[2874292130] Upstream Reporter: Michael Hofmann
Upstream issue status: Closed
Upstream description:

When using buildah on FC42/Rawhide, /etc/os-release seems to come from the host fs, not the container building environment.

Reproducer:

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$ podman run  --rm  -it --pull=newer --privileged quay.io/fedora/fedora:42 sh -c "dnf install buildah -y; printf 'FROM quay.io/fedora/fedora:40nRUN cat /etc/os-releasenRUN cat /usr/lib/os-release' > Dockerfile; buildah build .; BUILDAH_ISOLATION=chroot buildah build ."|grep PLATFORM_ID
PLATFORM_ID="platform:f40"
PLATFORM_ID="platform:f40"
PLATFORM_ID="platform:f42"
PLATFORM_ID="platform:f40"
$ podman run  --rm  -it --pull=newer --privileged quay.io/fedora/fedora:41 sh -c "dnf install buildah -y; printf 'FROM quay.io/fedora/fedora:40nRUN cat /etc/os-releasenRUN cat /usr/lib/os-release' > Dockerfile; buildah build .; BUILDAH_ISOLATION=chroot buildah build ."|grep PLATFORM_ID
PLATFORM_ID="platform:f40"
PLATFORM_ID="platform:f40"
PLATFORM_ID="platform:f40"
PLATFORM_ID="platform:f40"

This runs a FC container via podman, installs buildah, and than outputs the contents of /etc/os-release and /usr/lib/os-release and greps for the version number, once without BUILDAH_ISOLATION and once with BUILDAH_ISOLATION=chroot.

On FC <= 41, this outputs PLATFORM_ID="platform:f40" four times. On FC >= 42, this outputs the PLATFORM_ID from the host fs once (for BUILDAH_ISOLATION=chroot and /etc/os-release).

Expected behavior: /etc/os-release comes from the container building environment.

Buildah version: {{ buildah x86_64 2:1.39.0-1.fc42 fedora}}