前言：
集群是指通过添加服务器的数量，提供相同的服务，从而让如武器达到一个稳定、高效的状态。为什么要使用redis集群呢？redis集群可以强化的redis的读写能力。
下面我们就来正式学习下redis集群。
准备工作：
需要4个部件：Redis、Ruby语言运行环境、Redis的Ruby驱动redis-xxxx.gem、创建Redis集群的工具redis-trib.rb。使用redis-trib.rb工具来创建Redis集群，由于该文件是用ruby语言写的，所以需要安装Ruby开发环境，以及驱动redis-xxxx.gem。
1）下载Redis安装文件：https://github.com/MSOpenTech/redis/releases/，Redis提供msi和zip格式的下载文件，这里下载zip格式Redis-x64-3.2.100版本。
2）下载Ruby安装文件：http://dl.bintray.com/oneclick/rubyinstaller/rubyinstaller-2.2.4-x64.exe
3）下载Ruby环境下Redis的驱动：https://rubygems.org/gems/redis/versions/3.2.2，考虑到兼容性，这里下载的是3.2.2版本
注意：下载在页面右下角相关连接一项中
4）下载Redis官方提供的创建Redis集群的ruby脚本文件redis-trib.rb，路径如下：https://raw.githubusercontent.com/MSOpenTech/redis/3.0/src/redis-trib.rb
安装Redis
将下载到的Redis-x64-3.2.100.zip解压即可，为了方便使用，建议放在盘符根目录下，如：D:\Redis-Cluster\Redis-x64-3.2.100。
安装Redis，并运行3个实例(Redis集群需要至少3个以上节点，低于3个无法创建)；
通过配置文件来启动6个不同的Redis实例，由于Redis默认端口为6379，所以这里使用了6380、6381、6382、6383、6384、6385来运行6个Redis实例。
注意：
（1）为了避免不必要的错误，配置文件尽量保存为utf8格式，并且不要包含注释；
（2）配置文件中以下两种保存日志的方式(保存在文件中、保存到System Log中)请根据需求选择其中一种即可：
loglevel notice #日志的记录级别，notice是适合生产环境的 logfile "D:/Redis-Cluster/Redis-x64-3.2.100/Logs/redis6380_log.txt" #指定log的保持路径,默认是创建在Redis安装目录下，如果有子目录需要手动创建，如此处的Logs目录 syslog-enabled yes #是否使用系统日志 syslog-ident redis6380 #在系统日志的标识名
这里使用了保存在文件中的方式，所以先在Redis目录D:\Redis-Cluster\Redis-x64-3.2.100下新建Logs文件夹。
在Redis安装根目录下，创建编码格式为utf-8的配置文件：redis.6380.conf、redis.6381.conf、redis.6382.conf、redis.6383.conf、redis.6384.conf、redis.6385.conf。
redis.6380.conf、
port 6380 loglevel notice logfile "D:/Redis-Cluster/Redis-x64-3.2.100/Logs/redis6380_log.txt" appendonly yes appendfilename "appendonly.6380.aof" cluster-enabled yes cluster-config-file nodes.6380.conf cluster-node-timeout 15000 cluster-slave-validity-factor 10 cluster-migration-barrier 1 cluster-require-full-coverage yes
redis.6381.conf、
port 6381 loglevel notice logfile "D:/Redis-Cluster/Redis-x64-3.2.100/Logs/redis6381_log.txt" appendonly yes appendfilename "appendonly.6381.aof" cluster-enabled yes cluster-config-file nodes.6381.conf cluster-node-timeout 15000 cluster-slave-validity-factor 10 cluster-migration-barrier 1 cluster-require-full-coverage yes
redis.6382.conf、
port 6382 loglevel notice logfile "D:/Redis-Cluster/Redis-x64-3.2.100/Logs/redis6382_log.txt" appendonly yes appendfilename "appendonly.6382.aof" cluster-enabled yes cluster-config-file nodes.6382.conf cluster-node-timeout 15000 cluster-slave-validity-factor 10 cluster-migration-barrier 1 cluster-require-full-coverage yes
redis.6383.conf、
port 6383 loglevel notice logfile "D:/Redis-Cluster/Redis-x64-3.2.100/Logs/redis6383_log.txt" appendonly yes appendfilename "appendonly.6383.aof" cluster-enabled yes cluster-config-file nodes.6383.conf cluster-node-timeout 15000 cluster-slave-validity-factor 10 cluster-migration-barrier 1 cluster-require-full-coverage yes
redis.6384.conf、
port 6384 loglevel notice logfile "D:/Redis-Cluster/Redis-x64-3.2.100/Logs/redis6384_log.txt" appendonly yes appendfilename "appendonly.6384.aof" cluster-enabled yes cluster-config-file nodes.6384.conf cluster-node-timeout 15000 cluster-slave-validity-factor 10 cluster-migration-barrier 1 cluster-require-full-coverage yes
redis.6385.conf
port 6385 loglevel notice logfile "D:/Redis-Cluster/Redis-x64-3.2.100/Logs/redis6385_log.txt" appendonly yes appendfilename "appendonly.6385.aof" cluster-enabled yes cluster-config-file nodes.6385.conf cluster-node-timeout 15000 cluster-slave-validity-factor 10 cluster-migration-barrier 1 cluster-require-full-coverage yes
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配置解释如下：
