redis集群搭建 Installing Redis Cluster
简介：Redis的集群模式实现了数据的分布式存储，每个节点存储不同的数据，实现数据动态扩容。
优点：无中心节点架构，数据按照slot分布在多个节点上
缺点：不支持多数据库
1、安装包准备
1、redis-4.0.1.tar.gz redis源文件
下载地址：https://download.redis.io/releases/redis-4.0.1.tar.gz
2、ruby-2.5.9.tar.gz ruby安装包
2、安装机器准备
三台机器：192.168.43.120 192.168.43.130 192.168.43.140 3主3从，每台机器两个节点
3、目录创建和redis编译
a、在120机器上创建目录：/opt/soft
b、进入soft目录，执行 wget https://download.redis.io/releases/redis-4.0.1.tar.gz 下载redis源文件
c、执行 tar -zxvf redis-4.0.1.tar.gz 解压源文件包，解压后得到redis-4.0.1目录
d、cd redis-4.0.1 目录，编译源文件，执行命令：make
如果出现以下错误：
https://img2022.cnblogs.com/blog/367511/202204/367511-20220412154030666-2091217696.png
说明没有gcc，运行 yum install gcc
再执行make命令，如果出现以下错误：
https://img2022.cnblogs.com/blog/367511/202204/367511-20220412165243524-896952097.png
则执行命令：make MALLOC=libc
4、节点创建
每台机器配置两个节点 7000和7001
创建目录 mkdir cluster
https://img2022.cnblogs.com/blog/367511/202204/367511-20220412175209179-649233519.png
进入cluster目录，分别创建7000和7001目录
https://img2022.cnblogs.com/blog/367511/202204/367511-20220412175318307-16788379.png
复制配置文件，把redis.conf分别复制到7000和7001下
https://img2022.cnblogs.com/blog/367511/202204/367511-20220412175619183-932322570.png
增加配置：
分别在7000和7001下的redis.conf添加如下配置
https://img2022.cnblogs.com/blog/367511/202204/367511-20220412192530885-20508130.png
https://img2022.cnblogs.com/blog/367511/202204/367511-20220412193611490-1407400478.png
bind 192.168.43.140
port 7000
#masterauth 123456
#requirepass 123456
cluster-enabled yes
cluster-config-file nodes-7000.conf
cluster-node-timeout 5000
appendonly yes 保存退出
5、启动节点
执行命令分别启动7000和7001节点：
./src/redis-server /opt/soft/redis-4.0.1/cluster/7000/redis.conf &
./src/redis-server /opt/soft/redis-4.0.1/cluster/7001/redis.conf &
启动成功如下：
https://img2022.cnblogs.com/blog/367511/202204/367511-20220412190532980-1813128148.png
其它两台机器一样操作
6、创建集群（只需要在一台机器上执行）
a、安装ruby
tar -zxvf ruby-2.5.9.tar.gz
cd ruby-2.5.9/
./configure --prefix=/usr/local/ruby
make && make install
查看安装后的版本
/usr/local/ruby/bin/ruby -v
设置环境变量
vi /etc/profile
export PATH=$PATH:/usr/local/ruby/bin:
source /etc/profile
b、安装gem
运行命令gem install redis
https://img2022.cnblogs.com/blog/367511/202204/367511-20220414135802934-233975203.png
出现如下错误说明确实zlib库
yum install zlib-devel
集成zlib库到ruby环境
cd /opt/soft/ruby-2.5.9/ext/zlib/
ruby extconf.rb
https://img2022.cnblogs.com/blog/367511/202204/367511-20220414140035901-1299054981.png
操作之前修改Makefile里的文件
vi Makefile
在文件最后找到：zlib.o: $(top_srcdir)/include/ruby.h 修改为 zlib.o: ../../include/ruby.h 保存退出
执行命令 make && make install
执行命令gem install redis 如果报一下错误
https://img2022.cnblogs.com/blog/367511/202204/367511-20220414140648830-808517238.png
安装 openssl-devel
yum install openssl-devel
集成openssl库到ruby
cd /opt/soft/ruby-2.5.9/ext/openssl/
ruby extconf.rb
修改Makefile 里面的
ossl.o: $(top_srcdir)/include/ruby.h 修改为 ossl.o: ../../include/ruby.h
