Redis3.2.8集群安装配置
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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
#tar -zxvf redis-3.2.0.tar.gz
#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.conf 192.168.1.108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 redis root 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 redis tcp 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: 192.168.1.108:7003 192.168.1.107:7000 192.168.1.108:7004 Adding replica 192.168.1.107:7001 to 192.168.12.108:7003 Adding replica 192.168.1.108:7005 to 192.168.12.107:7000 Adding replica 192.168.1.107:7002 to 192.168.12.108:7004 M: d0ce4d4eb8c503267ffea606e90d1c537a83a22e 192.168.1.107:7000 slots:5461-10922 (5462 slots) master S: 24ca2753885db7f37c0e0077b1f43eb2b1a52e42 192.168.1.107:7001 replicates 8ee448821d5e757af73bab65861340e557b8cd14 S: 90c36924c71ae924b1179ff1a384c53e5ea2e484 192.168.1.107:7002 replicates 5a93221a3281f88f9984c24b6e1d6f08b3685c89 M: 8ee448821d5e757af73bab65861340e557b8cd14 192.168.1.108:7003 slots:0-5460 (5461 slots) master M: 5a93221a3281f88f9984c24b6e1d6f08b3685c89 192.168.1.108:7004 slots:10923-16383 (5461 slots) master S: a63176f88cbf58ab879421148da3b171f169540d 192.168.1.108:7005 replicates d0ce4d4eb8c503267ffea606e90d1c537a83a22e Can 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 cluster Waiting 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) master M: 24ca2753885db7f37c0e0077b1f43eb2b1a52e42 192.168.1.107:7001 slots: (0 slots) master replicates 8ee448821d5e757af73bab65861340e557b8cd14 M: 90c36924c71ae924b1179ff1a384c53e5ea2e484 192.168.1.107:7002 slots: (0 slots) master replicates 5a93221a3281f88f9984c24b6e1d6f08b3685c89 M: 8ee448821d5e757af73bab65861340e557b8cd14 192.168.1.108:7003 slots:0-5460 (5461 slots) master M: 5a93221a3281f88f9984c24b6e1d6f08b3685c89 192.168.1.108:7004 slots:10923-16383 (5461 slots) master M: 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 7002 192.168.1.108:7003> set test01 "this is test01" OK 192.168.1.108:7003> # redis-cli -h 192.168.1.108 -c -p 7005 192.168.12.108:7005> 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。
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