spring-boot-heroku

Heroku Spring Boot Example With Maven

Table of contents

1. Configure Heroku
   1. Generate SSH Key
   2. Addings Key to Heroku
   3. Create Heroku App
   4. Configure Spring Boot
   5. Configure Heroku Spring Boot Deploy
   6. Deploy Application
   7. Test your Application
2. Next Steps

Configure Heroku

Generate SSH key

ssh-keygen -t rsa

Addings Key to Heroku

heroku keys:add

Create Heroku App

heroku create your-application-name

Configure Spring Boot

Here I'm listing the most important configurations of Spring Boot

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <version>${spring.version}</version>
    <executions>
        <execution>
            <goals>
                <goal>repackage</goal>
            </goals>
            <configuration>
                <finalName>${artifactId}</finalName>
            </configuration>
        </execution>
    </executions>
</plugin>

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <version>2.3.2</version>
    <configuration>
        <finalName>${artifactId}</finalName>
    </configuration>
</plugin>

finalName in spring-boot-maven-plugin and maven-jar-plugin, are very important to fix the name of JAR file, so we can configure the Procfile.

The repackage goal, repackaging an application as an executable JAR/WAR as well as a goal for running the application.

Configure Heroku Spring Boot Deploy

Create Procfile with the content

web: java -Dserver.port=$PORT -jar target/spring-boot-heroku.jar

Deploy Application

git push heroku master

Test your Application

Access the Spring Actuator API:

https://your-application-name.herokuapp.com/health

or

curl https://your-application-name.herokuapp.com/health

Next Steps

Hot deploy on Heroku...