利用工具部署redis集群

本文主要是介绍利用工具部署redis集群，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

1安装redis（本例已安装可忽略）

[root@db01 ~]# yum makecache fast
[root@db01 ~]# yum install rubygems
[root@db01 ~]# gem sources --remove https://rubygems.org/
[root@db01 ~]# gem sources -a http://mirrors.aliyun.com/rubygems/
[root@db01 ~]# gem update - system
[root@db01 ~]# gem install redis -v 3.3.5

2分别在三台机器中kill掉之前手动配置的redis集群（测试环境）：

[root@db01 ~]# pkill redis
[root@db01 ~]# pkill redis
[root@db01 ~]# rm -rf /data/redis_cluster/redis_6380/*
[root@db01 ~]# rm -rf /data/redis_cluster/redis_6381/*
[root@db01 ~]# 

3分别在三台机器中启动所有单节点redis

[root@db01 ~]# sh redis_shell.sh start 6380
[root@db01 ~]# sh redis_shell.sh start 6381

 4使用工具一键搭建集群

[root@db01 ~]# cd /opt/redis_cluster/redis/src/
[root@db01 src]# ./redis-trib.rb create --replicas 1 10.0.0.201:6380 10.0.0.202:6380 10.0.0.203:6380 10.0.0.201:6381 10.0.0.202:6381 10.0.0.203:6381

 5修复使用工具搭建集群的一个bug：

#db03的6381复制的不是db01的6380，这是一个bug，按照下列的语句执行的结果是：
db01的6381复制的是db02的6380
db02的6381复制的是db01的6380
db03的6381复制的是db02的6380
这违背了我们前面设计的架构
[root@db01 ~]# sh redis_shell.sh login 6380
10.0.0.201:6380> cluster nodes
e92cd97d2c06d2cc02547bcd7ac64b9f6fb44fb5 10.0.0.203:6380 master - 0 1618335912245 3 connected 10923-16383
9e6565d8f0a8ed0d6d56437dcf4b58cbb17a3c0f 10.0.0.202:6380 master - 0 1618335915275 2 connected 5461-10922
a31deef0baf970cef6c798f1e320fb4ba5543daf 10.0.0.203:6381 slave e92cd97d2c06d2cc02547bcd7ac64b9f6fb44fb5 0 1618335916283 6 connected
c37e5f309b2d07012f2efb11053c517b5f51eba0 10.0.0.202:6381 slave 3a9aeeeb4ac0c76a5ba3c66bb917161348582c01 0 1618335913257 5 connected
3a9aeeeb4ac0c76a5ba3c66bb917161348582c01 10.0.0.201:6380 myself,master - 0 0 1 connected 0-5460
8cea03a478990dc7e6d21f1b671c70dd921fcdb2 10.0.0.201:6381 slave 9e6565d8f0a8ed0d6d56437dcf4b58cbb17a3c0f 0 1618335917291 4 connected
10.0.0.201:6380> 

[root@db01 ~]# redis-cli -c -h db02 -p 6381 cluster replicate e92cd97d2c06d2cc02547bcd7ac64b9f6fb44fb5
OK
[root@db01 ~]# redis-cli -c -h db03 -p 6381 cluster replicate 3a9aeeeb4ac0c76a5ba3c66bb917161348582c01
OK
[root@db01 ~]# sh redis_shell.sh login 6380
10.0.0.201:6380> cluster nodes
e92cd97d2c06d2cc02547bcd7ac64b9f6fb44fb5 10.0.0.203:6380 master - 0 1618337145162 3 connected 10923-16383
9e6565d8f0a8ed0d6d56437dcf4b58cbb17a3c0f 10.0.0.202:6380 master - 0 1618337142635 2 connected 5461-10922
a31deef0baf970cef6c798f1e320fb4ba5543daf 10.0.0.203:6381 slave 3a9aeeeb4ac0c76a5ba3c66bb917161348582c01 0 1618337143645 6 connected
c37e5f309b2d07012f2efb11053c517b5f51eba0 10.0.0.202:6381 slave e92cd97d2c06d2cc02547bcd7ac64b9f6fb44fb5 0 1618337144655 5 connected
3a9aeeeb4ac0c76a5ba3c66bb917161348582c01 10.0.0.201:6380 myself,master - 0 0 1 connected 0-5460
8cea03a478990dc7e6d21f1b671c70dd921fcdb2 10.0.0.201:6381 slave 9e6565d8f0a8ed0d6d56437dcf4b58cbb17a3c0f 0 1618337145665 4 connected
10.0.0.201:6380> 

6检查集群的完整性：

[root@db01 ~]# cd /opt/redis_cluster/redis/src
[root@db01 src]# ./redis-trib.rb check 10.0.0.201:6380

7检查槽位是否都在合理的误差范围内：

[root@db01 src]# ./redis-trib.rb rebalance 10.0.0.201:6380

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