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Basic failover for local Redis instances with Keepalived
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README.md
keepalived.conf
redis-mdb.conf
redis.sh

README.md

Usage Options:

  • -m promote the redis-server to MASTER
  • -s promote the redis-server to SLAVE
  • -k start the redis-server and promote it to MASTER

Tested:

  • Redis 2.2.12
  • Keepalived 1.1.20

Redis Setup:

useradd -m -U redis
chmod 750 /home/redis
cd /home/redis
sudo -u redis git clone https://github.com/antirez/redis.git redis.git
cd redis.git
git checkout 2.2.12
sudo make

Configurations:

  • MASTER/SLAVE config: /home/redis/redis-mdb.conf (runs on port 6379)

How it works:

  • Keepalived runs on the Redis MASTER and SLAVE servers
  • The Redis MASTER binds the IP 172.16.0.180
  • The Redis SLAVE connects to a Master server which has the IP 172.16.0.180
  • Keepalived handles checking and runs a script if a server is online or offline
  • This script will handle starting Redis promoting it to MASTER or SLAVE

Note:

This has NOT been tested in a production environment, use at your own risk

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