1、新建父子maven项目：

父项目：spring-boot2-study

核心pom文件内容如下：

<packaging>pom</packaging>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.6.RELEASE</version>
</parent>
<properties>
    <spring-boot.version>2.0.6.RELEASE</spring-boot.version>
    <dockerfile-maven-version>1.4.7</dockerfile-maven-version>
</properties>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>${spring-boot.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <version>${spring-boot.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot</artifactId>
            <version>${spring-boot.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <version>${spring-boot.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency> <!-- 引入log4j2依赖 -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
            <version>${spring-boot.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <version>${spring-boot.version}</version>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
            <version>${spring-boot.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <version>${spring-boot.version}</version>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
            <version>${spring-boot.version}</version>
        </dependency>
    </dependencies>
</dependencyManagement>


<build>
    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <encoding>UTF-8</encoding>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <configuration>
                    <archiveClasses>false</archiveClasses>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>dockerfile-maven-plugin</artifactId>
                <version>${dockerfile-maven-version}</version>
            </plugin>
        </plugins>
    </pluginManagement>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <encoding>UTF-8</encoding>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
        <plugin>
            <groupId>pl.project13.maven</groupId>
            <artifactId>git-commit-id-plugin</artifactId>
            <executions>
                <execution>
                    <goals>
                        <goal>revision</goal>
                    </goals>
                    <phase>compile</phase>
                </execution>
            </executions>
            <configuration>
                <failOnNoGitDirectory>false</failOnNoGitDirectory>
                <verbose>false</verbose>
                <dateFormat>yyyy-MM-dd'T'HH:mm:ssZ</dateFormat>
                <generateGitPropertiesFile>true</generateGitPropertiesFile>
                <generateGitPropertiesFilename>${project.build.outputDirectory}/git.properties
                </generateGitPropertiesFilename>
                <dotGitDirectory>${project.basedir}/.git</dotGitDirectory>
            </configuration>
        </plugin>
    </plugins>
</build>

子项目：spring-boot-01-docker

核心pom文件内容如下：

<packaging>jar</packaging>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <docker.image.prefix>xubhxxxx</docker.image.prefix>
    <dockerfile-maven-version>1.4.7</dockerfile-maven-version>
    <!-- 指定启动类（main方法的位置） -->
    <start-class>com.xubh.Application</start-class>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>${spring-boot.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <version>${spring-boot.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot</artifactId>
        <version>${spring-boot.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
        <version>${spring-boot.version}</version>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency> <!-- 引入log4j2依赖 -->
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-log4j2</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-configuration-processor</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-aop</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <fork>true</fork>
                <mainClass>${start-class}</mainClass>
                <layout>ZIP</layout>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>pl.project13.maven</groupId>
            <artifactId>git-commit-id-plugin</artifactId>
            <configuration>
                <failOnNoGitDirectory>false</failOnNoGitDirectory>
            </configuration>
        </plugin>
        <plugin>
            <groupId>com.spotify</groupId>
            <artifactId>dockerfile-maven-plugin</artifactId>
            <version>${dockerfile-maven-version}</version>
            <executions>
                <execution>
                    <id>default</id>
                    <goals>
                        <goal>build</goal>
                        <goal>push</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <verbose>true</verbose>
                <repository>${docker.image.prefix}/${project.groupId}.${project.artifactId}</repository>
                <tag>${project.version}</tag>
                <useMavenSettingsForAuth>true</useMavenSettingsForAuth>
                <username>xxxxxx</username>
                <password>xxxxxx</password>
                <buildArgs>
                    <JAR_FILE>${project.build.finalName}.jar</JAR_FILE>
                </buildArgs>
            </configuration>
        </plugin>
    </plugins>
</build>

2、编写Dockerfile文件

在子项目根目录下新建

.dockerignore文件

#!/usr/bin/env bash
.idea/
*.iml
/src
.pom.xml
/.git
/.settings
.classpath
.project
.springBeans
target/classes
target/generated-sources
target/generated-test-sources
target/maven-archiver
target/maven-status
target/test-classes

并新建Dockerfile文件

#FROM openjdk:8-jdk-alpine
#FROM java:8
FROM registry.docker-cn.com/library/openjdk:8-jdk-alpine

#作者
MAINTAINER xxx@xxx.com

# 在宿主机的/var/lib/docker目录下创建一个临时文件并把它链接到容器中的/tmp目录。
#VOLUME ["/home/project", "/tmp/data"]
VOLUME /tmp

# 环境变量
ENV WORK_PATH /opt
ENV JAVA_OPTS="-Xms1G -Xmx1G -XX:-HeapDumpOnOutOfMemoryError -XX:+UseConcMarkSweepGC"
ENV ENV="dev"

RUN echo "Asia/Shanghai" > /etc/timezone
RUN mkdir $WORK_PATH

#USER user:group

LABEL maintainer="Indra Basak"
#STOPSIGNAL
#ONBUILD

WORKDIR $WORK_PATH

ARG JAR_FILE
# 将打包好的spring程序拷贝到容器中的指定位置
ADD target/${JAR_FILE} ${WORK_PATH}/app.jar
#COPY target/${JAR_FILE} {WORK_PATH}/app.jar

RUN sh -c 'touch $WORK_PATH/app.jar'

#容器对外暴露8888
EXPOSE 8888

# 容器启动后执行的命令
#启动方式1
#ENTRYPOINT exec java -server $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /opt/app.jar --spring.profiles.active=$ENV --server.port=8070

#启动方式2
#CMD ["-Xms1G -Xmx1G -XX:-HeapDumpOnOutOfMemoryError -XX:+UseConcMarkSweepGC","--spring.profiles.active=dev","--server.port=8070"]
#ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/opt/app.jar"]

#启动方式3
ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /opt/app.jar --spring.profiles.active=$ENV --server.port=8070"]

3、打包运行

通过maven插件 dockerfile-maven-plugin 生成docker镜像并运行。