Spring Boot on Elastic Beanstalk worker tier

Question

I am trying to deploy a spring boot app into one EB worker tier but seems that EB it is not ready to manage this kind of project.

Have I to mandatory generate a .war from my spring boot app?

Thanks!

Answer 1

I have found the problem.

EB expects a .war file and Spring Boot app usually is launche by a embedded Tomcat or Jetty.

I have found the solution in this guide:

http://spring.io/guides/gs/convert-jar-to-war/

Summing up:

1. Add tomcat dependency with provided scope in pom.xml

   <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-tomcat</artifactId>
       <scope>provided</scope>
   </dependency>
   

2. Create a class extending SpringBootServletInitializer and load the entrypoint within this class. This way, we are indicating to the servlet container how to launch the app.

   package com.proyecti.magma.conversionsworker.config.servlet;
   
   import org.springframework.boot.builder.SpringApplicationBuilder;
   import org.springframework.boot.context.web.SpringBootServletInitializer;
   
   import com.proyecti.magma.conversionsworker.entrypoint.Application;
   
   public class ServletConfig extends SpringBootServletInitializer
   {
       @Override
       protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
           return application.sources(Application.class);
       }
   
   }