环境准备：
搭建redis，并启动
安装集群插件
#EPEL源安装ruby支持
[root@db01 ~]# yum install ruby rubygems -y
#查看gem源
[root@db01 ~]# gem sources -l
*** CURRENT SOURCES ***
http://rubygems.org/
#添加阿里云的gem源
[root@db01 ~]# gem sources -a http://mirrors.aliyun.com/rubygems/
http://mirrors.aliyun.com/rubygems/ added to sources
#删除国外gem源
[root@db01 ~]# gem sources --remove https://rubygems.org/
http://rubygems.org/ removed from sources
#再次查看gem源
[root@db01 ~]# gem sources -l
#使用gem安装redis的ruby插件
[root@db01 ~]# gem install redis -v 3.3.3
Successfully installed redis-3.3.3
1 gem installed
Installing ri documentation for redis-3.3.3...
Installing RDoc documentation for redis-3.3.3...
redis-trib.rb命令
[root@db01 ~]# redis-trib.rb
create #创建一个集群
check #检查集群
info #集群状态
fix #修复集群
reshard #重新分配槽位
rebalance #平衡槽位数量
add-node #添加节点
del-node #删除节点
set-timeout #设置超时时间
call #向集群所有机器输入命令
import #导入数据
help #帮助
关联所有节点
[root@db01 ~]# redis-trib.rb create --replicas 1 172.16.1.51:6379 172.16.1.52:6379 172.16.1.53:6379 172.16.1.52:6380 172.16.1.53:6380 172.16.1.51:6380
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
172.16.1.51:6379
172.16.1.52:6379
172.16.1.53:6379
Adding replica 172.16.1.52:6380 to 172.16.1.51:6379
Adding replica 172.16.1.51:6380 to 172.16.1.52:6379
Adding replica 172.16.1.53:6380 to 172.16.1.53:6379
M: 5ad7bd957133eac9c3a692b35f8ae72258cf0ece 172.16.1.51:6379
slots:0-5460 (5461 slots) master
M: 7c79559b280db9d9c182f3a25c718efe9e934fc7 172.16.1.52:6379
slots:5461-10922 (5462 slots) master
M: d27553035a3e91c78d375208c72b756e9b2523d4 172.16.1.53:6379
slots:10923-16383 (5461 slots) master
S: fee551a90c8646839f66fa0cd1f6e5859e9dd8e0 172.16.1.52:6380
replicates 5ad7bd957133eac9c3a692b35f8ae72258cf0ece
S: e4794215d9d3548e9c514c10626ce618be19ebfb 172.16.1.53:6380
replicates d27553035a3e91c78d375208c72b756e9b2523d4
S: 1d10edbc5ed08f85d2afc21cd338b023b9dd61b4 172.16.1.51:6380
replicates 7c79559b280db9d9c182f3a25c718efe9e934fc7
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 172.16.1.51:6379)
M: 5ad7bd957133eac9c3a692b35f8ae72258cf0ece 172.16.1.51:6379
slots:0-5460 (5461 slots) master
1 additional replica(s)
S: e4794215d9d3548e9c514c10626ce618be19ebfb 172.16.1.53:6380
slots: (0 slots) slave
replicates d27553035a3e91c78d375208c72b756e9b2523d4
M: d27553035a3e91c78d375208c72b756e9b2523d4 172.16.1.53:6379
slots:10923-16383 (5461 slots) master
1 additional replica(s)
S: fee551a90c8646839f66fa0cd1f6e5859e9dd8e0 172.16.1.52:6380
slots: (0 slots) slave
replicates 5ad7bd957133eac9c3a692b35f8ae72258cf0ece
S: 1d10edbc5ed08f85d2afc21cd338b023b9dd61b4 172.16.1.51:6380
slots: (0 slots) slave
replicates 7c79559b280db9d9c182f3a25c718efe9e934fc7
M: 7c79559b280db9d9c182f3a25c718efe9e934fc7 172.16.1.52:6379
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.
查看集群状态
[root@db01 ~]# redis-cli -h 172.16.1.51 -p 6379 CLUSTER NODES
e4794215d9d3548e9c514c10626ce618be19ebfb 172.16.1.53:6380 slave d27553035a3e91c78d375208c72b756e9b2523d4 0 1596767315453 5 connected
d27553035a3e91c78d375208c72b756e9b2523d4 172.16.1.53:6379 master - 0 1596767315453 3 connected 10923-16383
5ad7bd957133eac9c3a692b35f8ae72258cf0ece 172.16.1.51:6379 myself,master - 0 0 1 connected 0-5460
fee551a90c8646839f66fa0cd1f6e5859e9dd8e0 172.16.1.52:6380 slave 5ad7bd957133eac9c3a692b35f8ae72258cf0ece 0 1596767313429 4 connected
1d10edbc5ed08f85d2afc21cd338b023b9dd61b4 172.16.1.51:6380 slave 7c79559b280db9d9c182f3a25c718efe9e934fc7 0 1596767313935 6 connected
7c79559b280db9d9c182f3a25c718efe9e934fc7 172.16.1.52:6379 master - 0 1596767314949 2 connected 5461-10922
重新做主从
#由于使用工具，始终有一台机器从库本机的从库，所以要重新分配主从
172.16.1.52:6380> CLUSTER REPLICATE d27553035a3e91c78d375208c72b756e9b2523d4
OK
172.16.1.53:6380> CLUSTER REPLICATE 5ad7bd957133eac9c3a692b35f8ae72258cf0ece
OK
插入数据测试
[root@db01 ~]# redis-trib.rb info 172.16.1.52:6379
172.16.1.52:6379 (7c79559b...) -> 332 keys | 5462 slots | 1 slaves.
172.16.1.51:6379 (5ad7bd95...) -> 341 keys | 5461 slots | 1 slaves.
172.16.1.53:6379 (d2755303...) -> 327 keys | 5461 slots | 1 slaves.
[OK] 1000 keys in 3 masters.
0.06 keys per slot on average.
[root@db01 ~]# redis-trib.rb info 172.16.1.52:6379
172.16.1.52:6379 (7c79559b...) -> 661 keys | 5462 slots | 1 slaves.
172.16.1.51:6379 (5ad7bd95...) -> 674 keys | 5461 slots | 1 slaves.
172.16.1.53:6379 (d2755303...) -> 665 keys | 5461 slots | 1 slaves.
[OK] 2000 keys in 3 masters.
0.12 keys per slot on average.