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2020/12/13

Spring Boot Jib Maven build image to Docker Hub

使用GoogleContainerTools下的Jib maven plugin build Spring Boot docker image並推送到Docker Hub registry。

在「String Boot Jib Maven build docker image」僅用Jib把local的Spring Boot專案建置成local Docker daemon的image；本篇則是用Jib將Spring Boot專案建置為image後推送到Docker Hub registry。

範例環境：

  • Java 8
  • Spring Boot 2.3.2.RELEASE
  • Maven 3.6.3
  • Docker 19.03.12

註冊一個Docker Hub帳戶並記下帳戶名稱(DOCKER_ID)。

建立Spring Boot專案（參考IntelliJ，Eclipse）。

在專案的pom.xml的<plugins> ... </plugins>中加入Jib maven plugin設定。<image>中的docker_id為Docker Hub帳號。<auth>中為Docker Hub帳號密碼。

<plugin>
    <groupId>com.google.cloud.tools</groupId>
    <artifactId>jib-maven-plugin</artifactId>
    <version>2.7.0</version>
    <configuration>
        <to>
            <image>docker.io/docker_id/spring-boot-demo</image>
            <auth>
                <username>docker_id</username>
                <password>********</password>
            </auth>
        </to>
    </configuration>
</plugin>

參考pom.xml。


將工作目錄移到Spring Boot專案的根目錄下，輸入mvn compile jib:build開始建置image並推送到Docker Hub registry。

~/../spring-boot-demo$ mvn compile jib:build
[INFO] Scanning for projects...
[INFO]
[INFO] ----------------------< com.abc:spring-boot-demo >----------------------
[INFO] Building spring-boot-demo 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ spring-boot-demo ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ spring-boot-demo ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- jib-maven-plugin:2.7.0:build (default-cli) @ spring-boot-demo ---
[WARNING] 'mainClass' configured in 'maven-jar-plugin' is not a valid Java class: ${start-class}
[INFO]
[INFO] Containerizing application to docker_id/spring-boot-demo...
[WARNING] Base image 'gcr.io/distroless/java:8' does not use a specific image digest - build may not be reproducible
[INFO] Using credentials from <to><auth> for docker_id/spring-boot-demo
[INFO] Using base image with digest: sha256:90596f62a8ec0701d00845b85dfccf7f53b5e0bb3c49e275d7f19ea6c3e4565d]
[INFO]
[INFO] Container entrypoint set to [java, -cp, /app/resources:/app/classes:/app/libs/*, com.abc.demo.DemoApplication]
[INFO]
[INFO] Built and pushed image as docker_id/spring-boot-demo
[INFO] Executing tasks:
[INFO] [============================  ] 91.7% complete
[INFO] > launching layer pushers
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  8.091 s
[INFO] Finished at: 2020-12-13T23:28:16+08:00
[INFO] ------------------------------------------------------------------------

完成後便能在Docker Hub的Repositories看到推送的image。


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