What is needed to build a redis cluster?

The Redis cluster requires at least 3 nodes, because the voting fault tolerance mechanism requires more than half of the nodes to think that a node is down before the node is down, so 2 nodes cannot form a cluster.

There are three nodes in the cluster, and each node has one master and one backup. Requires 6 virtual machines. Build a pseudo-distributed cluster and use 6 redis instances to simulate.

1. Install ruby ​​environment (Recommended learning: Redis video tutorial)

yum install ruby//ruby运行环境
yum install rubygems//ruby包管理器将redis-3.0.0.gem上传到服务器(redis-trib.rb运行需要依赖的包)
gem installe redis-3.0.0.gem(安装该依赖包)

2. Build a cluster

(1)Copy bin

mkdir redis-cluster cd redis
cp -r bin ../redis-cluster/redis01 //拷贝

(2)Modify the configuration file

cd ../redis-cluster/redis01/rm -f dump.rdb (删除快照文件)
vim redis.conf

Modification:

port 7001cluster-enabled yes

(3) Create six nodes

　　cp -r redis01/ redis02(一直改到6)vim redis02/redis.conf(分别改端口号)

(4)Copy the cluster script to the cluster directory

　　cd redis-3.0.0/src
　　cp *.rb /usr/local/redis-cluster/

(5) Run 6 redis instances

　　vim startall.shcd redis01
　　./redis-server redis.confcd ..cd redis02
　　./redis-server redis.confcd ..cd redis03
　　./redis-server redis.confcd ..cd redis04
　　./redis-server redis.confcd ..cd redis05
　　./redis-server redis.confcd ..cd redis06
　　./redis-server redis.confcd ..
　　./startall.sh

(6) Create a cluster

./redis-trib.rb create --replicas 1 192.168.25.153:7001 192.168.25.153:7002 192.168.25.153:7003192.168.25.153:7004 192.168.25.153:7005 192.168.25.153:7006

For more Redis related technical articles, please visit the Redis Getting Started Tutorial column to learn!

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