Pull access denied, repository does not exist or may require authorization: server message: insufficient_scope:authorization failed

Question

I am having issues with building a dotnet core image. When I run docker pull mcr.microsoft.com/dotnet/sdk:3.1, this works but my dockerfile build is throwing the error 'failed to load cache key: pull access denied, repository does not exist or may require authorization: server message: insufficient_scope: authorization failed' when I do a docker build -t weatherapi -f Dockerfile . Here's my dockerfile below

FROM mcr.microsoft.com/dotnet/sdk:3.1

WORKDIR /app

COPY *.csproj . 

RUN dotnet restore 

COPY . . 

RUN dotnet publish -c release -o out

FROM mcr.microsoft.com/dotnet/aspnet:3.1

WORKDIR /app

EXPOSE 80

COPY --from=build /app/out .

ENTRYPOINT ["dotnet" "weather.dll"]

Answer 1

It looks like you've got a multi-stage Dockerfile but haven't named any stages. Specifically, the COPY --from=build /app/out . line references a stage named build that is not defined. This should resolve the issue (note the first line defines the build stage):

FROM mcr.microsoft.com/dotnet/sdk:3.1 AS build

WORKDIR /app

COPY *.csproj . 

RUN dotnet restore 

COPY . . 

RUN dotnet publish -c release -o out

FROM mcr.microsoft.com/dotnet/aspnet:3.1

WORKDIR /app

EXPOSE 80

COPY --from=build /app/out .

ENTRYPOINT ["dotnet" "weather.dll"]