On a previous blog we integrated a spring boot application with EC2. It is one of the most raw forms of deployment that you can have on Amazon Web Services.
On this tutorial we will create a docker image with our application which will be stored to the Amazon EC2 container registry.
You need to have the aws cli tool installed.
We will get as simple as we can with our spring application therefore we will use an example from the official spring source page. The only changes applied will be on the packaging and the application name.
Our application shall be named ecs-deployment
rootProject.name = 'ecs-deployment'
Then we build and run our application
gradle build gradle bootRun
Now let’s dockerize our application.
First we shall create a Dockerfile that will reside on src/main/docker.
FROM frolvlad/alpine-oraclejdk8 VOLUME /tmp ADD ecs-deployment-1.0-SNAPSHOT.jar app.jar RUN sh -c 'touch /app.jar' ENV JAVA_OPTS="" ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar" ]
Then we should edit our gradle file in order to add the docker dependency, the docker plugin and an extra gradle task in order to create our docker image.
buildscript {
...
dependencies {
...
classpath('se.transmode.gradle:gradle-docker:1.2')
}
}
...
apply plugin: 'docker'
task buildDocker(type: Docker, dependsOn: build) {
push = false
applicationName = jar.baseName
dockerfile = file('src/main/docker/Dockerfile')
}And we are ready to build our docker image.
./gradlew build buildDocker
You can also run your docker application from the newly created image.
docker run -p 8080:8080 -t com.gkatzioura.deployment/ecs-deployment:1.0-SNAPSHOT
First step is too create our ecr repository
aws ecr create-repository --repository-name ecs-deployment
Then let us proceed with our docker registry authentication.
aws ecr get-login
Then run the command given in the output. The login attempt will succeed and your are ready to proceed to push your image.
First tag the image in order to specify the repository that we previously created and then do a docker push.
docker tag {imageid} {aws account id}.dkr.ecr.{aws region}.amazonaws.com/ecs-deployment:1.0-SNAPSHOT
docker push {aws account id}.dkr.ecr.{aws region}.amazonaws.com/ecs-deployment:1.0-SNAPSHOTAnd we are done! Our spring boot docker image is deployed on the Amazon EC2 container registry.
You can find the source code on github.
| Reference: | Push Spring Boot Docker images on ECR from our JCG partner Emmanouil Gkatziouras at the gkatzioura blog. |
