redis集群搭建（伪集群）

1.准备工作

去官网下载好你想要安装的redis版本，下载链接

2.搭建步骤

输入命令yum install gcc-c++安装好gcc环境，将下载好的redis安装包上传到 /usr/local

解压redis安装包

tar -zxvf redis-4.0.11.tar.gz

进入解压后的目录进行编译

cd /usr/local/redis-4.0.11

make

编译这一步可以指定目录，也就是安装的指定目录

把上一步的make 写成  make PREFIX=/usr/local/redis install   （在这里我指定的目录为 /usr/local/redis）

安装完毕之后 redis文件夹下面会生成一个bin目录

bin目录下有以下几个文件

复制redis.conf到bin目录下

cp  /usr/local/redis-4.0.11 /usr/local/redis/bin

进入bin目录

cd /usr/local/redis/bin

编辑redis.conf

vi redis.conf

进行如下修改

daemonize    yes                          //redis后台运行
cluster-enabled  yes                      //开启集群  把注释#去掉
cluster-node-timeout  5000                //请求超时  设置5秒够了
appendonly  yes                           //aof日志开启  有需要就开启，它会每次写操作都记录一条日志

创建集群目录

cd /usr/local

mkdir redis-cluster

将bin目录下的文件拷贝到集群目录下的节点目录中，共有6个目录，分别是redis01、redis02、redis03、redis04、redis05、redis06

cp -r /usr/local/redis/bin/ /usr/local/redis-cluster/redis01

cp -r /usr/local/redis/bin/ /usr/local/redis-cluster/redis02

cp -r /usr/local/redis/bin/ /usr/local/redis-cluster/redis03

cp -r /usr/local/redis/bin/ /usr/local/redis-cluster/redis04

cp -r /usr/local/redis/bin/ /usr/local/redis-cluster/redis05

cp -r /usr/local/redis/bin/ /usr/local/redis-cluster/redis06

对每个目录下的redis.conf文件进行如下修改

pidfile  /var/run/redis_7001.pid          //redis01下7001，redis下7002，以此类推，下同
port  7001                               
cluster-config-file  nodes_7001.conf      //集群的配置  配置文件首次启动自动生成 7001,7002,7003

在redis-cluster目录下新建一个启动脚本start-all.sh

cd redis01
./redis-server redis.conf
cd ..
cd redis02
./redis-server redis.conf
cd ..
cd redis03
./redis-server redis.conf
cd ..
cd redis04
./redis-server redis.conf
cd ..
cd redis05
./redis-server redis.conf
cd ..
cd redis06
./redis-server redis.conf
cd ..

给启动脚本赋予权限

chmod +x start.sh

执行启动脚本，启动redis

./start-all.sh

将redis源码目录src下的redis-trib.rb拷贝到redis-cluster目录下

cp /usr/local/redis-4.0.11/src/redis-trib.rb /usr/local/redis-cluster

根据这个redis-trib.rb这个文件的后缀，很明显还需要安装ruby，查看是否安装ruby以及版本

ruby -version

低于2.2的版本在后续安装中会出现问题，如安装的版本低于2.2，则需要安装2.2以上的版本

具体安装步骤可以参考博主的另一篇博客：搭建redis集群的过程中遇到的问题

安装好ruby环境之后，再用 gem 这个命令来安装 redis接口 

gem install redis

安装完事儿之后，执行redis-trib.rb

/usr/local/redis-cluster/redis-trib.rb  create  --replicas  1  192.168.25.133:7001 192.168.25.133:7002  192.168.25.133:7003 192.168.25.133:7004  192.168.25.133:7005  192.168.25.133:7006

如遇到如下提示信息Can I set the above configuration? (type 'yes' to accept):输入Y

创建成功会出现如下的信息：

>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
192.168.106.132:7001
192.168.106.132:7002
192.168.106.132:7003
Adding replica 192.168.106.132:7004 to 192.168.106.132:7001
Adding replica 192.168.106.132:7005 to 192.168.106.132:7002
Adding replica 192.168.106.132:7006 to 192.168.106.132:7003
M: 6c388e0cd04990b23e2e65b285b5f9c1bc996538 192.168.106.132:7001
slots:0-5460 (5461 slots) master
M: 01e9cd67978b1cad73a40e9a70000a236744cb17 192.168.106.132:7002
slots:5461-10922 (5462 slots) master
M: 72a649017fdd5d4045f9d58df8b231c2d69e6c32 192.168.106.132:7003
slots:10923-16383 (5461 slots) master
S: b90aa487cf48270df43e79af98807bb5ffabbe34 192.168.106.132:7004
replicates 6c388e0cd04990b23e2e65b285b5f9c1bc996538
S: f873f54c61dbb613df58fa4b9ff8bc3dd48e2388 192.168.106.132:7005
replicates 01e9cd67978b1cad73a40e9a70000a236744cb17
S: daa813e169580417f4410fac86a3d4ab9abda804 192.168.106.132:7006
replicates 72a649017fdd5d4045f9d58df8b231c2d69e6c32
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 192.168.106.132:7001)
M: 6c388e0cd04990b23e2e65b285b5f9c1bc996538 192.168.106.132:7001
slots:0-5460 (5461 slots) master
1 additional replica(s)
S: b90aa487cf48270df43e79af98807bb5ffabbe34 192.168.106.132:7004
slots: (0 slots) slave
replicates 6c388e0cd04990b23e2e65b285b5f9c1bc996538
M: 72a649017fdd5d4045f9d58df8b231c2d69e6c32 192.168.106.132:7003
slots:10923-16383 (5461 slots) master
1 additional replica(s)
M: 01e9cd67978b1cad73a40e9a70000a236744cb17 192.168.106.132:7002
slots:5461-10922 (5462 slots) master
1 additional replica(s)
S: daa813e169580417f4410fac86a3d4ab9abda804 192.168.106.132:7006
slots: (0 slots) slave
replicates 72a649017fdd5d4045f9d58df8b231c2d69e6c32
S: f873f54c61dbb613df58fa4b9ff8bc3dd48e2388 192.168.106.132:7005
slots: (0 slots) slave
replicates 01e9cd67978b1cad73a40e9a70000a236744cb17
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

若出现如下报错信息：./redis-trib.rb:885:in 'sort!' : undefined method '<=>' for:m: symbol (NoMethodError)

或出现其它的一些问题，可以参考博主另一篇博客：搭建redis集群的过程中遇到的问题