--- theme: cyanosis highlight: vs2015 author: YX-XiaoBai --- **作者**：[*帅的人都关注了*](https://juejin.cn/user/1688446223263511/posts) **Github**：[*Github*](https://github.com/YX-XiaoBai/) **爱好**：*Americano More Ice !* **项目源码**: [*项目Github源码！Star完再走*](https://github.com/YX-XiaoBai/SpringFamily/tree/master/docker-demo) # 目录 - [目录](#目录) - [前言](#前言) - [什么是Docker镜像](#什么是docker镜像) - [Dockerfile常用命令快查表](#dockerfile常用命令快查表) - [Maven构建Docker镜像-三步曲](#maven构建docker镜像-三步曲) - [1.准备工作](#1准备工作) - [2.执行构建](#2执行构建) - [3.检查结果](#3检查结果) - [扩展](#扩展) ## 前言 > `Docker`大部分应用在提供一些基础设施，如`Redis`/`Mongo`/`Mysql`等，本文主要讲述将自己编写的`Springboot`应用程序打包成`docker`镜像分发出去 ## 什么是Docker镜像掌握核心四点 - 它是一个静态的只读模板 - 它包含构建`Docker`容器的指令 - 它是分层的 - 它通过`Dockerfile`来创建镜像 ## Dockerfile常用命令快查表 | 命令 | 作用 | 例子 | | -- | -- | -- | | FROM | 基于什么镜像 | FROM [:] [AS ] | | LABEL | 设置标签 | LABEL maintainer="Geektime" | | RUN | 运行安装命令 | RUN ["executable", "param1", "param2"] | | CMD | 容器启动时命令(只能有一个) | CMD ["executable", "param1", "param2"] | | ENTRYPOINT | 容器启动后命令(只能有一个) | ENTRYPOINT ["executable", "param1", "param2"] | | VOLUME | 挂载命令 | VOLUME ["/data"] | | EXPOSE | 容器监听端口 | EXPOSE [/] | | ENV | 设置环境变量 | ENV | | ADD | 添加文件 | ADD [--chown=:] ... | | WORKDIR | 设置运行工作目录 | WORKDIR /path/to/workdir | | USER | 设置运行用户 | USER [:] | ## Maven构建Docker镜像-三步曲 ### 1.准备工作 - 来看下 `Dockerfile` 文件 ```sh FROM java:8 EXPOSE 8080 ARG JAR_FILE ADD target/${JAR_FILE} /waiter-service.jar ENTRYPOINT ["java", "-jar","/waiter-service.jar"] ``` - 再看下`pox.xml`核心部分，配置`dockerfile-maven-plugin` ```xml com.spotify dockerfile-maven-plugin 1.4.10 default build push ${docker.image.prefix}/${project.artifactId} ${project.version} ${project.build.finalName}.jar ``` ### 2.执行构建 - 通过`maven`命令来打包生成镜像 ```sh $ mvn clean package -Dmaven.test.skip=true [INFO] Scanning for projects... [INFO] [INFO] -------------< geektime.spring.springbucks:waiter-service >------------- [INFO] Building waiter-service 0.0.1-SNAPSHOT [INFO] --------------------------------[ jar ]--------------------------------- ... ... ... [INFO] Step 2/5 : EXPOSE 8080 [INFO] [INFO] ---> Running in 6ae617f0acdf [INFO] Removing intermediate container 6ae617f0acdf [INFO] ---> 6b182f57247c [INFO] Step 3/5 : ARG JAR_FILE [INFO] [INFO] ---> Running in 9a25b1d1b38c [INFO] Removing intermediate container 9a25b1d1b38c [INFO] ---> 863117cd06f4 [INFO] Step 4/5 : ADD target/${JAR_FILE} /waiter-service.jar [INFO] [INFO] ---> 064b021fac28 [INFO] Step 5/5 : ENTRYPOINT ["java", "-jar","/waiter-service.jar"] [INFO] [INFO] ---> Running in c8b3c173ebad [INFO] Removing intermediate container c8b3c173ebad [INFO] ---> 85fd7a4f7f3d [INFO] Successfully built 85fd7a4f7f3d [INFO] Successfully tagged springbucks/waiter-service:0.0.1-SNAPSHOT [INFO] [INFO] Detected build of image with id 85fd7a4f7f3d [INFO] Building jar: /Users/lidean/gitee/geektime-spring-family/Chapter 10/docker-demo/target/waiter-service-0.0.1-SNAPSHOT-docker-info.jar [INFO] Successfully built springbucks/waiter-service:0.0.1-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 07:18 min [INFO] Finished at: 2021-06-07T10:35:33+08:00 [INFO] ------------------------------------------------------------------------ ``` 可以看到已经构建完了 ### 3.检查结果我们来看下打包好的镜像是否部署成功 ```sh $ docker images REPOSITORY TAG IMAGE ID CREATED SIZE springbucks/waiter-service 0.0.1-SNAPSHOT 85fd7a4f7f3d About a minute ago 683MB ``` 通过`docker run`来执行镜像，再通过`docker logs`可以看到它还在启动 ```sh $ docker run --name waiter-service -d -p 8080:8080 springbucks/waiter-service:0.0.1-SNAPSHOT 28eba6685144634016d7e73c22000265aa14713276242505684e7eb62241954e $ docker logs waiter-service . