从spring-maven项目为arm64平台构建Docker镜像

Question

我正在学习Spring课程，我有一个从Spring-initializer构建的maven应用程序(从课程资源下载(。我可以用mvn spring-boot:build-image构建一个本地Docker镜像(项目中没有Dockerfile(。默认情况下，Docker镜像构建为linux/aamd64，但我使用的是M1苹果硅芯片(arm64(。我找了很多变通办法，但都没有成功。最后，我发现可能添加一个Dockerfile并指定它将相应地构建映像的平台。

我的目标是为arm64架构构建一个docker镜像

所以，我创建了一个Dockerfile:

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：

标准maven结构

在终端中，在相同的pom.xml目录下运行：docker buildx build --platform linux/arm64 --tag <mytag> .

日志成功，直到=>正在构建映像"docker.io/myusername/myimage:mytag"，则发生异常，生成失败。

#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守护进程正在运行。不知道为什么它试图访问localhost:2376(在我的项目中没有这样的端口(。我的DOCKER_HOST设置为unix:///var/run/docker.sock并且运行良好。尝试添加到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，端口已在使用中(

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

我怀疑Docker(dind(中可能需要Docker，但我不知道如何在我的Dockerfile中设置它。或者可能是端口绑定配置。

提前感谢您的帮助！！！

注意：我只想在本地构建映像。我不希望推到码头登记处。我不希望在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构建基于ARM的映像，因为Spring Boot集成的Cloud Native Buildpacks构建程序不支持此功能。这是Paketo构建包2022路线图上可能关注的项目之一，你可以投票支持。

CNB为此记录了一个变通方案，但它的设置和运行并不简单。

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

你需要Docker中的Docker来实现这样的功能，因为在Docker容器中运行的CNB构建器进程需要与Docker守护进程进行通信。无论如何，由于上述原因，这将不允许您构建ARM映像。

Answer 2

您可以尝试进行多体系结构构建或仅进行arm64构建。看看fabric8 的docker maven插件