使用redis-cli部署集群

目标

• 使用3台服务器A、B、C，每台服务器部署一套主从（1主2从），三个主服务来平分redis槽。

安装redis服务

• 安装gcc                yum install -y gcc
• 安装wget               yum install -y wget 
• 下载redis包           wget http://download.redis.io/releases/redis-5.0.8.tar.gz
• 解压并安装redis命令      cd  $REDIS_HOME/src && make
• 安装redis服务      make install PREFIX=/opt/redis
• 添加redis环境变量   

vi /etc/profile
export REDIS_HOME=/opt/redis
export PATH=$PATH:$REDIS_HOME/bin
source /etc/profile

 

• 使用utils路径下的 install_server.sh安装3个端口配置文件,下面以6379为例

• [root@node01 utils]# pwd
  /home/redis-5.0.8/utils
  [root@node01 utils]# sh install_server.sh 
  Welcome to the redis service installer
  This script will help you easily set up a running redis server
  
  Please select the redis port for this instance: [6379] 
  Selecting default: 6379
  Please select the redis config file name [/etc/redis/6379.conf] 
  Selected default - /etc/redis/6379.conf
  Please select the redis log file name [/var/log/redis_6379.log] 
  Selected default - /var/log/redis_6379.log
  Please select the data directory for this instance [/var/lib/redis/6379] 
  Selected default - /var/lib/redis/6379
  Please select the redis executable path [/opt/redis/bin/redis-server] 
  Selected config:
  Port           : 6379
  Config file    : /etc/redis/6379.conf
  Log file       : /var/log/redis_6379.log
  Data dir       : /var/lib/redis/6379
  Executable     : /opt/redis/bin/redis-server
  Cli Executable : /opt/redis/bin/redis-cli
  Is this ok? Then press ENTER to go on or Ctrl-C to abort.
  Copied /tmp/6379.conf => /etc/init.d/redis_6379
  Installing service...
  Successfully added to chkconfig!
  Successfully added to runlevels 345!
  Starting Redis server...
  Installation successful!
  

• 自行安装三个端口以后分别修改配置文件，其中cluster-config-file 需要区分开

• #打开集群模式
  cluster-enabled yes
  #集群配置文件
  cluster-config-file nodes_6379.conf
  #集群节点超时时间
  cluster-node-timeout 5000
  #允许其他服务器连接
  protected-mode no
  #如果需要添加连接白名单的话,默认关联本机，这里为了测试方便把他注释
  #bind 127.0.0.1
  #打开aof持久化模式
  appendonly yes

•  
• 三个配置都修改完以后，以同样的方式再添加B,C两台配置作为集群备用
• 开始部署集群。
• 第一步 启动三个服务器的 实例

• [root@node01 redis]# redis-server /etc/redis/6379.conf 
  [root@node01 redis]# redis-server /etc/redis/6380.conf 
  [root@node01 redis]# redis-server /etc/redis/6381.conf
  [root@node02 create-cluster]# redis-server /etc/redis/6382.conf 
  [root@node02 create-cluster]# redis-server /etc/redis/6383.conf 
  [root@node02 create-cluster]# redis-server /etc/redis/6384.conf 
  [root@node03 redis]# redis-server /etc/redis/6385.conf 
  [root@node03 redis]# redis-server /etc/redis/6386.conf 
  [root@node03 redis]# redis-server /etc/redis/6387.conf 
  

   

• 第二步 使用redic-cli部署集群

• redis-cli --cluster create 192.168.25.66:6379 192.168.25.66:6380 192.168.25.66:6381 192.168.25.67:6382 192.168.25.67:6383 192.168.25.67:6384 192.168.25.68:6385 192.168.25.68:6386 192.168.25.68:6387 --cluster-replicas 2
  

   

• 查看集群状态

[root@node02 create-cluster]# redis-cli --cluster info 192.168.25.66:6379
192.168.25.66:6379 (5037dd57...) -> 0 keys | 5461 slots | 2 slaves.
192.168.25.68:6385 (b58897ae...) -> 0 keys | 5461 slots | 2 slaves.
192.168.25.67:6382 (ea76244b...) -> 0 keys | 5462 slots | 2 slaves.
[OK] 0 keys in 3 masters.
0.00 keys per slot on average.

