使用Jib部署SpringBoot应用

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使用Jib,您可以在本机没有安装Docker的情况下构建Docker镜像,并且可以将构建好的镜像推送到远程镜像仓库。本文介绍如何使用Jib插件构建并部署Spring Boot应用。

Jib是什么?

使用Jib,您可以在本机没有安装Docker的情况下为您的Java应用构建优化的Docker和OCI镜像,并且可以将构建好的镜像推送到远程镜像仓库。它提供Maven插件和Gradle插件以及Java库形式。

项目环境

  • Spring Boot 2.3.0.RELEASE
  • Java 8

pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>example</groupId>
    <artifactId>spring-boot-jib-example</artifactId>
    <version>0.1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>com.google.cloud.tools</groupId>
                <artifactId>jib-maven-plugin</artifactId>
                <version>1.8.0</version>

                <configuration>
                    <from>
                        <image>openjdk:8-jdk</image>
                        <!--   <auth>
                             <username>${env.REGISTRY_USERNAME}</username>
                             <password>${env.REGISTRY_PASSWORD}</password>
                           </auth>-->
                    </from>
                    <to>
                        <!-- 阿里云ACR 镜像仓库 -->
                        <image>registry.cn-shenzhen.aliyuncs.com/xxxxxx/spring-boot-jib-demo</image>
                        <tags>
                            <!--maven 内置变量-->
                            <tag>${project.version}</tag>
                        </tags>
                        <auth>
                            <username>${env.REGISTRY_USERNAME}</username>
                            <password>${env.REGISTRY_PASSWORD}</password>
                        </auth>
                    </to>
                    <container>
                        <mainClass>org.example.springbootjibdemo.SpringbootJibDemoApplication</mainClass>
                        <!-- 使用当前时间作为镜像的create-->
                        <creationTime>USE_CURRENT_TIMESTAMP</creationTime>
                        <volumes>
                            <volume>/logs</volume>
                        </volumes>
                    </container>
                    <!--容器相关的属性-->
                    <container>
                        <ports>
                            <port>8080</port>
                        </ports>
                    </container>
                    <!-- 如果私有镜像仓库没有启用https，设置allowInsecureRegistries参数为true-->
                    <allowInsecureRegistries>true</allowInsecureRegistries>

                </configuration>
                <!--      将build绑定到package中,使用mvn package会自动执行build -->
             <!--   <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>build</goal>
                        </goals>
                    </execution>
                </executions>-->
            </plugin>
        </plugins>
    </build>
</project>


Controller

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package org.example.springbootjibdemo.controller;

import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.RequestMapping;

@RestController
public class HelloController {
    
    @RequestMapping("/")
    public String index() {
        return "Greetings from Spring Boot and Jib!";
    }
}

构建镜像并推送到docker仓库

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mvn compile -DskipTests=true jib:build

启动容器

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docker run -it -d --name spring-boot-jib-demo -p 8080:8080 registry.cn-shenzhen.aliyuncs.com/xxxxxx/spring-boot-jib-demo:latest

运行后查看启动容器的情况

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docker ps

测试

浏览器访问 http://localhost:8080