Question Docker complains about missing command. Am I doing it right?

[tekki]

Server operating system version

Ubuntu 18.04.6 LTS

Plesk version and microupdate number

Plesk Obsidian 18.0.45 Update #2

Hi.

I'm trying to deploy a Spring Boot application that works on my existing server using Plesk.

I'll briefly describe what I've done so far:

- Create a standalone .jar file
- Create Dockerfile:

FROM amazoncorretto:17-alpine-jdk
COPY jars/data.jar app.jar
EXPOSE 8080
ENTRYPOINT ["java","-jar","/app.jar"]

- build the image: docker build -t data .
- tested the image locally -> worked.
- tested the image with DockerDesktop -> worked.

- save docker image:

docker save --output data.tar data

- upload the image to my server using the plesk ui (existing installation of plesk with newly installed docker extension)
Something, what i observed here, the name is always something like 'sha256:13e98', no matter what my file is called.
- click the 'Run(local)'
- click the 'ok'

And then i got this error:

Error: {"message":"No command specified"}

I'm very new to Docker containers, and maybe I made a mistake somewhere, so that's how I describe it. Can someone tell me if I'm doing something wrong? I also try it with the CMD instead of ENTERPOINT and also on top. Everything leads to the same message and the message only leads to the information that CMD is missing.

But I have a feeling that it might not be because of that.

Greetings.

 

[tekki]

Dear tekki,

everything looks nice and it should work,
the plesk upload button somehow destroys the image.

We've known about it since at least 2017,
but you can work around plesk like this:
Question - Docker Image

Greetings.