使用Docker配置redis sentinel哨兵的方法步骤

目录

• 1.配置主从
• 2. 配置哨兵
• 3.SpringBoot连接

本文演示一主二从。

先说一下遇到的问题。我看网上说想配置哨兵，必须让启动redis的docker网络模式为host，否则无法访问到从还是什么的。我指定--network host后无法外网访问，redis desktop manager连不上redis了，后来发现我这个新克隆的机器没关防火墙，关上就好了。

1.配置主从

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

查看配置：

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

2. 配置哨兵

master

mkdir /mydata/redis/6379/sentinel
mkdir /mydata/redis/6379/sentinel/log
vi /mydata/redis/6379/sentinel/sentinel.conf
#输入
port 26379
dir "/var/log/sentinel"
logfile "/var/log/sentinel/26379.log"
sentinel monitor mymaster 192.168.243.4 6379 1 #这里暂时设置成1
                       ![在这里插入图片描述](https://img-blog.csdnimg.cn/9a303b239fec467385d2c8990cb3e629.png#pic_center)
                        #方便看一下主挂掉是什么效果
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

先进行测试：

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

此时redis6381已成为新的master

再启动docker start redis6379 6379是slave了

测试成功，修改上面配置文件的sentinel monitor mymaster 192.168.243.4 6379 2 数字配置为2，代表至少有2个Sentinel节点认为主节点不可达，那么这个不可达的判定才是客观的。为了防止票数相同，sentinel启动奇数个。

slave

#slave1
mkdir /mydata/redis/6380/sentinel
mkdir /mydata/redis/6380/sentinel/log
vi /mydata/redis/6380/sentinel/sentinel.conf
#输入
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
#输入
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连接

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;
    }

访问localhost:8080/redis

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