Docker + Maven + Docker-compose

前言：

docker：容器化管理

maven：支持docker-maven的插件，通过 mvn clean -Dmaven.test.skip package dockerfile:build 打包命令和配置 Dockerfile 直接打出 docker 镜像

docker-compose：服务端容器编排，使得多个容器可进行批量发布等管理操作

一、集成dockerfile-maven插件

<properties>
    <java.version>1.8</java.version>
    <guava.version>20.0</guava.version>
    <dockerfile-maven-plugin.version>1.3.6</dockerfile-maven-plugin.version>
    <docker-client.version>8.10.1</docker-client.version>
    <!-- Docker镜像仓库 -->
    <docker.registry>xxxx</docker.registry>
    <docker.namespace>xxx</docker.namespace>
    <docker.repo>xx</docker.repo>

    <java.lib>${project.basedir}/src/main/resources/lib</java.lib>
</properties>

<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <!--开启本地引入JAR包-->
                <configuration>
                    <includeSystemScope>true</includeSystemScope>
                </configuration>
            </plugin>
            <plugin>
　　　　　　　　　 <!-- 这里引入dockerfile-maven插件 -->
                <groupId>com.spotify</groupId>
                <artifactId>dockerfile-maven-plugin</artifactId>
                <version>${dockerfile-maven-plugin.version}</version>
                <dependencies>
                    <dependency>
                        <groupId>com.spotify</groupId>
                        <artifactId>docker-client</artifactId>
                        <version>${docker-client.version}</version>
                    </dependency>
                    <dependency>
                        <groupId>com.google.guava</groupId>
                        <artifactId>guava</artifactId>
                        <version>${guava.version}</version>
                    </dependency>
                </dependencies>
                <configuration>
                    <tag>${project.artifactId}-latest</tag>
                    <repository>${docker.registry}/${docker.namespace}/${docker.repo}</repository>
                    <buildArgs>
                        <JAR_FILE>target/${project.build.finalName}.jar</JAR_FILE>
                    </buildArgs>
                </configuration>
            </plugin>
        </plugins>
</build>

二、编写Dockerfile

在pom.xml同级目录下编写Dockerfile

FROM java:8
VOLUME /tmp
ARG JAR_FILE
ADD ${JAR_FILE} app.jar
ENTRYPOINT ["java","-Xmx192m", "-XX:+UseConcMarkSweepGC", "-Djava.security.egd=file:/dev/./urandom","-XX:+HeapDumpOnOutOfMemoryError","-XX:HeapDumpPath=/mnt/logs/heapdump_test.hprof","-jar","/test-1.0.0.RELEASE.jar"]

三、执行mvn dockerfile打包命令

mvn clean -Dmaven.test.skip package dockerfile:build

四、推送到镜像仓库

docker login --username=root registry.cn-xxx.aliyuncs.com

docker tag [镜像ID] registry.cn-xxx.aliyuncs.com/namespace/repo: [镜像版本号]

docker push registry.cn-chengdu.aliyuncs.com/kidcloud/kidcloud_repo: [镜像版本号]

五、安装docker-compose

curl -L "https://github.com/docker/compose/releases/download/1.25.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose
ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
docker-compose –version

六、编写compose的yaml文件

version: '1'
services:
  demo:
    image: ${私服地址}/${命名空间}/${仓库名}:${镜像名称版本号}
    environment:
     - server.port=9001
     - eureka.client.serviceUrl.defaultZone=http://discovery:8761/eureka/
     - JAVA_OPTS='-Xmx512m -Xms512m'
    ports:
     - "9001:9001"
    networks:
     - demoNetwork
    volumes:
     - /mnt/logs:/mnt/logs
    external_links:
     - eureka-server:discovery
networks:
  demoNetwork:
    external: true

image 使用的镜像

external_links 链接yaml编排之外的docker容器
links 链接其他容器
ports 端口映射
expose 暴露端口
volumes 挂载路径
volumes_from 从容器挂载
environment 环境变量

七、docker-compose命令启动容器

docker-compose -f xxx.yaml up -d
docker-compose up -d

更多docker-compose命令：

https://www.cnblogs.com/linjiqin/p/8849432.html