docker-maven-plugin

<build>
        <!-- docker 中使用 -->
        <finalName>app</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <!-- docker 打包 -->
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <version>0.2.3</version>
                <configuration>
                    <imageName>${project.name}:${project.version}</imageName>
                    <imageTags>
                        <imageTag>${project.version}</imageTag>
                        <imageTag>latest</imageTag>
                    </imageTags>
                    <dockerDirectory>${project.basedir}/src/main/docker</dockerDirectory>
                    <skipDockerBuild>false</skipDockerBuild>
                    <resources>
                        <resource>
                            <directory>${project.build.directory}</directory>
                            <include>${project.build.finalName}.jar</include>
                        </resource>
                    </resources>
                </configuration>

                <!--直接在package的时候执行docker build-->
                <!--<executions>-->
                    <!--<execution>-->
                        <!--<phase>package</phase>-->
                        <!--<goals>-->
                            <!--<goal>build</goal>-->
                        <!--</goals>-->
                    <!--</execution>-->
                <!--</executions>-->
            </plugin>
        </plugins>
    </build>

• 指定了jar的名称为app

• 指定了docker镜像名为${project.name}:${project.version}

Springboot实例

@SpringBootApplication
@RestController
public class SpringbootDockerDemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringbootDockerDemoApplication.class, args);
    }

    @RequestMapping("/")
    public String index(){
        return "this is index";
    }
}

docker文件

在src/main/docker文件夹下面建立Dockerfile

FROM java:8
# time zone
RUN echo "Asia/Chongqing" > /etc/timezone && dpkg-reconfigure -f noninteractive tzdata
RUN mkdir /app
RUN mkdir /app/logs
ADD app.jar /app/app.jar
ADD runboot.sh /app/
RUN bash -c 'touch /app/app.jar'
WORKDIR /app
RUN chmod a+x runboot.sh
CMD /app/runboot.sh

runboot.sh的内容

sleep 90
java -Djava.security.egd=file:/dev/./urandom -jar /app/app.jar

也可以直接在Dockerfile中用ENTRYPOINT

ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","app.jar"]

设置log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
    <properties>
        <!--定义LOG存储位置-->
        <property name="LOG_HOME">/app/logs</property>
        <!--定义应用名称-->
        <property name="APP_NAME">springboot-docker-demo</property>
    </properties>
    <Appenders>
        <Console name="CONSOLE" target="SYSTEM_OUT">
            <PatternLayout pattern="${APP_NAME} %-d{yyyy-MM-dd HH:mm:ss} [%-5p] (%c{1}:%L) %m%n"/>
        </Console>
        <RollingRandomAccessFile name="ROLLFILE"
                                 fileName="${LOG_HOME}/${APP_NAME}.log"
                                 filePattern="${LOG_HOME}/${APP_NAME}.%d{yyyy-MM-dd-HH}.log">
            <PatternLayout pattern="${APP_NAME} %-d{yyyy-MM-dd HH:mm:ss} [%-5p] (%c{1}:%L) %m%n"/>
            <Policies>
                <!--每隔1小时分割,modulate为true表示以0分为边界-->
                <TimeBasedTriggeringPolicy interval="1" modulate="true"/>
            </Policies>
        </RollingRandomAccessFile>

        <!--async appender-->
        <Async name="Async">
            <appender-ref ref="CONSOLE"/>
            <appender-ref ref="ROLLFILE"/>
        </Async>
    </Appenders>
    <Loggers>
        <Root level="INFO">
            <AppenderRef ref="Async"/>
        </Root>
    </Loggers>
</Configuration>

添加依赖

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <!--use log4j2 instead -->
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
        </dependency>

build镜像

mvn package -Dskip.test=true
mvn docker:build
docker run -d -p 8080:8080 -v /tmp/docker-logs:/app/logs springboot-docker-demo
http://{docker-machine-ip}:8080/

查看日志

docker-machine ssh default
cd /tmp/docker-logs
tail -f springboot-docker-demo.log

工程github:springboot-docker-demo