docker搭建redis集群

背景

redis作为缓存，生产中都是使用集群部署，故开发的时候自己搞了个乞丐版集群。

Docker version 25.0.4

Docker Compose version v2.24.7

redis 7.0

目录结构

project-directory/

├── docker-compose.yml

├── config/

│ ├── redis-node-1.conf

│ ├── redis-node-2.conf

│ └── redis-node-3.conf

└── data/

├── redis-node-1/

├── redis-node-2/

└── redis-node-3/

准备redis配置文件

mkdir -p /data/redis
cd /data/redis

xml 复制代码

vi config/redis-node-1.conf

port 7000
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes
bind 0.0.0.0
protected-mode no
#requirepass yourpassword

xml 复制代码

vi config/redis-node-2.conf

port 7001
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes
bind 0.0.0.0
protected-mode no
#requirepass yourpassword

xml 复制代码

vi config/redis-node-3.conf

port 7002
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes
bind 0.0.0.0
protected-mode no
#requirepass yourpassword

准备 docker-compose.yml 配置文件

xml 复制代码

version: "3.9"
services:
  redis-node-1:
    image: redis:7.0
    container_name: redis-node-1
    command: ["redis-server", "/usr/local/etc/redis/redis.conf", "--cluster-enabled", "yes", "--cluster-config-file", "nodes.conf", "--cluster-node-timeout", "5000", "--appendonly", "yes"]
    ports:
      - "7000:7000"
    volumes:
      - ./data/redis-node-1:/data
      - ./config/redis-node-1.conf:/usr/local/etc/redis/redis.conf
    networks:
      - redis-cluster-network

  redis-node-2:
    image: redis:7.0
    container_name: redis-node-2
    command: ["redis-server", "/usr/local/etc/redis/redis.conf", "--cluster-enabled", "yes", "--cluster-config-file", "nodes.conf", "--cluster-node-timeout", "5000", "--appendonly", "yes"]
    ports:
      - "7001:7001"
    volumes:
      - ./data/redis-node-2:/data
      - ./config/redis-node-2.conf:/usr/local/etc/redis/redis.conf
    networks:
      - redis-cluster-network

  redis-node-3:
    image: redis:7.0
    container_name: redis-node-3
    command: ["redis-server", "/usr/local/etc/redis/redis.conf", "--cluster-enabled", "yes", "--cluster-config-file", "nodes.conf", "--cluster-node-timeout", "5000", "--appendonly", "yes"]
    ports:
      - "7002:7002"
    volumes:
      - ./data/redis-node-3:/data
      - ./config/redis-node-3.conf:/usr/local/etc/redis/redis.conf
    networks:
      - redis-cluster-network

networks:
  redis-cluster-network:
    driver: bridge

拉取镜像并启动redis

docker-compose up -d

查看redis容器

docker ps | grep redis

查看每个容器的IP地址

docker inspect redis-node-1 | grep IPAddress

同理：将其他容器的IP一一查出。

创建集群

docker exec -it redis-node-1 redis-cli --cluster create \ 172.19.0.3:7000 172.19.0.2:7001 172.19.0.4:7002 \ --cluster-replicas 0

这里的IP就是上一步查出的，要注意对应容器IP和端口要写对，要和docker-compose.yml配置的内容对上。
这里没有从节点，如果你想添加从节点，语法如下：

docker exec -it redis-node-1 redis-cli --cluster create

<主节点IP>:7000 <主节点IP>:7001 <主节点IP>:7002

<从节点IP>:7003 <从节点IP>:7004 <从节点IP>:7005

--cluster-replicas 1

测试redis

进入容器并登录redis
docker exec -it redis-node-1 redis-cli -c -p 7000

查看集群信息
cluster nodes
cluster info

关闭集群

docker-compose stop

开启集群

docker-compose start