Redis™ packaged by Bitnami

What is Redis™?

Redis™ is an open source, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.

Overview of Redis™

This project has been forked from bitnami-docker-redis, We mainly modified the dockerfile in order to build the images of amd64 and arm64 architectures.

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

TL;DR

$ docker run --name redis -e ALLOW_EMPTY_PASSWORD=yes quay.io/drycc-addons/redis:6.2

Docker Compose

$ curl -sSL https://raw.githubusercontent.com/drycc-addons/drycc-docker-redis/main/docker-compose.yml > docker-compose.yml
$ docker-compose up -d

Warning: These quick setups are only intended for development environments. You are encouraged to change the insecure default credentials and check out the available configuration options in the Configuration section for a more secure deployment.

Get this image

The recommended way to get the Bitnami Redis(TM) Docker Image is to pull the prebuilt image from the Container Image Registry.

$ docker pull quay.io/drycc-addons/redis:6.2

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

$ docker pull quay.io/drycc-addons/redis:[TAG]

If you wish, you can also build the image yourself.

$ docker build -t quay.io/drycc-addons/redis:6.2 'https://github.com/drycc-addons/drycc-docker-redis.git#main:6.2/debian-10'

Persisting your database

Redis(TM) provides a different range of persistence options. This contanier uses AOF persistence by default but it is easy to overwrite that configuration in a docker-compose.yaml file with this entry command: /opt/drycc/scripts/redis/run.sh --appendonly no. Alternatively, you may use the REDIS_AOF_ENABLED env variable as explained in Disabling AOF persistence.

If you remove the container all your data will be lost, and the next time you run the image the database will be reinitialized. To avoid this loss of data, you should mount a volume that will persist even after the container is removed.

For persistence you should mount a directory at the /drycc path. If the mounted directory is empty, it will be initialized on the first run.

$ docker run \
    -e ALLOW_EMPTY_PASSWORD=yes \
    -v /path/to/redis-persistence:/drycc/redis/data \
    quay.io/drycc-addons/redis:6.2

You can also do this by modifying the docker-compose.yml file present in this repository:

services:
  redis:
  ...
    volumes:
      - /path/to/redis-persistence:/drycc/redis/data
  ...

NOTE: As this is a non-root container, the mounted files and directories must have the proper permissions for the UID 1001.

Connecting to other containers

Using Docker container networking, a Redis(TM) 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(TM) client instance that will connect to the server instance that is running on the same docker network as the client.

Step 1: Create a network

$ docker network create app-tier --driver bridge

Step 2: Launch the Redis(TM) server instance

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

$ docker run -d --name redis-server \
    -e ALLOW_EMPTY_PASSWORD=yes \
    --network app-tier \
    quay.io/drycc-addons/redis:6.2

Step 3: Launch your Redis(TM) client instance

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

$ docker run -it --rm \
    --network app-tier \
    quay.io/drycc-addons/redis:6.2 redis-cli -h redis-server

Using Docker Compose

When not specified, Docker Compose automatically sets up a new network and attaches all deployed services to that network. However, we will explicitly define a new bridge network named app-tier. In this example we assume that you want to connect to the Redis(TM) server from your own custom application image which is identified in the following snippet by the service name myapp.

version: '2'

networks:
  app-tier:
    driver: bridge

services:
  redis:
    image: 'quay.io/drycc-addons/redis:6.2'
    environment:
      - ALLOW_EMPTY_PASSWORD=yes
    networks:
      - app-tier
  myapp:
    image: 'YOUR_APPLICATION_IMAGE'
    networks:
      - app-tier

IMPORTANT:

Please update the YOUR_APPLICATION_IMAGE_ placeholder in the above snippet with your application image

In your application container, use the hostname redis to connect to the Redis(TM) server

Launch the containers using:

$ docker-compose up -d

Configuration

Disabling Redis(TM) commands

For security reasons, you may want to disable some commands. You can specify them by using the following environment variable on the first run:

REDIS_DISABLE_COMMANDS: Comma-separated list of Redis(TM) commands to disable. Defaults to empty.

$ docker run --name redis -e REDIS_DISABLE_COMMANDS=FLUSHDB,FLUSHALL,CONFIG quay.io/drycc-addons/redis:6.2

Alternatively, modify the docker-compose.yml file present in this repository:

services:
  redis:
  ...
    environment:
      - REDIS_DISABLE_COMMANDS=FLUSHDB,FLUSHALL,CONFIG
  ...

As specified in the docker-compose, FLUSHDB and FLUSHALL commands are disabled. Comment out or remove the environment variable if you don't want to disable any commands:

services:
  redis:
  ...
    environment:
      # - REDIS_DISABLE_COMMANDS=FLUSHDB,FLUSHALL
  ...

