1.删除机器上原有的redis2.8
关闭redis-server
killall -9 redis-server
查找redis文件所在目录
which redis
删除相关文件
rm -rf redis
rm -rf redis-proxy/
rm -rf nutcracker/
删除相关命令
rm -f /usr/local/bin/redis-*
2.下载、安装redis
wget http://download.redis.io/releases/redis-4.0.1.tar.gz
tar xzf redis-4.0.1.tar.gz
mv redis-4.0.1 /usr/local/
cd /usr/local/redis-4.0.1/
make
make test
3.配置节点（新建6个以端口号命名的目录，表示6个节点，3主3从）
cd /usr/local
mkdir cluster
cd cluster/
mkdir 7000
mkdir 7001
mkdir 7002
mkdir 7003
mkdir 7004
mkdir 7005
在上面新建的每个目录下新建redis.conf文件，并写入以下内容：
port 7000
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes
protected-mode no
vim 7000/redis.conf
vim 7001/redis.conf
vim 7002/redis.conf
vim 7003/redis.conf
vim 7004/redis.conf
vim 7005/redis.conf
为了方便使用把redis-server文件复制到/usr/local/cluster目录下
cp /usr/local/redis-4.0.1/src/redis-server /usr/local/cluster
进入每个节点的目录，并用对应的配置文件启动redis
cd /usr/local/cluster/7000
../redis-server ./redis.conf &
先测试一下是否启动成功过，
/usr/local/redis-4.0.1/src/redis-cli -p 7000
如果能进去redis命令行表示启动成功，再去启动其他端口
cd /usr/local/cluster/7001
../redis-server ./redis.conf &
cd /usr/local/cluster/7002
../redis-server ./redis.conf &
cd /usr/local/cluster/7003
../redis-server ./redis.conf &
cd /usr/local/cluster/7004
../redis-server ./redis.conf &
cd /usr/local/cluster/7005
../redis-server ./redis.conf &
接下来启动cluster
cd /usr/local/redis-4.0.1/src/
./redis-trib.rb create --replicas 1 172.16.180.226:7000 172.16.180.226:7001 172.16.180.226:7002 172.16.180.227:7003 172.16.180.227:7004 172.16.180.227:7005
4.常见错误及解决方法
如果系统上各种依赖比较齐全的话，这时就能启动成功了，通常还可能遇到以下错误
错误1：
root@localhost src]# ./redis-trib.rb create --replicas 1 172.16.180.226:7000 172.16.180.226:7001 172.16.180.226:7002 172.16.180.227:7003 172.16.180.227:7004 172.16.180.227:7005
/usr/bin/env: ruby: No such file or directory
解决方案：
yum install ruby
错误2：
[root@localhost src]# ./redis-trib.rb create --replicas 1 172.16.180.226:7000 172.16.180.226:7001 172.16.180.226:7002 172.16.180.227:7003 172.16.180.227:7004 172.16.180.227:7005
./redis-trib.rb:24:in `require': no such file to load -- rubygems (LoadError)
from ./redis-trib.rb:24
解决方案：
yum install rubygems
错误3：
[root@localhost src]# ./redis-trib.rb creat --replicas 1 172.16.180.226:7000 172.16.180.226:7001 172.16.180.226:7002 172.16.180.227:7003 172.16.180.227:7004 172.16.180.227:7005
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- redis (LoadError)
from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from ./redis-trib.rb:25
解决方案：
gem install redis
yum install ruby
yum install rubygems
gem install redis
安装完以上各种依赖之后，再次执行以下命令即可成功启动cluster
./redis-trib.rb create --replicas 1 172.16.180.226:7000 172.16.180.226:7001 172.16.180.226:7002 172.16.180.227:7003 172.16.180.227:7004 172.16.180.227:7005
5.测试cluster集群是否能正常使用
/usr/local/src/redis-cli -c -h 172.16.180.226 -p 7000
上面的命令如果缺少了“-c”会出现以下错误。
6.编写重启cluster的shell脚本
vim restart-cluster.sh
写入以下内容：
#!/bin/sh
killall -9 redis-server
#删掉以前运行的节点留下的配置信息
find /usr/local/cluster/ -name "appendonly.aof"|xargs rm -f;
find /usr/local/cluster/ -name "nodes.conf"|xargs rm -f;
find /usr/local/cluster/ -name "dump.rdb"|xargs rm -f;
#重新启动redis
cd /usr/local/cluster/7000
../redis-server ./redis.conf &
cd /usr/local/cluster/7001
../redis-server ./redis.conf &
cd /usr/local/cluster/7002
../redis-server ./redis.conf &
cd /usr/local/cluster/7003
../redis-server ./redis.conf &
cd /usr/local/cluster/7004
../redis-server ./redis.conf &
cd /usr/local/cluster/7005
../redis-server ./redis.conf &
cd /usr/local/redis-4.0.1/src/
#重新创建cluster集群
./redis-trib.rb create --replicas 1 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005
shell文件保存之后需要赋予可执行权限。
chmod +x restart-cluster.sh
使用脚本重启
./restart-cluster.sh
查看是否重启成功
src/redis-cli -c -p 7000
本文参考了以下资料：
http://www.redis.cn/download.html
http://www.redis.cn/topics/cluster-tutorial.html
http://www.oschina.net/question/1259683_2133954