前言

今天完成对SpringBoot项目的部署。

准备好SpringBoot项目

构建一个SpringBoot项目，写一个路由hello，访问返回hello world, docker!。

  1. @Slf4j  
  2. @RestController  
  3. @SpringBootApplication  
  4. public class DockerWebApplication implements CommandLineRunner {  
  6.     @Value("${spring.application.name}")  
  7.     private String applicationName;  
  9.     public static void main(String[] args) {  
  10.         SpringApplication.run(DockerWebApplication.class, args);  
  11.     }  
  13.     @GetMapping(value = "/hello")  
  14.     public String hello() {  
  15.         log.info("[hello] hello world, docker!");  
  16.         return "hello world, docker!";  
  17.     }  
  19.     @Override  
  20.     public void run(String... args) throws Exception {  
  21.         log.info("{} 启动成功...", applicationName);  
  22.     }  
  23. }

项目打包

在项目根目录运行mvn clean package将项目打包成jar包，完成之后会在target目录下生成一个可执行的jar文件。

  1. <build>  
  2.     <plugins>
  3.     <!--打包-->
  4.         <plugin>  
  5.             <groupId>org.springframework.boot</groupId>  
  6.             <artifactId>spring-boot-maven-plugin</artifactId>  
  7.         <configuration>
  8.                <mainClass>com.ronan.docker.DockerWebApplication</mainClass>  
  9.             </configuration>        
  10.         </plugin>    
  11.     </plugins>
  12. </build>

编写Dockerfile

在项目根目录编写Dockerfile文件

  1. # 指定基础镜像
  2. FROM java:8  
  4. # 指向了一个`/tmp`的目录，由于Spring Boot使用内置的Tomcat容器，Tomcat默认使用`/tmp`作为工作目录。
  5. VOLUME /tmp
  7. # 项目的`ronan-docker-web.jar`作为`app.jar`添加到容器
  8. ADD ronan-docker-web.jar app.jar
  10. # 指定与外界交互的端口9090
  11. EXPOSE 9090  
  13. # 执行项目app.jar
  14. ENTRYPOINT ["java","-jar","app.jar"]

上传服务器

用工具将jar文件和Dockerfile文件上传到服务器的/workspace工作目录

  1. # 制作镜像
  2. [root@izwz9gvghuefob3ifhv3ppz docker-web]# docker build -t ronan-docker-web .
  3. Sending build context to Docker daemon  19.52MB
  4. Step 1/5 : FROM java:8
  5.  ---> d23bdf5b1b1b
  6. Step 2/5 : VOLUME /tmp
  7.  ---> Running in 76e275045769
  8. Removing intermediate container 76e275045769
  9.  ---> 4493e9815453
  10. Step 3/5 : ADD ronan-docker-web.jar app.jar
  11.  ---> 4de7c3e65497
  12. Step 4/5 : EXPOSE 9090
  13.  ---> Running in efae4a77e05b
  14. Removing intermediate container efae4a77e05b
  15.  ---> cba2a305f4e2
  16. Step 5/5 : ENTRYPOINT ["java","-jar","app.jar"]
  17.  ---> Running in 45641296e12e
  18. Removing intermediate container 45641296e12e
  19.  ---> 1a8a3e60bd47
  20. Successfully built 1a8a3e60bd47
  21. Successfully tagged ronan-docker-web:latest
  23. # 查看镜像
  24. [root@izwz9gvghuefob3ifhv3ppz docker-web]# docker images
  25. REPOSITORY         TAG       IMAGE ID       CREATED          SIZE
  26. ronan-docker-web   latest    1a8a3e60bd47   19 seconds ago   663MB
  27. java               8         d23bdf5b1b1b   5 years ago      643MB
  29. # 创建容器
  30. [root@izwz9gvghuefob3ifhv3ppz docker-web]# docker run -itd --name ronan-docker-web-1 -p 9090:9090 ronan-docker-web:latest
  31. 0d0ce82668e3f01f8022e013383018db4ca54195af00de9af74385e7342a4324
  32. # 查看容器
  33. [root@izwz9gvghuefob3ifhv3ppz docker-web]# docker ps -a
  34. CONTAINER ID   IMAGE                     COMMAND               CREATED         STATUS         PORTS                    NAMES
  35. 0d0ce82668e3   ronan-docker-web:latest   "java -jar app.jar"   6 seconds ago   Up 5 seconds   0.0.0.0:9090->9090/tcp   ronan-docker-web-1
  37. # 进入容器
  38. [root@izwz9gvghuefob3ifhv3ppz docker-web]# docker exec -it 0d0ce82668e3 bash
  39. root@0d0ce82668e3:/# ls -l
  40. total 19124
  41. -rw-r--r--  1 root root 19515332 May  9 16:27 app.jar
  42. drwxr-xr-x  1 root root     4096 Jan 17  2017 bin
  43. drwxr-xr-x  2 root root     4096 Dec 28  2016 boot
  44. drwxr-xr-x  5 root root      360 May 10 15:25 dev
  45. drwxr-xr-x  1 root root     4096 May 10 15:25 etc
  46. drwxr-xr-x  2 root root     4096 Dec 28  2016 home
  47. drwxr-xr-x  1 root root     4096 Jan 17  2017 lib
  48. drwxr-xr-x  2 root root     4096 Jan 16  2017 lib64
  49. drwxr-xr-x  2 root root     4096 Jan 16  2017 media
  50. drwxr-xr-x  2 root root     4096 Jan 16  2017 mnt
  51. drwxr-xr-x  2 root root     4096 Jan 16  2017 opt
  52. dr-xr-xr-x 92 root root        0 May 10 15:25 proc
  53. drwx------  2 root root     4096 Jan 16  2017 root
  54. drwxr-xr-x  3 root root     4096 Jan 16  2017 run
  55. drwxr-xr-x  2 root root     4096 Jan 16  2017 sbin
  56. drwxr-xr-x  2 root root     4096 Jan 16  2017 srv
  57. dr-xr-xr-x 13 root root        0 Jun 29  2021 sys
  58. drwxrwxrwt  5 root root     4096 May 10 15:25 tmp
  59. drwxr-xr-x  1 root root     4096 Jan 17  2017 usr
  60. drwxr-xr-x  1 root root     4096 Jan 17  2017 var

测试

  1. # 请求
  2. ronan@luonandeMacBook-Pro ~ % curl http://120.77.35.233:9090/hello
  4. hello world, docker!

总结

本文是一个Docker部署SpringBoot项目的示例，万变不离其宗。