redis 健康检查

报错

2019-10-31 22:17:35.957  WARN 19566 --- [io-19667-exec-9] o.s.b.a.redis.RedisHealthIndicator       : Redis health check failedredis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the poolat redis.clients.util.Pool.getResource(Pool.java:53) ~[jedis-2.9.3.jar!/:na]at redis.clients.jedis.JedisPool.getResource(JedisPool.java:226) ~[jedis-2.9.3.jar!/:na]at org.springframework.data.redis.connection.jedis.JedisClusterConnection$JedisClusterNodeResourceProvider.getResourceForSpecificNode(JedisClusterConnection.java:911) ~[spring-data-redis-2.1.10.RELEASE.jar!/:2.1.10.RELEASE]at org.springframework.data.redis.connection.jedis.JedisClusterConnection$JedisClusterNodeResourceProvider.getResourceForSpecificNode(JedisClusterConnection.java:871) ~[spring-data-redis-2.1.10.RELEASE.jar!/:2.1.10.RELEASE]at org.springframework.data.redis.connection.ClusterCommandExecutor.executeCommandOnSingleNode(ClusterCommandExecutor.java:140) ~[spring-data-redis-2.1.10.RELEASE.jar!/:2.1.10.RELEASE]at org.springframework.data.redis.connection.ClusterCommandExecutor.executeCommandOnSingleNode(ClusterCommandExecutor.java:123) ~[spring-data-redis-2.1.10.RELEASE.jar!/:2.1.10.RELEASE]at org.springframework.data.redis.connection.ClusterCommandExecutor.executeCommandOnArbitraryNode(ClusterCommandExecutor.java:111) ~[spring-data-redis-2.1.10.RELEASE.jar!/:2.1.10.RELEASE]at org.springframework.data.redis.connection.jedis.JedisClusterConnection.clusterGetClusterInfo(JedisClusterConnection.java:751) ~[spring-data-redis-2.1.10.RELEASE.jar!/:2.1.10.RELEASE]at org.springframework.boot.actuate.redis.RedisHealthIndicator.doHealthCheck(RedisHealthIndicator.java:58) ~[spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at org.springframework.boot.actuate.health.AbstractHealthIndicator.health(AbstractHealthIndicator.java:82) ~[spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at org.springframework.boot.actuate.health.CompositeHealthIndicator.health(CompositeHealthIndicator.java:95) [spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at org.springframework.boot.actuate.health.HealthEndpoint.health(HealthEndpoint.java:50) [spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at org.springframework.boot.actuate.health.HealthEndpointWebExtension.health(HealthEndpointWebExtension.java:53) [spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at sun.reflect.GeneratedMethodAccessor108.invoke(Unknown Source) ~[na:na]at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:282) [spring-core-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.boot.actuate.endpoint.invoke.reflect.ReflectiveOperationInvoker.invoke(ReflectiveOperationInvoker.java:76) [spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at org.springframework.boot.actuate.endpoint.annotation.AbstractDiscoveredOperation.invoke(AbstractDiscoveredOperation.java:60) [spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping$ServletWebOperationAdapter.handle(AbstractWebMvcEndpointHandlerMapping.java:278) [spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping$OperationHandler.handle(AbstractWebMvcEndpointHandlerMapping.java:334) [spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at sun.reflect.GeneratedMethodAccessor107.invoke(Unknown Source) ~[na:na]at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) [spring-webmvc-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) [spring-webmvc-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) [spring-webmvc-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) [spring-webmvc-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039) [spring-webmvc-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) [spring-webmvc-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) [spring-webmvc-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) [spring-webmvc-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) [spring-webmvc-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-embed-websocket-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:88) [spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:114) [spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:104) [spring-boot-actuator-2.1.7.RELEASE.jar!/:2.1.7.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) [spring-web-5.1.9.RELEASE.jar!/:5.1.9.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.22.jar!/:9.0.22]at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: Failed connecting to host 192.168.0.68:7005at redis.clients.jedis.Connection.connect(Connection.java:207) ~[jedis-2.9.3.jar!/:na]at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:101) ~[jedis-2.9.3.jar!/:na]at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1844) ~[jedis-2.9.3.jar!/:na]at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:106) ~[jedis-2.9.3.jar!/:na]at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:889) ~[commons-pool2-2.6.2.jar!/:2.6.2]at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:424) ~[commons-pool2-2.6.2.jar!/:2.6.2]at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:349) ~[commons-pool2-2.6.2.jar!/:2.6.2]at redis.clients.util.Pool.getResource(Pool.java:49) ~[jedis-2.9.3.jar!/:na]... 82 common frames omitted
Caused by: java.net.ConnectException: Connection timed out (Connection timed out)at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_131]at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_131]at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_131]at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_131]at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_131]at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_131]at redis.clients.jedis.Connection.connect(Connection.java:184) ~[jedis-2.9.3.jar!/:na]... 89 common frames omitted

