redis架构

启动主服务器

docker run -d --name redis6379 
--restart=always --net=host redis

启动从服务器

docker run -d --name redis6380 
--restart=always --net=host 
redis redis-server --port 6380 --slaveof 192.168.64.150 6379

启动从服务器

docker run -d --name redis6381 
--restart=always --net=host 
redis redis-server --port 6381 --slaveof 192.168.64.150 6379

查看

docker exec -it redis6379 redis-cli
info replication
docker exec -it redis6380 redis-cli
info replication

mkdir /opt/sentinel/
cd /opt/sentinel/

# 配置文件中的 "sentinel monitor mymaster 192.168.64.150 6379 2"
# 末尾的 2 表示两个哨兵投票确认主服务器宕机，哨兵才会认为主服务器宕机
cat <5000.conf
port 5000
sentinel monitor mymaster 192.168.64.150 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel parallel-syncs mymaster 1
EOF

cat <5001.conf
port 5001
sentinel monitor mymaster 192.168.64.150 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel parallel-syncs mymaster 1
EOF

cat <5002.conf
port 5002
sentinel monitor mymaster 192.168.64.150 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel parallel-syncs mymaster 1
EOF

启动三个哨兵

docker run -d --name sentinel5000 
-v /opt/sentinel/5000.conf:/sentinel.conf 
--net=host 
redis redis-sentinel /sentinel.conf

docker run -d --name sentinel5001 
-v /opt/sentinel/5001.conf:/sentinel.conf 
--net=host 
redis redis-sentinel /sentinel.conf

docker run -d --name sentinel5002 
-v /opt/sentinel/5002.conf:/sentinel.conf 
--net=host 
redis redis-sentinel /sentinel.conf

# 进入一个哨兵容器，查看它监控的主从服务器和其他哨兵
docker exec -it sentinel5000 redis-cli -p 5000
> sentinel master mymaster
> sentinel slaves mymaster
> sentinel sentinels mymaster

停止主服务器，测试主服务器重新选举

# 停止主服务器
docker stop redis6379
# 在哨兵日志中查看服务器切换日志： +switch-master mymaster 192.168.64.150 6379 192.168.64.150 6381
docker logs sentinel5000

# 查看 6380 和 6381 服务器的角色变化
docker exec -it redis6380 redis-cli -p 6380
> info replication

docker exec -it redis6381 redis-cli -p 6381
> info replication

重新启动6379，不会把6379切换成主服务器，而是作为从服务器

docker start redis6379

docker exec -it redis6379 redis-cli
> info replication

客户端api连接哨兵存取数据

        Set sets = new HashSet<>();
        sets.add("192.168.64.151:5000");
        sets.add("192.168.64.151:5001");
        sets.add("192.168.64.151:5002");

        JedisPoolConfig poolConfig = new JedisPoolConfig();

        JedisSentinelPool pool = new JedisSentinelPool("mymaster",sets,poolConfig);
        Jedis jedis = pool.getResource();
        jedis.set("a", "aaaaaaa");
        System.out.println(jedis.get("a"));
        jedis.close();

https://wanght.blog.csdn.net/article/details/119374989