Multiplatform image with spring-boot separate layers from fatjar

[davidecavestro]

Hi, I'm trying to generate a multiplatform image to package and distribute in separate layers the contents of a spring boot fatjar.
But so far I cannot find a valid combination of config: as soon as the fatjar layers are added, the multiple platform config is ignored, and vice versa.

Any idea?

This is an example pom.xml for kubernetes-maven-plugin.

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.acme</groupId>
    <artifactId>test</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <maven.compiler.target>17</maven.compiler.target>
        <maven.compiler.source>17</maven.compiler.source>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <version>3.4.5</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>3.4.5</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.eclipse.jkube</groupId>
                <artifactId>kubernetes-maven-plugin</artifactId>
                <version>1.18.1</version>
                <configuration>
                    <buildStrategy>jib</buildStrategy>
                    <generator>
                        <includes>
                            <include>spring-boot</include>
                        </includes>
                        <config>
                            <spring-boot>
                                <!-- <from>eclipse-temurin:17</from> -->
                                <name>localhost:5000/${project.artifactId}:${project.version}</name>
                                <targetDir>/app</targetDir>
                                <add>true</add>
                            </spring-boot>
                        </config>
                    </generator>
                      <images>
                        <image>
                            <name>localhost:5000/${project.artifactId}:${project.version}</name>
                            <build>
                                <from>eclipse-temurin:17</from>
                                <platforms>linux/amd64,linux/arm64</platforms>
                            </build>
                        </image>
                    </images>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

[davidecavestro]

So I stumbled upon #3642, suggesting the usage of
-Djkube.container-image.platforms.1=linux/amd64 -Djkube.container-image.platforms.2=linux/arm64
which actually works...