Re: [PATCH v2 04/18] tests/docker: update debian-arm64-cross with lci-tool

["Daniel P. Berrangé" <berrange@redhat.com>]

$SUBJECT  =~ s/lci-tool/lcitool/

On Fri, Feb 25, 2022 at 05:20:07PM +0000, Alex Bennée wrote:
> Using lci-tool update debian-arm64-cross to a Debian 11 based system.

Likewise

> As a result we can drop debian-arm64-test-cross just for building
> tests.
> 
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> Message-Id: <20220211160309.335014-5-alex.bennee@linaro.org>
> ---
>  .gitlab-ci.d/container-cross.yml              |  10 +-
>  tests/docker/Makefile.include                 |   3 -
>  .../dockerfiles/debian-arm64-cross.docker     | 186 +++++++++++++++---
>  .../debian-arm64-test-cross.docker            |  13 --
>  tests/lcitool/refresh                         |  11 ++
>  tests/tcg/configure.sh                        |   2 +-
>  6 files changed, 173 insertions(+), 52 deletions(-)
>  delete mode 100644 tests/docker/dockerfiles/debian-arm64-test-cross.docker
> 



> +RUN export DEBIAN_FRONTEND=noninteractive && \
> +    apt-get update && \
> +    apt-get install -y eatmydata && \
> +    eatmydata apt-get dist-upgrade -y && \
> +    eatmydata apt-get install --no-install-recommends -y \
> +            bash \

    ...snip native packages...

> +            texinfo && \
> +    eatmydata apt-get autoremove -y && \
> +    eatmydata apt-get autoclean -y && \
> +    sed -Ei 's,^# (en_US\.UTF-8 .*)$,\1,' /etc/locale.gen && \
> +    dpkg-reconfigure locales
>  
> -RUN apt update && \
> -    DEBIAN_FRONTEND=noninteractive eatmydata \
> -    apt install -y --no-install-recommends \
> -        libbz2-dev:arm64 \
> -        liblzo2-dev:arm64 \
> -        librdmacm-dev:arm64 \
> -        libsnappy-dev:arm64 \
> -        libxen-dev:arm64
> +ENV LANG "en_US.UTF-8"
> +ENV MAKE "/usr/bin/make"
> +ENV NINJA "/usr/bin/ninja"
> +ENV PYTHON "/usr/bin/python3"
> +ENV CCACHE_WRAPPERSDIR "/usr/libexec/ccache-wrappers"
>  
> -# nettle
> -ENV QEMU_CONFIGURE_OPTS $QEMU_CONFIGURE_OPTS --enable-nettle
> +RUN export DEBIAN_FRONTEND=noninteractive && \
> +    dpkg --add-architecture arm64 && \
> +    eatmydata apt-get update && \
> +    eatmydata apt-get dist-upgrade -y && \
> +    eatmydata apt-get install --no-install-recommends -y dpkg-dev && \
> +    eatmydata apt-get install --no-install-recommends -y \
> +            g++-aarch64-linux-gnu \

  ...snip cross packages...

> +            zlib1g-dev:arm64 && \
> +    eatmydata apt-get autoremove -y && \
> +    eatmydata apt-get autoclean -y && \
> +    mkdir -p /usr/local/share/meson/cross && \
> +    echo "[binaries]\n\
> +c = '/usr/bin/aarch64-linux-gnu-gcc'\n\
> +ar = '/usr/bin/aarch64-linux-gnu-gcc-ar'\n\
> +strip = '/usr/bin/aarch64-linux-gnu-strip'\n\
> +pkgconfig = '/usr/bin/aarch64-linux-gnu-pkg-config'\n\
> +\n\
> +[host_machine]\n\
> +system = 'linux'\n\
> +cpu_family = 'aarch64'\n\
> +cpu = 'aarch64'\n\
> +endian = 'little'" > /usr/local/share/meson/cross/aarch64-linux-gnu && \
> +    dpkg-query --showformat '${Package}_${Version}_${Architecture}\n' --show > /packages.txt && \
> +    mkdir -p /usr/libexec/ccache-wrappers && \
> +    ln -s /usr/bin/ccache /usr/libexec/ccache-wrappers/aarch64-linux-gnu-c++ && \
> +    ln -s /usr/bin/ccache /usr/libexec/ccache-wrappers/aarch64-linux-gnu-cc && \
> +    ln -s /usr/bin/ccache /usr/libexec/ccache-wrappers/aarch64-linux-gnu-g++ && \
> +    ln -s /usr/bin/ccache /usr/libexec/ccache-wrappers/aarch64-linux-gnu-gcc
> +
> +ENV ABI "aarch64-linux-gnu"
> +ENV MESON_OPTS "--cross-file=aarch64-linux-gnu"
> +ENV QEMU_CONFIGURE_OPTS --cross-prefix=aarch64-linux-gnu-
> +ENV DEF_TARGET_LIST aarch64-softmmu,aarch64-linux-user

This cross dockerfile is a fully self-contained image.

Traditionally QEMU has had a split image for Debian cross targets,
where there is a base with common native packages, and then a
layer for the cross packages.

lcitool is capable of generating the image in this split format
using the arg

   --layers {all,native,foreign}

Personally I think it is simpler to just use the fully self
contained image, as it would simplify our gitlab pipeline
to only need 1 build stage for containers.  The cost is that
we'll not be sharing layers for native packages and more wall
clock time building since we're installing the same native
packages over & over.

I'm not saying to change your patch, I just wanted to point
out the possibility in case someone cares strongly about
keeping a split layer model for cross containers.

Regards,
Daniel
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