Dockerfile构建Springboot镜像
Dockerfile构建Springboot镜像
文章目录
- Dockerfile构建Springboot镜像
-
- 简介
- 实例演示
-
- 前期准备
-
- Docker环境
- Springboot项目
- Dockerfile文件
- Windows
-
- 要求
- 构建镜像
- 启动测试
- Linux
-
- 要求
- 构建镜像
- 启动测试
简介
容器技术大流行的时代，也是docker大流行的时代。
此文章以一个简单的实例为基础，帮助大家学习和了解：如何使用
Dockerfile指令构建一个Springboot的Java项目镜像。
提示：实例非常简单，旨在帮助大家了解基础知识，本文的知识在实际工作中肯定是不够用的，还需要自行根据实际情况去学习，感谢您的阅读。
实例演示
- 具体操作介绍了
Windows和Linux两种方式。
前期准备
Docker环境
-
Windows请安装
Docker Desktop：https://docs.docker.com/desktop/install/windows-install/ -
Linux请安装
Docker：https://docs.docker.com/desktop/install/linux-install/
Springboot项目
-
源码：learn/java/docker-springboot at main · DingDangDog/learn (github.com)
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Jar包下载地址：docker-springboot-1.0.jar.zip
-
Controller代码示例：
package io.github.dingdangdog.controller;
import io.github.dingdangdog.utils.FileUtilOm;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* say hello
*
* @author DingDangDog
* @since 2022/10/4 11:13
*/
@RestController
@RequestMapping("/say")
public class SayController {
@GetMapping("/hello")
public String hello(String name) {
System.out.println(name);
// 保存文件
FileUtilOm.saveFile("/tmp/", name, name);
return "Hello " + name + " !";
}
}
Dockerfile文件
- 文件名必须为
Dockerfile，无拓展名！！！请放在jar包同级目录下。
# 基础镜像
FROM openjdk:8-jdk
# 作者声明，原为MAINTAINER，变更为LABEL
# MAINTAINER DingDangDog
LABEL author="DingDangDog"
# 容器卷设置
VOLUME /tmp
# 向基础镜像内添加文件，并重命名为`docker_boot.jar`
add docker-springboot-1.0.jar docker_boot.jar
# 执行前置脚本。据说是修改文件时间？不太明白具体作用，望有大佬指点迷津！
RUN bash -c 'touch /docker_boot.jar'
# 最终执行脚本
ENTRYPOINT ["java", "-jar", "/docker_boot.jar"]
# 暴露端口
EXPOSE 10240
指令解析请参考文章：Dockerfile基础一文通
Windows
要求
-
前期准备
-
Windows可以正常启动Docker服务：
如下图，运行状态绿色为正在运行
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构建镜像
-
在jar包所在文件夹下打开
cmd命令行窗口，运行构建命令：docker build -t docker_boot:1.0 .命令解析：
docker build：构建镜像-t docker_boot:1.0：-t=--tag，指定镜像名称为docker_boot，版本为1.0.：指定Dockerfile文件在当前文件夹下
-
构建成功日志如下：
[+] Building 76.3s (9/9) FINISHED => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 254B 0.0s => [internal] load .dockerignore 0.0s => => transferring context: 2B 0.0s => [internal] load metadata for docker.io/library/openjdk:8-jdk 4.6s => [auth] library/openjdk:pull token for registry-1.docker.io 0.0s => [internal] load build context 0.1s => => transferring context: 19.65MB 0.1s => [1/3] FROM docker.io/library/openjdk:8-jdk@sha256:86e863cc57215cfb181bd319736d0baf625fe8f150577f9eb58bd937f5 70.8s => => resolve docker.io/library/openjdk:8-jdk@sha256:86e863cc57215cfb181bd319736d0baf625fe8f150577f9eb58bd937f54 0.0s => => sha256:86e863cc57215cfb181bd319736d0baf625fe8f150577f9eb58bd937f5452cb8 1.04kB / 1.04kB 0.0s => => sha256:3af2ac94130765b73fc8f1b42ffc04f77996ed8210c297fcfa28ca880ff0a217 1.79kB / 1.79kB 0.0s => => sha256:001c52e26ad57e3b25b439ee0052f6692e5c0f2d5d982a00a8819ace5e521452 55.00MB / 55.00MB 24.0s => => sha256:2068746827ec1b043b571e4788693eab7e9b2a95301176512791f8c317a2816a 10.88MB / 10.88MB 13.1s => => sha256:b273004037cc3af245d8e08cfbfa672b93ee7dcb289736c82d0b58936fb71702 7.81kB / 7.81kB 0.0s => => sha256:d9d4b9b6e964657da49910b495173d6c4f0d9bc47b3b44273cf82fd32723d165 5.16MB / 5.16MB 18.0s => => sha256:9daef329d35093868ef75ac8b7c6eb407fa53abbcb3a264c218c2ec7bca716e6 54.58MB / 54.58MB 43.2s => => sha256:d85151f15b6683b98f21c3827ac545188b1849efb14a1049710ebc4692de3dd5 5.42MB / 5.42MB 25.5s => => sha256:52a8c426d30b691c4f7e8c4b438901ddeb82ff80d4540d5bbd49986376d85cc9 210B / 210B 25.3s => => extracting sha256:001c52e26ad57e3b25b439ee0052f6692e5c0f2d5d982a00a8819ace5e521452 1.9s => => sha256:8754a66e005039a091c5ad0319f055be393c7123717b1f6fee8647c338ff3ceb 105.92MB / 105.92MB 68.4s => => extracting sha256:d9d4b9b6e964657da49910b495173d6c4f0d9bc47b3b44273cf82fd32723d165 0.2s => => extracting sha256:2068746827ec1b043b571e4788693eab7e9b2a95301176512791f8c317a2816a 0.2s => => extracting sha256:9daef329d35093868ef75ac8b7c6eb407fa53abbcb3a264c218c2ec7bca716e6 2.1s => => extracting sha256:d85151f15b6683b98f21c3827ac545188b1849efb14a1049710ebc4692de3dd5 0.2s => => extracting sha256:52a8c426d30b691c4f7e8c4b438901ddeb82ff80d4540d5bbd49986376d85cc9 0.0s => => extracting sha256:8754a66e005039a091c5ad0319f055be393c7123717b1f6fee8647c338ff3ceb 2.1s => [2/3] ADD docker-springboot-1.0.jar docker_boot.jar 0.3s => [3/3] RUN bash -c 'touch /docker_boot.jar' 0.4s => exporting to image 0.1s => => exporting layers 0.1s => => writing image sha256:0fcc9c262e90d6a05213ec432924e6835647d233a64ad0747cf7dd406a2a40bd 0.0s => => naming to docker.io/library/docker_boot:1.0 0.0s Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them -
查看镜像
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启动测试
- 启动容器
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- 调用测试
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- 查看本地文件：
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Linux
要求
- 前期准备
构建镜像
-
在jar包所在文件夹下运行构建命令：
docker build -t docker_boot:1.0 .解析：
-
docker build：构建镜像 -
-t docker_boot:1.0：-t=--tag，指定镜像名称为docker_boot，版本为1.0 -
.：指定Dockerfile文件在当前文件夹下
-
-
构建成功日志：
Sending build context to Docker daemon 19.65MB Step 1/7 : FROM openjdk:8-jdk 8-jdk: Pulling from library/openjdk 001c52e26ad5: Pull complete d9d4b9b6e964: Pull complete 2068746827ec: Pull complete 9daef329d350: Pull complete d85151f15b66: Pull complete 52a8c426d30b: Pull complete 8754a66e0050: Pull complete Digest: sha256:86e863cc57215cfb181bd319736d0baf625fe8f150577f9eb58bd937f5452cb8 Status: Downloaded newer image for openjdk:8-jdk ---> b273004037cc Step 2/7 : MAINTAINER DingDangDog ---> Running in 6b19d92591a8 Removing intermediate container 6b19d92591a8 ---> 8a491c04d897 Step 3/7 : VOLUME /tmp ---> Running in 696221f7868c Removing intermediate container 696221f7868c ---> ad7eff7b71e1 Step 4/7 : add docker-springboot-1.0.jar docker_boot.jar ---> 77eb15fd7557 Step 5/7 : RUN bash -c 'touch /docker_boot.jar' ---> Running in 0704d4fd8ab2 Removing intermediate container 0704d4fd8ab2 ---> aa9e4ca18365 Step 6/7 : ENTRYPOINT ["java", "-jar", "/docker_boot.jar"] ---> Running in 78ae0e314f8f Removing intermediate container 78ae0e314f8f ---> cb6f8c91f76c Step 7/7 : EXPOSE 10240 ---> Running in 697a7506c8c8 Removing intermediate container 697a7506c8c8 ---> 20bafbe3127b Successfully built 20bafbe3127b Successfully tagged docker_boot:1.0 -
查看镜像
docker images
启动测试
-
启动容器
docker run -v /var/local/docker/docker-boot-test/tmp:/tmp -p 10240:10240 -d --name docker_boot_test docker_boot:1.0 -
调用测试
curl http://localhost:10240/say/hello?name=ddd # Hello ddd ! -
查看本地文件：
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