使用 dockerfile 使用 dotnet core 6 构建镜像，出现错误 NETSDK1064

Question

我尝试使用 .net core 6 构建图像，但是当命令运行到这一行时：

RUN dotnet publish -c release -o /app --no-restore

我遇到错误：

#14 0.629 /usr/share/dotnet/sdk/6.0.101/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(267,5):

错误 NETSDK1064：包 Microsoft.EntityFrameworkCore.Analyzers， 未找到版本 6.0.1。它可能自 NuGet 以来已被删除 恢复。否则，NuGet 恢复可能仅部分完成， 这可能是由于最大路径长度限制造成的。 [/source/Dating_WebAPI.csproj]

所以我检查了我的nuget管理器，我之前没有下载这个包。 但即使我下载了，仍然出现错误。
我错过了什么吗？

以下 Dockerfile：

# https://hub.docker.com/_/microsoft-dotnet
FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /source

# copy csproj and restore as distinct layers
COPY *.csproj .
RUN dotnet restore

# copy everything else and build app
COPY . .
RUN dotnet publish -c release -o /app --no-restore

# final stage/image
FROM mcr.microsoft.com/dotnet/aspnet:6.0
WORKDIR /app
COPY --from=build /app .
ENTRYPOINT ["dotnet", "aspnetapp.dll"]

dockerfile步骤：

[+] Building 12.2s (14/15)                                                                                                                     
 => [internal] load build definition from Dockerfile                                                                                      0.0s
 => => transferring dockerfile: 768B                                                                                                      0.0s
 => [internal] load .dockerignore                                                                                                         0.0s
 => => transferring context: 2B                                                                                                           0.0s
 => [internal] load metadata for mcr.microsoft.com/dotnet/aspnet:latest                                                                   0.3s
 => [internal] load metadata for mcr.microsoft.com/dotnet/sdk:latest                                                                      0.2s
 => [internal] load build context                                                                                                         0.5s
 => => transferring context: 17.79MB                                                                                                      0.5s
 => [build 1/7] FROM mcr.microsoft.com/dotnet/sdk@sha256:a7af03bdead8976d4e3715452fc985164db56840691941996202cea411953452                 0.0s
 => [stage-1 1/3] FROM mcr.microsoft.com/dotnet/aspnet@sha256:7696d5b456eede87434c232b9070f40659ff0c4b71ca622cf197815ccaee661d            0.0s
 => CACHED [stage-1 2/3] WORKDIR /app                                                                                                     0.0s
 => CACHED [build 2/7] WORKDIR /source                                                                                                    0.0s
 => [build 3/7] COPY *.csproj .                                                                                                           0.0s
 => [build 4/7] RUN dotnet clean                                                                                                          0.5s
 => [build 5/7] RUN dotnet restore                                                                                                       10.1s
 => [build 6/7] COPY . .                                                                                                                  0.1s 
 => ERROR [build 7/7] RUN dotnet publish -c release -o /app --no-restore      

Answer 1

从

--no-restore

中删除

dotnet publish

应该可以解决问题。

来自文档https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-publish:

您不必运行 dotnet Restore，因为它由需要进行还原的所有命令隐式运行，例如 dotnet new、dotnet build、dotnet run、dotnet test、dotnetpublish 和 dotnet pack。要禁用隐式恢复，请使用 --no-restore 选项

Answer 2

就我而言，我将

--no-cache /restore

添加到发布阶段。 就像这样：

RUN dotnet publish --no-restore --configuration Release --output /app/publish --no-cache /restore

Answer 3

添加忽略 bin 和 obj 目录的 .dockerignore 文件。

**/bin/
**/obj/