当我将 Spring Boot 应用程序部署到 AWS Elastic Beanstalk 并且无法从本地 Spring Boot 连接到 RDS 时出现 502 错误网关

Posted 2023-03-04

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【中文标题】当我将 Spring Boot 应用程序部署到 AWS Elastic Beanstalk 并且无法从本地 Spring Boot 连接到 RDS 时出现 502 错误网关【英文标题】：502 bad gateway when I deploy SpringBoot application to AWS Elastic Beanstalk and cannot connect to RDS from local SpringBoot 【发布时间】：2020-12-08 03:46:54 【问题描述】：

我是 AWS 新手，我打算将我的 StringBoot 应用程序部署到 AWS Elastic Beanstalk。我已经创建了 rds，我可以使用 mysql 工作台成功连接到它（没有构建模式）。但是当我将它部署到 Elastic Beanstalk 并运行它时，我收到错误 502 bad gateway nginx/1.18.0。

兄弟我的另一个问题是我无法使用本地 SpringBoot 连接到 rds。所以当我把它打包成jar文件时，我让maven跳过测试部分。我的 yml(files) 如下所示。在我发现它显示的日志中

Aug 18 22:45:10 ip-172-31-15-192 web: 2020-08-18 22:45:10.618  WARN 8134 --- [           main] o.h.e.j.e.i.JdbcEnvironmentInitiator     : HHH000342: Could not obtain connection to query metadata : Unknown database 'database-myblog'

这是否意味着这个数据库有问题，还是我必须在运行它之前创建一个架构？

一些yml文件如下所示；

application.yml

spring:
  thymeleaf:
    mode: html
  profiles:
    active: prod

2 application-prod.yml

server:
  port: 5000

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://endpoint:3306/database-myblog
    username: admin
    password: password

  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true

logging:
  level:
    root: warn
    com.lzl: info
  file:
    name: log/myblog-pro.log

3.log如下所示

/var/log/web.stdout.log
----------------------------------------
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:118)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1214)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1245)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:378)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1108)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
Aug 18 22:45:10 ip-172-31-15-192 web: at com.lzl.MyblogApplication.main(MyblogApplication.java:10)
Aug 18 22:45:10 ip-172-31-15-192 web: at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Aug 18 22:45:10 ip-172-31-15-192 web: at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
Aug 18 22:45:10 ip-172-31-15-192 web: at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Aug 18 22:45:10 ip-172-31-15-192 web: at java.base/java.lang.reflect.Method.invoke(Method.java:566)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.loader.Launcher.launch(Launcher.java:51)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:52)
Aug 18 22:45:10 ip-172-31-15-192 web: 2020-08-18 22:45:10.618  WARN 8134 --- [           main] o.h.e.j.e.i.JdbcEnvironmentInitiator     : HHH000342: Could not obtain connection to query metadata : Unknown database 'database-myblog'
Aug 18 22:45:10 ip-172-31-15-192 web: 2020-08-18 22:45:10.625  WARN 8134 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
Aug 18 22:45:10 ip-172-31-15-192 web: 2020-08-18 22:45:10.695 ERROR 8134 --- [           main] o.s.boot.SpringApplication               : Application run failed
Aug 18 22:45:10 ip-172-31-15-192 web: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1108)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
Aug 18 22:45:10 ip-172-31-15-192 web: at com.lzl.MyblogApplication.main(MyblogApplication.java:10)
Aug 18 22:45:10 ip-172-31-15-192 web: at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Aug 18 22:45:10 ip-172-31-15-192 web: at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
Aug 18 22:45:10 ip-172-31-15-192 web: at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Aug 18 22:45:10 ip-172-31-15-192 web: at java.base/java.lang.reflect.Method.invoke(Method.java:566)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.loader.Launcher.launch(Launcher.java:51)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:52)
Aug 18 22:45:10 ip-172-31-15-192 web: Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:275)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:176)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:118)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1214)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1245)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:378)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792)
Aug 18 22:45:10 ip-172-31-15-192 web: ... 24 common frames omitted
Aug 18 22:45:10 ip-172-31-15-192 web: Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:100)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:54)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:137)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101)
Aug 18 22:45:10 ip-172-31-15-192 web: at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263)
Aug 18 22:45:10 ip-172-31-15-192 web: ... 41 common frames omitted
Aug 18 22:45:14 ip-172-31-15-192 web: .   ____          _            __ _ _
Aug 18 22:45:14 ip-172-31-15-192 web: /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
Aug 18 22:45:14 ip-172-31-15-192 web: ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
Aug 18 22:45:14 ip-172-31-15-192 web: \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
Aug 18 22:45:14 ip-172-31-15-192 web: '  |____| .__|_| |_|_| |_\__, | / / / /
Aug 18 22:45:14 ip-172-31-15-192 web: =========|_|==============|___/=/_/_/_/
Aug 18 22:45:14 ip-172-31-15-192 web: :: Spring Boot ::        (v2.2.7.RELEASE)
Aug 18 22:45:15 ip-172-31-15-192 web: 2020-08-18 22:45:15.213  INFO 8167 --- [           main] com.lzl.MyblogApplication                : Starting MyblogApplication v0.0.1-SNAPSHOT on ip-172-31-15-192.us-east-2.compute.internal with PID 8167 (/var/app/current/application.jar started by webapp in /var/app/current)
Aug 18 22:45:15 ip-172-31-15-192 web: 2020-08-18 22:45:15.236  INFO 8167 --- [           main] com.lzl.MyblogApplication                : The following profiles are active: prod


