如何使用jedis for Java连接Docker Redis集群实例？

Question

我已经使用redis docker-compose创建了一个包含6个节点的集群(3个主节点和3个从节点)，并将它们全部链接起来。集群信息

cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:5
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:1
cluster_stats_messages_ping_sent:23
cluster_stats_messages_pong_sent:31
cluster_stats_messages_meet_sent:1
cluster_stats_messages_sent:55
cluster_stats_messages_ping_received:26
cluster_stats_messages_pong_received:24
cluster_stats_messages_meet_received:5
cluster_stats_messages_received:55

集群节点

d794a9ab002f0c3cb699ce68a09310dd0fdb17de 192.168.65.3:32789@32783 slave c6c05515c3be01a1438b6d2aad823c0fa50b1743 0 1586629088989 5 connected
7d4fab850bcfac8754a559c5e9469698b7f182bc 192.168.65.3:32792@32787 master - 0 1586629087000 2 connected 5461-10922
c6c05515c3be01a1438b6d2aad823c0fa50b1743 192.168.65.3:32793@32788 master - 0 1586629089995 4 connected 10923-16383
229b9b4f919f79a1c24b7b849c42acb9e3378532 192.168.65.3:32790@32785 slave 9b649a67dc53084ed7416b20e8bab00289e636d2 0 1586629089000 6 connected
9b649a67dc53084ed7416b20e8bab00289e636d2 192.168.65.3:32791@32786 myself,master - 0 1586629086000 1 connected 0-5460

如上所示，集群似乎正在工作，但是当我尝试使用jedis在java应用程序中调用集群实例时，使用以下代码

jedis = new JedisCluster(new HostAndPort("0.0.0.0", 32790));
jedis.set("events/city/rome", "32,15,223,828");

然后我得到了下面的错误

Exception in thread "main" redis.clients.jedis.exceptions.JedisClusterMaxAttemptsException: No more cluster attempts left.
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:86)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:124)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:124)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:124)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:124)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:124)
    at redis.clients.jedis.JedisClusterCommand.run(JedisClusterCommand.java:25)
    at redis.clients.jedis.JedisCluster.set(JedisCluster.java:112)
    at sc.dev.algordf.ALGORDF.main(ALGORDF.java:53)

请帮我找出可能是什么问题。是否因为我在创建jedis实例时没有指定正确的IP和端口号。还是我遗漏了什么。

谢谢。

Answer 1

问题出在Redis集群配置中！

您的应用程序向其中一个已配置的节点发出请求。接收所有Redis节点的地址，本例中为Docker网络中的IP。因此，您会得到一个连接错误。

要解决此问题，请向集群中的每个节点添加以下参数，以更新"advertise“地址

节点192.168.83.101:7000:17000示例(扩展坞主机为192.168.83.101，命令端口为7000，群集总线端口为17000)

cluster-announce-ip 192.168.83.100
cluster-announce-port 7000
cluster-announce-bus-port 17000