一、概要

   本次搭建redis叢集採用docker進行構建，採用哨兵模式防止叢集宕機

二、建立redis及sentinel目錄

   建立redis目錄： mkdir -pv /usr/local/docker/redis
   建立sentinel目錄：mksir -pv /usr/local/docker/sentinel

三、建立redis服務

1、進入redis目錄

    cd /usr/local/docker/redis

2、建立docker-compose檔案

   touch docker-compose.yml

3、編輯docker-compose檔案

    vim docker-compose.yml

4、將下面的資訊貼上到docker-compose.yml中，並儲存

version: '3.1'
services:
  master:
    image: redis:5.0.7
    container_name: redis-master
    restart: always
    ports:
      - 6377:6377
    command: redis-server --port 6377  --appendonly yes
    environment:
      TZ: Asia/Shanghai
    #network_mode: "host"

  slave1:
    image: redis:
 
5.0.7
    container_name: redis-slave-1
    restart: always
    ports:
      - 6380:6380
    command: redis-server  --slaveof 192.168.3.128 6377 --port 6380  --appendonly yes
    environment:
      TZ: Asia/Shanghai
    #network_mode: "host"

  slave2:
    image: redis:5.0.7
    container_name: redis-slave-2
    restart: always
    ports:
      
 
- 6381:6381
    command: redis-server  --slaveof 192.168.3.128 6377 --port 6381  --appendonly yes
    environment:
      TZ: Asia/Shanghai
    #network_mode: "host"

5、啟動redis叢集

   docker-compose up -d  

6、檢視叢集是否啟動成功

 docker ps

 如果啟動出現如下圖示識啟動成功

四、建立sentinel服務

1、進入sentinel目錄

   cd  /usr/local/docker/sentinel

2、建立docker-compose檔案

 touch docker-compose.yml

3、編輯docker-compose檔案

   vim docker-compose.yml

4、將下面的資訊貼上到docker-compose.yml中，並儲存

version: '3.1'
services:
  sentinel1:
    image: redis
    container_name: redis-sentinel-1
    ports:
      - 26379:26379
    command: redis-sentinel /home/Software/Docker/sentinel/sentinel.conf
    restart: always
    #network_mode: "host"
    volumes:
      - ./sentinel1.conf:/home/Software/Docker/sentinel/sentinel.conf

  sentinel2:
    image: redis
    container_name: redis-sentinel-2
    ports:
      - 26380:26379
    command: redis-sentinel /home/Software/Docker/sentinel/sentinel.conf
    restart: always
    #network_mode: "host"
    volumes:
      - ./sentinel2.conf:/home/Software/Docker/sentinel/sentinel.conf

  sentinel3:
    image: redis
    container_name: redis-sentinel-3
    ports:
      - 26381:26379
    command: redis-sentinel /home/Software/Docker/sentinel/sentinel.conf
    restart: always
    #network_mode: "host"
    volumes:
      - ./sentinel3.conf:/home/Software/Docker/sentinel/sentinel.conf

5、建立sentinel.conf檔案

   touch  /usr/local/docker/sentinel/sentinel.conf

6、編輯sentinel.conf檔案

  vim  /usr/local/docker/sentinel/sentinel.conf   

7、將下面的資訊貼上到sentinel.conf中，並儲存

    port 26379
    dir /tmp
    
    sentinel monitor mymaster 192.168.88.134 6379 2
    sentinel down-after-milliseconds mymaster 30000
    sentinel parallel-syncs mymaster 1
    sentinel failover-timeout mymaster 180000
    sentinel deny-scripts-reconfig yes

8、將剛剛建立的sentinel.conf在建立3份，一模一樣就可以了

    cp sentinel.conf sentinel1.conf
    cp sentinel.conf sentinel2.conf
    cp sentinel.conf sentinel3.conf

9、啟動sentinel服務

    docker-compose up -d

10、檢視叢集是否啟動成功

  docker ps

    如果啟動出現如下圖示識啟動成功

五、檢視進入哨兵節點，檢視是否有主節點

1、進入執行中的sentinel容器

    docker exec -it b1eb09f2700a bash 

2、連線到redis中

    redis-cli -p 26379

3、輸入如下命令“sentinel master mymaster”檢視叢集是否成功，如果出現下面資訊表示叢集搭建成功