一、环境准备

192.168.5.100 redis-01

192.168.5.101 redis-02

192.168.5.102 redis-03

关闭防火墙、能够通网

 二、安装redis

[root@localhost ~]# wget http://download.redis.io/releases/redis-5.0.8.tar.gz
[root@localhost ~]# tar xf redis-5.0.8.tar.gz -C /usr/local/
[root@localhost ~]# yum -y install gcc gcc-c++
[root@localhost ~]# cd /usr/local/redis-5.0.8
[root@localhost ~]# make && make install

确认能启动、退出

[root@localhost redis-5.0.8]# redis-server --daemonize yes
12523:C 15 Nov 2023 10:02:04.043 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
12523:C 15 Nov 2023 10:02:04.043 # Redis version=5.0.8, bits=64, commit=00000000, modified=0, pid=12523, just started
12523:C 15 Nov 2023 10:02:04.043 # Configuration loaded
[root@localhost redis-5.0.8]# ps -ef |grep redis
root      12508  12476  0 09:59 pts/1    00:00:00 redis-cli
root      12524      1  0 10:02 ?        00:00:00 redis-server *:6379
root      12529   8205  0 10:02 pts/0    00:00:00 grep --color=auto redis
[root@localhost redis-5.0.8]# redis-cli ping
PONG[root@localhost redis-5.0.8]# pkill redis-server
[root@localhost redis-5.0.8]# redis-cli ping
Could not connect to Redis at 127.0.0.1:6379: Connection refused

三、开始搭建集群

1.首先创建6个空文件

[root@redis-01 ~]# mkdir -p /usr/local/redis-cluster/9001
[root@redis-01 ~]# mkdir -p /usr/local/redis-cluster/9002
[root@redis-02 ~]# mkdir -p /usr/local/redis-cluster/9003
[root@redis-02 ~]# mkdir -p /usr/local/redis-cluster/9004
[root@redis-03 redis-5.0.8]# mkdir -p /usr/local/redis-cluster/9005
[root@redis-03 redis-5.0.8]# mkdir -p /usr/local/redis-cluster/9006

2.copy  redis.conf redis-server

[root@redis-01 redis-5.0.8]# cp redis.conf /usr/local/redis-cluster/9001
[root@redis-01 redis-5.0.8]# cp redis.conf /usr/local/redis-cluster/9002
[root@redis-02 redis-5.0.8]# cp redis.conf /usr/local/redis-cluster/9003
[root@redis-02 redis-5.0.8]# cp redis.conf /usr/local/redis-cluster/9004
[root@redis-03 redis-5.0.8]# cp redis.conf /usr/local/redis-cluster/9005
[root@redis-03 redis-5.0.8]# cp redis.conf /usr/local/redis-cluster/9006[root@redis-01 src]# cp redis-server /usr/local/redis-cluster/9001/
[root@redis-01 src]# cp redis-server /usr/local/redis-cluster/9002/
[root@redis-02 src]# cp redis-server /usr/local/redis-cluster/9003/
[root@redis-02 src]# cp redis-server /usr/local/redis-cluster/9004/
[root@redis-03 src]# cp redis-server /usr/local/redis-cluster/9005/
[root@redis-03 src]# cp redis-server /usr/local/redis-cluster/9006/

3.修改redis.conf

在vim里你可以使用以下命令查找并删除注释行：:g/^#/d

1）port 9001 //设置端口号2）dir /usr/local/redis_cluster/9001/ //数据存放位置，必须要指定3）cluster-enabled yes //启动集群模式4）cluster-config-file nodes-9001.conf //集群节点信息文件6）cluster-node-timeout 5000bind 127.0.0.1 //去掉bind绑定访问ip信息protected-mode no //关闭保护模式9）appendonly yes //开启AOF模式,默认的持久化上RDB[root@redis-01 redis-cluster]# cp 9001/redis.conf 9002/redis.conf 
cp：是否覆盖"9002/redis.conf"？ y
[root@redis-01 redis-cluster]# scp 9001/redis.conf 192.168.5.101:/usr/local/redis-cluster/9003/redis.conf 100% 1654     2.4MB/s   00:00    
[root@redis-01 redis-cluster]# scp 9001/redis.conf 192.168.5.101:/usr/local/redis-cluster/9004/redis.conf 

4、启动redis服务

[root@redis-01 redis-cluster]# redis-server /usr/local/redis-cluster/9001/redis.conf --daemonize yes
12684:C 15 Nov 2023 10:33:53.480 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
12684:C 15 Nov 2023 10:33:53.480 # Redis version=5.0.8, bits=64, commit=00000000, modified=0, pid=12684, just started
12684:C 15 Nov 2023 10:33:53.480 # Configuration loaded
[root@redis-01 redis-cluster]# redis-cli ping[root@redis-01 redis-cluster]# redis-cli -h 127.0.0.1 -p 9001 ping
PONG

5.创建redis集群(5.0版本以后直接使用redis-cli)

//-a *** 密码 如果redis.conf中配置了密码创建集群时需要添加

//--cluster-replicas 1 从节点个数

四、不重启redis集群修改最大内存设置

192.168.5.100:9001> CONFIG GET maxmemory
1) "maxmemory"
2) "0"[root@redis-01 9001]# redis-cli -h 192.168.5.100 -p 9001 config set maxmemory 4GB
OK
[root@redis-01 9001]# redis-cli -h 192.168.5.100 -p 9001 config rewrite
OK[root@redis-01 9001]# redis-cli -h 192.168.5.100 -p 9001
192.168.5.100:9001> CONFIG GET maxmemory
1) "maxmemory"
2) "4294967296"