2.5 Deploying the Application

To deploy a Micronaut application you create an executable JAR file by running ./gradlew assemble or ./mvnw package.

The constructed JAR file can then be executed with java -jar. For example:

$ java -jar build/libs/hello-world-all.jar

if building with Gradle, or

$ java -jar target/hello-world.jar

if building with Maven.

The executable JAR can be run locally, or deployed to a virtual machine or managed Cloud service that supports executable JARs.

To publish a layered application to a Docker container registry, configure your Docker image name in build.gradle for Gradle:

dockerBuild {
    images = ["[REPO_URL]/[NAMESPACE]/my-image:$project.version"]
}

Then use dockerPush to push a built image of the application:

$ ./gradlew dockerPush

For Maven, define the following plugin in your POM:

<plugin>
  <groupId>com.google.cloud.tools</groupId>
  <artifactId>jib-maven-plugin</artifactId>
  <configuration>
    <to>
      <image>docker.io/my-company/my-image:${project.version}</image>
    </to>
  </configuration>
</plugin>

Then invoke the deploy lifecycle phase specifying the packaging type as either docker or docker-native:

$ ./mvnw deploy -Dpackaging=docker