准备工作
环境:
- linux环境或mac,不要用windows
- jdk 8
- maven 3.0
- docker
对docker一无所知的看docker教程。
创建一个springboot工程
引入web的起步依赖,创建一个 Controler:
@SpringBootApplication
@RestController
public class SpringbootWithDockerApplication {
@RequestMapping("/")
public String home() {
return "Hello Docker World";
}
public static void main(String[] args) {
SpringApplication.run(SpringbootWithDockerApplication.class, args);
}
}
将springboot工程容器化
Docker有一个简单的dockerfile文件作为指定镜像的图层。让我们先创建一个 dockerFile文件:
src/main/docker/Dockerfile:
FROM frolvlad/alpine-oraclejdk8:slim
VOLUME /tmp
ADD springboot-with-docker-0.0.1-SNAPSHOT.jar app.jar
RUN sh -c 'touch /app.jar'
ENV JAVA_OPTS=""
ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar" ]
我们通过maven 构建docker镜像。
在maven的pom目录,加上docker镜像构建的插件
<properties>
<docker.image.prefix>springio</docker.image.prefix>
</properties>
<build>
<plugins>
<plugin>
<groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId>
<version>0.4.11</version>
<configuration>
<imageName>${docker.image.prefix}/${project.artifactId}</imageName>
<dockerDirectory>src/main/docker</dockerDirectory>
<resources>
<resource>
<targetPath>/</targetPath>
<directory>${project.build.directory}</directory>
<include>${project.build.finalName}.jar</include>
</resource>
</resources>
</configuration>
</plugin>
</plugins>
</build>
注意:${docker.image.prefix} 为你在 docker官方仓库的用户名,如果你不需要上传镜像,随便填。
通过maven 命令:
第一步:mvn clean
第二步: mvn package docker:bulid ,如下:
Step 2/6 : VOLUME /tmp
—> Running in a98be3878053
—> 8286e98b54c5
Removing intermediate container a98be3878053
Step 3/6 : ADD springboot-with-docker-0.0.1-SNAPSHOT.jar app.jar
—> c6ce13e50bbd
Removing intermediate container a303a3058869
Step 4/6 : RUN sh -c ‘touch /app.jar’
—> Running in cf231afe700e
—> 9a0ec8936c00
Removing intermediate container cf231afe700e
Step 5/6 : ENV JAVA_OPTS “”
—> Running in e192597fc881
—> 2cb0d73bbdb0
Removing intermediate container e192597fc881
Step 6/6 : ENTRYPOINT sh -c java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar
—> Running in ab85f53fcdd8
—> 60fdb5c61692
Removing intermediate container ab85f53fcdd8
Successfully built 60fdb5c61692
[INFO] Built forezp/springboot-with-docker
[INFO] ————————————————————————
[INFO] BUILD SUCCESS
[INFO] ————————————————————————
[INFO] Total time: 01:45 min
[INFO] Finished at: 2017-04-19T05:37:44-07:00
[INFO] Final Memory: 19M/48M
[INFO] ————————————————————————
镜像构建成功。查看镜像:
docker images
显示:
forezp/springboot-with-docker latest 60fdb5c61692 About a minute ago 195 MB
启动镜像:
$ docker run -p 8080:8080 -t forezp/springboot-with-docker
打开浏览器访问 localhost:8080;浏览器显示:Hello Docker World。
说明docker 的springboot工程已部署。
停止镜像:
docker stop 60fdb5c61692
删除镜像:
docker rm 60fdb5c61692