content.md 2.5 KB
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.
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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).
For more about Redis Persistence, see 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 redis-cli -h redis -p 6379
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
COPY redis.conf /usr/local/etc/redis/redis.conf
CMD [ "redis-server", "/usr/local/etc/redis/redis.conf" ]
Alternatively, you can specify something along the same lines with docker run options.
$ docker run -v /myredis/conf/redis.conf:/usr/local/etc/redis/redis.conf --name myredis redis redis-server /usr/local/etc/redis/redis.conf
Where /myredis/conf/ is a local directory containing your redis.conf file. Using this method means that there is no need for you to have a Dockerfile for your redis container.
32bit variant
This variant is not a 32bit image (and will not run on 32bit hardware), but includes Redis compiled as a 32bit binary, especially for users who need the decreased memory requirements associated with that. See "Using 32 bit instances" in the Redis documentation for more information.