docker buildx build never stops

[akosyakov]

Bug description

docker buildx build hangs forever, also could be reproduced with docker export if an image is built with --squash.

Not sure whether it is a bug with docker itself, or some IO limiting, or how we run docker in workspaces?

Steps to reproduce

• Create a Dockerfile with FROM gitpod/workspace-full:latest
• Run docker buildx build -o outdir .
• You maybe need to try several times, but eventually it will stuck and never finish.

Workspace affected

No response

Expected behavior

does not hang

Example repository

No response

Anything else?

No response

[jeanp413]

Looks like a buildx bug indeed, I let it run for half an hour and it didn't finish 😆

[kylos101]

👋 hey there, @akosyakov @jeanp413 ,

I ran a test with buildctl and buildkitd (below), did not have any issues, but, do observe "it takes a while" and "uses a lot of free space".

From a gitpod workspace for buildkit:

pushd /workspace/buildkit/cmd/buildctl
go build .
popd

pushd /workspace/buildkit/cmd/buildkitd
go build .
popd

sudo /workspace/buildkit/cmd/buildkitd/buildkitd --debug --group gitpod --root=/workspace/buildkit &

mkdir ./test-me
echo "FROM gitpod/workspace-full:latest" > ./test-me/Dockerfile

pushd ./test-me
buildctl build  --frontend=dockerfile.v0  --local context=. --local dockerfile=.
popd

I am going to close this issue for now. Let us know if anything else is needed?

cc: @utam0k