Docker build pull access denied, repository does not exist or may require

Question

I am trying to generate a Docker Image without using Visual Studio. I am in the project folder and I execute from windows 10 admin command line docker build . I can't figure out how to make this work.

[+] Building 1.3s (8/9)  => [internal] load build definition from Dockerfile                                              0.0s  => => transferring dockerfile: 753B                                                              0.0s  => [internal] load .dockerignore                                                                 0.0s  => => transferring context: 34B                                                                  0.0s  => [internal] load metadata for mcr.microsoft.com/dotnet/core/aspnet:3.1-buster-slim             0.0s  => [base 1/2] FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-buster-slim                          0.0s  => ERROR FROM docker.io/publish/app:latest                                                       1.2s  => => resolve docker.io/publish/app:latest                                                       1.2s  => CACHED [base 2/2] WORKDIR /app                                                                0.0s  => CACHED [final 1/2] WORKDIR /app                                                               0.0s  => [auth] publish/app:pull token for registry-1.docker.io                                        0.0s ------  > FROM docker.io/publish/app:latest: ------ failed to load cache key: pull access denied, repository does not exist or may require authorization: server message: insufficient_scope: authorization failed 

This is my dockerfile:

#See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging. FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-buster-slim AS base WORKDIR /app EXPOSE 80 EXPOSE 443  FROM mcr.microsoft.com/dotnet/core/sdk:3.1-buster AS build WORKDIR /src COPY ["src/App.Web/App.Web.csproj", "src/App.Web/"] RUN dotnet restore "App.Web.csproj" COPY . . WORKDIR "/src/App.Web" RUN dotnet build App.Web.csproj -c Debug -o /app  FROM build as debug RUN dotnet publish "App.Web.csproj" -c Debug -o /app  FROM base as final WORKDIR /app COPY --from=publish/app /app . ENTRYPOINT ["dotnet","App.Web.dll"] 

Answer 1

You have stages called base, build, and debug. Then in the final stage you have:

COPY --from=publish/app /app . 

When docker can't find the stage with that name, publish/app, it tries to find that image, which doesn't exist. I'm guessing you want to copy from the build stage, e.g.

COPY --from=build /app . 

Answer 2

Are you logged in? Try with docker login and then execute docker build once again

As I can see here aspnet in docker hub the repository that you intent to use has been renamed. Use the following instead

from mcr.microsoft.com/dotnet/aspnet:3.1-buster-slim 

Repositories have been renamed and a similar issue can be found here similar issue