Spring 作为 Docker 容器启动时，启动服务无法连接到 Spring 云配置服务器

Question

我正在使用 Spring 云配置服务器和一个简单的 Spring 引导项目。 所以我有一个 Spring 云配置服务和另一个连接到 Spring 云配置服务的简单服务来获取一些属性，如数据库凭据和其他属性。 如果我在本地测试它一切正常，但如果我尝试将这 2 个服务作为 docker 容器启动，则它不起作用。 Spring 云配置服务启动正常，然后我尝试启动其他服务，但它不工作。 它无法连接到配置服务器，我不明白为什么。

spring 云配置服务器应用程序.yml：

 server: port: 8888 spring: application: name: spring-cloud-config-server cloud: config: label: master server: git: uri: https://github.com/... security: user: name: gigi password: $2a$10$QpA9JjOQiciPKokmwlxEYOPtZLIHfTFECvDeL8in.ZGWVUY24Cx/a

spring 云配置服务器 pom.xml

 <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.7.0</version> <relativePath/> <.-- lookup parent from repository --> </parent> <groupId>com.gab.microservices</groupId> <artifactId>spring-cloud-config-server</artifactId> <version>0.0.1-SNAPSHOT</version> <name>spring-cloud-config-server</name> <description>Centralized Configuration Server</description> <properties> <java.version>11</java.version> <spring-cloud.version>2021.0.3</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-config-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <image> <name>eveningstar33/mmv2-${project:artifactId}.${project version}</name> <pullPolicy>IF_NOT_PRESENT</pullPolicy> </image> </configuration> </plugin> </plugins> </build> </project>

我在本地启动 spring 云配置服务器作为 docker 容器：

 $ docker run -p 8888:8888 eveningstar33/mmv2-spring-cloud-config-server:0.0.1-SNAPSHOT Setting Active Processor Count to 4 Calculating JVM memory based on 4828376K available memory `For more information on this calculation, see https://paketo.io/docs/reference/java-reference/#memory-calculator Calculated JVM Memory Configuration: -XX:MaxDirectMemorySize=10M -Xmx4211948K -XX:MaxMetaspaceSize=104427K -XX:ReservedCodeCacheSize=240M -Xss1M (Total Memory: 4828376K, Thread Count: 250, Loaded Class Count: 16023, Headroom: 0%) Enabling Java Native Memory Tracking Adding 127 container CA certificates to JVM truststore Spring Cloud Bindings Enabled Picked up JAVA_TOOL_OPTIONS: -Djava.security.properties=/layers/paketo-buildpacks_bellsoft-liberica/java-security-properties/java-security.properties -XX:+ExitOnOutOfMemoryError -XX:ActiveProcessorCount=4 -XX:MaxDirectMemorySize=10M -Xmx4211948K -XX:MaxMetaspaceSize=104427K -XX:ReservedCodeCacheSize=240M -Xss1M -XX:+UnlockDiagnosticVMOptions -XX:NativeMemoryTracking=summary -XX:+PrintNMTStatistics -Dorg.springframework.cloud.bindings.boot.enable=true. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____|.__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/:: Spring Boot:: (v2.7.0) 2022-06-26 15:40:12.369 INFO 1 --- [ main] gmsSpringCloudConfigServerApplication: Starting SpringCloudConfigServerApplication v0.0.1-SNAPSHOT using Java 11.0.15.1 on 058d17df827b with PID 1 (/workspace/BOOT-INF/classes started by cnb in /workspace) 2022-06-26 15:40:12.376 INFO 1 --- [ main] gmsSpringCloudConfigServerApplication: No active profile set, falling back to 1 default profile: "default" 2022-06-26 15:40:14.409 INFO 1 --- [ main] oscloud.context.scope.GenericScope: BeanFactory id=e8bf239d-fb47-310c-99e0-8c15e49dfb55 2022-06-26 15:40:15.015 INFO 1 --- [ main] osbwembedded.tomcat.TomcatWebServer: Tomcat initialized with port(s): 8888 (http) 2022-06-26 15:40:15.034 INFO 1 --- [ main] o.apache.catalina.core.StandardService: Starting service [Tomcat] 2022-06-26 15:40:15.035 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine: Starting Servlet engine: [Apache Tomcat/9.0.63] 2022-06-26 15:40:15.158 INFO 1 --- [ main] oac.c.C.[Tomcat].[localhost].[/]: Initializing Spring embedded WebApplicationContext 2022-06-26 15:40:15.158 INFO 1 --- [ main] wsc.ServletWebServerApplicationContext: Root WebApplicationContext: initialization completed in 2630 ms 2022-06-26 15:40:16.137 INFO 1 --- [ main] ossweb.DefaultSecurityFilterChain: Will secure any request with [org.springframework.security.web.session.DisableEncodeUrlFilter@5dbbb292, org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@613f7eb7, org.springframework.security.web.context.SecurityContextPersistenceFilter@1ac730cd, org.springframework.security.web.header.HeaderWriterFilter@b5b9333, org.springframework.security.web.csrf.CsrfFilter@30bbcf91, org.springframework.security.web.authentication.logout.LogoutFilter@487cd177, org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter@3375ebd3, org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter@6467ddc7, org.springframework.security.web.authentication.ui.DefaultLogoutPageGeneratingFilter@565aa4ac, org.springframework.security.web.authentication.www.BasicAuthenticationFilter@40717ed, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@5aa62ee7, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@1f7cec93, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@587c5c1, org.springframework.security.web.session.SessionManagementFilter@38588dea, org.springframework.security.web.access.ExceptionTranslationFilter@79627d27, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@2199e845] 2022-06-26 15:40:17.116 INFO 1 --- [ main] osbwembedded.tomcat.TomcatWebServer: Tomcat started on port(s): 8888 (http) with context path '' 2022-06-26 15:40:17.148 INFO 1 --- [ main] gmsSpringCloudConfigServerApplication: Started SpringCloudConfigServerApplication in 5.731 seconds (JVM running for 6.46)

