You should see the whole process in the Services tool window: the container's build log. IntelliJ IDEA creates a Docker run configuration, which builds an image from the Dockerfile and then runs a container based on that image. As a result, you should see Hello, World! printed to the container log.Ĭlick in the gutter and select Run on 'Docker'. Then Docker runs the java HelloWorld command from inside the /tmp directory. When you start the container, Docker copies the contents of your project's output directory (in this case, the main class HelloWorld.class from /out/production/DockerHelloJava/) to the /tmp directory in the container. This Dockerfile builds an image based on the openjdk:17 image from Docker Hub.
Openjdk docker code#
Paste the following code into the new file:ĬOPY. In the New Java Class dialog, type HelloWorld and press Enter. To do this, in the Project tool window, right-click the src directory, point to New and click Java Class. In the New Project dialog, select New Project and name the project DockerHelloJava.Ĭreate the main Java class file HelloWorld.java in the src directory. The sample application for this tutorial will consist of a single HelloWorld.java file, which prints Hello, World! to the console and exits.įrom the main menu, select File | New | Project.
Openjdk docker how to#
It also shows how to create a Docker image with your application to share it with others.įor more information, see the Docker documentation.Ĭonfigure the Docker daemon connection in IntelliJ IDEA.įor more information, see Enable Docker support. This tutorial describes how to create a Dockerfile for running a simple Java application in a container with OpenJDK 17. You can use Docker to run a Java application in a container with a specific runtime environment. This will call the create users file and then reload the Tomcat server.Run a Java application in a Docker container
Openjdk docker update#
RUN echo 'deb trusty main' > /etc/apt/sources.list & \ echo 'deb-src trusty main' > /etc/apt/sources.list & \Īpt-key adv -keyserver -recv-keys C2518248EEA14886 & \Īpt-get update & \ echo oracle-java $ " echo "" echo "="Īdd one more file in the same directory named as run.sh with following content.
Openjdk docker install#
RUN DEBIAN_FRONTEND =noninteractive apt-get install -y -q python-software-properties software-properties-common RUN echo "deb trusty main universe" > /etc/apt/sources.list To begin this process, create a new folder and then create a file in it named “Dockerfile” with the following content. Let’s create a Dockerfile for the Oracle JDK, which is not available on Docker Hub. It is not necessary to write a Dockerfile for OpenJDK in order to run a simple Java application, because you can obtain the official image of OpenJDK from the Docker Hub repository. Writing a Dockerfile for a simple Java application
This can be overridden upon executing the docker run command.ĪDD - This instruction copies the new files, directories into the Docker container file system at specified destination.ĮXPOSE - This instruction exposes specified port to the host machine. For this post, JAVA_HOME is the variable that is set.ĬMD - Provides the facility to run commands at the start of container. RUN - Runs any UNIX command to build the image.ĮNV - Sets the environment variables. MAINTAINER - Specifies the Dockerfile Author Name and his/her email. For this post, we are using phusion/baseimage as our base image because it is a minimal Ubuntu-based image modified for Docker friendliness. Using docker build, you can start a build that executes all of the command-line instructions contained in the Dockerfile.Ĭommon Dockerfile instructions start with RUN, ENV, FROM, MAINTAINER, ADD, and CMD, among others.įROM - Specifies the base image that the Dockerfile will use to build a new image. A Dockerfile is a simple text file that contains instructions that can be executed on the command line. Introduction to Dockerfilesĭocker builds images by reading instructions from a Dockerfile. Java Dockerize your Java Application Dockerize your Java ApplicationĪ Dockerfile is a fundamental building block used when dockerizing your Java applications, and it is how you can create a Docker image that can be used to create the containers you need for automatic builds.
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