第三十八章 springboot+docker（maven）
回顾上一章的整个部署过程：
[*]使用"mvn install"进行打包jar
[*]将jar移动到与Dockerfile文件相同的文件夹下
[*]编写Dockerfile文件
[*]使用"docker build -t="zjg/myservice1docker:v1.1" /Users/enniu1/Desktop/docker-data/file"命令进行打包
[*]需要手动指定生成的images的name和tag，以及dockerfile所在的文件夹
[*]之后启动镜像
本章使用docker-maven-plugin实现。
一、Dockerfile:与上一章完全相同
[*]放在了一个单独的文件夹下src/main/docker/
二、pom.xml
引入docker-maven-plugin插件
<plugin>
<groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId>
<version>0.4.13</version>
<configuration>
<!-- ${project.artifactId}：即artifactId，myservice1-docker ${project.version}:即version，1.0-SNAPSHOT -->
<imageName>${project.artifactId}:${project.version}</imageName><!-- 镜像名称 -->
<dockerDirectory>${basedir}/src/main/docker</dockerDirectory><!-- Dockerfile文件地址 -->
<resources>
<resource>
<!-- <targetPath>/</targetPath> -->
<!-- ${project.build.directory},项目构建输出目录，默认为target/ -->
<directory>${project.build.directory}</directory>
<!-- ${project.build.directory},打包出来的jar名称，默认为${project.artifactId}-${project.version} -->
<include>${project.build.finalName}.jar</include>
</resource>
</resources>
</configuration>
</plugin>
执行下边的命令后，
[*]将dockerDirectory目录下的内容（这里只有Dockerfile）拷贝到项目的/target/docker/文件夹下（这里就是/target/docker/Dockerfile）
[*]将resource中的include下的文件（这里就是${project.build.finalName}.jar）拷贝到/target/docker/文件夹下（这里就是/target/docker/myservice1-docker-1.0-SNAPSHOT.jar）
[*]经过上述两个拷贝，将jar与Dockerfile拷贝到同一个文件夹下了
[*]之后进行构建过程
三、运行
mvn clean package docker:build
关键日志：
--- maven-jar-plugin:2.5:jar (default-jar) @ myservice1-docker ---
Building jar: /Users/enniu1/Desktop/project/myservice1-docker/target/myservice1-docker-1.0-SNAPSHOT.jar
--- spring-boot-maven-plugin:1.3.0.RELEASE:repackage (default) @ myservice1-docker ---
--- docker-maven-plugin:0.4.13:build (default-cli) @ myservice1-docker ---
Copying /Users/enniu1/Desktop/project/myservice1-docker/target/myservice1-docker-1.0-SNAPSHOT.jar -> /Users/enniu1/Desktop/project/myservice1-docker/target/docker/myservice1-docker-1.0-SNAPSHOT.jar
Copying /Users/enniu1/Desktop/project/myservice1-docker/src/main/docker/Dockerfile -> /Users/enniu1/Desktop/project/myservice1-docker/target/docker/Dockerfile
Building image myservice1-docker:1.0-SNAPSHOT
Step 1 : FROM zhaojigang/jdk8:c7_j8
---> e7b4cf41e531
Step 2 : ADD myservice1-docker-1.0-SNAPSHOT.jar /opt/jar/
---> 771c895968f6
Removing intermediate container 12392489f5a4
Step 3 : ENV JAVA_HOME /opt/jdk
---> Running in a81ffe207dfa
---> 7aded06bc5be
Removing intermediate container a81ffe207dfa
Step 4 : ENV PATH $PATH:$JAVA_HOME/bin
---> Running in b2598b5eee7c
---> 5c282af98ab3
Removing intermediate container b2598b5eee7c
Step 5 : CMD java -jar /opt/jar/myservice1-docker-1.0-SNAPSHOT.jar
---> Running in 51881dd70cd2
---> 5e86ecc155d8
Removing intermediate container 51881dd70cd2
Successfully built 5e86ecc155d8
说明：
[*]maven-jar-plugin进行package
[*]spring-boot-maven-plugin进行repackage
[*]将jar和Dockerfile拷贝到同一个目录（target/docker/）
[*]执行Dockerfile进行build
四、查看镜像
[*]docker images
1 REPOSITORY TAG IMAGE ID CREATED SIZE
2 myservice1-docker 1.0-SNAPSHOT 5e86ecc155d8 21 seconds ago 575.8 MB
五、启动镜像
[*]docker run -d -p 8014:8080 5e86ecc155d8
浏览器访问：localhost:8014/health
注意：
[*]多次指定build去构建的话，之前构建出来的REPOSITORY和TAG都会变为<none>
1 REPOSITORY TAG IMAGE ID CREATED SIZE
2 myservice1-docker 1.0-SNAPSHOT 5e86ecc155d8 21 seconds ago 575.8 MB
3 <none> <none> f0f5b0df8ecf 4 minutes ago 575.8 MB
[*]使用docker-maven-plugin构建项目，可以避免手工移动jar，并且可以很方便的自己做成archetype
[*]参考：https://github.com/spotify/docker-maven-plugin
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