我可以在 url http://localhost:8888/currency-exchange/master 提出请求，这些是信息：

 { "name": "currency-exchange", "profiles": [ "master" ], "label": null, "version": "7b6626f321d73191ca6cfc55f518f7158e1a2313", "state": null, "propertySources": [ { "name": "https://github.com/... "source": { "spring.cloud.config.label": "master", "spring.cloud.config.uri": "http://localhost:8888", "spring.cloud.config.username": "gigi", "spring.cloud.config.password": "test1234", "spring.datasource.url": "jdbc:mysql://docker-mysql:3306/testdb", "spring.datasource.username": "root", "spring.datasource.password": "test1234", "spring.security.user.name": "admin", "spring.security.user.password": "$2a$10$QpA9JjOQiciPKokmwlxEYOPtZLIHfTFECvDeL8in.ZGWVUY24Cx/a" } } ] }

之后，我尝试启动其他服务，但连接被拒绝：

 $ docker run -p 8000:8000 eveningstar33/mmv2-currency-exchange-service:0.0.1-SNAPSHOT Setting Active Processor Count to 4 Calculating JVM memory based on 4502728K available memory `For more information on this calculation, see https://paketo.io/docs/reference/java-reference/#memory-calculator Calculated JVM Memory Configuration: -XX:MaxDirectMemorySize=10M -Xmx3840722K -XX:MaxMetaspaceSize=150005K -XX:ReservedCodeCacheSize=240M -Xss1M (Total Memory: 4502728K, Thread Count: 250, Loaded Class Count: 24070, Headroom: 0%) Enabling Java Native Memory Tracking Adding 127 container CA certificates to JVM truststore Spring Cloud Bindings Enabled Picked up JAVA_TOOL_OPTIONS: -Djava.security.properties=/layers/paketo-buildpacks_bellsoft-liberica/java-security-properties/java-security.properties -XX:+ExitOnOutOfMemoryError -XX:ActiveProcessorCount=4 -XX:MaxDirectMemorySize=10M -Xmx3840722K -XX:MaxMetaspaceSize=150005K -XX:ReservedCodeCacheSize=240M -Xss1M -XX:+UnlockDiagnosticVMOptions -XX:NativeMemoryTracking=summary -XX:+PrintNMTStatistics -Dorg.springframework.cloud.bindings.boot.enable=true. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____|.__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/:: Spring Boot:: (v2.7.0) 2022-06-26 15:47:01.483 INFO [currency-exchange,,] 1 --- [ main] gmc.CurrencyExchangeServiceApplication: Starting CurrencyExchangeServiceApplication v0.0.1-SNAPSHOT using Java 11.0.15.1 on 08358a26aa24 with PID 1 (/workspace/BOOT-INF/classes started by cnb in /workspace) 2022-06-26 15:47:01.490 INFO [currency-exchange,,] 1 --- [ main] gmc.CurrencyExchangeServiceApplication: No active profile set, falling back to 1 default profile: "default" 2022-06-26 15:47:01.591 INFO [currency-exchange,,] 1 --- [ main] osc.c.c.ConfigServerConfigDataLoader: Fetching config from server at: http://localhost:8888 2022-06-26 15:47:01.592 INFO [currency-exchange,,] 1 --- [ main] osc.c.c.ConfigServerConfigDataLoader: Connect Timeout Exception on Url - http://localhost:8888. Will be trying the next url if available 2022-06-26 15:47:01.592 WARN [currency-exchange,,] 1 --- [ main] osc.c.c.ConfigServerConfigDataLoader: Could not locate PropertySource ([ConfigServerConfigDataResource@4aeaadc1 uris = array<String>['http://localhost:8888'], optional = true, profiles = list['default']]): I/O error on GET request for "http://localhost:8888/currency-exchange/default/master": Connection refused (Connection refused); nested exception is java.net.ConnectException: Connection refused (Connection refused) 2022-06-26 15:47:04.088 INFO [currency-exchange,,] 1 --- [ main].sdr.c.RepositoryConfigurationDelegate: Bootstrapping Spring Data JPA repositories in DEFAULT mode. 2022-06-26 15:47:04.511 INFO [currency-exchange,,] 1 --- [ main].sdr.c.RepositoryConfigurationDelegate: Finished Spring Data repository scanning in 403 ms. Found 1 JPA repository interfaces. 2022-06-26 15:47:05.655 INFO [currency-exchange,,] 1 --- [ main] oscloud.context.scope.GenericScope: BeanFactory id=14f08c66-f514-36a3-965b-ebd56a472fd5 2022-06-26 15:47:07.788 INFO [currency-exchange,,] 1 --- [ main] osbwembedded.tomcat.TomcatWebServer: Tomcat initialized with port(s): 8000 (http) 2022-06-26 15:47:07.814 INFO [currency-exchange,,] 1 --- [ main] o.apache.catalina.core.StandardService: Starting service [Tomcat] 2022-06-26 15:47:07.816 INFO [currency-exchange,,] 1 --- [ main] org.apache.catalina.core.StandardEngine: Starting Servlet engine: [Apache Tomcat/9.0.63] 2022-06-26 15:47:08.034 INFO [currency-exchange,,] 1 --- [ main] oac.c.C.