Installing Java in Docker image

Question

This is my very first try to create a Docker image and I'm hoping someone can help me out. My Dockerfile looks roughly like this:

FROM mybaseimage:0.1 MAINTAINER ...  ENV JAVA_HOME /usr/lib/jvm/java-7-openjdk-amd64 RUN sed 's/main$/main universe/' -i /etc/apt/sources.list  ENV DEBIAN_FRONTEND noninteractive  RUN apt-get update  RUN apt-get install -y openjdk-7-jre && apt-get clean &&\              mkdir temp_dir  &&   cd temp_dir && \              ${JAVA_HOME}/bin/jar -xvf somejar.jar  &&\              cd .. ENTRYPOINT ["somescript.sh"] 

Basically I'm only installing Java so I can expand a jar file. When I run my makefile I get the following error:

/bin/sh: 1: /usr/lib/jvm/java-7-openjdk-amd64: Permission denied

I've been trying to follow this example: https://registry.hub.docker.com/u/barnybug/openjdk-7-jre/dockerfile/

Edit: per request in the comment here is my makefile:

DOCKER_REGISTRY=registry.mycompany.com DOCKER_IMAGE=appimage-myapp DOCKER_TAG=3.0  SUDO=  ARCHIVE_NAME=$(DOCKER_IMAGE):$(DOCKER_TAG)   REPO_ARCHIVE_NAME=$(DOCKER_REGISTRY)/$(ARCHIVE_NAME)   BASE_IMAGE_ARCHIVE=$(DOCKER_IMAGE)_$(DOCKER_TAG).tar.gz  all: $(BASE_IMAGE_ARCHIVE)  .PHONY: docker_image  docker_image: Dockerfile     $(SUDO) docker build -t $(ARCHIVE_NAME) .  $(BASE_IMAGE_ARCHIVE): docker_image   $(SUDO) docker tag -f $(ARCHIVE_NAME) $(REPO_ARCHIVE_NAME)   $(SUDO) docker push $(REPO_ARCHIVE_NAME)   $(SUDO) docker save $(ARCHIVE_NAME) | gzip -c > $@   $(SUDO) docker rmi $(REPO_ARCHIVE_NAME) 

which I run with

make docker_image SUDO=sudo 

Answer 1

I was able to install OpenJDK 8 via the steps below (taken from here). My Dockerfile inherits from phusion/baseimage-docker, which is based on Ubuntu 16.04 LTS.

# Install OpenJDK-8 RUN apt-get update && \     apt-get install -y openjdk-8-jdk && \     apt-get install -y ant && \     apt-get clean;      # Fix certificate issues RUN apt-get update && \     apt-get install ca-certificates-java && \     apt-get clean && \     update-ca-certificates -f;  # Setup JAVA_HOME -- useful for docker commandline ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64/ RUN export JAVA_HOME 

To install OpenJDK 7 instead, you may need to prepend

add-apt-repository ppa:openjdk-r/ppa 

such that the first step becomes

# Install OpenJDK-7 RUN add-apt-repository ppa:openjdk-r/ppa && \     apt-get update && \     apt-get install -y openjdk-7-jdk && \     apt-get install -y ant && \     apt-get clean; 

I hope this helps.

Answer 2

I was able to install Java-11 on an image using Ubuntu 18.04. I also just needed it for only one application. (The Python wrapper around Apache Tika.)

FROM python:3.8.2-buster COPY . /usr/src/app  # Install OpenJDK-11 RUN apt-get update && \     apt-get install -y openjdk-11-jre-headless && \     apt-get clean;  # Install PYTHON requirements COPY requirements.txt ./ RUN pip install --no-cache-dir -r requirements.txt  # START WEBAPP SERVICE CMD [ "python", "/usr/src/app/main.py" ] 

Hope that helps.