port 6380 #端口号 loglevel notice #日志的记录级别，notice是适合生产环境的 logfile "Logs/redis6380_log.txt" #指定log的保持路径,默认是创建在Redis安装目录下，如果有子目录需要手动创建，如此处的Logs目录 syslog-enabled yes #是否使用系统日志 syslog-ident redis6380 #在系统日志的标识名 appendonly yes #数据的保存为aof格式 appendfilename "appendonly.6380.aof" #数据保存文件 cluster-enabled yes #是否开启集群 cluster-config-file nodes.6380.conf cluster-node-timeout 15000 cluster-slave-validity-factor 10 cluster-migration-barrier 1 cluster-require-full-coverage yes
将上述配置文件保存到Redis目录下，并使用这些配置文件安装6个redis服务，命令如下：
D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-install D:/Redis-Cluster/Redis-x64-3.2.100/redis.6380.conf --service-name redis6380 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-install D:/Redis-Cluster/Redis-x64-3.2.100/redis.6381.conf --service-name redis6381 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-install D:/Redis-Cluster/Redis-x64-3.2.100/redis.6382.conf --service-name redis6382 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-install D:/Redis-Cluster/Redis-x64-3.2.100/redis.6383.conf --service-name redis6383 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-install D:/Redis-Cluster/Redis-x64-3.2.100/redis.6384.conf --service-name redis6384 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-install D:/Redis-Cluster/Redis-x64-3.2.100/redis.6385.conf --service-name redis6385
注意：
1）redis.6380.conf等配置文件最好使用完整路径，避免重启Redis集群出现问题
2）卸载命令为：
D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-uninstall D:/Redis-Cluster/Redis-x64-3.2.100/redis.6380.conf --service-name redis6380 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-uninstall D:/Redis-Cluster/Redis-x64-3.2.100/redis.6381.conf --service-name redis6381 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-uninstall D:/Redis-Cluster/Redis-x64-3.2.100/redis.6382.conf --service-name redis6382 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-uninstall D:/Redis-Cluster/Redis-x64-3.2.100/redis.6383.conf --service-name redis6383 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-uninstall D:/Redis-Cluster/Redis-x64-3.2.100/redis.6384.conf --service-name redis6384 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-uninstall D:/Redis-Cluster/Redis-x64-3.2.100/redis.6385.conf --service-name redis6385
启动这6个服务，命令如下：
D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-start --service-name redis6380 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-start --service-name redis6381 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-start --service-name redis6382 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-start --service-name redis6383 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-start --service-name redis6384 D:/Redis-Cluster/Redis-x64-3.2.100/redis-server.exe --service-start --service-name redis6385
执行结果：
安装ruby
（1）Ruby环境安装。
双击下载的“rubyinstaller-2.2.4-x64.exe”安装即可，同样，为了操作方便，也是建议安装在盘符根目录下，如： C:\Ruby22-x64 ，安装时这里选中后两个选项，
意思是将ruby添加到系统的环境变量中，在cmd命令中能直接使用ruby的命令
（1）安装Ruby环境下Redis的驱动
将下载的"Ruby环境下Redis的驱动文件(redis-3.2.2.gem)"拷贝到Ruby安装根目录（C:\Ruby22-x64）下。
然后执行安装命令如下：
gem install --local path_to_gem/filename.gem
创建Redis集群
将下载的“创建Redis集群的ruby脚本文件redis-trib.rb”文件拷贝到Redis安装根目录(D:\Redis-Cluster\Redis-x64-3.2.100)下。
（1）使用redis-trib.rb来创建Redis集群
MD下切换到Redis目录(D:\Redis-Cluster\Redis-x64-3.2.100)
D:/Redis-Cluster/Redis-x64-3.2.100/redis-trib.rb create --replicas 1 127.0.0.1:6380 127.0.0.1:6381 127.0.0.1:6382 127.0.0.1:6383 127.0.0.1:6384 127.0.0.1:6385
