Docker中部署SpringBoot项目

小咪咪 2024-04-03 09:18 65阅读 0赞

#### 一、项目介绍 ####

**1、项目结构：**

![01fd3a0d02484969b47dc4dbd96c9e7c.png][]

**2、pom.xml文件：**

> 1.  `<?xml version="1.0" encoding="UTF-8"?>`
> 2.  `<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"`
> 3.  `xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">`
> 4.  `<modelVersion>4.0.0</modelVersion>`
> 5.  
> 6.  `<groupId>com.example.demo.docker</groupId>`
> 7.  `<artifactId>docker-demo</artifactId>`
> 8.  `<version>0.0.1-SNAPSHOT</version>`
> 9.  `<packaging>jar</packaging>`
> 10. 
> 11. `<name>docker-demo</name>`
> 12. 
> 13. `<parent>`
> 14. `<groupId>com.example.demo</groupId>`
> 15. `<artifactId>springboot-docker</artifactId>`
> 16. `<version>0.0.1-SNAPSHOT</version>`
> 17. `</parent>`
> 18. 
> 19. `<properties>`
> 20. `<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>`
> 21. `<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>`
> 22. `<java.version>1.8</java.version>`
> 23. `</properties>`
> 24. 
> 25. `<dependencies>`
> 26. `<dependency>`
> 27. `<groupId>org.springframework.boot</groupId>`
> 28. `<artifactId>spring-boot-starter</artifactId>`
> 29. `</dependency>`
> 30. 
> 31. `<dependency>`
> 32. `<groupId>org.springframework.boot</groupId>`
> 33. `<artifactId>spring-boot-starter-web</artifactId>`
> 34. `</dependency>`
> 35. 
> 36. `<dependency>`
> 37. `<groupId>org.springframework.boot</groupId>`
> 38. `<artifactId>spring-boot-starter-test</artifactId>`
> 39. `<scope>test</scope>`
> 40. `</dependency>`
> 41. `</dependencies>`
> 42. 
> 43. `<build>`
> 44. `<plugins>`
> 45. `<plugin>`
> 46. `<groupId>org.springframework.boot</groupId>`
> 47. `<artifactId>spring-boot-maven-plugin</artifactId>`
> 48. `</plugin>`
> 49. ``
> 50. `<plugin>`
> 51. `<groupId>com.spotify</groupId>`
> 52. `<artifactId>docker-maven-plugin</artifactId>`
> 53. `<version>1.0.0</version>`
> 54. `<configuration>`
> 55. ``
> 56. `<imageName>springboot/${project.artifactId}</imageName>`
> 57. ``
> 58. `<dockerDirectory>src/main/docker</dockerDirectory>`
> 59. `<resources>`
> 60. `<resource>`
> 61. `<targetPath>/</targetPath>`
> 62. `<directory>${project.build.directory}</directory>`
> 63. `<include>${project.build.finalName}.jar</include>`
> 64. `</resource>`
> 65. `</resources>`
> 66. `</configuration>`
> 67. `</plugin>`
> 68. `</plugins>`
> 69. `</build>`
> 70. 
> 71. `</project>`

**3、DockerDemoApplication.java**

> 1.  `package com.example.demo.docker;`
> 2.  
> 3.  `import org.springframework.boot.SpringApplication;`
> 4.  `import org.springframework.boot.autoconfigure.SpringBootApplication;`
> 5.  `import org.springframework.web.bind.annotation.GetMapping;`
> 6.  `import org.springframework.web.bind.annotation.RestController;`
> 7.  
> 8.  `@SpringBootApplication`
> 9.  `@RestController`
> 10. `public class DockerDemoApplication {`
> 11. 
> 12. `public static void main(String[] args) {`
> 13. `SpringApplication.run(DockerDemoApplication.class, args);`
> 14. `}`
> 15. 
> 16. `/**`
> 17. `* 方法名：`
> 18. `* 功能：`
> 19. `* 描述：`
> 20. `* 创建人：typ`
> 21. `* 创建时间：2018/11/1 13:01`
> 22. `* 修改人：`
> 23. `* 修改描述：`
> 24. `* 修改时间：`
> 25. `*/`
> 26. `@GetMapping("/test")`
> 27. `public String test(){`
> 28. 
> 29. `return "Hello Docker World!";`
> 30. `}`
> 31. `}`

**3.创建文件 src/main/docker/Dockerfile**

> 1.  `FROM openjdk:8-jdk-alpine`
> 2.  `VOLUME /tmp`
> 3.  `ADD docker-demo.jar app.jar`
> 4.  `ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]`

*  VOLUME 指定了临时文件目录为/tmp；
 *  项目的 jar 文件作为 “app.jar” 添加到容器中；
 *  ENTRYPOINT 执行项目 app.jar。为了缩短 Tomcat 启动时间，添加一个系统属性指向 “/dev/urandom” 作为 Entropy Source

#### **二、Docker中部署SpringBoot项目** ####

**1、创建文件夹docker，存放Dockerfile和已经打包好的springboot项目jar**

![a41fcfaff81a488badc4c82c56456c1e.png][]

**2、执行命令构建镜像**

> 1.  `docker build -t docker-demo .`

*  \-t ：镜像的名字及标签，通常 name:tag 或者 name，这里的镜像名为docker-demo；
 *  path ： **.** 点代表当前路径下的所有文件。

**构建过程：**

![5c6aeee684d924b6bc4d4bc164a05ee3.png][]

**3、使用命令查看构建好的镜像 docker images**

![0ddc43af1ff34de288be933ba9368700.png][]

**4、启动镜像**

> 1.  `docker run -d -p 8081:8081 docker-demo # 启动`
> 2.  
> 3.  `docker ps # 查看正在运行的镜像`

![c584da0da5b3456fbc34fec51d6ec76d.png][]

*  \-d 指定容器在后台运行；
 *  \-p 8081:8081 用于将容器内的8081端口映射到主机的8081端口，也可以换成其他本机端口。

**5、浏览器访问**

![4c53bcad2ae55a9128da1f438e8acbba.png][]

[01fd3a0d02484969b47dc4dbd96c9e7c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/03/e00aa9c2e4e841c5b7c6456974907b4e.png
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[5c6aeee684d924b6bc4d4bc164a05ee3.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/03/3ed07be3d32b4ad9977a854cbcd1f363.png
[0ddc43af1ff34de288be933ba9368700.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/03/9b26bd395c8b40509042b75c5bb01ed5.png
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