Java 11 app on Docker

This is a follow up article for Java 8 app on Docker.

Using openjdk:11

Create Dockerfile as

FROM adoptopenjdk:11-jre-hotspot

COPY target/demo-0.0.1-SNAPSHOT.jar /usr/app/

WORKDIR /usr/app

ENTRYPOINT ["java","-jar","demo-0.0.1-SNAPSHOT.jar"]

Image created is heavy and would be about 250MB (excluding your jar file size).

https://hub.docker.com/_/adoptopenjdk

Using alpine:latest

Create Dockerfile as

FROM alpine:latest

RUN apk update && \

    apk add --upgrade openjdk11-jre-headless

COPY target/emergency-0.0.1-SNAPSHOT.jar /usr/app/emergency.jar

WORKDIR /usr/app

ENTRYPOINT ["java","-jar","emergency.jar"]

This creates an image that is about 200MB (excluding your jar file size).

Creating image and running it

Create image

    docker build -t demo-spring-boot-app:0.0.1 .

Run Image

    docker run --rm -p 80:8080 --name demo-spring-boot-application demo-spring-boot-app:0.0.1