maven 项目 配置docker镜像生成（dockerfile-maven-plugin)

插件地址：https://github.com/spotify/dockerfile-maven

依github上备注，只要在项目根上录上编写dockerfile，然后引用插件即可

• 编写Dockerfile

FROM anapsix/alpine-java

ARG JAR_FILE

ADD target/${JAR_FILE} app.jar

EXPOSE 8080

ENTRYPOINT ["java","-jar","/app.jar"]

• 编写pom.xml

<plugin>
                <groupId>com.spotify</groupId>
                <artifactId>dockerfile-maven-plugin</artifactId>
                <version>${dockerfile-maven-version}</version>
                <executions>
                    <execution>
                        <id>default</id>
                        <goals>
                            <goal>build</goal>
                            <goal>push</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <repository>spotify/foobar</repository>
                    <tag>${project.version}</tag>
                    <buildArgs>
                        <JAR_FILE>${project.build.finalName}.jar</JAR_FILE>
                    </buildArgs>
                </configuration>
            </plugin>

• 因为docker环境默认为localhost:2375的，故可设置环境变量DOCKER_HOST=tcp://ip:port