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使用docker-maven-plugin插件实现Docker构建并提交到私有仓库

By Vinny Wang
使用Maven插件实现项目打包及Docker构建并提交到私有仓库
以下内容非教程，不适合对Docker及Maven不熟悉者使用

目标：Spring Boot项目打包成可执行的jar文件后，使用docker-maven-plugin（spotify）插件自动构建Docker后上传到阿里云Docker镜像仓库（其他仓库同理）

引用参考：

  1. docker-maven-plugin插件：https://github.com/spotify/docker-maven-plugin
  2. Maven提交服务密码加密：https://maven.apache.org/guides/mini/guide-encryption.html
  3. Maven的settings.xml：http://maven.apache.org/ref/3.3.9/maven-settings/settings.html

准备工作：

  • 本机安装 Docker 1.9
  • Eclipse环境（本机使用STS）
  • Maven环境
  • 阿里云Docker仓库（其他Docker仓库都可以）
  • 如果需要Maven项目部署，需要Maven私服（）
  • SecureCRT （其他终端皆可，仅用于启动Docker测试）

1、 构建Spring Boot项目

项目目录

2、 pom.xml文件中 加入docker-maven-plugin插件

完整pom文件：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>dockerdemo</artifactId>
    <version>0.0.1</version>
    <packaging>jar</packaging>

    <name>dockerdemo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <docker.repostory>registry.cn-hangzhou.aliyuncs.com</docker.repostory>
        <docker.registry.name>viiso</docker.registry.name>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <resources><!-- 使用@@站位符，输出Dockerfile至docker文件夹 -->
            <resource>
                <directory>src/main/docker</directory>
                <filtering>true</filtering>
                <includes>
                    <include>**/Dockerfile</include>
                </includes>
                <targetPath>../docker</targetPath>
            </resource>
        </resources>
        <plugins>
            <plugin><!-- 置顶 -->
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <version>0.4.13</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>build</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>tag-image</id>
                        <phase>package</phase>
                        <goals>
                            <goal>tag</goal>
                        </goals>
                        <configuration>
                            <image>${docker.registry.name}/${project.artifactId}:${project.version}</image>
                            <newName>${docker.repostory}/${docker.registry.name}/${project.artifactId}:${project.version}</newName>
                        </configuration>
                    </execution>
                    <execution>
                        <id>push-image</id>
                        <phase>deploy</phase>
                        <goals>
                            <goal>push</goal>
                        </goals>
                        <configuration>
                            <imageName>${docker.repostory}/${docker.registry.name}/${project.artifactId}:${project.version}</imageName>
                        </configuration>
                    </execution>
                </executions>
                <configuration>
                    <!-- 私有仓库配置，需要settings.xml文件配合serverId对应的服务地址 -->
                    <serverId>docker-aliyun</serverId>
                    <registryUrl>registry.cn-hangzhou.aliyuncs.com</registryUrl>
                    <!-- <forceTags>true</forceTags> -->
                    <!--install阶段也上传，否则只有deploy阶段上传-->
                    <pushImage>true</pushImage>
                    <dockerDirectory>target/docker</dockerDirectory>
                     <imageName>
                        ${docker.repostory}/${docker.registry.name}/${project.artifactId}:${project.version}
                    </imageName>
                    <imageTags>
                        <!--docker的tag为项目版本号、latest-->
                        <imageTag>${git.commit.id.abbrev}</imageTag>
                        <imageTag>latest</imageTag>
                    </imageTags>
                    <resources>
                        <rescource><!-- 将打包文件放入dockerDirectory指定的位置 -->
                               <targetPath>/</targetPath>
                               <directory>${project.build.directory}</directory>
                               <include>${project.build.finalName}.jar</include>
                           </rescource>
                           <!-- 输出Dockerfile至docker文件夹,如果不使用占位符,可使用以下配置 -->
                           <!--
                           <resource>
                               <directory>src/main/docker</directory>
                               <filtering>true</filtering>
                               <includes>
                                   <include>**/Dockerfile</include>
                               </includes>
                               <targetPath>../docker</targetPath>
                           </resource>
                           -->
                    </resources>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

说明：

  • Dockerfile构建文件在src/main/docker中
  • 如果Dockerfile文件需要maven构建参数（比如需要构建后的打包文件名等），则使用@@占位符（如@project.build.finalName@）原因是Sping Boot 的pom将resource插件的占位符由${}改为@@，非继承Spring Boot 的pom文件，则使用${}占位符
  • 如果不需要动态生成Dockerfile文件，则可以将Dockerfile资源拷贝部分放入docker-maven-plugin插件的<resources>配置里
  • spring-boot-maven-plugin插件一定要在其他构建插件之上，否则打包文件会有问题。

Dockerfile文件

# Version 0.0.1
FROM java:8

MAINTAINER Ryuu KK "ryuu_kk@163.com"

