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lb-docker-redis

Base docker image to run a Redis server

Usage

To create the image lastbackend/redis, execute the following command on the lb-docker-redis folder:

docker build -t lastbackend/redis .

Running the Redis server

Run the following command to start Redis:

docker run -d -p 6379:6379 lastbackend/redis

The first time that you run your container, a new random password will be set.
To get the password, check the logs of the container by running:

docker logs <CONTAINER_ID>

You will see an output like the following:

    ------------------------------- REDIS ------------------------------
      +-++-+ redis-cli -a sJZmFTlDejb9sjiDstPHKezJ -h <host> -p <port>
      | LB | 
      +-++-+ Please remember to change the above password!
    --------------------------------------------------------------------

In this case, sJZmFTlDejb9sjiDstPHKezJ is the password set.
You can then connect to Redis:

redis-cli -a sJZmFTlDejb9sjiDstPHKezJ

Setting a specific password

If you want to use a preset password instead of a random generated one, you can
set the environment variable PASS to your specific password when running the container:

docker run -d -p 6379:6379 -e PASS="mypass" lastbackend/redis

You can now test your deployment:

redis-cli -a mypass

If you want to disable password authentication, you can set PASSWORD to **None**:

docker run -d -p 6379:6379 -e PASS="**None**" lastbackend/redis

Configuring Redis

If you want to pass in any configuration variable to redis, set it as an environment variable with a REDIS_ prefix.
For example, if you want to set tcp-keepalive 60, execute the following:

docker run -d -p 6379:6379 -e REDIS_TCP_KEEPALIVE=60 lastbackend/redis

For a full list of configuration options, check this commented redis.conf file

Configuring Redis as a LRU cache

In order to run Redis as a cache that will delete older entries when the memory fills up
provide the following additional environment variables:

docker run -d -p 6379:6379 -e REDIS_MAXMEMORY_POLICY="allkeys-lru" -e REDIS_MAXMEMORY="256mb" lastbackend/redis

More info at redis.io

Configuring Redis to use AOF

If you want Redis to store data in a volume to prevent data from disappearing should you restart the container,
set the following environment variables:

docker run -d -p 6379:6379 -e REDIS_APPENDONLY=yes -e REDIS_APPENDFSYNC=always lastbackend/redis

Please note that this will impact performance. For a more lightweight persistence by saving every second
instead of every instruction, use REDIS_APPENDFSYNC=everysec instead.
More info at redis.io

by http://www.lastbackend.com

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