error building image: error building stage: failed to get filesystem from image: mkdir /usr/share/file/magic: not a directory

[Anugushashank]

Actual behavior
When kaniko executor is run as a binary from another image, it fails with error
error building image: error building stage: failed to get filesystem from image: mkdir /usr/share/file/magic: not a directory

This issue occurs only when there is a difference in filesystem of container image and the base image of the dockerfile. Ex: /usr/share/file/magic is a directory in the base image whereas it a file in container filesystem.

Why is this happening:
While building a stage, FS is extracted in each layer from tar and gets created on the container except for the mounted directories. While extracting the FS, if there is a dir(/usr/share/file/magic) which needs to be created on the container, and there is already a file(/usr/share/file/magic) with same path on the container then an error(not a directory) is thrown

Expected behavior
Kaniko executor should not fail while creating a dir if there is already a file with the same path.

There should be a check here, if there exists a file with the dir path then it should be deleted before proceeding with the dir creation

To Reproduce
Steps to reproduce the behavior:

1. Build this dockerfile using docker and tag it as container_image, docker build -t container_image .

FROM gcr.io/kaniko-project/executor:debug as kanikoImage

FROM amazoncorretto:11

COPY --from=kanikoImage /kaniko/executor /kaniko/executor

2. Build below docker file using kaniko executor from above created image, docker run -v {dockerfile_location}:/workspace container_image /kaniko/executor --dockerfile /workspace/Dockerfile --no-push --verbosity=trace

FROM python:3.7.6

RUN apt-get update && \
    apt-get install -y virtualenv git default-mysql-client

3. Above build fails with error error building image: error building stage: failed to get filesystem from image: mkdir /usr/share/file/magic: not a directory

Additional Information

Triage Notes for the Maintainers

Description	Yes/No
Please check if this a new feature you are proposing
Please check if the build works in docker but not in kaniko
Please check if this error is seen when you use --cache flag
Please check if your dockerfile is a multistage dockerfile

[defaultcute12]

Hi, is this issue fixed?

[anugu-chegg]

@defaultcute12 Yes. This is released as part of https://github.com/GoogleContainerTools/kaniko/releases/tag/v1.5.0

[vl-shopback]

we got the same issue on Kaniko version : v1.8.1 + amazoncorretto:17

[gulldan]

we got the same issue on Kaniko version : v1.9.2 + nvcr.io/nvidia/deepstream:6.2-devel

[sherman-yang]

get the same issue with Kaniko:v1.9.1

[Aishwarya-Lad]

Has this been fixed? I am getting the same issue with Kaniko:v1.8.0.