# 环境变量
ENV WORK_PATH /home/project/dockerdemo
ENV APP_NAME @project.build.finalName@.@project.packaging@
ENV APP_VERSION @project.version@

EXPOSE 8080

#USER
#USER user:group

#VOLUME
VOLUME ["/home/project", "/tmp/data"]

#ADD

#COPY
COPY $APP_NAME $WORK_PATH/

#LABEL
#STOPSIGNAL
#ARG
#ONBUILD

# WORKDIR
WORKDIR $WORK_PATH

# ENTRYPOINT
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom"]

# CMD
CMD ["-jar", "@project.build.finalName@.@project.packaging@"]

3、settings.xml配置私有库的访问
首先使用你的私有仓库访问密码生成主密码：

mvn --encrypt-master-password <password>

其次在settings.xml文件的同级目录创建settings-security.xml文件，将主密码写入：

<?xml version="1.0" encoding="UTF-8"?>
<settingsSecurity>
  <master>{Ns0JM49fW9gHMTZ44n*****************=}</master>
</settingsSecurity>

最后使用你的私有仓库访问密码生成服务密码，将生成的密码写入到settings.xml的<services>中：

mvn --encrypt-password <password>
 <server>
      <id>docker-aliyun</id>
      <username>***pro@gmail.com</username>
      <password>{D9YIyWYvtYsHayLjIenj***********=}</password>
      <configuration>
        <email>***pro@gmail.com</email>
      </configuration>
    </server>

.m2文件夹

更多settings.xml配置参考：http://maven.apache.org/ref/3.3.9/maven-settings/settings.html

4、执行maven install
如果<pushImage>false</pushImage>则install阶段将不提交Docker镜像，只有maven的deploy阶段才提交。
mvn clean install -Dmaven.test.skip=true -s ~/.m2/settings.xml

[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building dockerdemo 0.0.1
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.6.1:clean (default-clean) @ dockerdemo ---
[INFO] Deleting /home/tony/git/dockerdemo/target
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ dockerdemo ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource to ../docker
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ dockerdemo ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to /home/tony/git/dockerdemo/target/classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ dockerdemo ---
[INFO] Not copying test resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ dockerdemo ---
[INFO] Not compiling test sources
[INFO]
[INFO] --- maven-surefire-plugin:2.18.1:test (default-test) @ dockerdemo ---
[INFO] Tests are skipped.
[INFO]
[INFO] --- maven-jar-plugin:2.6:jar (default-jar) @ dockerdemo ---
[INFO] Building jar: /home/tony/git/dockerdemo/target/dockerdemo-0.0.1.jar
[INFO]
[INFO] --- spring-boot-maven-plugin:1.4.3.RELEASE:repackage (default) @ dockerdemo ---
[INFO]
[INFO] --- docker-maven-plugin:0.4.13:build (default) @ dockerdemo ---
[INFO] Copying /home/tony/git/dockerdemo/target/dockerdemo-0.0.1.jar -> /home/tony/git/dockerdemo/target/docker/dockerdemo-0.0.1.jar
[INFO] Copying target/docker/dockerdemo-0.0.1.jar -> /home/tony/git/dockerdemo/target/docker/dockerdemo-0.0.1.jar
[INFO] Copying target/docker/Dockerfile -> /home/tony/git/dockerdemo/target/docker/Dockerfile
[INFO] Building image registry.cn-hangzhou.aliyuncs.com/viiso/dockerdemo:0.0.1
Step 1 : FROM java:8
 ---> a001fc27db5a
Step 2 : MAINTAINER Ryuu KK "ryuu_kk@163.com"
 ---> Using cache
 ---> 9142f19f66e4
Step 3 : ENV WORK_PATH /home/project/dockerdemo
 ---> Using cache
 ---> f804b2685414
Step 4 : ENV APP_NAME dockerdemo-0.0.1.jar
 ---> Using cache
 ---> 449b34e1b059
Step 5 : ENV APP_VERSION 0.0.1
 ---> Using cache
 ---> 434e7a21767b
Step 6 : EXPOSE 8080
 ---> Using cache
 ---> b4f12840a5fd
Step 7 : VOLUME /home/project /tmp/data
 ---> Using cache
 ---> 6dc6a16375f8
Step 8 : ADD $APP_NAME $WORK_PATH/
 ---> fb9ca6c55101
Removing intermediate container 0e7d77507c01
Step 9 : COPY . $WORK_PATH/
 ---> 1f3848c151a5
Removing intermediate container 3ffe74084b83
Step 10 : WORKDIR $WORK_PATH
 ---> Running in 98819e023aec
 ---> 14d8dda96d7c
Removing intermediate container 98819e023aec
Successfully built 14d8dda96d7c
[INFO] Built registry.cn-hangzhou.aliyuncs.com/viiso/dockerdemo:0.0.1
[INFO] Tagging registry.cn-hangzhou.aliyuncs.com/viiso/dockerdemo:0.0.1 with latest
[INFO] Pushing registry.cn-hangzhou.aliyuncs.com/viiso/dockerdemo:0.0.1
The push refers to a repository [registry.cn-hangzhou.aliyuncs.com/viiso/dockerdemo]
d8c8f704105a: Pushed
cfb84949120c: Pushed
2071795f387c: Layer already exists
046002f6f2ea: Layer already exists
9425eace6ed9: Layer already exists
9c39e87731b7: Layer already exists
f7ed56f3fce3: Layer already exists
53c779688d06: Layer already exists
60a0858edcd5: Layer already exists
b6ca02dfe5e6: Layer already exists
0.0.1: digest: sha256:e743bfd839a6457a4db7fd22edcb3758ffc39e4e7816c8d00bc24ccf0ede13a5 size: 2424
null: null
[INFO]
[INFO] --- docker-maven-plugin:0.4.13:tag (tag-image) @ dockerdemo ---
[INFO] Creating tag registry.cn-hangzhou.aliyuncs.com/viiso/dockerdemo:0.0.1 from registry.cn-hangzhou.aliyuncs.com/viiso/dockerdemo:0.0.1
[INFO] Pushing registry.cn-hangzhou.aliyuncs.com/viiso/dockerdemo:0.0.1
The push refers to a repository [registry.cn-hangzhou.aliyuncs.com/viiso/dockerdemo]
d8c8f704105a: Layer already exists
cfb84949120c: Layer already exists
2071795f387c: Layer already exists
046002f6f2ea: Layer already exists
9425eace6ed9: Layer already exists
9c39e87731b7: Layer already exists
f7ed56f3fce3: Layer already exists
53c779688d06: Layer already exists
60a0858edcd5: Layer already exists
b6ca02dfe5e6: Layer already exists
0.0.1: digest: sha256:e23d5c731170fd2980b688c34b5a844fac66d9547ba48a41417bd1684425958f size: 2424
null: null
[INFO]
[INFO] --- maven-install-plugin:2.5.2:install (default-install) @ dockerdemo ---
[INFO] Installing /home/tony/git/dockerdemo/target/dockerdemo-0.0.1.jar to /home/tony/.m2/repository/com/example/dockerdemo/0.0.1/dockerdemo-0.0.1.jar
[INFO] Installing /home/tony/git/dockerdemo/pom.xml to /home/tony/.m2/repository/com/example/dockerdemo/0.0.1/dockerdemo-0.0.1.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 54.660 s
[INFO] Finished at: 2017-01-08T15:48:33+08:00
[INFO] Final Memory: 43M/303M
[INFO] ------------------------------------------------------------------------