ossl_asn1.o: $(top_srcdir)/include/ruby.h 修改为 ossl_asn1.o: ../../include/ruby.h
ossl_bio.o: $(top_srcdir)/include/ruby.h
ossl_bn.o: $(top_srcdir)/include/ruby.h
ossl_cipher.o: $(top_srcdir)/include/ruby.h
等等全部修改
保存退出
执行命令 make && make install
最后 运行命令gem install redis
如果卡死 执行 gem sources --add https://gems.ruby-china.com/ --remove https://rubygems.org/
https://img2022.cnblogs.com/blog/367511/202204/367511-20220414144036298-1972025300.png
c、创建集群
./redis-trib.rb create --replicas 1 192.168.43.120:7000 192.168.43.120:7001 192.168.43.130:7000 192.168.43.130:7001 192.168.43.140:7000 192.168.43.140:7001
# ./redis-trib.rb create --replicas 1 192.168.43.120:7000 192.168.43.120:7001 192.168.43.130:7000192.168.43.130:7001 192.168.43.140:7000 192.168.43.140:7001
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
192.168.43.120:7000
192.168.43.130:7000
192.168.43.140:7000
Adding replica 192.168.43.130:7001 to 192.168.43.120:7000
Adding replica 192.168.43.120:7001 to 192.168.43.130:7000
Adding replica 192.168.43.140:7001 to 192.168.43.140:7000
M: 5b341137f0fa22573b34a14206b3b4c625986f42 192.168.43.120:7000
slots:0-5460 (5461 slots) master
S: 5e162d8d5dad7e6e4fa9ecefac9b3d27e8659e33 192.168.43.120:7001
replicates 6cbcdc0f773f5c1d895aeb33b29da449890e3064
M: 6cbcdc0f773f5c1d895aeb33b29da449890e3064 192.168.43.130:7000
slots:5461-10922 (5462 slots) master
S: 6ac36c5449c77caca707b67c8d01dcc9efe3f0fa 192.168.43.130:7001
replicates 5b341137f0fa22573b34a14206b3b4c625986f42
M: f8c1c69d67ebecb3e6092e901fe1ca66bd097381 192.168.43.140:7000
slots:10923-16383 (5461 slots) master
S: 4e632fd278a48016c62255746f5128c121a71dfe 192.168.43.140:7001
replicates f8c1c69d67ebecb3e6092e901fe1ca66bd097381
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 192.168.43.120:7000)
M: 5b341137f0fa22573b34a14206b3b4c625986f42 192.168.43.120:7000
slots:0-5460 (5461 slots) master
1 additional replica(s)
S: 6ac36c5449c77caca707b67c8d01dcc9efe3f0fa 192.168.43.130:7001
slots: (0 slots) slave
replicates 5b341137f0fa22573b34a14206b3b4c625986f42
M: 6cbcdc0f773f5c1d895aeb33b29da449890e3064 192.168.43.130:7000
slots:5461-10922 (5462 slots) master
1 additional replica(s)
M: f8c1c69d67ebecb3e6092e901fe1ca66bd097381 192.168.43.140:7000
slots:10923-16383 (5461 slots) master
1 additional replica(s)
S: 4e632fd278a48016c62255746f5128c121a71dfe 192.168.43.140:7001
slots: (0 slots) slave
replicates f8c1c69d67ebecb3e6092e901fe1ca66bd097381
S: 5e162d8d5dad7e6e4fa9ecefac9b3d27e8659e33 192.168.43.120:7001
slots: (0 slots) slave
replicates 6cbcdc0f773f5c1d895aeb33b29da449890e3064
All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
All 16384 slots covered.
最后客户端测试
https://img2022.cnblogs.com/blog/367511/202204/367511-20220414144751270-1488762613.png
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