Since 3.12.0 filesystem write access during container build IT tests results in AccessDeniedException

[HerrDerb]

Describe the bug

I have an application that creates dirs and writes files to the file system. In production, this directory is mounted. During test we used to write directly into the container.

With the update to 3.12.0 this seem not to be possible anymore as we get a AccessDeniedException: java.nio.file.AccessDeniedException: /home/jboss/myDir

Expected behavior

No change. Writing to the filesystem during a containerized test should still be possible

How to Reproduce?

https://github.com/HerrDerb/quarkus-issue/tree/container-write

• ./mvnw verify -Dquarkus.container-image.build=true -DskipITs=false

when running with 3.12.0 the IT test will fail -> see target/quarkus.log
when run with 3.11.3 the IT test will succeed

[geoand]

This is really weird. From 3.12 the container logs:

/opt/jboss/container/java/run/run-java.sh: line 147: /opt/jboss/container/java/jvm/java-default-options: Permission denied
/opt/jboss/container/java/run/run-java.sh: line 150: /opt/jboss/container/java/jvm/debug-options: Permission denied
INFO exec -a "java" java -Djava.util.logging.manager=org.jboss.logmanager.LogManager -cp "." -jar /home/jboss/quarkus-run.jar 
INFO running in /home/jboss
/opt/jboss/container/java/run/run-java.sh: line 147: /opt/jboss/container/java/jvm/java-default-options: Permission denied
/opt/jboss/container/java/run/run-java.sh: line 150: /opt/jboss/container/java/jvm/debug-options: Permission denied

where those Permission denied entries don't exist for 3.12. I have yet to discover what causes the problem...

[geoand]

@galderz this seems to be caused by 7493ab4, where we are using user 1000 for launching the container. This is incorrect for the container image created by Jib when running with Docker.

What was the reasoning behind this change?

[geoand]

Maybe we should only do call getVolumeAccessArguments when volumeMounts are not empty?