#docker (2020-02)

FROM openjdk:8-jre

RUN \
    apt update && \
    apt upgrade -y && \
    apt install -y libtcnative-1

WORKDIR /

RUN mkdir -p /usr/share/java-app/lib/

ARG JAR

ARG GIT_COMMIT
ARG PROJECT_VERSION
ARG BUILD_NUMBER

LABEL GIT_COMMIT=${GIT_COMMIT}
LABEL PROJECT_VERSION=${PROJECT_VERSION}
LABEL BUILD_NUMBER=${BUILD_NUMBER}
LABEL VERSION=${PROJECT_VERSION}.${BUILD_NUMBER}

COPY target/${JAR} /usr/share/java-app/lib/java-app.jar
COPY src/main/newrelic /usr/share/java-app/lib/newrelic

EXPOSE 8080

USER nobody:nogroup

ENTRYPOINT exec java \
	-javaagent:/usr/share/java-app/lib/newrelic/newrelic.jar \
	-jar /usr/share/java-app/lib/java-app.jar

HEALTHCHECK CMD curl --fail --silent <http://localhost:8080/actuator/health/> || exit 1

<?xml version="1.0" encoding="UTF-8"?>
<project...>
	<properties>
		my.docker.registry.com/${project.artifactId}:${project.version}.${env.BUILD_NUMBER}-${env.GIT_COMMIT}</docker.imageName>
	</properties>
...
	<profiles>
		<profile>
			<id>docker-profile</id>
			<activation>
				<property>
					<name>env.GIT_COMMIT</name>
				</property>
			</activation>
			<build>
				<plugins>
					<plugin>
						<groupId>com.spotify</groupId>
						<artifactId>dockerfile-maven-plugin</artifactId>
						<executions>
							<execution>
								<id>default</id>
								<goals>
									<goal>build</goal>
									<goal>tag</goal>
								</goals>
							</execution>
							<execution>
								<id>tag</id>
								<goals>
									<goal>tag</goal>
								</goals>
								<configuration>
									<tag>latest</tag>
								</configuration>
							</execution>
						</executions>
						<configuration>
							my.docker.registry.com/java-app</repository>
							<tag>${project.version}.${env.BUILD_NUMBER}-${env.GIT_COMMIT}</tag>
							<buildArgs>
								<JAR>${project.build.finalName}.jar</JAR>
								<GIT_COMMIT>${env.GIT_COMMIT}</GIT_COMMIT>
								<PROJECT_VERSION>${project.version}</PROJECT_VERSION>
								<BUILD_NUMBER>${env.BUILD_NUMBER}</BUILD_NUMBER>
							</buildArgs>
						</configuration>
					</plugin>
				</plugins>
			</build>
		</profile>
	</profiles>
...
</project>

FROM gcr.io/distroless/java:11

ARG SENTRY_RELEASE="local"

ENV SENTRY_RELEASE=$SENTRY_RELEASE

EXPOSE 5000
# Override the maximum and initial heap sizes at runtime by setting the
# JAVA_MAXHEAP and JAVA_STDHEAP environment variables.
#
# Other arbitrary Java command arguments can be specified free form
# by setting the JAVA_XVAR environment variable.
ENV JAVA_TOOL_OPTIONS="-javaagent:newrelic/newrelic.jar -XX:+UseConcMarkSweepGC -Dfile.encoding=UTF-8"

HEALTHCHECK CMD curl --fail <http://localhost:5000/api/actuator/health> || exit 1

VOLUME /tmp

# If there are ever more than one jar produced and available in build/libs
# then this directive will create a directory named `app.jar` in the
# current working directory and copy all of the jar files into that
# directory. If that becomes the case then change `*.jar` to the
# name of the target jar file.
COPY build/libs/*.jar app.jar
COPY libs/newrelic ./newrelic

CMD ["/app.jar"]