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.1.3.RELEASE) 2021-06-07 06:36:36.084 INFO 1 --- [ main] g.s.s.waiter.WaiterServiceApplication : Starting WaiterServiceApplication v0.0.1-SNAPSHOT on 28eba6685144 with PID 1 (/waiter-service.jar started by root in /) 2021-06-07 06:36:36.101 INFO 1 --- [ main] g.s.s.waiter.WaiterServiceApplication : No active profile set, falling back to default profiles: default 2021-06-07 06:36:38.937 INFO 1 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode. 2021-06-07 06:36:39.323 INFO 1 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 344ms. Found 2 repository interfaces. 2021-06-07 06:36:41.811 INFO 1 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$f2e71ce] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 2021-06-07 06:36:43.553 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http) 2021-06-07 06:36:43.683 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2021-06-07 06:36:43.684 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.16] 2021-06-07 06:36:43.727 INFO 1 --- [ main] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/usr/java/packages/lib/amd64:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib] 2021-06-07 06:36:44.205 INFO 1 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2021-06-07 06:36:44.206 INFO 1 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 7871 ms 2021-06-07 06:36:44.727 INFO 1 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting... 2021-06-07 06:36:45.430 INFO 1 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed. 2021-06-07 06:36:46.171 INFO 1 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [ name: default ...] 2021-06-07 06:36:46.770 INFO 1 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.3.7.Final} 2021-06-07 06:36:46.775 INFO 1 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found 2021-06-07 06:36:47.578 INFO 1 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.4.Final} 2021-06-07 06:36:49.212 INFO 1 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect 2021-06-07 06:36:52.227 INFO 1 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default' 2021-06-07 06:36:55.609 INFO 1 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor' 2021-06-07 06:36:55.815 WARN 1 --- [ main] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning 2021-06-07 06:36:56.808 INFO 1 --- [ main] o.s.b.a.e.web.EndpointLinksResolver : Exposing 15 endpoint(s) beneath base path '/actuator' 2021-06-07 06:36:57.082 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path '' 2021-06-07 06:36:57.089 INFO 1 --- [ main] g.s.s.waiter.WaiterServiceApplication : Started WaiterServiceApplication in 22.508 seconds (JVM running for 24.292) ``` 再检查下是否运行成功了，可以看到已经成功运行并映射到对应端口了 ```sh $ docker ps | grep springbucks/waiter-service:0.0.1-SNAPSHOT 28eba6685144 springbucks/waiter-service:0.0.1-SNAPSHOT "java -jar /waiter-s…" 3 minutes ago Up 3 minutes 0.0.0.0:8080->8080/tcp waiter-service ``` 最后，我们访问下实际端口，看是否返回对应数据 ```sh $ curl http://127.0.0.1:8080/coffee/1 { "id" : 1, "createTime" : "2021-06-07T14:36:45.551+0800", "updateTime" : "2021-06-07T14:36:45.551+0800", "name" : "espresso", "price" : 20.00 }% ``` ## 扩展 `dockerfile-maven-plugin`也提供了一些辅助的方法，可以通过`deploy`到我指定的仓库里面。可以尝试本地构建一个自己的 `docker` 镜像仓库 `push` 上去 #### 结束语：如果遇到什么疑问或者建议的，可直接留言评论！作者看到会马上一一回复 #### 如果觉得小白此文章不错或对你有所帮助，期待你的一键三连💫！❤️ ni ~