Redis3.2.8集群安装配置

具体就不做介绍了，直接开始安装

准备环境：

使用2台centos服务器，每台机器上部署3个实例，集群为三个主节点与三个从节点：第一台192.168.1.107:7000 192.168.1.107:7001 192.168.1.107:7002 第二台192.168.1.108:7003  192.168.1.108:7004  192.168.1.108:7005

安装配置：

192.168.1.107服务器

#yum -y  install gcc zlib ruby rubygems#gem install redis#wget http://download.redis.io/releases/redis-3.2.8.tar.gz#tar -zxvf redis-3.2.8.tar.gz#cd redis-3.2.8#make && make install 将 redis-trib.rb 复制到 /usr/local/bin 目录下#cp src/redis-trib.rb /usr/local/bin/　　#mkdir -p /data/redis/{conf,data,logs}#cp redis.conf /data/redis/conf/redis-7000.conf #cp redis.conf /data/redis/conf/redis-7001.conf #cp redis.conf /data/redis/conf/redis-7002.conf

配置内容如下(redis-7000.conf其它类同)：

daemonize  yes  pidfile /data/redis/data/redis-7000.pid  port 7000  bind 192.168.1.107  unixsocket /data/redis/data/redis-7000.sock  unixsocketperm 700  timeout 300  loglevel verbose  logfile /data/redis/logs/redis-7000.log  databases 16  dbfilename dump-7000.rdb  dir /data/redis/data/    #aof持久化  appendonly yes  appendfilename appendonly-7000.aof  appendfsync everysec  no-appendfsync-on-rewrite yes    auto-aof-rewrite-percentage 80-100  auto-aof-rewrite-min-size 64mb    lua-time-limit 5000    #集群配置  cluster-enabled yes  cluster-config-file /data/redis/data/nodes-7000.conf  cluster-node-timeout 5000

同样的在192.168.1.108上配置其它端口，配置后我们分别启动

192.168.1.107主机#redis-server /data/redis/conf/redis-7000.conf#redis-server /data/redis/conf/redis-7001.conf#redis-server /data/redis/conf/redis-7002.conf192.168.1.108主机#redis-server /data/redis/conf/redis-7003.conf#redis-server /data/redis/conf/redis-7004.conf#redis-server /data/redis/conf/redis-7005.conf

分别在两台主机查看启动进程与端口：

# ps -ef|grep redisroot      4663     1  0 10:53 ?        00:00:09 redis-server 192.168.1.107:7000 [cluster]root      4667     1  0 10:53 ?        00:00:09 redis-server 192.168.1.107:7001 [cluster]root      5566     1  0 12:12 ?        00:00:06 redis-server 192.168.1.107:7002 [cluster]root      5611  5313  0 14:49 pts/1    00:00:00 grep redis# netstat -tnlp | grep redistcp        0      0 192.168.1.107:7000         0.0.0.0:*                   LISTEN      4663/redis-server 1 tcp        0      0 192.168.1.107:7001         0.0.0.0:*                   LISTEN      4667/redis-server 1 tcp        0      0 192.168.1.107:7002         0.0.0.0:*                   LISTEN      5566/redis-server 1 tcp        0      0 192.168.1.107:17000        0.0.0.0:*                   LISTEN      4663/redis-server 1 tcp        0      0 192.168.1.107:17001        0.0.0.0:*                   LISTEN      4667/redis-server 1 tcp        0      0 192.168.1.107:17002        0.0.0.0:*                   LISTEN      5566/redis-server 1