D:\Redis-Cluster\Redis-x64-3.2.100>redis-trib.rb create --replicas 1 127.0.0.1:6380 127.0.0.1:6381 127.0.0.1:6382 127.0.0.1:6383 127.0.0.1:6384 127.0.0.1:6385 >>> Creating cluster Connecting to node 127.0.0.1:6380: OK Connecting to node 127.0.0.1:6381: OK Connecting to node 127.0.0.1:6382: OK Connecting to node 127.0.0.1:6383: OK Connecting to node 127.0.0.1:6384: OK Connecting to node 127.0.0.1:6385: OK >>> Performing hash slots allocation on 6 nodes... Using 3 masters: 127.0.0.1:6380 127.0.0.1:6381 127.0.0.1:6382 Adding replica 127.0.0.1:6383 to 127.0.0.1:6380 Adding replica 127.0.0.1:6384 to 127.0.0.1:6381 Adding replica 127.0.0.1:6385 to 127.0.0.1:6382 M: bb6ef615bb0ae13275943caec0db9d30b9f35c5e 127.0.0.1:6380 slots:0-5460 (5461 slots) master M: b4d120f2983ad683f7b68992e1ba414722238db7 127.0.0.1:6381 slots:5461-10922 (5462 slots) master M: 837779b3965e2c9d4dd4385750aaaaf9a9039fb0 127.0.0.1:6382 slots:10923-16383 (5461 slots) master S: 5d154137180284d926ef51a91fc75f9438249ef8 127.0.0.1:6383 replicates bb6ef615bb0ae13275943caec0db9d30b9f35c5e S: ad151680a3e36cf2083ef822be0bdb075a7d36de 127.0.0.1:6384 replicates b4d120f2983ad683f7b68992e1ba414722238db7 S: 9a2260a5a6a2add84b622a453a6a7b86a29d180d 127.0.0.1:6385 replicates 837779b3965e2c9d4dd4385750aaaaf9a9039fb0 Can I set the above configuration? (type 'yes' to accept): yes >>> Nodes configuration updated >>> Assign a different config epoch to each node >>> Sending CLUSTER MEET messages to join the cluster Waiting for the cluster to join... >>> Performing Cluster Check (using node 127.0.0.1:6380)M: bb6ef615bb0ae13275943caec0db9d30b9f35c5e 127.0.0.1:6380 slots:0-5460 (5461 slots) master M: b4d120f2983ad683f7b68992e1ba414722238db7 127.0.0.1:6381 slots:5461-10922 (5462 slots) master M: 837779b3965e2c9d4dd4385750aaaaf9a9039fb0 127.0.0.1:6382 slots:10923-16383 (5461 slots) master M: 5d154137180284d926ef51a91fc75f9438249ef8 127.0.0.1:6383 slots: (0 slots) master replicates bb6ef615bb0ae13275943caec0db9d30b9f35c5e M: ad151680a3e36cf2083ef822be0bdb075a7d36de 127.0.0.1:6384 slots: (0 slots) master replicates b4d120f2983ad683f7b68992e1ba414722238db7 M: 9a2260a5a6a2add84b622a453a6a7b86a29d180d 127.0.0.1:6385 slots: (0 slots) master replicates 837779b3965e2c9d4dd4385750aaaaf9a9039fb0 [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.
备注：
（1）--replicas #指定集群中每个主节点配备几个从节点，这里设置为1。
（2）redis-trib.rb工具的使用
、create：创建集群 、check：检查集群 、info：查看集群信息 、fix：修复集群 、reshard：在线迁移slot 、rebalance：平衡集群节点slot数量 、add-node：将新节点加入集群 、del-node：从集群中删除节点 、set-timeout：设置集群节点间心跳连接的超时时间 、call：在集群全部节点上执行命令 、import：将外部redis数据导入集群
（2）检验是否真的创建成功
输入以下命令：
redis-trib.rb check 127.0.0.1:6380
如果现实信息如下，则说明创建的Redis集群是没问题。
D:\Redis-Cluster\Redis-x64-3.2.100>redis-trib.rb check 127.0.0.1:6380 Connecting to node 127.0.0.1:6380: OK Connecting to node 127.0.0.1:6383: OK Connecting to node 127.0.0.1:6382: OK Connecting to node 127.0.0.1:6384: OK Connecting to node 127.0.0.1:6385: OK Connecting to node 127.0.0.1:6381: OK >>> Performing Cluster Check (using node 127.0.0.1:6380) M: bb6ef615bb0ae13275943caec0db9d30b9f35c5e 127.0.0.1:6380 slots:0-5460 (5461 slots) master 1 additional replica(s) S: 5d154137180284d926ef51a91fc75f9438249ef8 127.0.0.1:6383 slots: (0 slots) slave replicates bb6ef615bb0ae13275943caec0db9d30b9f35c5e M: 837779b3965e2c9d4dd4385750aaaaf9a9039fb0 127.0.0.1:6382 slots:10923-16383 (5461 slots) master 1 additional replica(s) S: ad151680a3e36cf2083ef822be0bdb075a7d36de 127.0.0.1:6384 slots: (0 slots) slave replicates b4d120f2983ad683f7b68992e1ba414722238db7 S: 9a2260a5a6a2add84b622a453a6a7b86a29d180d 127.0.0.1:6385 slots: (0 slots) slave replicates 837779b3965e2c9d4dd4385750aaaaf9a9039fb0 M: b4d120f2983ad683f7b68992e1ba414722238db7 127.0.0.1:6381 slots:5461-10922 (5462 slots) master 1 additional replica(s) [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered. D:\Redis-Cluster\Redis-x64-3.2.100>
（3）信息查询
使用Redis客户端Redis-cli.exe来查看数据记录数，以及集群相关信息
原文作者：cctext
原文链接：https://www.cnblogs.com/yy3b2007com/p/11033009.html
相关推荐：redis数据库教程
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