.NET 7应用构建ARM64容器报错及优化方案咨询

我有一个.NET 7应用，需要部署在树莓派Compute Module 4（ARM64架构）的容器中，计划将构建好的ARM64镜像推送到容器仓库，再由树莓派拉取运行。

现有Dockerfile #

# Stage 1: Build the application
FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:7.0 AS build

WORKDIR /app

COPY . .

RUN dotnet publish -c Release -o out

# Stage 2: Create the final image
FROM mcr.microsoft.com/dotnet/aspnet:7.0 AS runtime

WORKDIR /app

COPY --from=build /app/out .

ENTRYPOINT ["dotnet", "MyApp.dll"]

构建报错情况 #

使用命令docker build -t app --platform linux/amd64 .构建Linux/AMD64镜像可正常运行，但执行docker build -t beacon --platform linux/arm64 .构建ARM64镜像时，第8行出现如下错误：

> [build 4/4] RUN dotnet publish -c Release -o out:
0.285 exec /bin/sh: exec format error
------
Dockerfile:8
--------------------
   6 |     COPY . .
   7 |     
   8 | >>> RUN dotnet publish -c Release -o out
   9 |     
  10 |     # Stage 2: Create the final image
--------------------
ERROR: failed to solve: process "/bin/sh -c dotnet publish -c Release -o out" did not complete successfully: exit code: 1

疑问点 #

1. 当前Dockerfile或ARM64构建命令是否存在问题？
2. 有无更优的ARM64镜像构建、推送并让树莓派拉取运行的方案？

已解决方案：使用Docker Buildx #

通过Docker Buildx解决了跨架构构建问题，以下是支持生产和开发阶段的Makefile：

setup_builder:
    docker buildx create --use
    docker buildx create --use --name app_builder --use
    docker buildx inspect app_builder --bootstrap

build_development:
    docker buildx build --platform linux/amd64 -t app:latest . --load

build_production:
    docker buildx build --platform linux/arm64 -t app:latest .

compose:
    docker-compose up

本地运行用的Docker Compose配置：

version: '3.4'

services:
  my-service:
    image: app:latest
    volumes:
      - a_file:/app/a_file
      - another_file:/app/another_file
      - yet_another_file:/app/yet_another_file
    network_mode: host

内容的提问来源于stack exchange，提问作者kostas