一.搭建redis集群

1.拉取redis镜像

  docker pull redis

2.创建网络

docker network create consul_consul

3.创建redis数据文件存储路径

mkdir -p /root/distributed/redis/data/master
mkdir -p /root/distributed/redis/data/slave1
mkdir -p /root/distributed/redis/data/slave2

4.创建redis compose文件

mkdir -p  /root/distributed/redis
cd  /root/distributed/redis
touch  docker-compose.yml 

5.配置docker-compsoe.yml文件

version: '3'
networks:
  consul_consul:
    external: true
services:
  redis-master:
    image: redis:latest
    container_name: redis-master
    restart: always
    environment:
      TZ: Asia/Shanghai
    networks:
      - consul_consul
    ports:
      - "6379:6379"
    volumes:
      - ./data/master:/data
    command: redis-server --port 6379  --requirepass g3nt00567  --appendonly yes
  redis-slave1:
    image: redis:latest
    command: redis-server --slaveof redis-master 6379 --port 6380 --requirepass g3nt00567 --masterauth g3nt00567  --appendonly yes
    restart: always
    networks:
      - consul_consul
    ports:
      - "6380:6380"
    environment:
      TZ: Asia/Shanghai
    volumes:
      - ./data/slave1:/data
    #ilinks:
    #  - redis-master
  redis-slave2:
    image: redis:latest    
    command: redis-server --slaveof redis-master 6379 --port 6381 --requirepass g3nt00567 --masterauth g3nt00567  --appendonly yes
    restart: always
    networks:
      - consul_consul
    ports:
      - "6381:6381"
    environment:
      TZ: Asia/Shanghai
    volumes:
      - ./data/slave2:/data
    #ilinks:
    #  - redis-master

二.搭建sentinel哨兵

1.建立sentinel文件夹

mkdir -p /root/distributed/redis/sentinel
cd  /root/distributed/redis/sentinel

2.创建sentienl.conf文件

touch sentinel1.conf

3.配置sentienl1.conf

port 26379
dir "/tmp"
# 自定义集群名，其中 192.168.8.188 为 redis-master 的 ip，6379 为 redis-master 的端口，2 为最小投票数（因为有 3 台 Sentinel 所以可以设置成 2）
sentinel myid 41e24abf1a9b8c509d636678170251febf44036a
sentinel deny-scripts-reconfig yes
sentinel monitor mymaster 192.168.48.9 6381 2
sentinel auth-pass mymaster g3nt00567
sentinel config-epoch mymaster 1
sentinel leader-epoch mymaster 1
# Generated by CONFIG REWRITE
sentinel known-replica mymaster 192.168.48.7 6379
sentinel known-replica mymaster 192.168.48.8 6380
sentinel known-sentinel mymaster 192.168.48.11 26379 e480267c29f2c27a10a1fe8587a458b58719d719
sentinel known-sentinel mymaster 192.168.48.10 26379 34bac34cbac31e673b53dba146d50ea48b03334e
sentinel current-epoch 1

4.复制sentinel1.conf文件

cp /root/distributed/redis/sentinel1.conf sentinel2.conf 
cp /root/distributed/redis/sentinel1.conf sentinel3.conf 

5.创建docker-compose.yml

touch docker-compose.yml

6.配置docker-compose.yml文件

version: '3'
networks:
  consul_consul:
    external: true
services:
  sentinel1:
    image: redis
    container_name: redis-sentinel-1
    command: redis-sentinel /usr/local/etc/redis/sentinel.conf
    restart: always
    ports:
      - 26379:26379
    volumes:
      - ./sentinel1.conf:/usr/local/etc/redis/sentinel.conf
    networks:
      - consul_consul
  sentinel2:
    image: redis
    container_name: redis-sentinel-2
    command: redis-sentinel /usr/local/etc/redis/sentinel.conf
    restart: always
    ports:
      - 26380:26379
    volumes:
      - ./sentinel2.conf:/usr/local/etc/redis/sentinel.conf
    networks:
      - consul_consul
  sentinel3:
    image: redis
    container_name: redis-sentinel-3
    command: redis-sentinel /usr/local/etc/redis/sentinel.conf
    restart: always
    ports:
      - 26381:26379
    volumes:
      - ./sentinel3.conf:/usr/local/etc/redis/sentinel.conf
    networks:
      - consul_consul

三.检测redis集群是否生效

3.启动redis-sentinel

docker-compose up -d

4.查看redis-sentinel是否启动成功

进入redis-sentinel容器中,查看redis连接状态

docker ``exec` `-it 容器Id ``bash``<br>redis-cli -p 26379

执行如下命令,查看redis主信息

sentinel master mymaster

显示带红框的信息则表明成功

image

执行如下命令,查看从redis信息是否正常

sentinel slaves mymaster

显示如下表明正常

image

四.测试主redis挂了之后,哨兵能否正常选举redis

使用如下命令,停掉主redis. [停掉容器也可以使用容器对应的NAMES来停掉]

docker stop redis-master

显示红框则表明redis已经停了

image

查看redis-sentinel日志,看其将那个redis选举为主,如下,其将端口位6381的redis选举为主

image

测试端口号为6381的redis是否具备写功能,如下则表明成功

image

至此,redis一主二从三哨兵模式部署成功.