使用Maven来构建Docker镜像并上传到私服仓库 - 好文

使用Maven来构建Docker镜像并上传到私服仓库

maven是一个强大的项目管理与构建工具，使用maven来构建docker镜像，并自动上传到私服仓库，那么就大大简化了工作。

看到网上大部分都是使用的Spotify公司的插件，这里我也选则此插件进行学习。

一 pom.xml中添加docker的插件
<build> <plugins> <plugin> <groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId> <version>0.4.13</version>
<configuration> <forceTags>true</forceTags>    
<imageName>my/eureka:0.0.1</imageName> 
<baseImage>lwieske/java-8</baseImage>     <dockerHost>http://192.168.10.72:2375</dockerHost> 
<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>
</plugins> </build>
二 docker开启远程api端口

修改 /etc/sysconfig/docker文件
vi /etc/sysconfig/docker
在最下面添加一行
DOCKER_OPTS='-H unix:///var/run/docker.sock -H 0.0.0.0:2375'
再修改 /usr/systemd/system/docker.service
vi /usr/systemd/system/docker.service在ExecStart后面添加 $DOCKER_OPTS \

重新加载配置文件
systemctl daemon-reload
重启docker
systemctl restart docker

三开启防火墙端口
firewall-cmd --zone=public --add-port=2375/tcp --permanent
（--permanent永久生效，没有此参数重启后失效）
重新载入配置
irewall-cmd --reload

四执行mvn命令来构建docker镜像

运行命令

查看服务器上镜像列表

运行镜像

查看结果

可以看到我们的项目已经成功启动了，并且在主机可以直接访问，这说明docker自动帮我们开启了防火墙的端口访问。

如果要使用dockerfile构建镜像

FROM lwieske/java-8 VOLUME /tmp ADD discovery-1.0-SNAPSHOT.jar discovery.jar
EXPOSE 8002 CMD
["java","-Djava.security.egd=file:/dev/./urandom","-jar","discovery.jar"]
<plugin> <groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId> <version>0.4.13</version>
<configuration> <forceTags>true</forceTags> 
<imageName>my/eureka:0.0.2</imageName> 
<dockerHost>http://192.168.10.73:2375</dockerHost> 
<dockerDirectory>${project.basedir}/src/main/docker</dockerDirectory>
 <resources> <resource> 
<targetPath>/</targetPath> 
<directory>${project.build.directory}</directory>  <include>${project.build.finalName}.jar</include>  </resource> </resources> </configuration> </plugin>

测试运行dockerfile构建的镜像

五将docker绑定到mvn其它命令执行

比如我们想在项目mvn package的时候同时构建docker上传到服务器。
<build> <plugins> <plugin> <groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId> <version>0.4.13</version>
                <executions> <execution> <id>build-image</id>
 <phase>package</phase>  <goals>
<goal>build</goal>  </goals> </execution> </executions>
                <configuration> <forceTags>true</forceTags> 
<imageName>my/eureka:0.0.1</imageName> 
<baseImage>lwieske/java-8</baseImage> 
<dockerHost>http://192.168.10.72:2375</dockerHost> 
<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>
</plugins> </build>
可以看到，我们在原来的基础上只是新增了<executions/>标签内容，运行测试结果

六 mvn构建docker后并push到私服仓库
<build> <plugins> <plugin> <groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId> <version>0.4.13</version>
<executions> <execution> <id>build-image</id> 
<phase>package</phase>  <goals> <goal>build</goal>  </goals> </execution>                     <execution> <id>image-tag</id>
<phase>package</phase> <goals> <goal>tag</goal> 
</goals> <configuration> <image>my/eureka:0.0.1</image> 
<newName>192.168.10.73:5000/my/eureka:0.0.1</newName> 
</configuration> </execution> <execution> <id>package-push</id>
<phase>package</phase> <goals> <goal>push</goal> 
</goals> <configuration>
<imageName>192.168.10.73:5000/my/eureka:0.0.1</imageName> 
</configuration> </execution> </executions> <configuration>
<forceTags>true</forceTags> 
<imageName>my/eureka:0.0.1</imageName> 
<baseImage>lwieske/java-8</baseImage> 
<dockerHost>http://192.168.10.73:2375</dockerHost> 
<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>
</plugins> </build>可以看到，又绑定了两个命令，类似于在docker中先给镜像打标签后再push到仓库
测试运行

将镜像推送到私有库，报协议错误

error:Get https://192.168.10.73:5000/v1/_ping: http: server gave HTTP response to HTTPS client
在/etc/docker下，创建daemon.json文件，写入：
{ "insecure-registries":["192.168.10.73:5000"]}
或者
1.修改/etc/sysconfig/docker文件，在最后增加一行DOCKER_OPTS
DOCKER_OPTIONS="--insecure-registry 192.168.10.73:5000"
2.修改/usr/lib/systemd/system/docker.service
在[Service]的ExexStart=下面增加一行$DOCKER_OPTIONS

注意:改成自己服务器ip地址

重启docker后，再次执行

push成功，我们看一下远程仓库是否有这个镜像

七 push镜像到docker hub 上

在maven的 settings.xml 中添加
<servers> <server> <id>docker-hub</id> <username>DockerHub 的账号</username>
<password>DockerHub 的密码</password> <configuration> <email>你的eamil</email>
</configuration> </server> </servers>
pom.xml中修改如下
<plugin> <groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId> <version>0.4.13</version>
<configuration> <forceTags>true</forceTags> 
<imageName>my/eureka:0.0.2</imageName> 
<dockerHost>http://192.168.10.73:2375</dockerHost> 
<dockerDirectory>${project.basedir}/src/main/docker</dockerDirectory>
 <resources> <resource> 
<targetPath>/</targetPath> 
<directory>${project.build.directory}</directory>  <include>${project.build.finalName}.jar</include>  </resource> </resources>
                <serverId>docker-hub</serverId> 
</configuration> </plugin>

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