Deploy Spring WAR on Tomcat-based docker

Question

I went through Spring Creating a RESTful Web Service tutorial and created a dummy webapp (with instructions "Build with Maven"), I build and package the WAR. Then I run it with this command:

java -jar ./target/Dummy-1.0-SNAPSHOT.war

I see a dummy JSON endpoint at http: // localhost: 8080 / greeting / .

Now I want to containerize the application with Docker, so I can test it again without having to install Tomcat in the system space. This is created by Dockerfile:

FROM tomcat:7-jre8-alpine

# copy the WAR bundle to tomcat
COPY /target/Dummy-1.0-SNAPSHOT.war /usr/local/tomcat/webapps/app.war

# command to run
CMD ["catalina.sh", "run"]

I am creating and running docker binding to http: // localhost: 8080 . I see the Tomcat welcome page on " http: // localhost: 8080 ". But I could not see my application with any of them:

• http: // localhost: 8080 / app /
• http: // localhost: 8080 / app / greeting /
• http: // localhost: 8080 / greeting /

How do I track a problem? What could be the problem?

Update 1: Screenshot of the Tomcat Admin Interface

Answer 1

The file Application.javain the example is as follows:

package hello;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

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

SpringBoot, Tomcat. , :

• redefine Application SpringBootServletInitializer Spring -;

• configure:

  package hello;
  
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.autoconfigure.SpringBootApplication;
  import org.springframework.boot.builder.SpringApplicationBuilder;
  import org.springframework.boot.web.support.SpringBootServletInitializer;    
  
  @SpringBootApplication
  public class Application extends SpringBootServletInitializer {
  
      @Override
      protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
          return application.sources(Application.class);
      }
  
      public static void main(String[] args) {
          SpringApplication.run(Application.class, args);
      }
  
  }
  

pom.xml ( ).

docker , : http://localhost:8080/app/greeting/

• Spring , Tomcat
• Spring :