使用Docker設定redis sentinel哨兵的方法步驟

2022-07-11 14:00:05

先說一下遇到的問題。我看網上說想設定哨兵，必須讓啟動redis的docker網路模式為host，否則無法存取到從還是什麼的。我指定--network host後無法外網存取，redis desktop manager連不上redis了，後來發現我這個新克隆的機器沒關防火牆，關上就好了。

1.設定主從

docker pull一下redis

master

mkdir -p /mydata/redis/6379/conf
mkdir -p /mydata/redis/6379/data
touch /mydata/redis/6379/conf/redis.conf
echo "appendonly yes"  >> /mydata/redis/6379/conf/redis.conf
docker run --network host --name redis6379 -v /mydata/redis/6379/data:/data -v /mydata/redis/6379/conf/redis.conf:/etc/redis/redis.conf -d redis redis-server /etc/redis/redis.conf --port 6379

slave

#slave1
mkdir -p /mydata/redis/6380/conf
mkdir -p /mydata/redis/6380/data
touch /mydata/redis/6380/conf/redis.conf
echo "appendonly yes"  >> /mydata/redis/6380/conf/redis.conf
docker run --network host --name redis6380 -v /mydata/redis/6380/data:/data -v /mydata/redis/6380/conf/redis.conf:/etc/redis/redis.conf -d redis redis-server /etc/redis/redis.conf --port 6380 --slaveof 192.168.243.4 6379

#slave2
mkdir -p /mydata/redis/6381/conf
mkdir -p /mydata/redis/6381/data
touch /mydata/redis/6381/conf/redis.conf
echo "appendonly yes"  >> /mydata/redis/6381/conf/redis.conf
docker run --network host --name redis6381 -v /mydata/redis/6381/data:/data -v /mydata/redis/6381/conf/redis.conf:/etc/redis/redis.conf -d redis redis-server /etc/redis/redis.conf --port 6381 --slaveof 192.168.243.4 6379

檢視設定：

#主
docker exec -it redis6379 redis-cli
>info replication
#從
docker exec -it redis6380 redis-cli -p 6380
>info replication

2. 設定哨兵

master

mkdir /mydata/redis/6379/sentinel
mkdir /mydata/redis/6379/sentinel/log
vi /mydata/redis/6379/sentinel/sentinel.conf
#輸入
port 26379
dir "/var/log/sentinel"
logfile "/var/log/sentinel/26379.log"
sentinel monitor mymaster 192.168.243.4 6379 1 #這裡暫時設定成1
                       ![在這裡插入圖片描述](https://img-blog.csdnimg.cn/9a303b239fec467385d2c8990cb3e629.png#pic_center)
                        #方便看一下主掛掉是什麼效果
sentinel down-after-milliseconds mymaster 5000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
#end
docker run -d --name sentinel26379 -v /mydata/redis/6379/sentinel/sentinel.conf:/conf/sentinel.conf -v /mydata/redis/6379/sentinel/log:/var/log/sentinel --network host redis redis-sentinel /conf/sentinel.conf

先進行測試：

docker exec -it redis6379 redis-cli
> SHUTDOWN
> exit
cat /mydata/redis/6379/sentinel/log/26379.log

此時redis6381已成為新的master

再啟動docker start redis6379 6379是slave了

測試成功，修改上面組態檔的sentinel monitor mymaster 192.168.243.4 6379 2 數位設定為2，代表至少有2個Sentinel節點認為主節點不可達，那麼這個不可達的判定才是客觀的。為了防止票數相同，sentinel啟動奇數個。

slave

#slave1
mkdir /mydata/redis/6380/sentinel
mkdir /mydata/redis/6380/sentinel/log
vi /mydata/redis/6380/sentinel/sentinel.conf
#輸入
port 26380
dir "/var/log/sentinel"
logfile "/var/log/sentinel/26380.log"
sentinel monitor mymaster 192.168.243.4 6380 2
sentinel down-after-milliseconds mymaster 5000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
#end
docker run -d --name sentinel26380 -v /mydata/redis/6380/sentinel/sentinel.conf:/conf/sentinel.conf -v /mydata/redis/6380/sentinel/log:/var/log/sentinel --network host redis redis-sentinel /conf/sentinel.conf

#slave2
mkdir /mydata/redis/6381/sentinel
mkdir /mydata/redis/6381/sentinel/log
vi /mydata/redis/6381/sentinel/sentinel.conf
#輸入
port 26381
dir "/var/log/sentinel"
logfile "/var/log/sentinel/26381.log"
sentinel monitor mymaster 192.168.243.4 6381 2
sentinel down-after-milliseconds mymaster 5000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
#end
docker run -d --name sentinel26381 -v /mydata/redis/6381/sentinel/sentinel.conf:/conf/sentinel.conf -v /mydata/redis/6381/sentinel/log:/var/log/sentinel --network host redis redis-sentinel /conf/sentinel.conf

3.SpringBoot連線

application.yml

spring:
  redis:
    timeout: 5000
    sentinel:
      master: mymaster
      nodes: 192.168.243.4:26379,192.168.243.4:26380,192.168.243.4:26381

controller

    @Autowired
	private StringRedisTemplate redisTemplate;

	@RequestMapping("/redis")
    public String redis() {
        redisTemplate.opsForValue().set("test", "121323123");
        String test = redisTemplate.opsForValue().get("test");
        return "RESULT: " + test;
    }

存取localhost:8080/redis

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使用Docker設定redis sentinel哨兵的方法步驟

目錄

1.設定主從

2. 設定哨兵

3.SpringBoot連線

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