[Tomcat].[localhost].[/]: Initializing Spring embedded WebApplicationContext 2022-06-26 15:47:08.034 INFO [currency-exchange,,] 1 --- [ main] wsc.ServletWebServerApplicationContext: Root WebApplicationContext: initialization completed in 6437 ms 2022-06-26 15:47:08.484 ERROR [currency-exchange,,] 1 --- [ main] osbweb.embedded.tomcat.TomcatStarter: Error starting Tomcat context. Exception: org.springframework.beans.factory.UnsatisfiedDependencyException. Message: Error creating bean with name 'webMvcMetricsFilter' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/web/servlet/WebMvcMetricsAutoConfiguration.class]: Unsatisfied dependency expressed through method 'webMvcMetricsFilter' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'simpleMeterRegistry' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/export/simple/SimpleMetricsExportAutoConfiguration.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dataSourcePoolMetadataMeterBinder' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/jdbc/DataSourcePoolMetricsAutoConfiguration$DataSourcePoolMetadataMetricsConfiguration.class]: Unsatisfied dependency expressed through method 'dataSourcePoolMetadataMeterBinder' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class 2022-06-26 15:47:08.521 INFO [currency-exchange,,] 1 --- [ main] o.apache.catalina.core.StandardService: Stopping service [Tomcat] 2022-06-26 15:47:08.547 WARN [currency-exchange,,] 1 --- [ main] ConfigServletWebServerApplicationContext: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat 2022-06-26 15:47:08.618 INFO [currency-exchange,,] 1 --- [ main] ConditionEvaluationReportLoggingListener: Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2022-06-26 15:47:08.663 ERROR [currency-exchange,,] 1 --- [ main] osbdLoggingFailureAnalysisReporter: *************************** APPLICATION FAILED TO START *************************** Description: Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured. Reason: Failed to determine a suitable driver class Action: Consider the following: If you want an embedded database (H2, HSQL or Derby), please put it on the classpath. If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active). Native Memory Tracking: Total: reserved=4647673752, committed=360292248 - Java Heap (reserved=3934257152, committed=181403648) (mmap: reserved=3934257152, committed=181403648) - Class (reserved=192943772, committed=52971164) (classes #9559) ( instance classes #8950, array classes #609) (malloc=1590940 #24005) (mmap: reserved=191352832, committed=51380224) ( Metadata: ) ( reserved=46137344, committed=44564480) ( used=43492240) ( free=1072240) ( waste=0 =0.00%) ( Class space:) ( reserved=145215488, committed=6815744) ( used=6117872) ( free=697872) ( waste=0 =0.00%) - Thread (reserved=20055984, committed=1083312) (thread #19) (stack: reserved=19968000, committed=995328) (malloc=68136 #116) (arena=19848 #35) - Code (reserved=254867960, committed=18545144) (malloc=1235448 #5350) (mmap: reserved=253632512, committed=17309696) - GC (reserved=190061883, committed=50801979) (malloc=9997627 #7092) (mmap: reserved=180064256, committed=40804352) - Compiler (reserved=11178686, committed=11178686) (malloc=35638 #532) (arena=11143048 #15) - Internal (reserved=389891, committed=389891) (malloc=357123 #1153) (mmap: reserved=32768, committed=32768) - Symbol (reserved=13126528, committed=13126528) (malloc=11383312 #133295) (arena=1743216 #1) - Native Memory Tracking (reserved=2835432, committed=2835432) (malloc=8120 #101) (tracking overhead=2827312) - Arena Chunk (reserved=27594984, committed=27594984) (malloc=27594984) - Tracing (reserved=97, committed=97) (malloc=97 #5) - Logging (reserved=4572, committed=4572) (malloc=4572 #192) - Arguments (reserved=19067, committed=19067) (malloc=19067 #495) - Module (reserved=172456, committed=172456) (malloc=172456 #1850) - Synchronizer (reserved=157096, committed=157096) (malloc=157096 #1302) - Safepoint (reserved=8192, committed=8192) (mmap: reserved=8192, committed=8192)