• 查看集群结构

• [root@node02 create-cluster]# redis-cli --cluster check 192.168.25.66:6379
  192.168.25.66:6379 (5037dd57...) -> 0 keys | 5461 slots | 2 slaves.
  192.168.25.68:6385 (b58897ae...) -> 0 keys | 5461 slots | 2 slaves.
  192.168.25.67:6382 (ea76244b...) -> 0 keys | 5462 slots | 2 slaves.
  [OK] 0 keys in 3 masters.
  0.00 keys per slot on average.
  >>> Performing Cluster Check (using node 192.168.25.66:6379)
  M: 5037dd57380dc70776b8fb7ad67d6a1b029957e5 192.168.25.66:6379
     slots:[0-5460] (5461 slots) master
     2 additional replica(s)
  M: b58897ae1de663edba1f3d262ff416f0fdba2346 192.168.25.68:6385
     slots:[10923-16383] (5461 slots) master
     2 additional replica(s)
  S: cca6d3f83c1ddfa120f9cfc5fce9327abc175fb3 192.168.25.67:6384
     slots: (0 slots) slave
     replicates b58897ae1de663edba1f3d262ff416f0fdba2346
  S: f71218b1ba884a65c083db3b4ec30888778212c2 192.168.25.68:6387
     slots: (0 slots) slave
     replicates ea76244b226257b9ea893aa82ac203d656afe84f
  S: 60e740c4c5d7b15e7ebaf573122f71f46aa6cb42 192.168.25.66:6381
     slots: (0 slots) slave
     replicates ea76244b226257b9ea893aa82ac203d656afe84f
  M: ea76244b226257b9ea893aa82ac203d656afe84f 192.168.25.67:6382
     slots:[5461-10922] (5462 slots) master
     2 additional replica(s)
  S: 8501a8d0767b7466ac17e0f75bf36f2e244686e8 192.168.25.67:6383
     slots: (0 slots) slave
     replicates 5037dd57380dc70776b8fb7ad67d6a1b029957e5
  S: fd1d61efcfcd12810e73d3f735dc11ca0f764c14 192.168.25.68:6386
     slots: (0 slots) slave
     replicates 5037dd57380dc70776b8fb7ad67d6a1b029957e5
  S: 38ea4787e22d007b609ee2523597ac6887f3e22a 192.168.25.66:6380
     slots: (0 slots) slave
     replicates b58897ae1de663edba1f3d262ff416f0fdba2346
  [OK] All nodes agree about slots configuration.
  >>> Check for open slots...
  >>> Check slots coverage...
  [OK] All 16384 slots covered.

   

部署方式 2  使用create-cluster脚本

•  进入任意一台REDIS_HOME/src/utils/create-cluster目录，查看README。

• 使用：
  1.第一步，编辑create-cluster脚本，修改启用和结束的端口范围，这个依赖于你要创建的实例。也可以创建一个config.sh脚本 通过-a config.sh来指定端口范围，这样可以保留脚本的初始属性。
  2.使用./create-cluster start来启动实例
  3.使用./create-cluster create来执行,也可以redis-cli --cluster create,这样来创建一个redis集群
  4.每个实例的AOF文件和日志将会再当前目录创建。
  
  停止：
  1.使用./create-cluster stop来停止所有的实例，停止后可以使用./create-cluster start来重启
  2.使用./create-cluster clean来溢出所有的AOF文件和日志.
  帮助文档 ./create-cluster help
  
  

   

• 创建脚本config.sh

• #!/bin/bash
  
  # Settings
  
  PORT=6378
  TIMEOUT=2000
  NODES=9
  REPLICAS=2