Entrypoint example with run-java-sh

Environment: N/A

• Jib version: latest
• Build tool: Maven
• OS: Mac

Description of the issue:

run-java-sh describes itself as a “universal startup script for Java applications, especially crafted for being run from within containers”.

I understand Jib can offer <entrypoint> configs, yet would like to see an example of how this can be configured when there are external dependencies that include such scripts.

Expected behavior:

Example or documentation how to include external dependencies that include entrypoint scripts.

Additional details:

Mostly interested in the dynamic memory calculation functions

No, haven’t tried it 🙂

Not sure if works for your packaging layout, or requires a JAR - ref. bash script

[chanseokoh]

which I know would eventually get pulled into target/

If this is the case and as long as the file exists at target/foo/bar/entrypoint.sh by the time Jib runs (by whatever means, by maven-resources-plugin, whether extracted from a dependency somehow, etc.), you should be able to copy that file into an image (e.g., at /script/entrypoint.sh) using <extraDirectories>. Just make sure the file gets placed before the Jib plugin runs. And note, then, the entrypoint you should set should be <entrypiont>/script/entrypoint.sh (i.e., the path inside the image). Basically, I don’t see anything particularly interesting about this scenario; Jib can copy what it can see into an image, and you set the image entrypoint to whatever suits you.

[OneCricketeer]

we have no plan to natively support this scenario

AFAICT, using an entrypoint script is a regularly asked scenario ( https://github.com/GoogleContainerTools/jib/issues/3147#issuecomment-820629454 for example would be useful for exposing the class name to the script ) , not sure if it matters if it is part of the project, the base image, or external.

My question was asking how that can be done from a dependency, which I know would eventually get pulled into target/, so should I be able to reference <entrypoint>${project.build.directory}/foo/bar/entrypoint.sh</entrypoint>, assuming something has already placed a file there (for example, the maven-resources-plugin)?