Set up Redis

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Set up Redis

Installing Redis

In Ubuntu, you can run the following command to install Redis.

wget http://download.redis.io/redis-stable.tar.gz
tar xvzf redis-stable.tar.gz
cd redis-stable
make

It is a good idea to copy both the Redis server and the command line interface in proper places, either manually using the following commands:

sudo cp src/redis-server /usr/local/bin/
sudo cp src/redis-cli /usr/local/bin/

The simplest way to start the Redis server is just executing the redis-server binary without any argument.

$ redis-server
[28550] 01 Aug 19:29:28 # Warning: no config file specified, using the default config. In order to specify a config file use 'redis-server /path/to/redis.conf'
[28550] 01 Aug 19:29:28 * Server started, Redis version 2.2.12
[28550] 01 Aug 19:29:28 * The server is now ready to accept connections on port 6379
... more logs ...

Check if Redis is working

$ redis-cli ping
PONG

Stop Redis

$ redis-cli shutdown

Install Redis using an init script

A proper install using an init script is strongly suggested. The following instructions can be used to perform a proper installation using the init script shipped with Redis 2.4 in a Debian or Ubuntu based distribution.

We assume you already copied redis-server and redis-cli executables under /usr/local/bin.

Create a directory where to store your Redis config files and your data:

sudo mkdir /etc/redis
sudo mkdir /var/redis

Copy the init script that you'll find in the Redis distribution under the utils directory into /etc/init.d. We suggest calling it with the name of the port where you are running this instance of Redis. For example:

sudo cp utils/redis_init_script /etc/init.d/redis_6379

Copy the template configuration file you'll find in the root directory of the Redis distribution into /etc/redis/ using the port number as name, for instance:

sudo cp redis.conf /etc/redis/6379.conf

Create a directory inside /var/redis that will work as data and working directory for this Redis instance:

sudo mkdir /var/redis/6379

Edit the configuration file, making sure to perform the following changes:

  • Set daemonize to yes (by default it is set to no).
  • Set the pidfile to /var/run/redis_6379.pid (modify the port if needed).
  • Change the port accordingly. In our example it is not needed as the default port is already 6379.
  • Set your preferred loglevel.
  • Set the logfile to /var/log/redis_6379.log
  • Set the dir to /var/redis/6379 (very important step!)

Finally add the new Redis init script to all the default runlevels using the following command:

sudo update-rc.d redis_6379 defaults
> insserv: warning: script 'K01redis_6379' missing LSB tags and overrides
> insserv: warning: script 'redis_6379' missing LSB tags and overrides

The command above returns 2 warning messages. But not sure how did they happen.

You are done! Now you can try running your instance with:

sudo /etc/init.d/redis_6379 start

Make sure that everything is working as expected:

  • Try pinging your instance with redis-cli.
  • Do a test save with redis-cli save and check that the dump file is correctly stored into /var/redis/6379/ (you should find a file called dump.rdb).
  • Check that your Redis instance is correctly logging in the log file.
  • If it's a new machine where you can try it without problems make sure that after a reboot everything is still working.

 

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