# What is Redis?
Redis is an open-source, networked, in-memory, key-value data store with optional durability. It is written in ANSI C. The development of Redis has been sponsored by Pivotal since May 2013; before that, it was sponsored by VMware. According to the monthly ranking by DB-Engines.com, Redis is the most popular key-value store. The name Redis means REmote DIctionary Server.

> [wikipedia.org/wiki/Redis](https://en.wikipedia.org/wiki/Redis)

# How to use this image

## start a redis instance
    docker run --name some-redis -d redis

This image includes `EXPOSE 6379` (the redis port), so standard container linking will make it automatically available to the linked containers (as the following examples illustrate).

## start with persistent storage

    docker run --name some-redis -d redis redis-server --appendonly yes

If persistence is enabled, data is stored in the `VOLUME /data`, which can be used with `--volumes-from some-volume-container` or `-v /docker/host/dir:/data` (see [docs.docker volumes](http://docs.docker.com/userguide/dockervolumes/)).

For more about Redis Persistence, see [http://redis.io/topics/persistence](http://redis.io/topics/persistence).

## connect to it from an application
    docker run --name some-app --link some-redis:redis -d application-that-uses-redis

## ... or via `redis-cli`
    docker run -it --link some-redis:redis --rm redis sh -c 'exec redis-cli -h "$REDIS_PORT_6379_TCP_ADDR" -p "$REDIS_PORT_6379_TCP_PORT"'

## Additionally, If you want to use your own redis.conf ...

You can create your own Dockerfile that adds a redis.conf from the context into /data/, like so.

    FROM redis
    redis.conf /data/
    CMD [ "redis-server", "/data/redis.conf" ]

Alternatively, you can specify something along the same lines with `docker run` options.

    ocker run --volumes-from datacontainer --name myredis redis

Using this method means that there is no need for you to have a Dockerfile for your redis container.



# User Feedback

## Issues

If you have any questions about the image, please contact us through a [GitHub issue](https://github.com/docker-library/redis/issues) or in the IRC channel `#docker-library` on [Freenode](https://freenode.net).

## Contributing

If you want to contribute new features or updates, we are always thrilled to receive pull requests, and do our best to process them as fast as possible.

We recommend discussing your plans through a [GitHub issue](https://github.com/docker-library/redis/issues) before starting to code - especially for more ambitious contributions. This gives other contributors a chance to point you in the right direction, give feedback on your design, and maybe point out if someone else is working on the same thing.