查看阿里云Docker镜像仓库，SHA256摘要与日志的摘要一致

Paste_Image.png

5、运行私有仓库的dockerdemo镜像
使用SecureCRT 登录客户端

sudo docker login --username=***pro@gmail.com registry.cn-hangzhou.aliyuncs.com

登录Docker私有仓库

下载仓库镜像

sudo docker pull registry.cn-hangzhou.aliyuncs.com/viiso/dockerdemo:[镜像版本号]

下载Docker镜像，由于后期才截图，图片的摘要与上文的摘要不同

运行镜像，将Docker容器的8080端口映射本机80端口

docker run -i -t -p 80:8080 registry.cn-hangzhou.aliyuncs.com/viiso/dockerdemo:0.0.1

启动镜像，Spring Boot启动Tomcat，使用8080端口

6、测试
使用服务器ip进行测试

curl http://ip/health
{"status":"UP","diskSpace":{"status":"UP","total":42139451392,"free":38050045952,"threshold":10485760}}

dockerdemo项目代码：https://code.aliyun.com/ryuu.pro/dockerdemo.git

————- 2017/03/21 更新——————
在多Module项目中使用该插件发现的几个问题

  • <dockerDirectory>target/docker</dockerDirectory>相对路径在多模块中出现“basedir target does not exist ”问题，使用<dockerDirectory>${project.build.directory}</dockerDirectory>指定编译路径
  • 修改Dockerfile文件的生成路径默认到target路径，由于Dockerfile里使用COPY无法改变文件路径，如COPY ../xxxx.jar /xxx时将出现”Permission denied”的问题 
    <resource>
      <directory>src/main/docker</directory>
      <filtering>true</filtering>
      <includes>
          <include>**/Dockerfile</include>
      </includes>
      <targetPath>${project.build.directory}</targetPath>
</resource>
  • 原文 使用<imageTag>${git.commit.id.abbrev}</imageTag>缺少插件 
    <plugin>
      <groupId>pl.project13.maven</groupId>
      <artifactId>git-commit-id-plugin</artifactId>
      <configuration>
          <failOnNoGitDirectory>false</failOnNoGitDirectory>
      </configuration>
</plugin>

    如果不需要git属性插件，可以直接使用<imageTag>${project.version}</imageTag>

作者：疯狂的橙
链接：http://www.jianshu.com/p/c435ea4c0cc0
來源：简书
著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

By Vinny Wang

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