Docker-Compose如何搭建Redis集群

1. 集群配置

• 3主+3从

• 由于仅用于测试，故我这里只用1台服务器进行模拟

redis列表

2.编写redis.conf

在server上创建一个目录用于存放redis集群部署文件。这里我放的路径为/root/redis-cluster

在/opt/docker/redis-cluster目录下创建redis-1,redis-2,redis-3,redis-4,redis-5,redis-6文件夹

mkdir -p /opt/docker/redis-cluster/{redis-1,redis-2,redis-3,redis-4,redis-5,redis-6}
 
#创建持久化目录
mkdir -p /opt/docker/redis-cluster/redis-1/data
mkdir -p /opt/docker/redis-cluster/redis-2/data
mkdir -p /opt/docker/redis-cluster/redis-3/data
mkdir -p /opt/docker/redis-cluster/redis-4/data
mkdir -p /opt/docker/redis-cluster/redis-5/data
mkdir -p /opt/docker/redis-cluster/redis-6/data

3. 在每个redis-*文件夹下创建redis.conf文件，并写入如下内容:

cluster-enabled yes # 开启集群
cluster-config-file nodes.conf # 集群配置文件
cluster-node-timeout 5000 # 集群节点多少时间未响应视为该节点丢失
appendonly yes
port 6379 # redis监听端口
masterauth passwd123  #设置master节点密码
requirepass passwd123 #设置密码

注意：port值不能都为6379，根据上面redis列表设置的端口号，依次给redis-1 ~ redis-6设置6379~6384端口号

4.编写docker-compose.yml文件

这里直接使用daocloud提供的redis镜像地址daocloud.io/library/redis:6.0.4

在/root/redis-cluster文件夹下创建docker-compose.yml文件。

docker-compose.yml文件内容如下：

version: '3.1'
services:
  # redis1配置
  redis1:
    image: daocloud.io/library/redis:6.0.4
    container_name: redis-1
    restart: always
    network_mode: "host"
    volumes:
      - /opt/docker/redis-cluster/redis-1/data:/data
      - /opt/docker/redis-cluster/redis-1/redis.conf:/usr/local/etc/redis/redis.conf
    command: ["redis-server", "/usr/local/etc/redis/redis.conf"]
  # redis2配置
  redis2:
    image: daocloud.io/library/redis:6.0.4
    container_name: redis-2
    restart: always
    network_mode: "host"
    volumes:
      - /opt/docker/redis-cluster/redis-2/data:/data
      - /opt/docker/redis-cluster/redis-2/redis.conf:/usr/local/etc/redis/redis.conf
    command: ["redis-server", "/usr/local/etc/redis/redis.conf"]
  # redis3配置
  redis3:
    image: daocloud.io/library/redis:6.0.4
    container_name: redis-3
    restart: always
    network_mode: "host"
    volumes:
      - /opt/docker/redis-cluster/redis-3/data:/data
      - /opt/docker/redis-cluster/redis-3/redis.conf:/usr/local/etc/redis/redis.conf
    command: ["redis-server", "/usr/local/etc/redis/redis.conf"]
  # redis4配置
  redis4:
    image: daocloud.io/library/redis:6.0.4
    container_name: redis-4
    restart: always
    network_mode: "host"
    volumes:
      - /opt/docker/redis-cluster/redis-4/data:/data
      - /opt/docker/redis-cluster/redis-4/redis.conf:/usr/local/etc/redis/redis.conf
    command: ["redis-server", "/usr/local/etc/redis/redis.conf"]
  # redis5配置
  redis5:
    image: daocloud.io/library/redis:6.0.4
    container_name: redis-5
    restart: always
    network_mode: "host"
    volumes:
      - /opt/docker/redis-cluster/redis-5/data:/data
      - /opt/docker/redis-cluster/redis-5/redis.conf:/usr/local/etc/redis/redis.conf
    command: ["redis-server", "/usr/local/etc/redis/redis.conf"]
  # redis6配置
  redis6:
    image: daocloud.io/library/redis:6.0.4
    container_name: redis-6
    restart: always
    network_mode: "host"
    volumes:
      - /opt/docker/redis-cluster/redis-6/data:/data
      - /opt/docker/redis-cluster/redis-6/redis.conf:/usr/local/etc/redis/redis.conf
    command: ["redis-server", "/usr/local/etc/redis/redis.conf"]

启动容器,执行命令:

#启动容器
docker-compose -f xxx.yaml up -d

5.开启集群

随便找一个容器进入，这里我选择redis-1进入。 在进入容器后，输入如下命令开启集群:

redis-cli --cluster create 192.168.66.180:6379 \
192.168.66.180:6380 \
192.168.66.180:6381 \
192.168.66.180:6382 \
192.168.66.180:6383 \
192.168.66.180:6384 \
--cluster-replicas 1

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出现下图即为成功。

6.测试

使用redis-cli命令，连接集群中任意节点。我随便在一台能够ping通集群所在IP的电脑上进行了测试，这里我使用了本机

6.1 查看节点属性

redis-cli -c -h 192.168.66.180 -p 6379
192.168.66.180:6379> cluster info

显示为如下图，即为集群健康状态

6.2 查看节点信息

cluster nodes

注意看图中的slave,master,myself等关键字。

6.3 插入一个值

192.168.66.180:6379> set test 'hello world'
-> Redirected to slot [6918] located at 192.168.66.180:6380
OK
192.168.66.180:6380>

注意：这里根据切片自动切换到了该数据分片所在的节点上，所以下面可以看到连接的节点变为了192.168.1.4:6380

get test

168.66.180:6379> set test 'hello world'
-> Redirected to slot [6918] located at 192.168.66.180:6380
OK
192.168.66.180:6380> get test
"hello world"
192.168.66.180:6380>

这里因为就是在该数据所在分片上进行的查询，所以连接节点没有改变。

7.添加密码：

7.1 编辑redis.conf文件

#为redis.conf文件添加如下配置。这里设置密码为123456
masterauth 123456
requirepass 123456

7.2 编辑docker-compose.yml文件

#为docker-compose.yml中每个容器添加如下配置:
environment:
  - REDISCLI_AUTH=123456

7.3 连接集群

redis-cli -c -h 192.168.66.180 -p 6379 -a 123456