Can't docker run java project image which used jlink tool: Permission denied, unknown error

Environment:

• Jib version: jib core version 0.14.0
• *Build tool: I can’t find anything to use scratch base image with gradle plugin
• OS: Manjaro Arch based linux

Description of the issue: I can’t docker run java project image which used jlink tool. Permission denied, unknown error gives when run executable file.

Expected behavior:

Steps to reproduce:

1. Add the gradle dependency to this example compile group: 'com.google.cloud.tools', name: 'jib-core', version: '0.14.0'
2. Run following task

task dojib {
        def builder = Jib.fromScratch()
        builder.setEntrypoint("/bin/demo")
        builder.setCreationTime(Instant.now())

        builder.addFileEntriesLayer(FileEntriesLayer.builder().addEntryRecursive(Path.of("$buildDir/image/cp"), AbsoluteUnixPath.get('/cp')).build())
        builder.addFileEntriesLayer(FileEntriesLayer.builder().addEntryRecursive(Path.of("$buildDir/image/bin"), AbsoluteUnixPath.get('/bin')).build())
        builder.addFileEntriesLayer(FileEntriesLayer.builder().addEntryRecursive(Path.of("$buildDir/image/conf"), AbsoluteUnixPath.get('/conf')).build())
        builder.addFileEntriesLayer(FileEntriesLayer.builder().addEntryRecursive(Path.of("$buildDir/image/legal"), AbsoluteUnixPath.get('/legal')).build())
        builder.addFileEntriesLayer(FileEntriesLayer.builder().addEntryRecursive(Path.of("$buildDir/image/lib"), AbsoluteUnixPath.get('/lib')).build())

        builder.containerize(Containerizer.to(DockerDaemonImage.named("example")))
}

1. Run the docker image which named “example” and see the error.

Log output:

docker: Error response from daemon: OCI runtime create failed: container_linux.go:349: starting container process caused "exec: \"/bin/demo\": permission denied": unknown.
ERRO[0000] error waiting for container: context canceled

[chanseokoh]

Also I’m not sure if it’ll be easy to create a working image from “scratch”, much like the “FROM scratch” in Dockerfile. You may considering starting from some base image.

def builder = Jib.fromScratch()

[chanseokoh]

Thanks for the update. Just FYI and for future documentation:

Jib Core is a general tool to build a container image, so I am certain you can create a working image as long as you supply the right runtime libraries or use the right base image that already contains the libraries from the right OS/architecture. Even with the Jib Maven plugin (not Jib Core), I was able to build a working jlink application with some tweak and tricks.