MASTER_HOST=redis \
    -v /path/to/redis-sentinel/persistence:/bitnami \
    REGISTRY_NAME/bitnami/redis-sentinel:latest

Step 2: Edit the configuration

Edit the configuration on your host using your favorite editor.

console
vi /path/to/redis-persistence/redis-sentinel/conf/redis.conf

Step 3: Restart Redis(R)

After changing the configuration, restart your Redis(R) container for changes to take effect.

console
docker restart redis

Refer to the Redis(R) configuration manual for the complete list of configuration options.

FIPS configuration in Bitnami Secure Images

The Bitnami Redis® Sentinel Docker image from the https://go-vmware.broadcom.com/contact-us 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.

Logging

The Bitnami Redis(R) Sentinel Docker Image sends the container logs to the stdout. To view the logs:

console
docker logs redis

You can configure the containers https://docs.docker.com/engine/admin/logging/overview/ using the --log-driver option if you wish to consume the container logs differently. In the default configuration docker uses the json-file driver.

Notable Changes

Starting January 16, 2024

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

4.0.14-debian-9-r201, 4.0.14-ol-7-r222, 5.0.5-debian-9-r169, 5.0.5-ol-7-r175

• Decrease the size of the container. The configuration logic is now based on Bash scripts in the rootfs/ folder.

4.0.10-r25

• The Redis(R) sentinel container has been migrated to a non-root container approach. Previously the container run as root user and the redis daemon was started as redis user. From now own, both the container and the redis daemon run as user 1001. As a consequence, the configuration files are writable by the user running the redis process. You can revert this behavior by changing USER 1001 to USER root in the Dockerfile.

License

Copyright © 2026 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.