Passing extra command-line flags to redis-server startup

Passing extra command-line flags to the redis service command is possible by adding them as arguments to run.sh script:

$ docker run --name redis -e ALLOW_EMPTY_PASSWORD=yes quay.io/drycc-addons/redis:6.2 /opt/drycc/scripts/redis/run.sh --maxmemory 100mb

Alternatively, modify the docker-compose.yml file present in this repository:

services:
  redis:
  ...
    environment:
      - ALLOW_EMPTY_PASSWORD=yes
    command: /opt/drycc/scripts/redis/run.sh --maxmemory 100mb
  ...

Refer to the Redis(TM) documentation for the complete list of arguments.

Setting the server password on first run

Passing the REDIS_PASSWORD environment variable when running the image for the first time will set the Redis(TM) server password to the value of REDIS_PASSWORD (or the content of the file specified in REDIS_PASSWORD_FILE).

$ docker run --name redis -e REDIS_PASSWORD=password123 quay.io/drycc-addons/redis:6.2

Alternatively, modify the docker-compose.yml file present in this repository:

services:
  redis:
  ...
    environment:
      - REDIS_PASSWORD=password123
  ...

NOTE: The at sign (@) is not supported for REDIS_PASSWORD.

Warning The Redis(TM) database is always configured with remote access enabled. It's suggested that the REDIS_PASSWORD env variable is always specified to set a password. In case you want to access the database without a password set the environment variable ALLOW_EMPTY_PASSWORD=yes. This is recommended only for development.

Allowing empty passwords

By default the Redis(TM) image expects all the available passwords to be set. In order to allow empty passwords, it is necessary to set the ALLOW_EMPTY_PASSWORD=yes env variable. This env variable is only recommended for testing or development purposes. We strongly recommend specifying the REDIS_PASSWORD for any other scenario.

$ docker run --name redis -e ALLOW_EMPTY_PASSWORD=yes quay.io/drycc-addons/redis:6.2

Alternatively, modify the docker-compose.yml file present in this repository:

services:
  redis:
  ...
    environment:
      - ALLOW_EMPTY_PASSWORD=yes
  ...

Disabling AOF persistence

Redis(TM) offers different options when it comes to persistence. By default, this image is set up to use the AOF (Append Only File) approach. Should you need to change this behaviour, setting the REDIS_AOF_ENABLED=no env variable will disable this feature.

$ docker run --name redis -e REDIS_AOF_ENABLED=no quay.io/drycc-addons/redis:6.2

Alternatively, modify the docker-compose.yml file present in this repository:

services:
  redis:
  ...
    environment:
      - REDIS_AOF_ENABLED=no
  ...

Enabling Access Control List

Redis(TM) offers ACL since 6.0 which allows certain connections to be limited in terms of the commands that can be executed and the keys that can be accessed. We strongly recommend enabling ACL in production by specifiying the REDIS_ACLFILE.

$ docker run -name redis -e REDIS_ACLFILE=/opt/drycc/redis/mounted-etc/users.acl -v /path/to/users.acl:/opt/drycc/redis/mounted-etc/users.acl quay.io/drycc-addons/redis:6.2

Alternatively, modify the docker-compose.yml file present in this repository:

services:
  redis:
  ...
    environment:
      - REDIS_ACLFILE=/opt/drycc/redis/mounted-etc/users.acl
    volumes:
      - /path/to/users.acl:/opt/drycc/redis/mounted-etc/users.acl
  ...

Setting up a standalone instance

By default, this image is set up to launch Redis(TM) in standalone mode on port 6379. Should you need to change this behavior, setting the REDIS_PORT_NUMBER environment variable will modify the port number. This is not to be confused with REDIS_MASTER_PORT_NUMBER or REDIS_REPLICA_PORT environment variables that are applicable in replication mode.

$ docker run --name redis -e REDIS_PORT_NUMBER=7000 -p 7000:7000 quay.io/drycc-addons/redis:6.2

Alternatively, modify the docker-compose.yml file present in this repository:

services:
  redis:
  ...
    environment:
      - REDIS_PORT_NUMBER=7000
    ...
    ports:
      - '7000:7000'
  ....

Setting up replication

A replication cluster can easily be setup with the Bitnami Redis(TM) Docker Image using the following environment variables:

REDIS_REPLICATION_MODE: The replication mode. Possible values master/slave. No defaults.
REDIS_REPLICA_IP: The replication announce ip. Defaults to $(get_machine_ip) which return the ip of the container.
REDIS_REPLICA_PORT: The replication announce port. Defaults to REDIS_MASTER_PORT_NUMBER.
REDIS_MASTER_HOST: Hostname/IP of replication master (replica node parameter). No defaults.
REDIS_MASTER_PORT_NUMBER: Server port of the replication master (replica node parameter). Defaults to 6379.
REDIS_MASTER_PASSWORD: Password to authenticate with the master (replica node parameter). No defaults. As an alternative, you can mount a file with the password and set the REDIS_MASTER_PASSWORD_FILE variable.

