Installing Redis with Docker

Installing Redis with Docker

If you want a simple setup for learning or experimentation, using Docker to install Redis is recommended.

Downloading the Redis Docker image

Run the following command to download Redis Docker. This example uses the alpine version.

If you want another version tag, refer to https://hub.docker.com/_/redis/tags.

% docker pull redis:alpine

After downloading, check the image and you can see the list as follows.

% docker images
REPOSITORY         TAG       IMAGE ID       CREATED        SIZE
redis              alpine    a4cf5af74f5e   2 days ago     30.4MB

Creating and running a Redis Docker container

Run the following command.

% docker run -d -p 6379:6379 --name=redis redis:alpine 

• -p: specify the port to expose on the host
• --name: specify the container name

After running it, check the running container.

% docker container ls
CONTAINER ID   IMAGE          COMMAND                  CREATED          STATUS          PORTS                    NAMES
1df277cb625c   redis:alpine   "docker-entrypoint.s…"   30 seconds ago   Up 29 seconds   0.0.0.0:6379->6379/tcp   redis

Connecting to Redis Docker

Connecting inside the Redis Docker container

Before connecting to Redis, connect inside the Docker container where Redis is installed.

% docker exec -it redis /bin/bash

If you see an error message like the following, try connecting with /bin/sh.

OCI runtime exec failed: exec failed: unable to start container process: exec: "/bin/bash": stat /bin/bash: no such file or directory: unknown

% docker exec -it redis /bin/sh

Connecting to Redis

Once connected inside the container, connect to Redis. Use the redis-cli command to connect to Redis.

/data # redis-cli
127.0.0.1:6379>

When connected, the prompt changes to IP:port> as shown above.

To check Redis information, enter info as follows.

127.0.0.1:6379> info
# Server
redis_version:7.0.10

... omitted ...

Press Ctrl+C to exit.