创建集群

redis-trib.rb命令介绍可以参考：http://weizijun.cn/2016/01/08/redis%20cluster%E7%AE%A1%E7%90%86%E5%B7%A5%E5%85%B7redis-trib-rb%E8%AF%A6%E8%A7%A3/# redis-trib.rb  create  --replicas  1  192.168.1.107:7000 192.168.1.107:7001  192.168.1.107:7002 192.168.1.108:7003  192.168.1.108:7004  192.168.1.108:7005>>> Creating cluster>>> Performing hash slots allocation on 6 nodes...Using 3 masters:192.168.1.108:7003192.168.1.107:7000192.168.1.108:7004Adding replica 192.168.1.107:7001 to 192.168.12.108:7003Adding replica 192.168.1.108:7005 to 192.168.12.107:7000Adding replica 192.168.1.107:7002 to 192.168.12.108:7004M: d0ce4d4eb8c503267ffea606e90d1c537a83a22e 192.168.1.107:7000   slots:5461-10922 (5462 slots) masterS: 24ca2753885db7f37c0e0077b1f43eb2b1a52e42 192.168.1.107:7001   replicates 8ee448821d5e757af73bab65861340e557b8cd14S: 90c36924c71ae924b1179ff1a384c53e5ea2e484 192.168.1.107:7002   replicates 5a93221a3281f88f9984c24b6e1d6f08b3685c89M: 8ee448821d5e757af73bab65861340e557b8cd14 192.168.1.108:7003   slots:0-5460 (5461 slots) masterM: 5a93221a3281f88f9984c24b6e1d6f08b3685c89 192.168.1.108:7004   slots:10923-16383 (5461 slots) masterS: a63176f88cbf58ab879421148da3b171f169540d 192.168.1.108:7005   replicates d0ce4d4eb8c503267ffea606e90d1c537a83a22eCan I set the above configuration? (type 'yes' to accept): yes  #输入yes>>> Nodes configuration updated>>> Assign a different config epoch to each node>>> Sending CLUSTER MEET messages to join the clusterWaiting for the cluster to join.....>>> Performing Cluster Check (using node 192.168.1.107:7000)M: d0ce4d4eb8c503267ffea606e90d1c537a83a22e 192.168.1.107:7000   slots:5461-10922 (5462 slots) masterM: 24ca2753885db7f37c0e0077b1f43eb2b1a52e42 192.168.1.107:7001   slots: (0 slots) master   replicates 8ee448821d5e757af73bab65861340e557b8cd14M: 90c36924c71ae924b1179ff1a384c53e5ea2e484 192.168.1.107:7002   slots: (0 slots) master   replicates 5a93221a3281f88f9984c24b6e1d6f08b3685c89M: 8ee448821d5e757af73bab65861340e557b8cd14 192.168.1.108:7003   slots:0-5460 (5461 slots) masterM: 5a93221a3281f88f9984c24b6e1d6f08b3685c89 192.168.1.108:7004   slots:10923-16383 (5461 slots) masterM: a63176f88cbf58ab879421148da3b171f169540d 192.168.1.108:7005   slots: (0 slots) master   replicates d0ce4d4eb8c503267ffea606e90d1c537a83a22e[OK] All nodes agree about slots configuration.>>> Check for open slots...>>> Check slots coverage...[OK] All 16384 slots covered.        #集群创建成功

集群验证

192.168.1.107的7002端口的节点写入数据，在192.168.1.108的7005端口查询，接方式为 redis-cli -h 192.168.31.245 -c -p 7002  ,加参数 -C 可连接到集群，因为上面 redis.conf 将 bind 改为了ip地址，所以 -h 参数不可以省略。# redis-cli -h 192.168.1.107 -c -p 7002192.168.1.108:7003> set test01 "this is test01"OK192.168.1.108:7003># redis-cli -h 192.168.1.108 -c -p 7005192.168.12.108:7005> get test01-> Redirected to slot [1840] located at 192.168.12.108:7003"this is test01"说明集群运作正常。

Redis 集群会把数据存在一个 master 节点，然后在这个 master 和其对应的salve 之间进行数据同步。当读取数据时，也根据一致性哈希算法到对应的 master 节点获取数据。只有当一个master 挂掉之后，才会启动一个对应的 salve 节点，充当 master 。

需要注意的是：必须要3个或以上的主节点，否则在创建集群时会失败，并且当存活的主节点数小于总节点数的一半时，整个集群就无法提供服务了。