9、ubuntu docker-compose 安装redis集群

1、创建映射需要的目录

mkdir -p /docker/redis/{sentinel,data}

2、权限设置

chmod -R 777 /docker/redis/

3、创建网络环境

docker network create --driver=bridge --subnet=172.21.0.0/16  redisnetwork

4、redis 的docker-compose.yml 一主两从

cat > /docker/redis/docker-compose.yml  <

version: '3.3'

services:

  master:

    image: redis

    container_name: redis-master

    command: redis-server --requirepass admin@admin

    ports:

      - 6379:6379

    restart: always

    networks:

      - redisnetwork

    volumes:

      - /docker/redis/data:/data

  slave1:

    image: redis

    container_name: redis-slave-1

    ports:

      - 6380:6379

    command: redis-server --slaveof redis-master 6379  --port 6380 --requirepass admin@admin  --masterauth admin@admin

    restart: always

    networks:

      - redisnetwork

    volumes:

      - /docker/redis/data:/data

    #command: redis-server --slaveof redis-master 6379

  slave2:

    image: redis

    container_name: redis-slave-2

    ports:

      - 6381:6379

    command: redis-server --slaveof redis-master 6379  --port 6381  --requirepass admin@admin  --masterauth admin@admin

    restart: always

    networks:

      - redisnetwork

    volumes:

      - /docker/redis/data:/data

    #command: redis-server --slaveof redis-master 6379

networks:

  redisnetwork:

    external: true

END

5、编写 redis-sentinel docker-compose.yml 

cat > /docker/redis/sentinel/docker-compose.yml  <

version: '3.3'

services:

  sentinel1:

    image: redis

    container_name: redis-sentinel-1

    networks:

      - redisnetwork

    ports:

      - 26379:26379

    command: redis-sentinel /usr/local/etc/redis/sentinel.conf

    volumes:

      - /docker/redis/sentinel/sentinel1.conf:/usr/local/etc/redis/sentinel.conf

  sentinel2:

    image: redis

    container_name: redis-sentinel-2

    networks:

      - redisnetwork

    ports:

      - 26380:26379

    command: redis-sentinel /usr/local/etc/redis/sentinel.conf

    volumes:

      - /docker/redis/sentinel/sentinel2.conf:/usr/local/etc/redis/sentinel.conf

  sentinel3:

    image: redis

    container_name: redis-sentinel-3

    networks:

      - redisnetwork

    ports:

      - 26381:26379

    command: redis-sentinel /usr/local/etc/redis/sentinel.conf

    volumes:

      - /docker/redis/sentinel/sentinel3.conf:/usr/local/etc/redis/sentinel.conf

networks:

  redisnetwork:

    external: true

END

6、编写配置文件

cat > /docker/redis/sentinel/sentinel.conf  <

port 26379

dir /tmp

sentinel monitor mymaster redis-master 6379 2

sentinel down-after-milliseconds mymaster 30000

sentinel parallel-syncs mymaster 1

sentinel auth-pass mymaster admin@admin

sentinel failover-timeout mymaster 180000

sentinel deny-scripts-reconfig yes

END

7、复制配置文件为三份

cp /docker/redis/sentinel/sentinel.conf /docker/redis/sentinel/sentinel1.conf

cp /docker/redis/sentinel/sentinel.conf /docker/redis/sentinel/sentinel2.conf

cp /docker/redis/sentinel/sentinel.conf /docker/redis/sentinel/sentinel3.conf

7、启动redis

cd /docker/redis/     

docker-compose up -d

8、启动sentinel

cd ./sentinel/

docker-compose up -d

9、查看主节点和从节点

docker exec -it redis-sentinel-3 bash  进入哨兵节点

redis-cli -p 26379  查看是否有主节点

sentinel master mymaster

10、测试主从

docker exec -it redis-master bash   #进入redis 主节点

redis-cli    #使用redis命令行

auth admin@admin   #授权

set testkey testvalue   #设置key value  分别为testkey，testvalue

get testkey                #获取testkey 可以获取到testvalue

exit  #退出命令行

exit  #退出 容器

docker exec -it redis-slave-1 bash 进入从节点

redis-cli -p 6380 #进入从节点命令行，记得加端口

auth admin@admin   #授权

get testkey                #获取testkey 可以获取到testvalue 证明主从没问题

11、测试哨兵

docker exec -it redis-sentinel-1 bash  #进入哨兵容器

redis-cli -p 26379    #使用命令行

sentinel master mymaster   #查看主信息如下为正常

正常

sentinel slaves mymaster   #查看从信息如下为正常

正常

11、测试主库挂了之后，哨兵是否正常选举

docker stop redis-master  #停掉主库

docker ps -a   #加上-a查看容器可以看到下面的挂掉了

标红挂掉

docker logs redis-sentinel-1   查看哨兵日志，发现重新选择了主库

红色为选举出来的

一主两从三哨兵配置完成