centos上搭建redis集群
简介：Redis 集群是一个可以在多个 Redis 节点之间进行数据共享的设施（installation）。
集群的理解
为何使用集群：解决单机故障，和单台服务器性能瓶颈的问题
提升系统负载，引入集群也引入了集群间节点通信和数据同步的一致性问题，和系统高可用的问题。
1.安装环境依赖
yum -y install gcc automake autoconf libtool make
yum install gcc-c++
2.下载redis软件包，解压并安装
cd /usr/local/software
wget http://download.redis.io/releases/redis-5.0.3.tar.gz
tar xzf redis-5.0.3.tar.gz
cd redis-5.0.3
make && make install
3.建立软件以及节点运行目录，复制配置文件
cd /usr/local
mkdir redis-cluster
cd redis-cluster
mkdir redis-node-7000 redis-node-7001 redis-node-7002 redis-node-7003 redis-node-7004 redis-node-7005 redis-node-7006
redis-node-7007
cd redis-node1
mkdir logs data
cd /usr/local/software/redis-5.0.3
cp redis.conf /usr/local/redis-cluster/redis-node-7000
cp redis.conf /usr/local/redis-cluster/redis-node-7001
cp redis.conf /usr/local/redis-cluster/redis-node-7002
cp redis.conf /usr/local/redis-cluster/redis-node-7003
cp redis.conf /usr/local/redis-cluster/redis-node-7004
cp redis.conf /usr/local/redis-cluster/redis-node-7005
cp redis.conf /usr/local/redis-cluster/redis-node-7006
cp redis.conf /usr/local/redis-cluster/redis-node-7007
cd src
cp redis-cli redis-server /usr/local/redis-cluster/redis-node-7000
cp redis-cli redis-server /usr/local/redis-cluster/redis-node-7001
cp redis-cli redis-server /usr/local/redis-cluster/redis-node-7002
cp redis-cli redis-server /usr/local/redis-cluster/redis-node-7003
cp redis-cli redis-server /usr/local/redis-cluster/redis-node-7004
cp redis-cli redis-server /usr/local/redis-cluster/redis-node-7005
cp redis-cli redis-server /usr/local/redis-cluster/redis-node-7006
cp redis-cli redis-server /usr/local/redis-cluster/redis-node-7007
4.修改配置文件
cd /usr/local/redis-cluster/redis-node-7000
vi redis.conf
--文件内容如下
port 7000 //端口7000,7002,7003..
bind 本机ip //默认ip为127.0.0.1 需要改为其他节点机器可访问的ip 否则创建集群时无法访问对应的端口，无法创建集群
daemonize yes //redis后台运行
pidfile /usr/local/redis-cluster/redis-node-7000/redis_7000.pid //pidfile文件对应7000,7001,7002,7003,7004,7005,7006,7007
cluster-enabled yes //开启集群 把注释#去掉
cluster-config-file nodes_7000.conf //集群的配置 配置文件首次启动自动生成 7000,7001,7002,7003..
cluster-node-timeout 15000 //请求超时 默认15秒，可自行设置
appendonly yes //aof日志开启 有需要就开启，它会每次写操作都记录一条日志
logfile "/usr/local/redis-cluster/redis-node-7000/logs/redis_7000.log" //配置日志文件路径 dir "/usr/local/redis-cluster/redis-5.0.3-node/data" //配置数据文件存放路径
dir "/usr/local/redis-cluster/redis-node-7000/data"
5.启动各个节点
cd /usr/local/redis-cluster/redis-node-7000
redis-server redis.conf
查看启动情况
ps -ef | grep redis
6.初始化集群（节点列表顺序用于确定主从角色，先主节点之后是从节点）
cd /usr/local/redis-cluster
redis-cli --cluster create --cluster-replicas 1 192.168.50.230:7000 192.168.50.230:7001 192.168.50.230:7002 192.168.50.230:7003 192.168.50.230:7004 192.168.50.230:7005 192.168.50.230:7006 192.168.50.230:7007
查看集群信息
redis-cli -c -h 192.168.50.230 -p 7000
cluster info
检查集群信息
redis-cli --cluster check 192.168.50.230:7000
参考资料