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Ensure you have Docker installed on your machine. You can download and install Docker from the official Docker website.
Create a file named Dockerfile in your project directory. The Dockerfile should contain instructions on how to build your Docker image.
Here is a sample Dockerfile for GridWeb demo with java application:
#spring boot3.3 shall use jdk17 above
FROM openjdk:17-jdk-slim AS build
# set work dir
WORKDIR /usr/src/app
# copy with maven
COPY mvnw .
COPY .mvn .mvn
COPY pom.xml .
COPY src src
RUN chmod +x mvnw
# build with maven
RUN ./mvnw package -DskipTests
RUN ls -l target
# Stage 2: Create the final image
FROM openjdk:17-jdk-slim
# Set the working directory in the container
WORKDIR /app
# Copy the built JAR file from the build stage
COPY --from=build /usr/src/app/target/*.jar /app/app.jar
# web port
EXPOSE 8080
# Install Fonts because the SDK image contains very few fonts. The command copies font files from local to docker image. Make sure you have a local “fonts” directory that contains all the fonts you need to install. In this example, the local “fonts” directory is put in the same directory as the Dockerfile.
# COPY fonts/* /usr/share/fonts/
# Install necessary dependencies for font management,because we use jdk-slim ,we need to install it
RUN apt-get update && apt-get install -y fontconfig libfreetype6 && rm -rf /var/lib/apt/lists/*
# Set the environment variable for headless mode,no need to use display
ENV JAVA_OPTS="-Djava.awt.headless=true"
# create [log dir](https://github.com/aspose-cells/Aspose.Cells.Grid-for-Java/blob/master/Examples.GridWeb/springboot3.3demo/src/main/resources/application.properties)
RUN mkdir -p /app/log
# create [cache dir](https://github.com/aspose-cells/Aspose.Cells.Grid-for-Java/blob/master/Examples.GridWeb/springboot3.3demo/src/main/resources/application.properties)
RUN mkdir -p /app/grid_cache
# RUN ls -l /app/
# run java application
CMD ["sh", "-c", "java $JAVA_OPTS -jar /app/app.jar"]
Build the Docker Image: From the terminal, execute the following command to build your Docker image:
docker build -t gridweb-demo-java .
you can replace gridweb-demo-java with the name you want to give your Docker image.
Once the image is built, you can run a container using the following command:
docker run -d -p 8080:8080 --name gridweb-demo-container gridweb-demo-java
Explanation of Docker Run Command Options -d: Run the container in detached mode (in the background). -p 8080:8080: Map port 8080 in the container to port 8080 on the host machine. –name gridweb-demo-container: Assign a name to the container.
To check if your container is running, use the following command:
docker ps
This will list all running containers. You should see your container listed along with its name and status.
Open a web browser and go to http://localhost:8080/gridwebdemo/index. You should see your application running.
To stop a running container, use the following command:
docker stop gridweb-demo-container
To remove a stopped container, use the following command:
docker rm gridweb-demo-container
To remove an image, use the following command:
docker rmi gridweb-demo-java
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