Redis Cluster 搭建

安装 Redis5.0.7

http://download.redis.io/releases/redis-5.0.7.tar.gz
tar xzf redis-5.0.7.tar.gz
cd redis-5.0.7
make
make install

参数配置

port  70xx                                      # 指定端口
bind  127.0.0.1                            # 指定物理接口 ip 地址
cluster-enabled yes                        # 搭建 redis 集群必须开启
daemonize yes                              # 后台运行
pidfile /var/run/redis_70xx.pid            # 节点间配置不可相同
cluster-config-file   nodes-70xx.conf      # 节点间配置不可相同
cluster-node-timeout 5000                  # 节点间通信超时时间

启动 Redis 服务

sudo redis-server conf/redis-7000.conf
sudo redis-server conf/redis-7001.conf
sudo redis-server conf/redis-7002.conf
sudo redis-server conf/redis-7003.conf
sudo redis-server conf/redis-7004.conf
sudo redis-server conf/redis-7005.conf

使用 redis-cli 初始化 Redis Cluster

按照从主到从的方式从左到右依次排列6个Redis节点。

中途会需要输入yes

redis-cli --cluster create 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 --cluster-replicas 1

搭建成功

[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

测试

redis-cli -c -h 127.0.0.1 -p 7000

显示节点信息

cluster nodes

各节点信息

7407745d8070e96d7379e699b07f0bca88982be1 127.0.0.1:7001@17001 master - 0 1570968932522 2 connected 5461-10922
ba29160843481925a592c4bb50aec8c394e1f458 127.0.0.1:7000@17000 myself,master - 0 1570968930000 1 connected 0-5460
5b6c91dd6872314cf9e90fdca716e1c65a36674c 127.0.0.1:7004@17004 slave 415273835d288ecc0b40011672a83ee607eceeda 0 1570968931615 5 connected
ae66949b57bb87545d1a03cf4dbfa61cc49ffb87 127.0.0.1:7005@17005 slave ba29160843481925a592c4bb50aec8c394e1f458 0 1570968932623 6 connected
415273835d288ecc0b40011672a83ee607eceeda 127.0.0.1:7002@17002 master - 0 1570968932522 3 connected 10923-16383
e528efbe0459fea7f48eac2e1f5547005f975cc6 127.0.0.1:7003@17003 slave 7407745d8070e96d7379e699b07f0bca88982be1 0 1570968931514 4 connected

安装 Redis4.0.14

wget http://download.redis.io/releases/redis-4.0.14.tar.gz
tar xzf redis-4.0.14.tar.gz
cd redis-4.0.14
make
make install

使用 redis-trib.rb 初始化 Redis Cluster

Redis3或4需使用redis-trib.rb搭建Redis Cluster，但redis-trib.rb需安装ruby才能使用。

安装 rubygems

CentOS

sudo yum -y install ruby rubygems

Ubuntu

sudo apt-get -y install ruby rubygems

安装 redis-trib.rb 的依赖包

gem install redis

若安装出错

[root@root ~]# gem install redis
ERROR:  Error installing redis:
    redis requires Ruby version >= 2.3.0.

查看Ruby版本

ruby -v

安装ruby2.4版本

sudo yum remove ruby
wget https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.2.tar.gz
tar -zxvf ruby-2.4.2.tar.gz
cd ruby-2.4.2
./configure
make && make install
sudo ln -s ruby /usr/bin/ruby

gem安装后不知道文件在哪个目录

gem environment

用户安装目录：/usr/local/lib/ruby/gems/2.4.0

RubyGems Environment:
  - RUBYGEMS VERSION: 2.6.13
  - RUBY VERSION: 2.4.2 (2017-09-14 patchlevel 198) [x86_64-linux]
  - INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/2.4.0
  - USER INSTALLATION DIRECTORY: /root/.gem/ruby/2.4.0
  - RUBY EXECUTABLE: /usr/local/bin/ruby
  - EXECUTABLE DIRECTORY: /usr/local/bin
  - SPEC CACHE DIRECTORY: /root/.gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: /usr/local/etc
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /usr/local/lib/ruby/gems/2.4.0
     - /root/.gem/ruby/2.4.0
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - https://rubygems.org/
  - SHELL PATH:
     - /usr/local/sbin
     - /usr/local/bin
     - /sbin
     - /bin
     - /usr/sbin
     - /usr/bin
     - /root/bin

参数配置

port  70xx                                      # 指定端口
bind  127.0.0.1                            # 指定物理接口 ip 地址
cluster-enabled yes                        # 搭建 redis 集群必须开启
daemonize yes                              # 后台运行
pidfile /var/run/redis_70xx.pid            # 节点间配置不可相同
cluster-config-file   nodes-70xx.conf      # 节点间配置不可相同
cluster-node-timeout 5000                  # 节点间通信超时时间

启动 Redis 服务

sudo redis-server conf/redis-7000.conf
sudo redis-server conf/redis-7001.conf
sudo redis-server conf/redis-7002.conf
sudo redis-server conf/redis-7003.conf
sudo redis-server conf/redis-7004.conf
sudo redis-server conf/redis-7005.conf

配置集群

按照从主到从的方式从左到右依次排列6个Redis节点。

• 中途会需要输入yes
• --replicas 1表示给每一个master配置一个slave
• 成功后的效果如5.0以上版本创建的效果以及使用的命令均一致

redis-trib.rb create --replicas 1 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005

参考

https://redis.io/topics/cluster-tutorial