这篇文章主要介绍了理论+实验——Redis集群的讲解,通过具体代码实例进行16298 讲解，并且分析了理论+实验——Redis集群的详细步骤与相关技巧,需要的朋友可以参考下https://www.b2bchain.cn/?p=16298

本文实例讲述了2、树莓派设置连接WiFi，开启VNC等等的讲解。分享给大家供大家参考文章查询地址https://www.b2bchain.cn/7039.html。具体如下：

一、Redis集群

1.1 概述

1.2 优势

1.3 实现方法

1.4 Redis-Cluster数据分片

二、问题

2.1 单节点Redis服务器带来的问题

2.2 解决方法

三、实验

——————————-Redis（所有节点操作）——————————-

[[email protected] utils]# vim /etc/redis/6379.conf 70 #bind 127.0.0.1 89 protected-mode no 93 port 6379 137 daemonize yes 833 cluster-enabled yes 841 cluster-config-file nodes-6379.conf 847 cluster-node-timeout 15000 700 appendonly yes [[email protected] utils]# /etc/init.d/redis_6379 restart [[email protected] utils]# cd /var/lib/redis/6379/ [[email protected] 6379]# ls appendonly.aof  dump.rdb  nodes-6379.conf 

——————————-仅master操作——————————-

[[email protected] ~]# gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 [[email protected] ~]# curl -sSL https://get.rvm.io | bash -s stable [email protected] profile.d]# source /etc/profile.d/rvm.sh  [[email protected] profile.d]# rvm list known [[email protected] profile.d]# rvm install 2.4.1 [[email protected] profile.d]# rvm use 2.4.1 Using /usr/local/rvm/gems/ruby-2.4.1 [[email protected] profile.d]# ruby -v ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-linux] [[email protected] profile.d]# gem install redis Fetching redis-4.2.2.gem Successfully installed redis-4.2.2 Parsing documentation for redis-4.2.2 Installing ri documentation for redis-4.2.2 Done installing documentation for redis after 0 seconds 1 gem installed  'master和node节点，各添加两个网卡，共六个'  [[email protected] network-scripts]# /etc/init.d/redis_6379 restart [[email protected] 6379]# redis-cli --cluster create 20.0.0.128:6379 20.0.0.129:6379 20.0.0.22:6379 20.0.0.23:6379 20.0.0.4:6379 20.0.0.5:6379 --cluster-replicas 1 >>> Performing hash slots allocation on 6 nodes... Master[0] -> Slots 0 - 5460 Master[1] -> Slots 5461 - 10922 Master[2] -> Slots 10923 - 16383 Adding replica 20.0.0.4:6379 to 20.0.0.128:6379 Adding replica 20.0.0.5:6379 to 20.0.0.129:6379 Adding replica 20.0.0.23:6379 to 20.0.0.22:6379 M: 44be018f73f20343548cf587cfb5c83c2a7b0099 20.0.0.128:6379    slots:[0-5460] (5461 slots) master M: 44be018f73f20343548cf587cfb5c83c2a7b0099 20.0.0.129:6379    slots:[5461-10922] (5462 slots) master M: 44be018f73f20343548cf587cfb5c83c2a7b0099 20.0.0.22:6379    slots:[10923-16383] (5461 slots) master S: 832077e6e98788914583c6cdaea9e54e3a2d7bfc 20.0.0.23:6379    replicates 44be018f73f20343548cf587cfb5c83c2a7b0099 S: 832077e6e98788914583c6cdaea9e54e3a2d7bfc 20.0.0.4:6379    replicates 44be018f73f20343548cf587cfb5c83c2a7b0099 S: 832077e6e98788914583c6cdaea9e54e3a2d7bfc 20.0.0.5:6379    replicates 44be018f73f20343548cf587cfb5c83c2a7b0099 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 20.0.0.128:6379) M: 44be018f73f20343548cf587cfb5c83c2a7b0099 20.0.0.128:6379    slots:[0-16383] (16384 slots) master    1 additional replica(s) S: 832077e6e98788914583c6cdaea9e54e3a2d7bfc 20.0.0.23:6379    slots: (0 slots) slave    replicates 44be018f73f20343548cf587cfb5c83c2a7b0099 [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered. [[email protected] 6379]# netstat -anpt | grep 6379 tcp        0      0 0.0.0.0:6379            0.0.0.0:*               LISTEN      25899/redis-server   tcp        0      0 0.0.0.0:16379           0.0.0.0:*               LISTEN      25899/redis-server   tcp        0      0 20.0.0.128:35538        20.0.0.128:16379        TIME_WAIT   -                    tcp        0      0 20.0.0.128:57292        20.0.0.23:16379         ESTABLISHED 25899/redis-server   tcp        0      0 20.0.0.128:59008        20.0.0.4:6379           TIME_WAIT   -                    tcp        0      0 20.0.0.128:16379        20.0.0.23:47274         ESTABLISHED 25899/redis-server   tcp        0      0 20.0.0.128:39346        20.0.0.23:6379          TIME_WAIT   -                    tcp        0      0 20.0.0.128:6379         20.0.0.23:54820         ESTABLISHED 25899/redis-server   tcp        0      0 20.0.0.129:44766        20.0.0.129:6379         TIME_WAIT   -                    tcp        0      0 20.0.0.128:38400        20.0.0.5:6379           TIME_WAIT   -                    tcp        0      0 20.0.0.128:39356        20.0.0.23:6379          TIME_WAIT   -                    tcp        0      0 20.0.0.22:36644         20.0.0.22:6379          TIME_WAIT   -                    tcp        0      0 20.0.0.128:53528        20.0.0.128:6379         TIME_WAIT   -                    tcp6       0      0 :::6379                 :::*                    LISTEN      25899/redis-server   tcp6       0      0 :::16379    

