Buildx: Docker build with dockerfile fails

[Aaltis]

• [x] I have uploaded Diagnostics
• [x] I have tried with the latest version of my channel (Stable or Edge)
• Diagnostics ID: DFC9720C-F5C8-41E5-AB29-6BDBC3491743/20201007084617

Expected behavior

Docker should build image.

Actual behavior

[+] Building 0.0s (2/2) FINISHED
 => [internal] load build definition from Dockerfile                                                                                                                                                                                                                                                                   0.0s 
 => => transferring dockerfile: 2B                                                                                                                                                                                                                                                                                     0.0s 
 => [internal] load .dockerignore                                                                                                                                                                                                                                                                                      0.0s 
 => => transferring context: 2B                                                                                                                                                                                                                                                                                        0.0s 
failed to solve with frontend dockerfile.v0: failed to read dockerfile: open /var/lib/docker/tmp/buildkit-mount170234300/Dockerfile: no such file or directory

Information

• Windows Version: Windows 10 Pro Version 2004 os build 19041.508
• Docker Desktop Version: Docker version 19.03.13, build 4484c46d9d (tested also with stable)
• Are you running inside a virtualized Windows e.g. on a cloud server or on a mac VM: nope.

Steps to reproduce the behavior

1. Install Docker Desktop on Windows.
2. Install nginx-image to docker.
3. Create test.dockerfile with:

FROM nginx:latest
ADD . /usr/share/nginx/html

1. Add index.html with only header text.
2. run in folder with dockerfile and index.html powershell terminal command docker build -t website:latest .

[stephen-turner]

Thanks for the reports. Does it fix it if you turn off buildkit (see https://docs.docker.com/docker-for-windows/release-notes/#docker-desktop-community-2400 for instructions)?

[Aaltis]

hmm, looks like dockerfile can't have two parts, "test.dockerfile" is not picked but only "dockerfile" works.
Is this indended?

[joshua-barber]

Thanks for the reports. Does it fix it if you turn off buildkit (see https://docs.docker.com/docker-for-windows/release-notes/#docker-desktop-community-2400 for instructions)?

I've encountered the same issue and can confirm turning off buildkit does resolve it.

Information
Windows Version: Windows 10 Pro Version 10.0.18363 Build 18363
Docker Desktop Version: Docker version 19.03.13 build 4484c46d9d
Are you running inside a virtualized Windows e.g. on a cloud server or on a mac VM: Running locally on Microsoft laptop

Steps to reproduce
Same as Aaltis, here is the test dockerfile I used:

FROM python:3.7
WORKDIR /HOME

Error message

[+] Building 0.1s (2/2) FINISHED
 => [internal] load build definition from Dockerfile                                                               0.1s
 => => transferring dockerfile: 2B                                                                                 0.0s
 => [internal] load .dockerignore                                                                                  0.1s
 => => transferring context: 2B                                                                                    0.0s
failed to solve with frontend dockerfile.v0: failed to read dockerfile: open /var/lib/docker/tmp/buildkit-mount848492301/Dockerfile: no such file or directory

[stephen-turner]

OK, thanks, I'm going to transfer this ticket to the buildx repo.

[tonistiigi]

docker build -t website:latest . is not supposed to work with test.dockerfile. docker build -f test.dockerfile -t website:latest .

[joshua-barber]

My dockerfile was named dockerfile and still encountered the build failure. Should I be creating a new github issue then?

docker build -t website:latest . is not supposed to work with test.dockerfile. docker build -f test.dockerfile -t website:latest .