部署在Elastic Beanstalk Java环境上的Spring Boot应用程序返回502 [英] Spring Boot Application deployed on Elastic Beanstalk Java environment returns 502

问题描述

我正在尝试使用AWS的Java配置(而不是其Tomcat配置)在AWS Elastic Beanstalk上部署一个非常简单的Spring Boot应用程序，但是在以下日志中我始终收到502错误:

I'm trying to deploy a very simple Spring Boot application on AWS Elastic Beanstalk using AWS's Java configuration (not their Tomcat configuration), but I keep getting a 502 error with the following log:

2016/06/10 02:00:14 [error] 4921#0: *1 connect() failed 
(111: Connection refused) while connecting to upstream, client: 38.94.153.178,   
server: , request: "GET /test HTTP/1.1", upstream:   "http://127.0.0.1:5000/test",
host: "my-single-instance-java-app.us-east-1.elasticbeanstalk.com"

我尝试通过Spring的application.properties将端口设置为日志似乎想要的值(使用server.port=5000使用5000)，并已验证我的应用程序已在本地主机的该端口上成功运行.

I've tried setting my port via Spring's application.properties to what the log seems to want (5000, using server.port=5000) and have verified that my application runs successfully on that port on localhost.

这个问题非常相似，除了我要部署一个JAR而不是WAR.在配置Nginx方面似乎缺少了一些东西，我也不知道该如何进行.

This question is very similar, except that I'm deploying a JAR instead of a WAR. It seems like there is something I'm missing regarding configuring Nginx, and I don't know how to proceed.

这是我的Spring应用程序:

Here's my Spring Application:

@SpringBootApplication
public class MyApplication {

    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }

    @RestController
    public static class MainController {

        @RequestMapping("/test")
        public String testMethod() {
            return "Method success!";
        }
    }
}

推荐答案

Nginx不知道Spring Boot应用程序在哪个端口上运行. 通过在最后一步中将"server.port = 5000"添加到application.properties或其他建议的方式，使应用程序在Nginx默认重定向到的端口5000上运行:

Nginx doesn't know on which port your spring boot applicaiton is running. Make application run on port 5000 that Nginx redirects to by default by adding "server.port=5000" to application.properties or other suggested ways in the last step:

https://pragmaticintegrator.wordpress.com/2016/07/12/run-your-spring-boot-application-on-aws-using-elastic-beanstalk/

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