Redis is a key-value database in a similar vein to memcache but the
dataset is non-volatile. Redis additionally provides native support
for atomically manipulating and querying data structures such as lists
and sets. The dataset is stored entirely in memory and periodically
flushed to disk.
This charm supports data replication and provides both the master and the
Redis (http://redis.io) is an open source, advanced key-value cache and
store. It is often referred to as a data structure server since keys can
contain strings, hashes, lists, sets, sorted sets, bitmaps and hyperloglogs.
In order to achieve its outstanding performance, Redis works with an in-memory
dataset that can be written to disk. Redis also supports master-slave
Redis can be configured in a master or slave configuration. This charm
provides a single stand alone implementation of Redis software supporting the
master-slave relationship. Go to the Redis web pages for more information on
To deploy this charm first bootstrap your Juju environment and issue the
juju deploy redis
Expose the master if you need to contact them for some reason.
juju expose redis
Redis can be set up with master-slave replication in Juju. This allows the
Redis slave to be an exact copy of master server. A master can have multiple
To set up a master-slave scenario, deploy two services using this charm, one
for the master and one the slave server, then relate the two.
juju deploy redis redis1
juju deploy redis redis2
juju add-relation redis1:master redis2:slave
The charm provides a db relation for services wanting to connect to the Redis
service. When the relation established the following data is passed to the
To test if Redis software is functioning properly, telnet to the Redis private
ip address using port 6379. First you need to retrieve the private address of
the Redis instance, then you can use juju ssh to connect to that address,
juju ssh redis/0 telnet `juju run --unit redis/0 "unit-get private-address"` 6379
You can also install the redis-tools package apt-get install redis-tools
and connect using the Redis client command:
apt-get install redis-tools
From there you can issue Redis commands to test
that Redis is working as intended.
To create a development environment, obtain a copy of the sources, run
make sysdeps to install the required system packages and then make to set
up the development virtual environment. At this point, it is possible to run
unit and functional tests, including lint checks, by executing make check.
Run make deploy to deploy the local copy of the charm for development
purposes on your already bootstrapped environment.
Use make help for further information about available make targets.