VsCode devcontainer development setup for Java 8

README.md

VsCode devcontainer template for Java8 development

TL;DR

• .devcontainer must exist in the root folder of your code.

.devcontainer
├── Dockerfile
├── devcontainer.json
└── maven-settings.xml

• Place the files in this gist.

Additional

• https://bit.ly/32wGenJ

devcontainer.json

// For format details, see https://aka.ms/vscode-remote/devcontainer.json or this file's README at:
// https://github.com/microsoft/vscode-dev-containers/tree/v0.128.0/containers/java-8
{
	"name": "Java 8",
	"dockerFile": "Dockerfile",

	// Set *default* container specific settings.json values on container create.
	"settings": {
		"terminal.integrated.shell.linux": "/bin/bash",
		"java.home": "/docker-java-home"
	},

	// Add the IDs of extensions you want installed when the container is created.
	"extensions": [
		"vscjava.vscode-java-pack"
	],

	// Use 'forwardPorts' to make a list of ports inside the container available locally.
	"forwardPorts": [8080],

	// Use 'postCreateCommand' to run commands after the container is created.
	// "postCreateCommand": "java -version",

	// Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
	"remoteUser": "vscode"
}

Dockerfile

#-------------------------------------------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
#-------------------------------------------------------------------------------------------------------------

FROM openjdk:8-jdk

# This Dockerfile adds a non-root user with sudo access. Use the "remoteUser"
# property in devcontainer.json to use it. On Linux, the container user's GID/UIDs
# will be updated to match your local UID/GID (when using the dockerFile property).
# See https://aka.ms/vscode-remote/containers/non-root-user for details.
ARG USERNAME=vscode
ARG USER_UID=1000
ARG USER_GID=$USER_UID

# Configure apt
RUN apt-get update \
    && export DEBIAN_FRONTEND=noninteractive \
    && apt-get -y install --no-install-recommends apt-utils dialog 2>&1 \
    #
    # Create a non-root user to use if preferred - see https://aka.ms/vscode-remote/containers/non-root-user.
    && groupadd --gid $USER_GID $USERNAME \
    && useradd -s /bin/bash --uid $USER_UID --gid $USER_GID -m $USERNAME \
    # [Optional] Add sudo support for the non-root user
    && apt-get install -y sudo \
    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME\
    && chmod 0440 /etc/sudoers.d/$USERNAME \
    #
    # Verify git, needed tools installed
    && apt-get -y install git openssh-client less iproute2 procps curl lsb-release

#-------------------Uncomment the following steps to install Maven CLI Tools----------------------------------
ARG MAVEN_VERSION=3.6.3
ARG MAVEN_SHA=c35a1803a6e70a126e80b2b3ae33eed961f83ed74d18fcd16909b2d44d7dada3203f1ffe726c17ef8dcca2dcaa9fca676987befeadc9b9f759967a8cb77181c0
RUN mkdir -p /usr/share/maven /usr/share/maven/ref \
    && export DEBIAN_FRONTEND=noninteractive \
    && curl -fsSL -o /tmp/apache-maven.tar.gz https://archive.apache.org/dist/maven/maven-3/${MAVEN_VERSION}/binaries/apache-maven-${MAVEN_VERSION}-bin.tar.gz \
    && echo "${MAVEN_SHA} /tmp/apache-maven.tar.gz" | sha512sum -c - \
    && tar -xzf /tmp/apache-maven.tar.gz -C /usr/share/maven --strip-components=1 \
    && rm -f /tmp/apache-maven.tar.gz \
    && ln -s /usr/share/maven/bin/mvn /usr/bin/mvn
COPY maven-settings.xml /usr/share/maven/ref/
ENV MAVEN_HOME /usr/share/maven
ENV MAVEN_CONFIG /root/.m2
#-------------------------------------------------------------------------------------------------------------

#-------------------Uncomment the following steps to install Gradle CLI Tools---------------------------------
# ENV GRADLE_HOME /opt/gradle
# ENV GRADLE_VERSION 5.4.1
# ARG GRADLE_DOWNLOAD_SHA256=7bdbad1e4f54f13c8a78abc00c26d44dd8709d4aedb704d913fb1bb78ac025dc
# RUN curl -sSL --output gradle.zip "https://services.gradle.org/distributions/gradle-${GRADLE_VERSION}-bin.zip" \
#     && export DEBIAN_FRONTEND=noninteractive \
#     && echo "${GRADLE_DOWNLOAD_SHA256} *gradle.zip" | sha256sum --check - \
#     && unzip gradle.zip \
#     && rm gradle.zip \
#     && mv "gradle-${GRADLE_VERSION}" "${GRADLE_HOME}/" \
#     && ln -s "${GRADLE_HOME}/bin/gradle" /usr/bin/gradle
#-------------------------------------------------------------------------------------------------------------

# Clean up
RUN export DEBIAN_FRONTEND=noninteractive \
    && apt-get autoremove -y \
    && apt-get clean -y \
    && rm -rf /var/lib/apt/lists/*

# Allow for a consistant java home location for settings - image is changing over time
RUN if [ ! -d "/docker-java-home" ]; then ln -s "${JAVA_HOME}" /docker-java-home; fi

maven-settings.xml

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
                      https://maven.apache.org/xsd/settings-1.0.0.xsd">
  <localRepository>/usr/share/maven/ref/repository</localRepository>
</settings>