pom.xml檔案新增docker外掛

<build>
    <plugins>
<!-- docker的maven外掛，官網：https://github.com/spotify/docker-maven-plugin -->
<plugin>
            <groupId>com.spotify</groupId>
            <artifactId>docker-maven-plugin</artifactId>
            <version>0.4.12</version>
 
            <configuration>
                <imageName>useronline-jar</imageName>
<!-- 指定Dockerfile所在的路徑 -->
<dockerDirectory>${project.basedir}/src/main/docker</dockerDirectory>
<!-- 注意imageName一定要是符合正則[a-z0-9-_.]的，否則構建不會成功 -->
                <!-- 詳見：https://github.com/spotify/docker-maven-plugin    Invalid repository name ... only [a-z0-9-_.] are allowed-->
 
                <!--<imageName>useronline-dockerfile</imageName>-->
                <!--<baseImage>java</baseImage>-->
                <!--<entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>-->
<resources>
                    <resource>
 
                        <targetPath>/</targetPath>
                        <directory>${project.build.directory}</directory>
                        <include>${project.build.finalName}.jar</include>
                    </resource>
                </resources>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <version>2.4.3</version>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>shade</goal>
                    </goals>
                    <configuration>
                        <transformers>
                            <transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass>jinju.useranalyse.kafka.KafkaTest</mainClass>
<!--<manifestEntries>-->
                                    <!--<Main-Class>jinju.useranalyse.kafka.KafkaTest</Main-Class>-->
                                    <!--<Build-Number>1.0.2</Build-Number>-->
                                <!--</manifestEntries>-->
</transformer>
                            <transformer
implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.handlers</resource>
                            </transformer>
                            <transformer
implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.schemas</resource>
                            </transformer>
                        </transformers>
                        <shadedArtifactAttached>true</shadedArtifactAttached>
                        <shadedClassifierName>executable</shadedClassifierName>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
    <resources>
        <resource>
            <directory>src/main/resources</directory>
        </resource>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>
</build>

docker-maven-plugin是docker打包外掛

maven-shade-plugin是可執行jar打包外掛

專案目錄結構如下:

如果直接用docker外掛打包會出現找不到主類

將package打包後的檔案複製到docker目錄後然後在Dockerfile中指定對應的檔案即可。

FROM java

ADD   useronline-1.0-SNAPSHOT.jar app.jar

ADD  resources/   resources/

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