Redis3.2.8集群安装配置

Posted 2020-10-06

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

#wgethttp://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.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-server192.168.1.107:7000 [cluster]

root     4667     1  0 10:53 ?        00:00:09 redis-server192.168.1.107:7001 [cluster]

root     5566     1  0 12:12 ?        00:00:06 redis-server192.168.1.107:7002 [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 slotsallocation 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 to192.168.12.108:7003

Adding replica 192.168.1.108:7005 to192.168.12.107:7000

Adding replica 192.168.1.107:7002 to192.168.12.108:7004

M: d0ce4d4eb8c503267ffea606e90d1c537a83a22e192.168.1.107:7000

  slots:5461-10922 (5462 slots) master

S: 24ca2753885db7f37c0e0077b1f43eb2b1a52e42192.168.1.107:7001

  replicates 8ee448821d5e757af73bab65861340e557b8cd14

S: 90c36924c71ae924b1179ff1a384c53e5ea2e484192.168.1.107:7002

  replicates 5a93221a3281f88f9984c24b6e1d6f08b3685c89

M: 8ee448821d5e757af73bab65861340e557b8cd14192.168.1.108:7003

  slots:0-5460 (5461 slots) master

M: 5a93221a3281f88f9984c24b6e1d6f08b3685c89192.168.1.108:7004

  slots:10923-16383 (5461 slots) master

S: a63176f88cbf58ab879421148da3b171f169540d192.168.1.108:7005

  replicates d0ce4d4eb8c503267ffea606e90d1c537a83a22e

Can I set the above configuration? (type‘yes‘ to accept): yes  #输入yes

>>> Nodes configuration updated

>>> Assign a different configepoch to each node

>>> Sending CLUSTER MEET messagesto join the cluster

Waiting for the cluster to join.....

>>> Performing Cluster Check(using node 192.168.1.107:7000)

M: d0ce4d4eb8c503267ffea606e90d1c537a83a22e192.168.1.107:7000

  slots:5461-10922 (5462 slots) master

M: 24ca2753885db7f37c0e0077b1f43eb2b1a52e42192.168.1.107:7001

  slots: (0 slots) master

  replicates 8ee448821d5e757af73bab65861340e557b8cd14

M: 90c36924c71ae924b1179ff1a384c53e5ea2e484192.168.1.107:7002

  slots: (0 slots) master

  replicates 5a93221a3281f88f9984c24b6e1d6f08b3685c89

M: 8ee448821d5e757af73bab65861340e557b8cd14192.168.1.108:7003

  slots:0-5460 (5461 slots) master

M: 5a93221a3281f88f9984c24b6e1d6f08b3685c89192.168.1.108:7004

  slots:10923-16383 (5461 slots) master

M: a63176f88cbf58ab879421148da3b171f169540d192.168.1.108:7005

  slots: (0 slots) master

  replicates d0ce4d4eb8c503267ffea606e90d1c537a83a22e

[OK] All nodes agree about slotsconfiguration.

>>> 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 at192.168.12.108:7003

"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。