In a replication cluster you can have one master and zero or more replicas. When replication is enabled the master node is in read-write mode, while the replicas are in read-only mode. For best performance its advisable to limit the reads to the replicas.

Step 1: Create the replication master

The first step is to start the Redis(TM) master.

$ docker run --name redis-master \
  -e REDIS_REPLICATION_MODE=master \
  -e REDIS_PASSWORD=masterpassword123 \
  quay.io/drycc-addons/redis:6.2

In the above command the container is configured as the master using the REDIS_REPLICATION_MODE parameter. The REDIS_PASSWORD parameter enables authentication on the Redis(TM) master.

Step 2: Create the replica node

Next we start a Redis(TM) replica container.

$ docker run --name redis-replica \
  --link redis-master:master \
  -e REDIS_REPLICATION_MODE=slave \
  -e REDIS_MASTER_HOST=master \
  -e REDIS_MASTER_PORT_NUMBER=6379 \
  -e REDIS_MASTER_PASSWORD=masterpassword123 \
  -e REDIS_PASSWORD=password123 \
  quay.io/drycc-addons/redis:6.2

In the above command the container is configured as a slave using the REDIS_REPLICATION_MODE parameter. The REDIS_MASTER_HOST, REDIS_MASTER_PORT_NUMBER and REDIS_MASTER_PASSWORD parameters are used connect and authenticate with the Redis(TM) master. The REDIS_PASSWORD parameter enables authentication on the Redis(TM) replica.

You now have a two node Redis(TM) master/replica replication cluster up and running which can be scaled by adding/removing replicas.

If the Redis(TM) master goes down you can reconfigure a replica to become a master using:

$ docker exec redis-replica redis-cli -a password123 SLAVEOF NO ONE

Note: The configuration of the other replicas in the cluster needs to be updated so that they are aware of the new master. In our example, this would involve restarting the other replicas with --link redis-replica:master.

With Docker Compose the master/replica mode can be setup using:

version: '2'

services:
  redis-master:
    image: 'quay.io/drycc-addons/redis:6.2'
    ports:
      - '6379'
    environment:
      - REDIS_REPLICATION_MODE=master
      - REDIS_PASSWORD=my_master_password
    volumes:
      - '/path/to/redis-persistence:/drycc'

  redis-replica:
    image: 'quay.io/drycc-addons/redis:6.2'
    ports:
      - '6379'
    depends_on:
      - redis-master
    environment:
      - REDIS_REPLICATION_MODE=slave
      - REDIS_MASTER_HOST=redis-master
      - REDIS_MASTER_PORT_NUMBER=6379
      - REDIS_MASTER_PASSWORD=my_master_password
      - REDIS_PASSWORD=my_replica_password

Scale the number of replicas using:

$ docker-compose up --detach --scale redis-master=1 --scale redis-secondary=3

The above command scales up the number of replicas to 3. You can scale down in the same way.

Note: You should not scale up/down the number of master nodes. Always have only one master node running.

Securing Redis(TM) traffic

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

REDIS_TLS_ENABLED: Whether to enable TLS for traffic or not. Defaults to no.
REDIS_TLS_PORT: Port used for TLS secure traffic. Defaults to 6379.
REDIS_TLS_CERT_FILE: File containing the certificate file for the TSL traffic. No defaults.
REDIS_TLS_KEY_FILE: File containing the key for certificate. No defaults.
REDIS_TLS_CA_FILE: File containing the CA of the certificate. No defaults.
REDIS_TLS_DH_PARAMS_FILE: File containing DH params (in order to support DH based ciphers). No defaults.
REDIS_TLS_AUTH_CLIENTS: Whether to require clients to authenticate or not. Defaults to yes.

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_TLS_PORT to another port different than 0.

Using docker run

$ docker run --name redis \
    -v /path/to/certs:/opt/drycc/redis/certs \
    -v /path/to/redis-data-persistence:/drycc/redis/data \
    -e ALLOW_EMPTY_PASSWORD=yes \
    -e REDIS_TLS_ENABLED=yes \
    -e REDIS_TLS_CERT_FILE=/opt/drycc/redis/certs/redis.crt \
    -e REDIS_TLS_KEY_FILE=/opt/drycc/redis/certs/redis.key \
    -e REDIS_TLS_CA_FILE=/opt/drycc/redis/certs/redisCA.crt \
    quay.io/drycc-addons/redis:6.2

Modifying the docker-compose.yml file present in this repository:

services:
  redis:
  ...
    environment:
      ...
      - REDIS_TLS_ENABLED=yes
      - REDIS_TLS_CERT_FILE=/opt/drycc/redis/certs/redis.crt
      - REDIS_TLS_KEY_FILE=/opt/drycc/redis/certs/redis.key
      - REDIS_TLS_CA_FILE=/opt/drycc/redis/certs/redisCA.crt
    ...
    volumes:
      - /path/to/certs:/opt/drycc/redis/certs
      - /path/to/redis-persistence:/drycc/redis/data
  ...

