添加配置信息

spring.redis:
  database: 0 # Redis數據庫索引（默認為0）
  #host: 192.168.1.8
  #port: 6379
  password: 123456
  timeout: 10000 # 連接超時時間（毫秒）  
  pool: 
    max-active: 8 # 連接池最大連接數（使用負值表示沒有限制）
    max-idle: 8 # 連接池中的最大空閑連接
    max-wait: -1 # 連接池最大阻塞等待時間（使用負值表示沒有限制）
    min-idle: 0 # 連接池中的最小空閑連接
  cluster:
    nodes:
      - 192.168.1.8:9001
      - 192.168.1.8:9002
      - 192.168.1.8:9003
 

只需要添加3個master節點，3個slave節點不需要添加。

你要做的也只有這些配置了，其他的spring boot都自動配置好了。

現在就可以像使用單機一樣使用集群，redis會自動按key分片到不同的集群實例。

遇到的問題

Caused by: redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
    at redis.clients.util.Pool.getResource(Pool.java:53)
    at redis.clients.jedis.JedisPool.getResource(JedisPool.java:226)
    at redis.clients.jedis.JedisSlotBasedConnectionHandler.getConnectionFromSlot(JedisSlotBasedConnectionHandler.java:66)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:116)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:141)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:141)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:141)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:141)
    at redis.clients.jedis.JedisClusterCommand.runBinary(JedisClusterCommand.java:60)
    at redis.clients.jedis.BinaryJedisCluster.set(BinaryJedisCluster.java:77)
    at org.springframework.data.redis.connection.jedis.JedisClusterConnection.set(JedisClusterConnection.java:618)
    ... 36 more
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused: connect
    at redis.clients.jedis.Connection.connect(Connection.java:207)
    at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:93)
    at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1767)
    at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:106)
    at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:868)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:435)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:363)
    at redis.clients.util.Pool.getResource(Pool.java:49)
    ... 46 more
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at redis.clients.jedis.Connection.connect(Connection.java:184)
    ... 53 more
 

嘗試往redis寫數據的時候，報不能獲取連接異常，跟蹤了半天代碼，發現連接的是127.0.0.1，而不是配置的192.168.1.8，這就奇怪了，繼續跟蹤代碼發現是往redis服務器獲取的返回的集群實例列表，真是坑！

源碼：

redis.clients.jedis.Jedis#clusterSlots

@Override
public List<Object> clusterSlots() {
    checkIsInMultiOrPipeline();
    client.clusterSlots();
    return client.getObjectMultiBulkReply();
}
 

就是這裏獲取返回的集群列表，返回的就是127.0.0.1，而不是配置的192.168.1.8。

最後修改各個集群節點的配置文件redis.conf，添加：

bind 192.168.1.8

重啟集群節點之後，讀寫正常。

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Spring Boot Redis Cluster 實戰幹貨