项目结构

本项目采用maven构建，有三个模块，分别是pms-interfaces, pms-services, pms-portal。

项目结构截图如下：

使用docker-maven-plugin

0. 其中parent POMs和 pms-interfaces不需要构造镜像，因此需要跳过。

    <!--build plugin-->
    <build>
        <plugins>
            <!--docker-maven-plugin-->
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <configuration>
                    <skipDockerBuild>true</skipDockerBuild>
                </configuration>
            </plugin>
        </plugins>
    </build>

1. pms-services的配置

• POM配置

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
			<!--docker-maven-plugin-->
			<plugin>
				<groupId>com.spotify</groupId>
				<artifactId>docker-maven-plugin</artifactId>
				<configuration>
					<skipDockerBuild>false</skipDockerBuild>
					<imageName>${project.name}:${project.version}</imageName>
					<dockerDirectory>${project.basedir}/docker</dockerDirectory>
					<resources>
						<resource>
							<directory>${project.build.directory}</directory>
							<include>${project.build.finalName}.jar</include>
						</resource>
					</resources>
				</configuration>
			</plugin>
		</plugins>
	</build>

• Dockerfile的定义,位置在项目目录下的docker文件夹中(${project.basedir}/docker)

# Dockerfile
FROM java:8-jre

# 设置工作目录
WORKDIR /app

# 将jar文件拷贝到镜像中。注：docker-maven-plugin 会将jar文件拷贝到构建目录target/docker/中
COPY ./pms-services-1.0-SNAPSHOT.jar /app/app.jar

EXPOSE 20880
CMD ["java", "-jar", "/app/app.jar"]

容器在运行时向外暴露20880端口

2. pms-portal的配置

• POM配置

<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
			<!--docker-maven-plugin-->
			<plugin>
				<groupId>com.spotify</groupId>
				<artifactId>docker-maven-plugin</artifactId>
				<configuration>
					<skipDockerBuild>false</skipDockerBuild>
					<imageName>${project.name}:${project.version}</imageName>
					<dockerDirectory>${project.basedir}/docker</dockerDirectory>
					<resources>
						<resource>
							<directory>${project.build.directory}</directory>
							<include>${project.build.finalName}.jar</include>
						</resource>
					</resources>
				</configuration>
			</plugin>
		</plugins>
	</build>

• Dockerfile的定义,位置在项目目录下的docker文件夹中(${project.basedir}/docker)

# Dockerfile
FROM java:8-jre

# 设置工作目录
WORKDIR /app

# 将jar文件拷贝到镜像中。注：docker-maven-plugin 会将jar文件拷贝到构建目录target/docker/中
COPY ./pms-portal-1.0-SNAPSHOT.jar /app/app.jar

EXPOSE 8000
CMD ["java", "-jar", "/app/app.jar"]

容器在运行时向外暴露8000端口

3. 注意：在使用docker-maven-plugin时，还需要在~/.m2/settings.xml中的pluginGroups节点下增加com.your.plugins

 <!-- pluginGroups
   | This is a list of additional group identifiers that will be searched when resolving plugins by their prefix, i.e.
   | when invoking a command line like "mvn prefix:goal". Maven will automatically add the group identifiers
   | "org.apache.maven.plugins" and "org.codehaus.mojo" if these are not already contained in the list.
   |-->
  <pluginGroups>
    <!-- pluginGroup
     | Specifies a further group identifier to use for plugin lookup.
    <pluginGroup>com.your.plugins</pluginGroup>
    -->
	<pluginGroup>com.spotify</pluginGroup>
  </pluginGroups>

4. 开始构建镜像

• 在docker所在服务中配置tcp绑定

  [root@localhost ~]# cd /etc/docker
  [root@localhost ~]# vim daemon.json
  {
    "registry-mirrors": ["http://b24820b7.m.daocloud.io"],
    "hosts": ["tcp://0.0.0.0:2375", "unix:///var/run/docker.sock"]
  }
  [root@localhost ~]# service docker restart

• 在开发环境中配置环境变量DOCKER_HOST
  
• 开始构建镜像

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

在服务器上运行容器并测试

• 依次运行pms-services, pms-portal

  [root@localhost ~]# docker run -d pms-services:1.0-SNAPSHOT
  [root@localhost ~]# docker run -d -p 8000:8000 pms-portal:1.0-SNAPSHOT

  # provider
    
  dubbo://172.17.0.2:20880/com.lovefly.pms.interfaces.service.TestService?anyhost=true&application=pms-services&dubbo=2.5.3&interface=com.lovefly.pms.interfaces.service.TestService&methods=echo&pid=1&revision=1.0-SNAPSHOT&side=provider&timestamp=1504436089577
    
  # consumer
    
  consumer://172.17.0.3/com.lovefly.pms.interfaces.service.TestService?application=pms-portal&category=consumers&check=false&dubbo=2.5.3&interface=com.lovefly.pms.interfaces.service.TestService&methods=echo&pid=1&revision=1.0-SNAPSHOT&side=consumer&timestamp=1504436100128

• 在浏览器中访问pms-portal
  

• 使用curl测试pms-portal

  [root@localhost docker]# curl -X GET http://192.168.41.128:8000/api/echo?input=ping2222
    ping2222: pong from service
  [root@localhost docker]# 

在容器中配置时区的两种方式

1. 通过docker-compose的volumes配置,跟宿主服务器操持一致

  volumes:
  - "/etc/timezone:/etc/timezone:ro"
  - "/etc/localtime:/etc/localtime:ro"

2. 通过环境变量设置时区

  # 设置时区
  ENV TZ=Asia/Shanghai

在容器中设置hosts

1. 通过docker-compose的extra_host配置

  extra_hosts:
    - "somehost:162.242.195.82"
    - "otherhost:50.31.209.229"

2. 通过命令行参数--add-host设置

  [root@localhost ~]# docker run -d --add-host "service.ielong.cn":172.17.0.4 --add-host "servicewx.ielong.cn":172.17.0.5  pms-services:1.0-SNAPSHOT

参考文档：

• docker-maven-plugin
• configuring the docker daemon port
• docker container timezone
• time-in-docker-containers
• how-to-update-etc-hosts-file-in-docker-image-during-docker-build
• docker-now-supports-adding-host-mappings
• configure-dns