所以它无法连接到配置服务器，因此它无法连接到数据库并崩溃。

 currency-exchange service application.yml: spring: application: name: currency-exchange config: import: optional:configserver:http://localhost:8888 cloud: config: label: master uri: http://localhost:8888 username: gigi password: test1234 jpa: show-sql: true server: port: 8000

pom.xml

 <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.7.0</version> <relativePath/> <.-- lookup parent from repository --> </parent> <groupId>com.gab.microservices</groupId> <artifactId>currency-exchange-service</artifactId> <version>0.0.1-SNAPSHOT</version> <name>currency-exchange-service</name> <description>Demo project for Spring Boot</description> <properties> <java.version>11</java.version> <spring-cloud.version>2021.0.3</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-config</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-sleuth</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-sleuth-zipkin</artifactId> </dependency> <dependency> <groupId>org.springframework.amqp</groupId> <artifactId>spring-rabbit</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency> <dependency> <groupId>io.github.resilience4j</groupId> <artifactId>resilience4j-spring-boot2</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <.-- <dependency>--> <.-- <groupId>com.h2database</groupId>--> <.-- <artifactId>h2</artifactId>--> <.-- <scope>runtime</scope>--> <.-- </dependency>--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.24</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org:springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org springframework boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <image> <name>eveningstar33/mmv2-${project artifactId} ${project version}</name> <pullPolicy>IF_NOT_PRESENT</pullPolicy> </image> </configuration> </plugin> </plugins> </build> </project>

任何反馈将不胜感激谢谢

Answer 1

尝试将 jdbc 驱动程序添加为对您的 pom.xml 的依赖项，我在您的依赖项中看不到它。

似乎错误在于它没有在您的依赖项中找到驱动程序类，所以我会开始寻找那里。

Answer 2

每个容器都是另一个主机。 您不能使用环回地址进行容器间通信。 最简单的方法是使用 docker-compose。 它将配置 dns 名称，您将能够使用它们进行容器间通信。 像 http:// config-server :8888 , http:// currency-exchange :8000 , jdbc:mysql:// docker-mysql :3306/testdb

也许这个答案会很有用Docker how to send request(curl - get, post) 一个容器到另一个容器

并且您应该检查数据库驱动程序的运行时类路径，就像@jeekiii 说的那样。

我没有足够的评论声誉，但如果您有任何问题发表评论，我可以编辑我的答案。

Answer 3

如果您生成 docker 映像并单独启动所有映像，则它们无法与每个映像通信，因为每个 docker 容器将拥有自己的网络。 所以这就是为什么我们需要使用 docker 组合，当我们希望我们的容器相互通信时。