分析：

序

本文主要研究一下redis的HealthIndicator

RedisHealthIndicator

spring-boot-actuator-2.0.4.RELEASE-sources.jar!/org/springframework/boot/actuate/redis/RedisHealthIndicator.java

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//package org.springframework.boot.actuate.redis;import java.util.Properties;
import org.springframework.boot.actuate.health.AbstractHealthIndicator;
import org.springframework.boot.actuate.health.Health.Builder;
import org.springframework.data.redis.connection.ClusterInfo;
import org.springframework.data.redis.connection.RedisClusterConnection;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisConnectionUtils;
import org.springframework.util.Assert;public class RedisHealthIndicator extends AbstractHealthIndicator {static final String VERSION = "version";static final String REDIS_VERSION = "redis_version";private final RedisConnectionFactory redisConnectionFactory;public RedisHealthIndicator(RedisConnectionFactory connectionFactory) {super("Redis health check failed");Assert.notNull(connectionFactory, "ConnectionFactory must not be null");this.redisConnectionFactory = connectionFactory;}protected void doHealthCheck(Builder builder) throws Exception {RedisConnection connection = RedisConnectionUtils.getConnection(this.redisConnectionFactory);try {if (connection instanceof RedisClusterConnection) {ClusterInfo clusterInfo = ((RedisClusterConnection)connection).clusterGetClusterInfo();builder.up().withDetail("cluster_size", clusterInfo.getClusterSize()).withDetail("slots_up", clusterInfo.getSlotsOk()).withDetail("slots_fail", clusterInfo.getSlotsFail());} else {Properties info = connection.info();builder.up().withDetail("version", info.getProperty("redis_version"));}} finally {RedisConnectionUtils.releaseConnection(connection, this.redisConnectionFactory);}}
}

这里判断是否是cluster，如果是则调用clusterGetClusterInfo，否则调用info方法

RedisReactiveHealthIndicator

spring-boot-actuator-2.0.4.RELEASE-sources.jar!/org/springframework/boot/actuate/redis/RedisReactiveHealthIndicator.java

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//package org.springframework.boot.actuate.redis;import java.util.Properties;
import java.util.function.Function;
import java.util.function.Supplier;
import org.springframework.boot.actuate.health.AbstractReactiveHealthIndicator;
import org.springframework.boot.actuate.health.Health;
import org.springframework.boot.actuate.health.Health.Builder;
import org.springframework.data.redis.connection.ReactiveRedisConnection;
import org.springframework.data.redis.connection.ReactiveRedisConnectionFactory;
import reactor.core.publisher.Mono;
import reactor.core.scheduler.Schedulers;public class RedisReactiveHealthIndicator extends AbstractReactiveHealthIndicator {private final ReactiveRedisConnectionFactory connectionFactory;public RedisReactiveHealthIndicator(ReactiveRedisConnectionFactory connectionFactory) {super("Redis health check failed");this.connectionFactory = connectionFactory;}protected Mono<Health> doHealthCheck(Builder builder) {return this.getConnection().flatMap((connection) -> {return this.doHealthCheck(builder, connection);});}private Mono<Health> doHealthCheck(Builder builder, ReactiveRedisConnection connection) {return connection.serverCommands().info().map((info) -> {return this.up(builder, info);}).onErrorResume((ex) -> {return Mono.just(this.down(builder, ex));}).flatMap((health) -> {return connection.closeLater().thenReturn(health);});}private Mono<ReactiveRedisConnection> getConnection() {ReactiveRedisConnectionFactory var10000 = this.connectionFactory;this.connectionFactory.getClass();return Mono.fromSupplier(var10000::getReactiveConnection).subscribeOn(Schedulers.parallel());}private Health up(Builder builder, Properties info) {return builder.up().withDetail("version", info.getProperty("redis_version")).build();}private Health down(Builder builder, Throwable cause) {return builder.down(cause).build();}
}

采用lettuce的话，启用的是RedisReactiveHealthIndicator，这里调用info方法，不过这个方法返回的属性有点多，大约有83个

小结

redis的HealthIndicator分为RedisHealthIndicator以及RedisReactiveHealthIndicator。如果底层client采用的是lettuce，则使用的是reactive版本。其health检测方法，就是调用info命令。

doc

6.2.2. ReactiveRedisConnection and ReactiveRedisConnectionFactory

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redis 健康检查

序

RedisHealthIndicator

RedisReactiveHealthIndicator

小结

doc

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