xml配置

修改 ${maven}/conf/settings.xml, 加入:

<pluginGroups>
    <pluginGroup>com.spotify</pluginGroup>
  </pluginGroups>

然后在工程的pom.xml 里, 如此如此:

<plugin><!-- https://mvnrepository.com/artifact/com.spotify/dockerfile-maven-plugin -->

                <groupId>com.spotify</groupId>
                <artifactId>dockerfile-maven-plugin</artifactId>
                <version>1.4.13</version>

               <configuration>
                   <imageName>${docker.image.name}:${docker.image.tag}</imageName>
                   <dockerDirectory>${basedir}/target/dockerfile</dockerDirectory>
                   <resources>
                       <resource>
                           <targetPath>/</targetPath>
                           <directory>${project.build.directory}</directory>
                           <include>${project.build.finalName}.jar</include>
                       </resource>
                   </resources>
               </configuration>
           </plugin>

docker 脚本

在 src/main 下新建docker 目录, 并新建 Dockerfile , 内容如下:

FROM openjdk:8-jdk-alpine
VOLUMN /tmp 
ADD  @project.build.finalName@.jar ~/app.jar
EXPOSE 9001
ENTRYPOINT ["java", "-jar", "~/app.jar"]

from: 基于xx模板构建

volumn: 指定宿主机的挂载点. 用于数据持久化&修改(在宿主机修改后可以在docker 容器里生效)

run: 在docker 容器里运行命令

@project.build.finalName@.jar: 环境变量

expose: 暴露docker 端口

ENTRYPOINT: 容器启动之后运行的命令

可能出错/异常

权限问题

如果遇到:

INFO: Retrying request to {}->unix://localhost:80 
..... 
Failed to execute goal com.spotify:docker-maven-plugin:1.2.2:build (default-cli) on project licensing-service: Exception caught: java.util.concurrent.ExecutionException: com.spotify.docker.client.shaded.javax.ws.rs.ProcessingException: java.io.IOException: Permission denied -> [Help 1]

原因是当前用户没有执行docker 权限. 将docker 权限设置为666 即可:

sudo chmod 666 /var/run/docker.sock

Could not acquire image ID

在1.3.X版本会出现，更新到1.4.X后修复

Must specify baseImage if dockerDirectory is null

镜像没有pull 下来, 运行这个:

docker pull openjdk:8-jdk-alpine