〇、背景
已在虚拟机（CentOS 7，在本文也称其为宿主机——即docker容器的宿主机）的docker中搭建好了6个节点的redis （host网络模式）集群：Docker Redis 5.0集群搭建
现在在本机（Windows 7）以Spring Boot环境连接集群
一、异常1：无法连接集群
1.配置：
1 #rediss 2 spring.redis.cluster.nodes=192.168.22.130:7001,192.168.22.130:7002,192.168.22.130:7003,192.168.22.130:7004,192.168.22.130:7005,192.168.22.130:7006 3 spring.redis.timeout=60000 4 spring.redis.jedis.pool.max-wait=-1 5 spring.redis.jedis.pool.max-active=300
6 spring.redis.jedis.pool.max-idle=100
7 spring.redis.jedis.pool.min-idle=20
2.报错：
org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is io.lettuce.core.RedisException: Cannot retrieve initial cluster partitions from initial URIs [RedisURI [host='192.168.22.130', port=7001], RedisURI [host='192.168.22.130', port=7002], RedisURI [host='192.168.22.130', port=7003],
RedisURI [host='192.168.22.130', port=7004], RedisURI [host='192.168.22.130', port=7005], RedisURI [host='192.168.22.130', port=7006]] at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1199)
3.报错具体信息：
2020-02-29 23:30:11.809 WARN 24336 --- [ioEventLoop-4-3] i.l.c.c.topology.ClusterTopologyRefresh : Unable to connect to [192.168.22.130:7003]: connection timed out: /192.168.22.130:7003 2020-02-29 23:30:11.809 WARN 24336 --- [ioEventLoop-4-4] i.l.c.c.topology.ClusterTopologyRefresh : Unable to connect to [192.168.22.130:7004]: connection timed out: /192.168.22.130:7004 2020-02-29 23:30:11.810 WARN 24336 --- [ioEventLoop-4-2] i.l.c.c.topology.ClusterTopologyRefresh : Unable to connect to [192.168.22.130:7002]: connection timed out: /192.168.22.130:7002 2020-02-29 23:30:11.809 WARN 24336 --- [ioEventLoop-4-1] i.l.c.c.topology.ClusterTopologyRefresh : Unable to connect to [192.168.22.130:7001]: connection timed out: /192.168.22.130:7001 2020-02-29 23:30:11.824 WARN 24336 --- [ioEventLoop-4-1] i.l.c.c.topology.ClusterTopologyRefresh : Unable to connect to [192.168.22.130:7005]: connection timed out: /192.168.22.130:7005 2020-02-29 23:30:11.824 WARN 24336 --- [ioEventLoop-4-2] i.l.c.c.topology.ClusterTopologyRefresh : Unable to connect to [192.168.22.130:7006]: connection timed out: /192.168.22.130:7006 org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is io.lettuce.core.RedisException: Cannot retrieve initial cluster partitions from initial URIs [RedisURI [host='192.168.22.130', port=7001], RedisURI [host='192.168.22.130', port=7002], RedisURI [host='192.168.22.130', port=7003], RedisURI [host='192.168.22.130', port=7004], RedisURI [host='192.168.22.130', port=7005], RedisURI [host='192.168.22.130', port=7006]] at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory $SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1199) at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory $SharedConnection.getConnection(LettuceConnectionFactory.java:1178) at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory .getClusterConnection(LettuceConnectionFactory.java:372) at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory .getConnection(LettuceConnectionFactory.java:349) at org.springframework.data.redis.core.RedisConnectionUtils.doGetConnection (RedisConnectionUtils.java:134) at org.springframework.data.redis.core.RedisConnectionUtils.getConnection (RedisConnectionUtils.java:97) at org.springframework.data.redis.core.RedisConnectionUtils.getConnection (RedisConnectionUtils.java:84) at org.springframework.data.redis.core.RedisTemplate.execute (RedisTemplate.java:215) at org.springframework.data.redis.core.RedisTemplate.execute (RedisTemplate.java:188) at org.springframework.data.redis.core.RedisTemplate.randomKey (RedisTemplate.java:921) at com.drajun.rushbuying.RushBuyingApplicationTests.getRedisKeyTest (RushBuyingApplicationTests.java:26) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.platform.commons.util.ReflectionUtils.invokeMethod (ReflectionUtils.java:675) at org.junit.jupiter.engine.execution.MethodInvocation.proceed (MethodInvocation.java:60) at org.junit.jupiter.engine.execution.InvocationInterceptorChain $ValidatingInvocation.proceed(InvocationInterceptorChain.java:125) at org.junit.jupiter.engine.extension.TimeoutExtension.intercept (TimeoutExtension.java:132) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMetho d(TimeoutExtension.java:124) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod (TimeoutExtension.java:74) at org.junit.jupiter.engine.execution.ExecutableInvoker $ReflectiveInterceptorCall.lambda$ofVoidMethod$0 (ExecutableInvoker.java:115) at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda $invoke$0(ExecutableInvoker.java:105) at org.junit.jupiter.engine.execution.InvocationInterceptorChain $InterceptedInvocation.proceed(InvocationInterceptorChain.java:104) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed (InvocationInterceptorChain.java:62) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvo ke(InvocationInterceptorChain.java:43) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke (InvocationInterceptorChain.java:35) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke (ExecutableInvoker.java:104) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke (ExecutableInvoker.java:98) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda $invokeTestMethod$6(TestMethodTestDescriptor.java:202) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute (ThrowableCollector.java:73) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMet hod(TestMethodTestDescriptor.java:198) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute (TestMethodTestDescriptor.java:135) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute (TestMethodTestDescriptor.java:69) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda $executeRecursively$5(NodeTestTask.java:135) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute (ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda $executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around (Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda $executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute (ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursi vely(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute (NodeTestTask.java:80) at java.util.ArrayList.forEach(ArrayList.java:1249) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestE xecutorService.invokeAll (SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda $executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute (ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda $executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around (Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda $executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute (ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursi vely(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute (NodeTestTask.java:80) at java.util.ArrayList.forEach(ArrayList.java:1249) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestE xecutorService.invokeAll (SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda $executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute (ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda $executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around (Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda $executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute (ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursi vely(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute (NodeTestTask.java:80) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestE xecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.ex ecute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.exec ute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.DefaultLauncher.execute (DefaultLauncher.java:229) at org.junit.platform.launcher.core.DefaultLauncher.lambda $execute$6(DefaultLauncher.java:197) at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams (DefaultLauncher.java:211) at org.junit.platform.launcher.core.DefaultLauncher.execute (DefaultLauncher.java:191) at org.junit.platform.launcher.core.DefaultLauncher.execute (DefaultLauncher.java:128) at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs (JUnit5IdeaTestRunner.java:74) at com.intellij.rt.execution.junit.IdeaTestRunner $Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart (JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main (JUnitStarter.java:70) Caused by: io.lettuce.core.RedisException: Cannot retrieve initial cluster partitions from initial URIs [RedisURI [host='192.168.22.130', port=7001], RedisURI [host='192.168.22.130', port=7002], RedisURI [host='192.168.22.130', port=7003], RedisURI [host='192.168.22.130', port=7004], RedisURI [host='192.168.22.130', port=7005], RedisURI [host='192.168.22.130', port=7006]] at io.lettuce.core.cluster.RedisClusterClient.loadPartitions (RedisClusterClient.java:859) at io.lettuce.core.cluster.RedisClusterClient.initializePartitions (RedisClusterClient.java:813) at io.lettuce.core.cluster.RedisClusterClient.getPartitions (RedisClusterClient.java:823) at org.springframework.data.redis.connection.lettuce.ClusterConnectionProvide r.getConnectionAsync(ClusterConnectionProvider.java:92) at org.springframework.data.redis.connection.lettuce.ClusterConnectionProvide r.getConnectionAsync(ClusterConnectionProvider.java:40) at org.springframework.data.redis.connection.lettuce.LettuceConnectionProvide r.getConnection(LettuceConnectionProvider.java:53) at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory $SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1197) ... 73 more Caused by: io.lettuce.core.RedisConnectionException: Unable to establish a connection to Redis Cluster at [RedisURI [host='192.168.22.130', port=7001], RedisURI [host='192.168.22.130', port=7002], RedisURI [host='192.168.22.130', port=7003], RedisURI [host='192.168.22.130', port=7004], RedisURI [host='192.168.22.130', port=7005], RedisURI [host='192.168.22.130', port=7006]] at io.lettuce.core.cluster.topology.AsyncConnections.get (AsyncConnections.java:89) at io.lettuce.core.cluster.topology.ClusterTopologyRefresh.loadViews (ClusterTopologyRefresh.java:76) at io.lettuce.core.cluster.RedisClusterClient.doLoadPartitions (RedisClusterClient.java:865) at io.lettuce.core.cluster.RedisClusterClient.loadPartitions (RedisClusterClient.java:838) ... 79 more
4.解决
step(1)
因为spring-boot-starter-data-redis默认的redis客户端是使用lettuce，而上面我配置是jedis。
把配置中的jedis改为lettuce（当然选择 在pom文件中排除lettuce依赖，而使用jedis）
#rediss spring.redis.cluster.nodes=192.168.22.130:7001,192.168.22.130:7002,192.168.22.130:7003,192.168.22.130:7004,192.168.22.130:7005,192.168.22.130:7006 spring.redis.timeout=60000 spring.redis.lettuce.pool.max-wait=-1 spring.redis.lettuce.pool.max-active=300 spring.redis.lettuce.pool.max-idle=100 spring.redis.lettuce.pool.min-idle=20
step(2) 注意在本机上看看能不能ping通所配置的redis集群节点
若ping不通，则需在本机添加到docker容器——redis集群节点的路由
windows命令行窗口下使用命令：route -p add 目标网络号 MASK 子网掩码 网关
例如：我的CentOS7ip配置如下：
并且我的redis配置时使用了host网络模式（即该容器共享了宿主机的网络命名空间，直接暴露在公共网络中，即通过宿主机ip+端口可访问该容器）。
所以在本机上加上路由信息：route -p add 192.168.22.0 MASK 255.255.255.0 172.17.0.2
再ping，便连通了。
step(3) 宿主机端口开放
注意在在本机上不仅要通过ip连得上虚拟机，并且得连接得到具体的端口（redis节点的端口）
在CentOS7虚拟机上使用 firewall-cmd --list-ports 命令查看防火墙开放的端口
若没有redis节点的端口，则使用 firewall-cmd --zone=public --add-port=80/tcp --permanent 命令开放redis各节点端口
使用 firewall-cmd --reload 重启防火墙
二、异常2：找不到类GenericObjectPoolConfig
1.报错
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'redisConnectionFactory' defined in class path resource [org/springframework/boot/autoconfigure/data/redis/LettuceConnectionConfiguration.class]: Bean instantiation via factory method failed;
nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory]: Factory method 'redisConnectionFactory' threw exception;
nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig
2.解决
添加连接池依赖
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-pool2 --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> <version>2.8.0</version> </dependency>