----------------------------------------
/var/log/nginx/access.log
----------------------------------------
83.97.20.130 - - [18/Aug/2020:19:18:39 +0000] "GET / HTTP/1.1" 200 2197 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:76.0) Gecko/20100101 Firefox/76.0" "-"
71.88.108.155 - - [18/Aug/2020:19:27:54 +0000] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36" "-"
71.88.108.155 - - [18/Aug/2020:19:27:54 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36" "-"
209.17.97.82 - - [18/Aug/2020:20:39:36 +0000] "GET / HTTP/1.0" 502 157 "-" "Mozilla/5.0 (compatible; Nimbostratus-Bot/v1.3.2; http://cloudsystemnetworks.com)" "-"
71.88.108.155 - - [18/Aug/2020:21:28:16 +0000] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36" "-"
71.88.108.155 - - [18/Aug/2020:21:28:16 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36" "-"
71.88.108.155 - - [18/Aug/2020:21:31:39 +0000] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36" "-"
71.88.108.155 - - [18/Aug/2020:21:31:39 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36" "-"
71.88.108.155 - - [18/Aug/2020:21:55:47 +0000] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36" "-"
71.88.108.155 - - [18/Aug/2020:21:55:47 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36" "-"
71.88.108.155 - - [18/Aug/2020:22:02:46 +0000] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36" "-"
71.88.108.155 - - [18/Aug/2020:22:02:46 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36" "-"
209.17.97.2 - - [18/Aug/2020:22:03:52 +0000] "GET / HTTP/1.1" 502 157 "-" "Mozilla/5.0 (compatible; Nimbostratus-Bot/v1.3.2; http://cloudsystemnetworks.com)" "-"
102.165.30.57 - - [18/Aug/2020:22:17:34 +0000] "GET / HTTP/1.0" 502 157 "-" "NetSystemsResearch studies the availability of various services across the internet. Our website is netsystemsresearch.com" "-"


