05.`Ubuntu18.04`下`docker-compose`实现`redis`集群模式_ubuntu compose redis 三主-优快云博客

本文详细介绍了如何部署一个由三个主节点和三个从节点组成的Redis集群，包括配置文件的编辑、Docker容器的使用、集群的创建及主从配置等关键步骤。

1. 部署`三主三从`

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/
```

编辑docker-compose.yml文件

回到reids/同级目录
```
cd ../
```

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']

docker-compose up -d
查看容器是否启动成功
```
docker ps -a
```

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

进入其中一个容器

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

开启redis
```
redis-cli -a <密码>
```
将其中其他的redis加入集群
```
cluster meet ip 6379
```
查看集群节点
```
cluster nodes

# 退出 redis
exit
```

配置三主三从

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

05.`Ubuntu18.04`下`docker-compose`实现`redis`集群模式

1. 部署三主三从

1. 部署`三主三从`