Question

我在本地主机中设置了3个Redis Server和3个Redis Sentinel实例。服务器在以下位置运行：

127.0.0.1:6379 // Master
127.0.0.1:6380 // Slave
127.0.0.1:6381 // Slave

和哨兵在：

127.0.0.1:5000
127.0.0.1:5001
127.0.0.1:5002

我有一个（Java）客户端，尝试连接到其中一个哨兵并在Redis服务器中设置密钥：

// import statements

public class RedisPush {

    private static final String MASTER_NAME = "mymaster";
    private static final String PASSWORD = "foobared";
    private static final Set sentinels;
    static {
        sentinels = new HashSet();
        sentinels.add("127.0.0.1:5000");
        sentinels.add("127.0.0.1:5001");
        sentinels.add("127.0.0.1:5002");
    }

    public static void pushToRedis() {

        Jedis jedis = null;

        try {
            JedisSentinelPool pool = new JedisSentinelPool(MASTER_NAME, sentinels);
            System.out.println("Fetching connection from pool.");
            jedis = pool.getResource();
            jedis.auth(PASSWORD);
            Socket socket = jedis.getClient().getSocket();

            System.out.println("Connected to " + socket.getRemoteSocketAddress());
            int i = 0;
            while (true) {
                jedis.set("sentinel_key" + i, "value" + i);
                System.out.println(i);
                i++;
                Thread.sleep(1000);
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        finally {
            if(jedis != null)
                jedis.close();
        }

    }

    public static void main(String[] args) throws Exception {

        while(true) {

            pushToRedis();
            Thread.sleep(1000);
        }
    }
}

最初，我的哨兵配置如下（例如，第一个哨兵在端口5000上运行）：

bind 127.0.0.1
port 5000
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster foobared

如果我尝试运行（Java）客户端，则会出现以下错误：

Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
INFO: Trying to find master from available Sentinels...
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5001. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5000. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5002. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
redis.clients.jedis.exceptions.JedisConnectionException: All sentinels down, cannot determine where is mymaster master is running...
    at redis.clients.jedis.JedisSentinelPool.initSentinels(JedisSentinelPool.java:180)
    at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:95)
    at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:82)
    at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:70)
    at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:44)
    at RedisPush.pushToRedis(RedisPush.java:29)
    at RedisPush.main(RedisPush.java:61)

但是，如果我将前哨配置脚本更改为以下脚本：

# bind 127.0.0.1
port 5000
protected-mode no
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster foobared

客户端运行良好。我不明白为什么。

AFAIK，如果未在requirepass文件中设置sentinel.conf并且在bind文件中注释了sentinel.conf，则只有protected-mode将是{{1} }，以避免除yes之外的任何客户端连接到哨兵。在我的第一个哨兵配置中，我使用了localhost命令，但仍然无法正常工作。

为什么注释掉bind并将bind显式设置为protected-mode有用？

P.S。我也尝试过同时使用no和bind 127.0.0.1，但即使这样也没有用。

Answer 1

我有一个类似的问题，杰迪斯（Jedis）抛出了相同的错误，这与https://github.com/xetorthio/jedis/issues/1367

有关

要在Mac上解决此问题，我做了sudo ifconfig lo0 alias 127.0.1.1 然后将我的sentinel.conf更改为bind 127.0.1.1 然后将我的Yaml更新为spring数据以连接到该ip

sentinel.nodes: 127.0.1.1:5000, 127.0.1.1:5002, 127.0.1.1:5003

Answer 2

Jedis对Redis Sentinel的支持不佳。请改用生菜，这样可以更好地管理池。而且在springboot上也得到了很好的支持。

Java客户端无法连接到在本地主机上运行的Redis Sentinel

2 个答案: