Spring Boot, CDS, and ENV variables

[smoell]

Hi all,

I'm currently taking a closer look at Spring Boot 3.3 and CDS. I was wondering how I can pass ENV variables e.g. SPRING_DATASOURCE_URL (for database connection) to perform the CDS training run.
I tried standard ENV variables, but this isn't working, same for this configuration in Maven:

<configuration>
        <image>
            <name>${env.IMAGE_NAME}</name>
            <buildpacks>
                <buildpack>gcr.io/paketo-buildpacks/amazon-corretto:8.5.0</buildpack>
                <buildpack>gcr.io/paketo-buildpacks/syft:1.47.0</buildpack>
                <buildpack>gcr.io/paketo-buildpacks/executable-jar:6.10.0</buildpack>
                <buildpack>gcr.io/paketo-buildpacks/spring-boot:5.30.0</buildpack>
            </buildpacks>
            <env>
                <SPRING_DATASOURCE_URL>${env.SPRING_DATASOURCE_URL}</SPRING_DATASOURCE_URL>
            </env>
            <env>
                <SPRING_DATASOURCE_PASSWORD>${env.SPRING_DATASOURCE_PASSWORD}</SPRING_DATASOURCE_PASSWORD>
            </env>
            <env>
                <BP_JVM_VERSION>21</BP_JVM_VERSION>
            </env>
            <env>
                <BP_JVM_CDS_ENABLED>true</BP_JVM_CDS_ENABLED>
            </env>
        </image>
</configuration>

[dmikusa]

You should only have one <env> block, try collapsing them. You can have many env variables in that block.

https://docs.spring.io/spring-boot/maven-plugin/build-image.html#build-image.examples.builder-configuration

            <env>
                <SPRING_DATASOURCE_URL>${env.SPRING_DATASOURCE_URL}</SPRING_DATASOURCE_URL>
                <SPRING_DATASOURCE_PASSWORD>${env.SPRING_DATASOURCE_PASSWORD}</SPRING_DATASOURCE_PASSWORD>
                <BP_JVM_VERSION>21</BP_JVM_VERSION>
                <BP_JVM_CDS_ENABLED>true</BP_JVM_CDS_ENABLED>
            </env>

[smoell]

That worked, thank you!