05.`Ubuntu18.04`下`docker-compose

1. 部署三主三从

1. 编辑redis.conf文件，并复制5份

   1. 创建 6 个文件夹

      mkdir -p redis-cluster-mode/redis/
      
      cd redis-cluster-mode/redis/
      
      mkdir -p master1/conf/ master2/ master3/ slave1/ slave2/ slave3/
      

   2. 获取redis.conf配置文件

      
      cd master1/conf/
      
      wget http://download.redis.io/redis-stable/redis.conf
      

   3. 修改配置文件

      1. vim redis.conf

      2. 命令模式下命令输入那里/关键字可以快速查找

         • 命令模式下u撤销
         • 命令模式下Ctrl + r回复被撤销的操作

      3. 注释掉bind 127.0.0.1

      4. # requirepass foobared撤销注释，并修改密码，6个redis密码要一致

      5. # masterauth <master-password>撤销注释，并将<master-password>改为设置的密码。开启验证

      6. # cluster-enabled yes撤销注释，开启集群模式

      7. # cluster-config-file nodes-6379.conf撤销注释，nodes-6379.conf是集群信息的记录文件

   4. 复制文件

      # 返回到 master1 同级目录
      cd ../../
      
      # 复制
      cp -rf master1/conf/ master2/
      
      cp -rf master1/conf/ master3/
      
      cp -rf master1/conf/ slave1/
      
      cp -rf master1/conf/ slave2/
      
      cp -rf master1/conf/ slave3/
      

2. 编辑docker-compose.yml文件

   1. 回到reids/同级目录

      cd ../
      

   2. vim docker-compose.yml

      version: "3.7"
      services:
        redis-master-1:
          image: redis
          volumes:
            - ./redis/master1/conf/redis.conf:/etc/redis/redis.conf
            - ./redis/master1/conf/nodes-6379.conf:/etc/redis/nodes-6379.conf
          ports: 
            - 6381:6379
          command: ['redis-server', '/etc/redis/redis.conf']
                
        redis-master-2:
          image: redis
          volumes:
            - ./redis/master2/conf/redis.conf:/etc/redis/redis.conf
            - ./redis/master2/conf/nodes-6379.conf:/etc/redis/nodes-6379.conf
          ports: 
            - 6382:6379
          command: ['redis-server', '/etc/redis/redis.conf']
             
        redis-master-3:
          image: redis
          volumes:
            - ./redis/master3/conf/redis.conf:/etc/redis/redis.conf
            - ./redis/master3/conf/nodes-6379.conf:/etc/redis/nodes-6379.conf
          ports: 
            - 6383:6379
          command: ['redis-server', '/etc/redis/redis.conf']
        
        redis-slave-1:
          image: redis
          volumes:
            - ./redis/slave1/conf/redis.conf:/etc/redis/redis.conf
            - ./redis/slave1/conf/nodes-6379.conf:/etc/redis/nodes-6379.conf
          ports: 
            - 6384:6379
          command: ['redis-server', '/etc/redis/redis.conf']
          
        redis-slave-2:
          image: redis
          volumes:
            - ./redis/slave2/conf/redis.conf:/etc/redis/redis.conf
            - ./redis/slave2/conf/nodes-6379.conf:/etc/redis/nodes-6379.conf
          ports: 
            - 6385:6379
          command: ['redis-server', '/etc/redis/redis.conf']
          
        redis-slave-3:
          image: redis
          volumes:
            - ./redis/slave3/conf/redis.conf:/etc/redis/redis.conf
            - ./redis/slave3/conf/nodes-6379.conf:/etc/redis/nodes-6379.conf
          ports: 
            - 6386:6379
          command: ['redis-server', '/etc/redis/redis.conf']       
      

   3. docker-compose up -d

   4. 查看容器是否启动成功

      docker ps -a
      

   5. 查看redis容器的ip

      # 这是查看的公式，将docker ps -a 查看到的 6 个的 <CONTAINER ID> 代进去
      # 根据设置的端口号 6881 - 6886 来进行查看，方便后续排序，设置主从
      docker inspect <CONTAINER ID> | grep IPA
      

   6. 进入其中一个容器

      docker exec -it <CONTAINER ID> /bin/bash
      

   7. 开启redis

      redis-cli -a <密码>
      

   8. 将其中其他的redis加入集群

      cluster meet ip 6379
      

   9. 查看集群节点

      cluster nodes
      
      # 退出 redis
      exit
      

   10. 配置三主三从

       redis-cli --cluster create <6个redis的 ip:端口> -a <密码> --cluster-replicas 1