Build with Docker

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WaveMaker supports micro-service-enabled architecture. This allows you to build and deploy applications using container-based technology. Docker is a platform as a service that uses virtualization to deliver software in packages called containers. Containers are isolated from one another and bundle their own software, libraries, and configuration files.

For creating a Docker container, you create a Docker image by building a Dockerfile. For this, you require node and npm as prerequisites for building an application with maven and java.

System prerequisites

Description	Version
Java	1.8
Node	12.22
Maven	3.8
npm	6.14
Ant	1.10

Build Docker Image

Export the project to your local, or you can directly clone from a repository. You should keep the Dockerfile in the root directory of the project.

Creating a Dockerfile

To create a Dockerfile, use the following command.

vi Dockerfile

You can use the following Dockerfile for building Docker images and create Docker containers by using multi-stage Dockerfile. You can decrease the size of the Docker image and can create lightweight containers as well.

FROM maven:3.8.1-jdk-8 as maven-java-node
ENV MAVEN_CONFIG=~/.m2
RUN mkdir -p /usr/local/content/node
WORKDIR /usr/local/content/node
ADD https://nodejs.org/dist/v12.22.3/node-v12.22.3-linux-x64.tar.gz .
RUN tar -xzf node-v12.22.3-linux-x64.tar.gz \
    && ln -s /usr/local/content/node/node-v12.22.3-linux-x64/bin/node /usr/local/bin/node \
    && ln -s /usr/local/content/node/node-v12.22.3-linux-x64/bin/npm /usr/local/bin/npm \
    && chown -R root:root /usr/local/content/node \
    && rm -fR node-v12.22.3-linux-x64.tar.gz

FROM maven-java-node as webapp-artifact
RUN mkdir -p /usr/local/content/app
ADD ./ /usr/local/content/app
WORKDIR /usr/local/content/app
ARG build_profile_name
ENV profile=${build_profile_name}
RUN  mvn clean install -P${profile}

FROM tomcat:8.5.50
COPY --from=webapp-artifact /usr/local/content/app/target/*.war /usr/local/tomcat/webapps/

Save the above Docker file.

Create Docker Image

Build a Docker image by using the below Docker command with different build profiles. You can choose to build with the following build profiles, including development and deployment.

docker image build --build-arg build_profile_name=<deployment-profile> -t <imagename:version> <project_location>

Example: docker image build --build-arg build_profile_name=deployment -t wmimage:1.0 .

For more information, see Development Profile and Deployment Profile.

Check Handling Build Failures if build failed.

Run Docker Container

For creating a Docker container, use the below Docker command.

note

You can provide any host_port. For example, 80. The internal port of the container is fixed and not changeable.

docker container run --name <containername> -d -p <host_port>:8080 <imagename:version>

example: docker container run --name wmapp -d -p 80:8080 wmimage:1.0

Access Application

If Docker is running on the Host network, use the Host IP address to access the application on the web. Get an Instance IP Address using the following command to access the application on the web. Please run the below command in the web application hosting Instance.

ifconfig

• Above command will provide the network interfaces and their respective IP Address in Instance. Please use the respective IP Address to access the application on the web. You can access the application with http://<HOST_IP:HOST_PORT>/<APPLICATION_CONTEXT>/.

Build War File Using Docker

• Export the project to your local, or you can directly clone from a repository. You should keep the Dockerfile in the project's root directory and mount the application directory location to /usr/local/content/app during container creation for generating application war.

Create Docker File

To create a wm app builder Dockerfile, use the following command.

vi Dockerfile.build

You can use the following Dockerfile to build Docker images and create Docker containers for creating project war files.

FROM maven:3.8.1-jdk-8 as maven-java-node
ENV MAVEN_CONFIG=~/.m2
# installing node 12.22 and npm 6.14 in docker container
RUN mkdir -p /usr/local/content/node
WORKDIR /usr/local/content/node
ADD https://nodejs.org/dist/v12.22.3/node-v12.22.3-linux-x64.tar.gz .
RUN tar -xzf node-v12.22.3-linux-x64.tar.gz \
    && ln -s /usr/local/content/node/node-v12.22.3-linux-x64/bin/node /usr/local/bin/node \
    && ln -s /usr/local/content/node/node-v12.22.3-linux-x64/bin/npm /usr/local/bin/npm \
    && chown -R root:root /usr/local/content/node \
    && rm -fR node-v12.22.3-linux-x64.tar.gz

# stage for build the code
FROM maven-java-node
RUN mkdir -p /usr/local/content/app \
    && chown -R root:root /usr/local/content/app
WORKDIR /usr/local/content/app
CMD  mvn clean install -P${profile} && mkdir -p dist && cp -fr target/*.war dist/

Save the above Dockerfile.build.

Create Docker Image

Build the Docker image using the below command

docker image build -t <image-name>:1.0 -f Dockerfile.build <project_location>

example: docker image build -t wavemaker/wm-app-builder:1.0 -f Dockerfile.build .

Build Project war

Create a Docker container to generate a war. Please use the below command.

docker container run --rm -it --name <container-name> -v $HOME/.m2:$HOME/.m2 -v $HOME/.npm:$HOME/.npm -v <project-location>:/usr/local/content/app -e profile=<deployment-profile> -e MAVEN_CONFIG=$HOME/.m2 <image-name>

example: docker container run --rm -it --name wmapp -v $HOME/.m2:/root/.m2 -v $HOME/.npm:/root/.npm -v /home/user/MySampleApp:/usr/local/content/app -e profile=deployment -e MAVEN_CONFIG=$HOME/.m2 wavemaker/wm-app-builder:1.0

Run Container

• After Completing the build, it will create a project war file in the <project-location>/dist folder. Users can use the war file to deploy in the Host tomcat or Tomcat Docker container.
• For deploying project war using Tomcat Docker container, please use the below command.

docker container run -d --name <container-name> -v <project-location>/dist/:/usr/local/tomcat/webapps/ -p <host_port>:8080 tomcat:8.5

example: docker container run -d --name wm-app -v /home/user/MySampleApp/dist/:/usr/local/tomcat/webapps/ -p 80:8080 tomcat:8.5

Access Application

If Docker is running on the Host network, use the Host IP address to access the application on the web. Get an Instance IP Address using the following command to access the application on the web. Please run the below command in the web application hosting Instance.

ifconfig

• Above command will provide the network interfaces and their respective IP Address in Instance. Please use the respective IP Address to access the application on the web. You can access the application with http://<HOST_IP:HOST_PORT>/<APPLICATION_CONTEXT>/.

Build War File Using wm-app-builder Docker Image

The wm-app-builder Docker image is packed with required software packages and libraries to deploy WaveMaker Application in Docker containers.

• Using the wm-app-builder Docker image, users can generate war files for WaveMaker applications.
• Find WaveMaker wm-app-builder Docker image at wm-app-builder Docker Image in Docker Hub.