esdc redis

Redis

Redis is an advanced key-value store.
http://redis.io/

Note: This guide is made for a development environment based on CentOS 7.

Install

We will use the remi repository and install the newest version (3.2):

yum install http://rpms.famillecollet.com/enterprise/remi-release-7.rpm

vim /etc/yum.repos.d/remi.repo  # Enable the [remi] repo

yum install redis

Configure

REDISPASS="S3cr3tP4ssw0rd"
vim /etc/redis.conf

1. Comment out bind option
2. Set requirepass ${REDISPASS}
3. Comment out save lines (in SNAPSHOTTING section)

Edit iptables to add line for opening redis port

vim /etc/sysconfig/iptables

Add following line:

-A INPUT -m state --state NEW -m tcp -p tcp --dport 6379 -j ACCEPT

Then restart iptables

systemctl restart iptables  # allow port 6379 for compute nodes 

Run

systemctl start redis
systemctl enable redis

Use

• Used by django for caching:

  from django.core.cache import cache, caches
  
  # django cache wrapper
  cache.set(key, value, timeout=0)
  cache.get(key)
  cache.delete(key)
  
  # redis client directly
  redis = caches['redis'].master_client
  redis.keys()

• Also used by Celery as a result backend:

  from que.erigonesd import cq
  
  redis = cq.backed.client
  redis.keys()