How to build docker image with maven?

Question

I have to build a docker image and package java application using maven in the docker container but when I run the build process all is going fine but all maven dependencies downloading from maven remote repo.

That is my docker file:

FROM ubuntu_img
CMD ./mvnw -s .mvn/settings.xml --batch-mode clean package

How can I configure docker or maven for downloading dependencies from maven local repository located on my laptop?

@pmverma no I have to run the maven build in the docker container because all tests have to be executed in the docker environment. — John
– John, Commented Oct 9, 2019 at 7:56
You can also map local m2 repo to container m2 repo in which case it won't download from remote. — pmverma
– pmverma, Commented Oct 9, 2019 at 8:02
With docker experimental features enabled and using buildkit you can mount a cache volume during the builds, check this answer. — masseyb
– masseyb, Commented Oct 9, 2019 at 8:14

zappee · Accepted Answer · 2019-10-09 09:15:15Z

3

At first, you need to attach the directory of your existing local Maven repository into the Docker container:

VOLUME ["/home/<user>/.m2", "/root/.m2"]

Then you need to tell Maven (inside your container) to use this directory as a local repository.

setting.xml

<settings ...>
    <localRepository>/root/.m2</localRepository>
    ...
</settings>

edited Oct 9, 2019 at 9:15

answered Oct 9, 2019 at 8:59

zappee

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8 Comments

John Over a year ago

where I should write VOLUME ["/home/<user>/.m2", "/root/.m2"] in my docker file?

zappee Over a year ago

You need to add 'VOLUME ...' into the docker-compose.yml file. More info here: blog.code4hire.com/2018/06/…

zappee Over a year ago

More examples are here: stackoverflow.com/questions/42248198/…

John Over a year ago

Can I mount the volume in docker file on build image step without docker-compose.yml file?

zappee Over a year ago

This is a different question. I think that, the best you can do is to complete this question then you can search for it on the Internet or ask a new question.

|

Willing · Accepted Answer · 2019-10-09 08:05:08Z

0

use volume,like this:

VOLUME ["/home/test/.m2", "/root/.m2"]

answered Oct 9, 2019 at 8:05

Willing

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