Dockerfile+Maven插件构建SpringBoot镜像（推荐）

简介

本示例使用Dockerfile + docker-maven-plugin插件的方式 ，为SpringBoot应用构建镜像（推荐）。

推荐的理由： 打包时自动构建镜像且可以通过 Dockerfile 灵活配置，可以在构建时执行一些其他的脚本

docker开启远程API

参考：基于Maven插件为SpringBoot应用构建镜像（一）

编写Dockerfile文件

# 该镜像需要依赖的基础镜像
FROM java:8
# 将当前目录下的jar包复制到docker容器的/目录下
ADD dockerfile-maven-example-0.0.1-SNAPSHOT.jar /app.jar
# 运行过程中更改 `app.jar` 文件的访问时间和修改时间
RUN bash -c 'touch /app.jar'
# 声明服务运行在8803端口
EXPOSE 8803
# 指定docker容器启动时运行jar包
ENTRYPOINT ["java", "-jar","/app.jar"]
# 指定维护者的名字
MAINTAINER tuonioooo

使用maven打包应用

pom.xml 文件中添加 docker-maven-plugin 依赖

<build>
  <plugins>
    <plugin>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-maven-plugin</artifactId>
      <configuration>
        <excludes>
          <exclude>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
          </exclude>
        </excludes>
      </configuration>
    </plugin>
    <!--配置docker打包插件-->
    <plugin>
      <groupId>com.spotify</groupId>
      <artifactId>docker-maven-plugin</artifactId>
      <version>1.1.0</version>
      <!--
      WARNING: The following warnings have been detected: WARNING: HK2 service reification failed for [org.glassfish.jersey.message.internal.DataSourceProvider] with an exception:
      @see https://github.com/spotify/dockerfile-maven/issues/90
      添加如下依赖解决问题
      -->
      <dependencies>
        <dependency>
          <groupId>javax.activation</groupId>
          <artifactId>activation</artifactId>
          <version>1.1.1</version>
        </dependency>
      </dependencies>
      <!--如果想在项目打包时构建镜像添加 `mvn clean -DskipTests package` 会同时构建镜像 相当于 mvn clean -DskipTests package docker:build -->
      <executions>
        <execution>
          <id>build-image</id>
          <phase>package</phase>
          <goals>
            <goal>build</goal>
          </goals>
        </execution>
      </executions>
      <configuration>
        <!-- 配置docker服务器地址 -->
        <dockerHost>http://192.168.217.144:2375</dockerHost>
        <imageName>my_df_maven/${project.name}:${project.version}</imageName> <!--镜像名称-->
        <!-- 配置Dockerfile目录 说明：配置dockerDirectory后会忽略掉pom里的baseImage, maintainer, cmd and entryPoint配置, 只保留resources配置 -->
        <dockerDirectory>${project.basedir}/docker</dockerDirectory>
        <forceTags>true</forceTags><!--覆盖已存在的标签 镜像-->
        <resources>
          <resource>
            <targetPath>/</targetPath><!-- 将打包后的资源文件复制到该目录，如果定义了dockerDirectory，将会复制到 dockerDirectory目录下 -->
            <directory>${project.build.directory}</directory>
            <include>${project.build.finalName}.jar</include>
            <include>classes/1.txt</include>
          </resource>
        </resources>
      </configuration>
    </plugin>
  </plugins>
</build>

使用idea maven插件打包

输出信息

[INFO] Building image my_df_maven/dockerfile-maven-example:0.0.1-SNAPSHOT
Step 1/6 : FROM java:8

 ---> d23bdf5b1b1b
Step 2/6 : ADD dockerfile-maven-example-0.0.1-SNAPSHOT.jar /app.jar

 ---> a88647ddac35
Step 3/6 : RUN bash -c 'touch /app.jar'

 ---> Running in e0bddec529fb
Removing intermediate container e0bddec529fb
 ---> c8c194b4f590
Step 4/6 : EXPOSE 8803

 ---> Running in ac936d667921
Removing intermediate container ac936d667921
 ---> ebab14222c4b
Step 5/6 : ENTRYPOINT ["java", "-jar","/app.jar"]

 ---> Running in 0f33bb18b5c8
Removing intermediate container 0f33bb18b5c8
 ---> c3bc601f3589
Step 6/6 : MAINTAINER tuonioooo

 ---> Running in 8f8705ac91ca
Removing intermediate container 8f8705ac91ca
 ---> 75b139958077
ProgressMessage{id=null, status=null, stream=null, error=null, progress=null, progressDetail=null}
Successfully built 75b139958077
Successfully tagged my_df_maven/dockerfile-maven-example:0.0.1-SNAPSHOT
[INFO] Built my_df_maven/dockerfile-maven-example:0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  29.940 s
[INFO] Finished at: 2022-11-02T12:14:55+08:00
[INFO] ------------------------------------------------------------------------

Process finished with exit code 0

docker服务器地址（我的是192.168.217.144）, 查看结果

docker images
REPOSITORY                             TAG              IMAGE ID       CREATED         SIZE
my_df_maven/dockerfile-maven-example   0.0.1-SNAPSHOT   75b139958077   8 minutes ago   699MB
my_dfile/dockerfile-example            0.0.1-SNAPSHOT   ce44f6e0bb51   3 hours ago     699MB
my_spotify/docker-plugin-example       0.0.1-SNAPSHOT   1d0c230e41ed   14 hours ago    671MB
my/docker-plugin-example               0.0.1-SNAPSHOT   22962486feee   18 hours ago    671MB
nginx                                  latest           605c77e624dd   10 months ago   141MB
redis                                  latest           7614ae9453d1   10 months ago   113MB
mysql                                  5.7              c20987f18b13   10 months ago   448MB
jenkins/jenkins                        lts              2a4bbe50c40b   11 months ago   441MB
java                                   8                d23bdf5b1b1b   5 years ago     643MB

启动

删除旧容器和镜像

docker stop dockerfile-maven-01
echo '----stop container----'
docker rm dockerfile-maven-01
echo '----rm container----'
docker rmi `docker images | grep none | awk '{print $3}'`
或
docker rmi $(docker images -f "dangling=true" -q)
或  
docker image prune
echo '----rm none images----'

启动docker

mkdir -p /mount/apps/dockerfile-maven-example/logs

docker run -p 8803:8803 --name dockerfile-maven-01 \
  -v /etc/localtime:/etc/localtime \
  -v /mount/apps/dockerfile-maven-example/logs:/logs \
  -d my_df_maven/dockerfile-maven-example:0.0.1-SNAPSHOT

进行访问测试，地址：http://192.168.217.144:8803/swagger-ui.html

演示项目地址

https://gitee.com/ecs-common-deploy/dockerfile-maven-example.git