Containerized Development in IntelliJ

Build and run a container with Java, Maven and ssh configured and installed with a non-root user.

Run the container as a remote ssh server that can be used with Jetbrains Gateway to enable remote development in a container.

Prerequisites

• Docker
• Jetbrains Gateway
• ssh

Note: As of writing this file, Jetbrains-Gateway is only available for Jetbrains Ultimate users

Configure User

Change the username and password in Dockerfile

ARG user=jeswins-dev
ARG password=jeswins

Build & Run

docker build -t java-dev-ubuntu .

docker run --name java-dev-ubuntu-v3 -p 2200:22 -p 8080:8080 -v ${HOME}/.m2:/home/jeswins-dev/.m2 -v ${HOME}/Documents/GitHub:/home/jeswins-dev/GitHub -it -d java-dev-ubuntu

Note: change just the username used in the path if it has been changed in Dockerfile

The container should be up and running.

Test the ssh connection:

ssh -vvv jeswins-dev@127.0.0.1 -p 2200

use the username configured if changed; -vvv preferred for debug

make sure that the .m2/ and and GitHub/ folders are writable by the USER set in the environment

if not, execute chown -R $USER $HOME/.m2 $HOME/GitHub inside the container.

// if you get the error
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
// run
gawk -i inplace '!/127.0.0.1/' ~/.ssh/known_hosts

clear known_hosts before starting a session into a new container; This is assuming your host keys are stored in $HOME/.ssh

Once the container is up and running, launch Jetbrains Gateway and follow the steps given at Connect and work with JetBrains Gateway

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