How to resolve “Cannot retrieve .Id from docker” when building Docker image using Jenkins pipeline

Question

I am using a Jenkins pipeline to build a Dockerfile.

The dockerfile successfully goes through all steps, and creates the docker image.

As shown:

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Answer 1

I'm getting this problem because I'm using --target= to build my image only up to a certain point.

So my Dockerfile looks like this

FROM maven:3.6-jdk-8 AS BUILD

.. do build ..

FROM openjdk:8

COPY --from=BUILD /myapp/bin my_jar_file

And my build with docker.build(, "--target=BUILD .") fails with:

java.io.IOException: Cannot retrieve .Id from 'docker inspect openjdk:8'

This is because Jenkins is trying to inspect the second FROM openjdk:8 in the Dockerfile, and because that target didn't run Docker didn't pull down that image and it's unavailable to docker inspect

I've got a bunch of workarounds available to me:

1. Ensure that image is available anyway by running docker pull openjdk:8 before building
2. Remove --target=BUILD from my docker.build command and let it build the whole thing (not too big a deal for me as the build is the most expensive part)
3. Avoid using docker.build and just sh "docker build --target=BUILD .

At the moment I'm not sure which one I'll go with