SpringBoot中使用Maven插件，上传docker镜像

开启docker远程端口

我上一篇里面写了，这里暴露的路径：

18.16.202.95:2375

简单构建

配置`pom.xml`文件

在properties中增加一行指定远程主机的位置

 <properties>

    <java.version>1.8</java.version>

    <dockerHost>http://18.16.202.95:2375</dockerHost>

  </properties>

增加一个plugin

   <plugin>

        <groupId>com.spotify</groupId>

        <artifactId>docker-maven-plugin</artifactId>

        <version>0.4.12</version>

        <configuration>

          <imageName>com.huishi.demo</imageName>

          <!--          <imageName>${project.build.finalName}</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>

或者就用一个整个，dockerHost配置设置在插件里面：

  <plugin>

        <groupId>com.spotify</groupId>

        <artifactId>docker-maven-plugin</artifactId>

        <version>0.4.12</version>

        <configuration>

          <imageName>com.huishi.demo</imageName>

          <!--          <imageName>${project.build.finalName}</imageName>-->

          <baseImage>java</baseImage>

          <entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>

          <dockerHost>http://18.16.202.95:2375</dockerHost>

          <resources>

            <resource>

              <targetPath>/</targetPath>

              <directory>${project.build.directory}</directory>

              <include>${project.build.finalName}.jar</include>

            </resource>

          </resources>

        </configuration>

      </plugin>

这种方式也是可以的。

configuration配置说明：

imageName:用于指定镜像的完整名称,其中{docker.registry}为注册中心地址,{project.groupId}为仓库名称,{project.artifactId}为镜像名称,${project.version}为镜像标签名.
dockerDirectory:用于指定Dockerfile文件所在的目录.
resources.resource.directory:用于指定需要复制的根目录,${project.build.directory}表示target目录.
resources.resource.include:用于指定需要复制的文件,${project.build.finalName}.jar表示生成的jar包.

configuration中也可以添加

 <forceTags>true</forceTags>

用于每次新的构建上覆盖镜像tags，如果如果已经存在该tag，那么旧的镜像将会设为none

构建镜像：

mvn -DskipTests clean package docker:build

mvn clean package docker:build -Dmaven.test.skip=true

查看：

[root@slaver2 /]# docker images

REPOSITORY                                 TAG                 IMAGE ID            CREATED              SIZE

com.huishi.demo                            latest              860fe1ab3334        About a minute ago   662MB

启动镜像：

[root@slaver2 /]# docker run -p 18080:8080 com.huishi.demo

  .   ____          _            __ _ _

 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \

( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \

 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )

  '  |____| .__|_| |_|_| |_\__, | / / / /

 =========|_|==============|___/=/_/_/_/

 :: Spring Boot ::        (v2.1.8.RELEASE)

2019-09-12 12:08:58.997  INFO 1 --- [           main] com.huishi.demo.DemoApplication          : Starting DemoApplication v0.0.1-SNAPSHOT on 70b1ca956ab4 with PID 1 (/demo-0.0.1-SNAPSHOT.jar started by root in /)

2019-09-12 12:08:59.001  INFO 1 --- [           main] com.huishi.demo.DemoApplication          : No active profile set, falling back to default profiles: default

2019-09-12 12:09:02.355  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)

2019-09-12 12:09:02.439  INFO 1 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]

2019-09-12 12:09:02.439  INFO 1 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.24]

2019-09-12 12:09:02.681  INFO 1 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext

2019-09-12 12:09:02.682  INFO 1 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 3526 ms

2019-09-12 12:09:03.527  INFO 1 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'

2019-09-12 12:09:04.218  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''

2019-09-12 12:09:04.236  INFO 1 --- [           main] com.huishi.demo.DemoApplication          : Started DemoApplication in 6.877 seconds (JVM running for 8.01)

2019-09-12 12:09:27.255  INFO 1 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'

2019-09-12 12:09:27.256  INFO 1 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'

2019-09-12 12:09:27.292  INFO 1 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 36 ms

访问测试：

curl -XGET http://18.16.202.95:18080

Hello Docker World

使用Dockerfile进行构建

在/src/main/docker目录下，建立文件Dockerfile

FROM java:8

VOLUME /tmp

ADD demo-0.0.1.jar app.jar

RUN bash -c 'touch /app.jar'

EXPOSE 8080

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

使用-Djava.security.egd=file:/dev/./urandom加快随机数产生过程。

修改pom.xml配置：

  <plugin>

        <groupId>com.spotify</groupId>

        <artifactId>docker-maven-plugin</artifactId>

        <version>0.4.12</version>

        <configuration>

          <imageName>hongdada/${project.groupId}.${project.artifactId}</imageName>

          <dockerHost>http://18.16.202.95:2375</dockerHost>

          <!-- 指定Dockerfile所在的路径 -->

          <dockerDirectory>${project.basedir}/src/main/docker</dockerDirectory>

          <forceTags>true</forceTags>

          <imageTags>

            <imageTag>${project.version}</imageTag>

            <imageTag>latest</imageTag>

          </imageTags>

          <resources>

            <resource>

              <targetPath>/</targetPath>

              <directory>${project.build.directory}</directory>

              <include>${project.build.finalName}.jar</include>

            </resource>

          </resources>

        </configuration>

      </plugin>

其他步骤一样。这样即可使用Dockerfile进行构建Docker镜像啦。

异常

这里要注意的是，imageName必须符合正则[a-z0-9-_.]，docker的imageName只能是小写字母，数字，点号，下划线

${project.build.finalName} 产出物名称，缺省为${project.artifactId}-${project.version} 当前版本

如果要使用SpringBoot中imageName要设置为${project.build.finalName},注意修改version,一般默认为0.0.1-SNAPSHOT,注意大写字母

参考：

使用Maven插件构建Docker镜像

Docker系列教程12-使用Maven插件构建Docker镜像

使用Docker部署SpringBoot

maven docker 插件集成的几个小坑

docker与Spring boot的集成：docker-maven-plugin使用