Springboot3 Dockerfile Build Image

jory1002

已于 2023-03-04 08:55:20 修改

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分类专栏：日常文章标签：开发语言 docker java spring

于 2023-03-03 18:05:51 首次发布

本文链接：https://blog.youkuaiyun.com/jory1002/article/details/129324976

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博客介绍了Spring Boot应用的Docker镜像构建过程。先有一个Spring Boot应用并提供API接口，接着在项目根目录添加Dockerfile文件，最后运行docker build image等命令，还涉及docker tag操作。

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首先有一个 springboot 应用, 提供一个 API 接口(Endpoint) springboot demo project
在项目根目录下加一个文件,名为: Dockerfile
运行 docker 命令, docker build image ...

Reference: https://www.baeldung.com/dockerizing-spring-boot-application

运行环境: macOS Venture + docker 4.16.2

# Dockerfile
FROM openjdk:17-jdk-slim-buster
MAINTAINER jory
COPY build/libs/sp3demo-0.0.1-SNAPSHOT.jar sp3demo.jar
ENTRYPOINT ["java","-jar","/sp3demo.jar"]

This file contains the following information:

FROM: As the base for our image, we'll take the Java-enabled Alpine Linux created in the previous section.
MAINTAINER: The maintainer of the image.
COPY: We let Docker copy our jar file into the image.
ENTRYPOINT: This will be the executable to start when the container is booting. We must define them as JSON-Array because we'll use an ENTRYPOINT in combination with a CMD for some application arguments.


docker build & Run

# To create an image from our Dockerfile.
   
# $> docker build --tag=message-server:latest .
    
➜  sp3demo git:(dockerfile) ✗ docker build --tag=sp3demo:latest .
    
➜  sp3demo git:(dockerfile) ✗ docker image ls
    REPOSITORY               TAG       IMAGE ID       CREATED             SIZE
    sp3demo                  latest    d501eca26277   About an hour ago   424MB
    docker/getting-started   latest    3e4394f6b72f   7 weeks ago         47MB
  
# run the container from our image
  
# $> docker run -p8887:8888 message-server:latest
  
docker run -p8089:8081 sp3demo:latest

Issue:
  1. http://localhost:8081/msg works fine but http://localhost:8081/sp3demo/msg does NOT work.
@RequestMapping("sp3demo") is not working.



Docker push
1. 本地登录你的 docker 账号. (我是用 docker desktop 登录好, 然后命令行执行)
2. 给本地image打 tag, tag包含 docker 用户名.

docker tag local_image_name {your name}/image_name

✗ docker tag sp3demo jory1002/sp3demo
✗ docker image ls
REPOSITORY                        TAG                   IMAGE ID       CREATED             SIZE
jory1002/sp3demo                  latest                3eb6eb853858   59 minutes ago      479MB