docker-maven java11
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Dockerizing a Maven Java 11 Application
Introduction
Docker is a popular platform for containerizing applications. It allows developers to package their applications and their dependencies into a single container, which can then be run on any system that has Docker installed. In this article, I will guide you through the process of Dockerizing a Maven Java 11 application.
Prerequisites
Before we begin, make sure you have the following installed on your system:
- Docker: You can download and install Docker from the official Docker website.
Process Overview
Below is a step-by-step process for Dockerizing a Maven Java 11 application:
journey
title Dockerizing a Maven Java 11 Application
section Clone the Maven Java 11 Application
section Create a Dockerfile
section Build the Docker Image
section Run the Docker Container
Now, let's go through each step in detail.
Step 1: Clone the Maven Java 11 Application
First, you need to clone the Maven Java 11 application that you want to Dockerize. Use the following command to clone the repository:
git clone <repository-url>
Replace <repository-url>
with the URL of the Git repository.
Step 2: Create a Dockerfile
Once you have cloned the application, navigate to the root directory of the project. Create a file named Dockerfile
in the project's root directory. The Dockerfile
is used to define the instructions for building the Docker image.
Open the Dockerfile
in a text editor and add the following code:
# Use the official Maven 3.6.3 image as the base image
FROM maven:3.6.3-openjdk-11-slim
# Set the working directory in the container
WORKDIR /app
# Copy the pom.xml and src directory to the working directory
COPY pom.xml .
COPY src ./src
# Build the Maven project
RUN mvn package
# Set the entry point for the container
ENTRYPOINT ["java", "-jar", "target/your-application.jar"]
Let's understand the code in the Dockerfile
:
FROM maven:3.6.3-openjdk-11-slim
: This line specifies the base image to use for the Docker image. In this case, we are using the official Maven 3.6.3 image with OpenJDK 11.WORKDIR /app
: This line sets the working directory in the container to/app
.COPY pom.xml .
: This line copies thepom.xml
file from the local directory to the working directory in the container.COPY src ./src
: This line copies the entiresrc
directory from the local directory to the working directory in the container.RUN mvn package
: This line builds the Maven project inside the container.ENTRYPOINT ["java", "-jar", "target/your-application.jar"]
: This line specifies the entry point command for the container. It runs the Java application using theyour-application.jar
file located in thetarget
directory.
Save the Dockerfile
and close the text editor.
Step 3: Build the Docker Image
Now that we have created the Dockerfile
, we can build the Docker image using the following command:
docker build -t your-image-name .
Replace your-image-name
with the desired name for the Docker image.
The docker build
command reads the instructions from the Dockerfile
and builds the Docker image accordingly. The -t
option is used to tag the image with the given name.
Step 4: Run the Docker Container
Once the Docker image is built, we can run a Docker container using the following command:
docker run -d -p 8080:8080 your-image-name
Replace your-image-name
with the name of the Docker image you built in the previous step.
The docker run
command creates and starts a new Docker container based on the specified image. The -d
option runs the container in detached mode, and the -p
option maps the container's port 8080 to the host's port 8080.
Congratulations! You have successfully Dockerized a Maven Java 11 application. You can now access your application by navigating to http://localhost:8080
in your web browser.
Conclusion
Docker provides an efficient way to package and distribute applications with their dependencies. In this article, we learned how to Dockerize a Maven Java 11 application using a step-by-step process. By following these steps, you can easily containerize your own Java applications and deploy them in any environment that supports Docker.
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阿里云国际,腾讯云国际,低至75折。AWS 93折 免费开户实名账号 代冲值 优惠多多 微信号:monov8 飞机:@monov6 |