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JAVA

Change JAVA version

$ export JAVA_HOME=(/usr/libexec/java_home -v 1.8)

Spring Boot Docker

FROM maven:3-jdk-8 AS build
WORKDIR /app
COPY . .
RUN mvn clean package

FROM openjdk:8
COPY --from=build /app/target/cms-0.0.1-SNAPSHOT.jar app.jar  
ENTRYPOINT ["java","-jar","app.jar"]

Running JAR from Windows

RUN dos2unix ./mvnw

Build and run in Docker

  • Build all the dependencies in preparation to go offline. This is a separate step so the dependencies will be cached unless the pom.xml file has changed.
RUN ./mvnw dependency:go-offline -B
  • Copy the project source
COPY src src
  • Package the application
RUN ./mvnw package -DskipTests
RUN mkdir -p target/dependency && (cd target/dependency; jar -xf ../*.jar)
  • Stage 2: A minimal Docker image with a command to run the app
$ FROM openjdk:8-jre-alpine
  • Dependency
ARG DEPENDENCY=/app/target/dependency

COPY --from=build ${DEPENDENCY}/BOOT-INF/lib /app/lib
COPY --from=build ${DEPENDENCY}/META-INF /app/META-INF
COPY --from=build ${DEPENDENCY}/BOOT-INF/classes /app

ENTRYPOINT ["java","-cp","app:app/lib/*","edu.baylor.ecs.cms.CmsApplication"]