----------------------------------------
/var/log/nginx/error.log
----------------------------------------
2020/08/18 19:27:54 [error] 4712#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 71.88.108.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:5000/", host: "myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com"
2020/08/18 19:27:54 [error] 4712#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 71.88.108.155, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:5000/favicon.ico", host: "myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com", referrer: "http://myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com/"
2020/08/18 20:39:36 [error] 4712#0: *5 connect() failed (111: Connection refused) while connecting to upstream, client: 209.17.97.82, server: , request: "GET / HTTP/1.0", upstream: "http://127.0.0.1:5000/"
2020/08/18 21:28:16 [error] 4712#0: *8 connect() failed (111: Connection refused) while connecting to upstream, client: 71.88.108.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:5000/", host: "myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com"
2020/08/18 21:28:16 [error] 4712#0: *8 connect() failed (111: Connection refused) while connecting to upstream, client: 71.88.108.155, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:5000/favicon.ico", host: "myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com", referrer: "http://myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com/"
2020/08/18 21:31:39 [error] 6434#0: *2 connect() failed (111: Connection refused) while connecting to upstream, client: 71.88.108.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:5000/", host: "myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com"
2020/08/18 21:31:39 [error] 6434#0: *2 connect() failed (111: Connection refused) while connecting to upstream, client: 71.88.108.155, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:5000/favicon.ico", host: "myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com", referrer: "http://myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com/"
2020/08/18 21:55:47 [error] 6434#0: *6 connect() failed (111: Connection refused) while connecting to upstream, client: 71.88.108.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:5000/", host: "myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com"
2020/08/18 21:55:47 [error] 6434#0: *6 connect() failed (111: Connection refused) while connecting to upstream, client: 71.88.108.155, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:5000/favicon.ico", host: "myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com", referrer: "http://myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com/"
2020/08/18 22:02:46 [error] 6434#0: *9 connect() failed (111: Connection refused) while connecting to upstream, client: 71.88.108.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:5000/", host: "myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com"
2020/08/18 22:02:46 [error] 6434#0: *9 connect() failed (111: Connection refused) while connecting to upstream, client: 71.88.108.155, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:5000/favicon.ico", host: "myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com", referrer: "http://myblogsylas-env.eba-t2rnydtb.us-east-2.elasticbeanstalk.com/"
2020/08/18 22:03:52 [error] 6434#0: *13 connect() failed (111: Connection refused) while connecting to upstream, client: 209.17.97.2, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:5000/", host: "3.131.11.237:80"
2020/08/18 22:17:34 [error] 6434#0: *15 connect() failed (111: Connection refused) while connecting to upstream, client: 102.165.30.57, server: , request: "GET / HTTP/1.0", upstream: "http://127.0.0.1:5000/"

【问题讨论】：

“单击 Elastic Beanstalk 中的日志选项卡”您必须下载日志。你试过吗？ @Marcin 嗨，我只是从 Elastic Beanstalk 下载日志，不知道数据库或 yml 文件哪里出了问题。嗨。问题在于应用程序流，这将是您的应用程序。如果你 ssh 进入实例，你可以从内部卷曲它吗，例如，curl http://127.0.0.1:5000 或者它正在运行的哪个端口。 @Marcin 嗨，我不太明白“从内部卷曲它，例如 curl 127.0.0.1:5000”。我该怎么办？谢谢！我的意思是，您确定您的应用程序可以在端口 5000 上的实例上运行吗？也许它崩溃了，或者使用了不同的端口，或者不接受任何连接？ 【参考方案1】：

您需要将 Elastic Beanstalk 的安全组添加到 RDS 的入站规则中。您还可以添加您的 IP 地址以允许从本地连接。 https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/rds-external-defaultvpc.html

【讨论】：

我按照您的回答，将 EB 的安全组添加到 RDS 的入站规则（类型为 http）。但是仍然会出现同样的错误你能用本地连接吗，比如从mysqlworkbench？是的，我已经编辑了 RDS 安全组的入站角色，将类型设置为所有流量和来源，例如 0.0.0.0/0。我可以从没有架构的 mysql 工作台连接到 rds。您如何在弹性 beanstalk 上指定您的 rds 连接详细信息。环境变量？上面写着Unknown database 'database-myblog'。你创建数据库了吗？ Spring 不会为您创建它。

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