Installation: Redis

Notes

Redis is the key/value store that connects the jobs generated by the HydraDAM code with the resque workers that execute those jobs.

Steps

1. Change to the install directory by entering the command mkdir -p /opt/install && cd /opt/install in the terminal window.

2. Download redis by entering the command wget http://download.redis.io/redis-stable.tar.gz.

3. Untar redis by entering the command tar xvzf redis-stable.tar.gz.

4. Change to the redis directory by entering the command cd redis-stable/.

5. Compile redis from source by entering the command make.

   The output for Steps 1-5 should look similar to this (with the ... indicating system generated code that has been intentionally left out of these instructions):
   [your_username@ip install]$ mkdir -p /opt/install && cd /opt/install
   [your_username@ip install]$ wget http://download.redis.io/redis-stable.tar.gz
   --2014-02-01 02:25:14-- http://download.redis.io/redis-stable.tar.gz
   Resolving download.redis.io... 109.74.203.151
   Connecting to download.redis.io|109.74.203.151|:80... connected.
   HTTP request sent, awaiting response... 200 OK
   Length: 1071670 (1.0M) [application/x-gzip]
   Saving to: “redis-stable.tar.gz”

   100%[======================================>] 1,071,670 1.22M/s in 0.8s

   2014-02-01 02:25:15 (1.22 MB/s) - “redis-stable.tar.gz” saved [1071670/1071670]

   [your_username@ip install]$ tar xvzf redis-stable.tar.gz
   redis-stable/
   redis-stable/INSTALL
   redis-stable/sentinel.conf
   ...
   [your_username@ip install]$ cd redis-stable/
   [your_username@ip redis-stable]$ make
   cd src && make all
   make[1]: Entering directory `/opt/install/redis-stable/src'
   ...
   LINK redis-check-dump
   CC redis-check-aof.o
   LINK redis-check-aof

   Hint: To run 'make test' is a good idea ;)

   make[1]: Leaving directory `/opt/install/redis-stable/src'

6. Test your redis installation. Make sure you are in the redis directory and then enter the command make test. You should see a lot of output, with the line "All tests passed without errors!" near the end.

7. To configure redis, move the server and client by entering the command

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

8. Make the necessary directories by entering the command sudo mkdir /etc/redis /var/redis /var/redis/6379.

9. Copy the init script by entering the command
   Ubuntu: sudo cp utils/redis_init_script /etc/init.d/redis_6379
   CentOS: sudo cp utils/redis_init_script /etc/rc.d/init.d/redis_6379

10. Copy the conf file by entering the command sudo cp redis.conf /etc/redis/6379.conf.

11. Edit the conf file to daemonize, set the pidfile, configure logging, and set the home directory by entering the commands:

sudo sed 's/^(daemonize\ )no.$/\1yes/' -i /etc/redis/6379.conf sudo sed 's#^(pidfile\ /var/run/).$#\1redis_6379.pid#' -i /etc/redis/6379.conf sudo sed 's/^(loglevel\ )verbose.$/\1notice/' -i /etc/redis/6379.conf sudo sed 's#^(dir\ ).$#\1/var/redis/6379#' -i /etc/redis/6379.conf ```

1. Start redis by entering the command sudo service redis_6379 start.

2. (CentOS only) Add redis to chkconfig so it starts automatically on start/reboot. To do this edit /etc/rc.d/init.d/redis_6379. Immediately after the initial comments, add

added for chkconfig compliance

chkconfig: 2345 95 20

description: redis_6379

Starts the redis server

processname: redis_6379

**Do not uncomment these lines.**  
 
 1. Save the file  
 1. Add redis to chkconfig by entering the command `sudo chkconfig --add redis_6379`.

# Verification Steps
1. Enter the command `redis-cli ping`. The output should be _PONG_. 
1. Enter the command `redis-cli save`. The output should be _OK_.

# Next Step
Proceed to [[Install ffmpeg|Installation:-ffmpeg]] or return to the [[Overview|Production-Installation:-Overview]] page.