Alternatively, you may also provide with this configuration in your custom configuration file.

Configuration file

The image looks for configurations in /opt/drycc/redis/mounted-etc/redis.conf. You can overwrite the redis.conf file using your own custom configuration file.

$ docker run --name redis \
    -e ALLOW_EMPTY_PASSWORD=yes \
    -v /path/to/your_redis.conf:/opt/drycc/redis/mounted-etc/redis.conf \
    -v /path/to/redis-data-persistence:/drycc/redis/data \
    quay.io/drycc-addons/redis:6.2

Alternatively, modify the docker-compose.yml file present in this repository:

services:
  redis:
  ...
    volumes:
      - /path/to/your_redis.conf:/opt/drycc/redis/mounted-etc/redis.conf
      - /path/to/redis-persistence:/drycc/redis/data
  ...

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

Overriding configuration

Instead of providing a custom redis.conf, you may also choose to provide only settings you wish to override. The image will look for /opt/drycc/redis/mounted-etc/overrides.conf. This will be ignored if custom redis.conf is provided.

$ docker run --name redis \
    -e ALLOW_EMPTY_PASSWORD=yes \
    -v /path/to/overrides.conf:/opt/drycc/redis/mounted-etc/overrides.conf \
    quay.io/drycc-addons/redis:6.2

Alternatively, modify the docker-compose.yml file present in this repository:

services:
  redis:
  ...
    volumes:
      - /path/to/overrides.conf:/opt/drycc/redis/mounted-etc/overrides.conf
  ...

Logging

The Bitnami Redis(TM) Docker image sends the container logs to the stdout. To view the logs:

$ docker logs redis

or using Docker Compose:

$ docker-compose logs redis

You can configure the containers logging driver using the --log-driver option if you wish to consume the container logs differently. In the default configuration docker uses the json-file driver.

Maintenance

Upgrade this image

Bitnami provides up-to-date versions of Redis(TM), including security patches, soon after they are made upstream. We recommend that you follow these steps to upgrade your container.

Step 1: Get the updated image

$ docker pull quay.io/drycc-addons/redis:6.2

or if you're using Docker Compose, update the value of the image property to quay.io/drycc-addons/redis:6.2.

Step 2: Stop and backup the currently running container

Stop the currently running container using the command

$ docker stop redis

or using Docker Compose:

$ docker-compose stop redis

Next, take a snapshot of the persistent volume /path/to/redis-persistence using:

$ rsync -a /path/to/redis-persistence /path/to/redis-persistence.bkp.$(date +%Y%m%d-%H.%M.%S)

Step 3: Remove the currently running container

$ docker rm -v redis

or using Docker Compose:

$ docker-compose rm -v redis

Step 4: Run the new image

Re-create your container from the new image.

$ docker run --name redis quay.io/drycc-addons/redis:6.2

or using Docker Compose:

$ docker-compose up redis

Contributing

We'd love for you to contribute to this container. You can request new features by creating an issue, or submit 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 include the following information in your issue:

Host OS and version
Docker version (docker version)
Output of docker info
Version of this container
The command you used to run the container, and any relevant output you saw (masking any sensitive information)

Name		Name	Last commit message	Last commit date
Latest commit History 4 Commits
.woodpecker		.woodpecker
6.2/debian		6.2/debian
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE.md		LICENSE.md
Makefile		Makefile
README.md		README.md
docker-compose-replicaset.yml		docker-compose-replicaset.yml
docker-compose.yml		docker-compose.yml
versioning.mk		versioning.mk

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Redis™ packaged by Bitnami

What is Redis™?

TL;DR

Docker Compose

Get this image

Persisting your database

Connecting to other containers

Using the Command Line

Step 1: Create a network

Step 2: Launch the Redis(TM) server instance

Step 3: Launch your Redis(TM) client instance

Using Docker Compose

Configuration

Disabling Redis(TM) commands

Passing extra command-line flags to redis-server startup

Setting the server password on first run

Allowing empty passwords

Disabling AOF persistence

Enabling Access Control List

Setting up a standalone instance

Setting up replication

Step 1: Create the replication master

Step 2: Create the replica node

Securing Redis(TM) traffic

Configuration file

Overriding configuration

Logging

Maintenance

Upgrade this image

Step 1: Get the updated image

Step 2: Stop and backup the currently running container

Step 3: Remove the currently running container

Step 4: Run the new image

Contributing

Issues

About

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