Redis伪集群

集群正常工作至少需要3个主节点（本示例创建6个节点，3主3从节点）

 

安装前提，要有ruby、rubygems环境，先安装一下：

#安装rubyyum --nogpgcheck -y install rubyyum --nogpgcheck -y install ruby-devel.x86_64#安装rubygemyum --nogpgcheck -y install rubygems#安装Ruby的redis接口gem-redis

 

安装Redis软件

#进入安装目录cd /usr/local/rm -rf redisrm -rf redis-3.0.3#解压tar -zxvf redis-3.0.3.tar.gzmv redis-3.0.3 redis#进入源码目录cd redis#编译安装make && make install

 

创建集群的相关配置

#创建集群需要的目录mkdir -p /usr/local/redis/cluster/16001/mkdir -p /usr/local/redis/cluster/16002/mkdir -p /usr/local/redis/cluster/16003/mkdir -p /usr/local/redis/cluster/16004/mkdir -p /usr/local/redis/cluster/16005/mkdir -p /usr/local/redis/cluster/16006/#修改配置文件redis.conf#cp /usr/local/redis/redis.conf /usr/local/redis/cluster/16001/redis.conf#cp /usr/local/redis/redis.conf /usr/local/redis/cluster/16002/redis.conf#cp /usr/local/redis/redis.conf /usr/local/redis/cluster/16003/redis.conf#cp /usr/local/redis/redis.conf /usr/local/redis/cluster/16004/redis.conf#cp /usr/local/redis/redis.conf /usr/local/redis/cluster/16005/redis.conf#cp /usr/local/redis/redis.conf /usr/local/redis/cluster/16006/redis.conf

 

配置文件示例：

daemonize nopidfile /var/run/redis.pid#修改端口port 16001tcp-backlog 511timeout 0tcp-keepalive 0loglevel noticelogfile ""databases 16save 900 1save 300 10save 60 10000stop-writes-on-bgsave-error yesrdbcompression yesrdbchecksum yesdbfilename dump.rdbdir ./slave-serve-stale-data yesslave-read-only yesrepl-diskless-sync norepl-diskless-sync-delay 5repl-disable-tcp-nodelay noslave-priority 100#修改为yesappendonly yesappendfilename "appendonly.aof"appendfsync everysecno-appendfsync-on-rewrite noauto-aof-rewrite-percentage 100auto-aof-rewrite-min-size 64mbaof-load-truncated yeslua-time-limit 5000slowlog-log-slower-than 10000slowlog-max-len 128latency-monitor-threshold 0notify-keyspace-events ""hash-max-ziplist-entries 512hash-max-ziplist-value 64list-max-ziplist-entries 512list-max-ziplist-value 64set-max-intset-entries 512zset-max-ziplist-entries 128zset-max-ziplist-value 64hll-sparse-max-bytes 3000activerehashing yesclient-output-buffer-limit normal 0 0 0client-output-buffer-limit slave 256mb 64mb 60client-output-buffer-limit pubsub 32mb 8mb 60hz 10aof-rewrite-incremental-fsync yes#=========================新增===============================daemonize yescluster-enabled yescluster-config-file nodes.confcluster-node-timeout 5000#========================================================

 

启动Redis实例：

#分别启动这6个redis实例（此时，节点均以Redis Cluster的方式运行，但并没有自动构建集群，因为还处于“我不认识你，你不属于我”的状态，它们每个都是孤零零的Redis节点，或者说只包含了一个节点的集群）cd /usr/local/redis/cluster/16001 && redis-server redis.conf > redis.log 2>&1 &cd /usr/local/redis/cluster/16002 && redis-server redis.conf > redis.log 2>&1 &cd /usr/local/redis/cluster/16003 && redis-server redis.conf > redis.log 2>&1 &cd /usr/local/redis/cluster/16004 && redis-server redis.conf > redis.log 2>&1 &cd /usr/local/redis/cluster/16005 && redis-server redis.conf > redis.log 2>&1 &cd /usr/local/redis/cluster/16006 && redis-server redis.conf > redis.log 2>&1 &

##启动之后使用命令查看redis的启动情况
ps -ef|grep redis

创建集群，让上面的实例互相通讯

#创建集群，让上面的实例互相通讯（1 表示为每个master分配一个salve）/usr/local/redis/src/redis-trib.rb create --replicas 1 \127.0.0.1:16001 \127.0.0.1:16002 \127.0.0.1:16003 \127.0.0.1:16004 \127.0.0.1:16005 \127.0.0.1:16006

集群创建完成，可以使用下面的命令查看相关信息：

#查看集群目前状况redis-cli -c -p 16001#打印集群的信息cluster info#列出集群当前已知的所有节点（node），以及这些节点的相关信息。cluster nodes

 

输出的信息：

127.0.0.1:16002 master - 0 1439345771781 2 connected 5461-10922127.0.0.1:16003 master - 0 1439345772286 3 connected 10923-16383127.0.0.1:16001 myself,master - 0 0 1 connected 0-5460127.0.0.1:16004 slave 2566ea486fc30c911aafaf1b71130fd24a38dba9 0 1439345772791 4 connected127.0.0.1:16005 slave edea1e50bd224c6895b1904bce79e83fa07d6017 0 1439345772286 5 connected127.0.0.1:16006 slave ab06e033698627ce0ecd4c8c645585a1ae70cc84 0 1439345771276 6 connected

从上面的信息可以明显看到哪些是主节点、从节点。

#将节点的配置文件保存到硬盘里

cluster saveconfig

#------------------------测试-----------------------------------
#连接端口（可以使用其他端口测试16001 -> 16006）
redis-cli -c -p 16001

127.0.0.1:16001> set key001 v001
127.0.0.1:16001> get key001

 

正常输出信息的话，集群建立成功，集群搭建完成。