Unable to access jarfile when running Docker image

Question

I am novice to Spring Boot Microservices and Docker.

The dockerfile in microservice project:

docker build:

docker images:

when running the image, there is an error: Unable to access jarfile register_server.jar

Cheers, Sean

Answer 1

You need to specify either the absolute target path or set the WORKDIR

Dockerfile Reference - Add

https://docs.docker.com/engine/reference/builder/#add

The <dest> is an absolute path, or a path relative to WORKDIR, into which the source will be copied inside the destination container. For example:

ADD test relativeDir/          # adds "test" to `WORKDIR`/relativeDir/
ADD test /absoluteDir/         # adds "test" to /absoluteDir/