测试：

redis-cli -c -h 20.0.0.4 -p 6379   ###加个 -c 开启集群，就可以看到了  [[email protected] 6379]# redis-cli -c -h 20.0.0.128 -p 6379 20.0.0.128:6379> set name oo OK 20.0.0.128:6379> keys * 1) "name" 20.0.0.128:6379> get name "oo" 20.0.0.128:6379> exit [[email protected] 6379]# redis-cli -c -h 20.0.0.129 -p 6379 20.0.0.129:6379> keys * 1) "name" 20.0.0.129:6379> get name "oo" 20.0.0.129:6379> exit [[email protected] 6379]# redis-cli -c -h 20.0.0.22 -p 6379 20.0.0.22:6379> keys * 1) "name" 20.0.0.22:6379> get name "oo" 20.0.0.22:6379> exit [[email protected] 6379]# redis-cli-c -h 20.0.0.23 -p 6379 20.0.0.23:6379> keys * 1) "name" 20.0.0.23:6379> get name -> Redirected to slot [5798] located at 20.0.0.128:6379 "oo" 20.0.0.23:6379> exit [[email protected] 6379]# redis-cli -c -h 20.0.0.4 -p 6379 20.0.0.4:6379> keys * 1) "name" 20.0.0.4:6379> get name -> Redirected to slot [5798] located at 20.0.0.128:6379 "oo" 20.0.0.4:6379> exit [[email protected] 6379]# redis-cli -c -h 20.0.0.5 -p 6379 20.0.0.5:6379> keys * 1) "name" 20.0.0.5:6379> get name -> Redirected to slot [5798] located at 20.0.0.128:6379 "oo" 20.0.0.5:6379> exit 

——————————-生命周期设置——————————-

20.0.0.128:6379> EXPIRE  name 20  ##20秒生命周期  20.0.0.128:6379>keys *    查看  20秒后消失了 内存中也会消除  20.0.0.23:6379>keys*  复制集中也会消失 

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