从 spring maven 项目为 arm64 平台构建 Docker 图像

Question

我正在上 Spring 课程，我有一个从 spring initializr 构建的 Maven 应用程序（从课程资源下载）。我可以用 mvn spring-boot:build-image 构建本地 Docker 图像（项目中没有 Docker 文件）。默认情况下，Docker 图像构建为 linux/amd64，但我使用的是 M1 Apple Silicon 芯片 (arm64)。我一直在寻找许多解决方法，但没有成功。最后，我发现也许可以添加一个 Docker 文件并指定它会相应地构建图像的平台。

我的目标是为 arm64 架构构建 docker 映像。

所以，我创建了一个 Docker 文件：

FROM --platform=linux/arm64 maven:3.8.4-jdk-11 AS build
COPY src /home/path_to_app/src
COPY pom.xml /home/path_to_app
RUN mvn -f /home/path_to_app/pom.xml spring-boot:build-image -DskipTests

我的项目结构是：

standard maven structure

在终端中，在同一个 pom.xml 目录中运行：docker buildx build --platform linux/arm64 --tag <mytag> .

记录成功，直到 => 构建映像 'docker.io/myusername/myimage:mytag'，然后出现异常，构建失败。

#8 125.7 [INFO] 
#8 125.7 [INFO] <<< spring-boot-maven-plugin:2.5.0:build-image (default-cli) < package @ currency-exchange-service <<<
#8 125.7 [INFO] 
#8 125.7 [INFO] 
#8 125.7 [INFO] --- spring-boot-maven-plugin:2.5.0:build-image (default-cli) @ currency-exchange-service ---
#8 125.8 [INFO] Building image 'docker.io/myname/myimage:0.0.1-SNAPSHOT'
#8 125.8 [INFO]
#8 125.8 [INFO] I/O exception (java.io.IOException) caught when processing request to {}->docker://localhost:2376: com.sun.jna.LastErrorException: [2] No such file or directory
#8 125.8 [INFO] Retrying request to {}->docker://localhost:2376
#8 125.8 [INFO] I/O exception (java.io.IOException) caught when processing request to {}->docker://localhost:2376: com.sun.jna.LastErrorException: [2] No such file or directory
#8 125.8 [INFO] Retrying request to {}->docker://localhost:2376
#8 125.8 [INFO] I/O exception (java.io.IOException) caught when processing request to {}->docker://localhost:2376: com.sun.jna.LastErrorException: [2] No such file or directory
#8 125.8 [INFO] Retrying request to {}->docker://localhost:2376
#8 125.9 [INFO] ------------------------------------------------------------------------
#8 125.9 [INFO] BUILD FAILURE
#8 125.9 [INFO] ------------------------------------------------------------------------
#8 125.9 [INFO] Total time:  02:04 min
#8 125.9 [INFO] Finished at: 2022-03-22T21:08:20Z
#8 125.9 [INFO] ------------------------------------------------------------------------
#8 125.9 [ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.5.0:build-image 
(default-cli) on project currency-exchange-service: Execution default-cli 
of goal org.springframework.boot:spring-boot-maven-plugin:2.5.0:build-image 
failed: Connection to the Docker daemon at 'localhost' failed with error "[2] 
No such file or directory"; ensure the Docker daemon is running and accessible:
com.sun.jna.LastErrorException: [2] No such file or directory -> [Help 1]

我的pom.xml:

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.0</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.somename.microservices</groupId>
    <artifactId>mymicroservice-service</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>mymicroservice-service-docker</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>11</java.version>
        <spring-cloud.version>2020.0.2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-sleuth</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-sleuth-zipkin</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.amqp</groupId>
            <artifactId>spring-rabbit</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>io.github.resilience4j</groupId>
            <artifactId>resilience4j-spring-boot2</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <image>
                        <name>myusername/myprefix${project.artifactId}:${project.version}</name>
                    </image>
                    <pullPolicy>IF_NOT_PRESENT</pullPolicy>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </repository>
    </repositories>

</project>

我的 docker 守护程序是运行ning。无法弄清楚为什么它试图到达 localhost:2376 （我的项目中没有这样的端口）。我的 DOCKER_HOST 设置为 unix:///var/run/docker.sock 并且工作正常。试图添加到 daemon.json:

{
"hosts": ["tcp://127.0.0.1:2376", "unix:///var/run/docker.sock"]
}

但是docker守护进程无法初始化（绑定错误，端口已被使用）

我不知道com.sun.jna.LastErrorException从哪里来。

我怀疑可能需要 docker (dind) 中的 Docker，但我不知道如何在我的 Docker文件。或者可能是端口绑定配置。

在此先感谢您的帮助！！！

注意：我只想在本地构建镜像。我不想推送到 docker 注册表。我不希望构建过程中有任何其他阶段。

Answer 1

目前无法使用 mvn spring-boot:build-image 构建 ARM-based 图像，因为 Spring Boot 集成的 Cloud Native Buildpacks 构建器不支持此功能。这是Paketo buildpacks 2022 roadmap可能关注的项目之一，您可以投票给它。

CNBdocuments a work-around为此，但设置并不简单运行。

RUN mvn -f /home/path_to_app/pom.xml spring-boot:build-image -DskipTests

你需要 Docker-in-Docker 才能完成这样的工作，因为 Docker 容器内运行的 CNB 构建器进程需要与 Docker 通信守护进程。无论如何，由于上述原因，这不允许您构建 ARM 映像。

从 spring maven 项目为 arm64 平台构建 Docker 图像

Building Docker image from spring maven project for arm64 platform

maven

docker

spring-boot

arm64

docker-daemon