1 基本信息
3台服务器(CentOS7.3)
192.168.1.101 node101
192.168.1.102 node102
192.168.1.103 node103
2 单机 安装 Redis
安装依赖
配置yum源，详见: [Linux]CentOS7搭建/配置：YUM仓库/源[本地源/Web源(Apache HTTP(D))/自建源仓库] - 博客园
yum -y install gcc gcc-c++ net-tools tcl
下载 Redis安装包
下载redis安装包到/opt/目录下 + 安装到/usr/local/下
cd /opt
wget http://download.redis.io/releases/redis-5.0.5.tar.gz
cp /opt/redis-5.0.5.tar.gz /usr/local
tar -zxvf /usr/local/redis-5.0.5.tar.gz -C /usr/local/ #解压后的存放目录: /usr/local/redis-5.0.5/
-C ： 指定解压后存放的路径
编译&安装
[编译]
cd /usr/local/redis-5.0.5/deps
make hiredis jemalloc linenoise lua geohash-int
cd /usr/local/redis-5.0.5
make && make install
注: make #等待编译完成即可，未报错即进行下一步
注: make install #安装，执行make install的时候会将src下面的几个命令复制到/usr/local/bin/下
[安装]
cd /usr/local/redis-5.0.5/utils
./install_server.sh
初步配置
redis_port=6379
设置临时变量，以便后续调用其值
cp /usr/local/redis-5.0.5/redis.conf /etc/redis/redis_port.conf
sed -i "s/127.0.0.1/0.0.0.0/g" /etc/redis/$redis_port.conf
注： sed 's/要被取代的字串/新的字串/g' ； bind 0.0.0.0 : 允许与任何主机通信
vi /etc/redis/redis_port.conf
bind 192.168.0.101/102/103 # 本机ip
daemonize yes # 后台运行
cluster-enabled yes # 启用集群
service redis_$redis_port restart
安装压缩包存放路径: /opt/redis-5.0.5.tar.gz
安装路径 : /usr/local/redis-5.0.5/*
Config file : /etc/redis/6379.conf
Log file : /var/log/redis_6379.log
Data dir : /var/lib/redis/6379
Executable : /usr/local/bin/redis-server
Cli Executable : /usr/local/bin/redis-cli
Copied /tmp/6379.conf => /etc/init.d/redis_6379
运行redis
因为redis-server命令在/usr/local/bin目录里面，而该目录又配置在PATH中，所以可以像执行ls、mkdir等命令的方式去执行redis-cli或者redis-server等命令。
redis-server # 在任意目录下运行 (方式1)
/usr/local/redis-5.0.5/src/redis-server # 在redis目录下运行 (方式2)
redis-server /etc/redis/6379.conf # 指定redis.conf文件启动 (方式3)
service redis_6379 restart
2 配置Redis集群
3台机器均需如下操作
配置防火墙
systemctl start firewalld
firewall-cmd --permanent --zone=public --add-port=6379/tcp
ss -lntp
"master"
关闭端口
firewall-cmd --permanent --zone=public --remove-port=6379/tcp
firewall-cmd --permanent --zone=public --add-port=16379/tcp
Redis集群通信时用
systemctl restart firewalld
安装集群相关依赖
yum -y install ruby rubygems
gem install redis
安装Redis客户端 for ruby
[若执行"gem install redis"出现如下信息时，可通过如下4步来尝试解决]
ERROR: Could not find a valid gem 'redis' (>= 0), here is why:Unable to download data from https://rubygems.org/ - no such name (https://rubygems.org/latest_specs.4.8.gz)
1 下载、上传到/opt/dataeye/redis/redis-3.3.0.gem (下载地址： http://rubygems.org/downloads/redis-3.3.0.gem)
2 cd /opt/dataeye/redis/
3 yum -y install zlib-devel
gem的依赖
4 gem install redis-3.3.0.gem
创建集群
[推荐]
redis-cli --cluster create 192.168.1.101:6379 192.168.1.102:6379 192.168.1.103:6379
[不被推荐/已废弃]X
cd /usr/local/redis-5.0.5/src/
./redis-trib.rb create 192.168.1.101:6379 192.168.1.102:6379 192.168.1.103:6379
3 验证集群可用性
3.1 查看集群节点信息及状态
cluster info
cluster nodes
3.2 数据同步一致性验证
[node102]
[root@node102 src]# redis-cli -h 192.168.1.101 -c
192.168.1.101:6379> set name sdc_test
OK
192.168.1.101:6379> get name
"sdc_test"
192.168.1.101:6379> exit
[node101]
[root@node101 src]# redis-cli -h 192.168.1.102 -c
192.168.1.102:6379> get name
-> Redirected to slot [5798] located at 192.168.1.101:6379
"sdc_test"
192.168.1.101:6379> set name "sdc_test2~~~~~~~~"
-> Redirected to slot [5798] located at 192.168.1.101:6379
OK
192.168.1.101:6379> exit
[node103]
[root@node103 redis]# redis-cli -h 192.168.1.102 -c
192.168.1.102:6379> get name
-> Redirected to slot [5798] located at 192.168.1.101:6379
"sdc_test2~~~~~~~~"
192.168.1.102:6379> exit
4 参考文献
CentOS7简单几步实现Redis集群 - 简书
redis-5.0.5.tar.gz 安装 - 博客园
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