工具搭建redis集群

1.环境准备

节点	IP	端口
节点1	172.16.1.51	6379,6380
节点2	172.16.1.52	6379,6380
节点3	172.16.1.53	6379,6380

2.搭建redis(前面的章节都有)

3.启动所有redis(前面的章节都有)

4.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...

5. 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

6.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.

7.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

8.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 ###52的6380端口做到53上####
172.16.1.53:6380> CLUSTER REPLICATE 5ad7bd957133eac9c3a692b35f8ae72258cf0ece
OK ###53的6380端口做到51上####

9.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.