sergio-ocon
Arm64 Dockerfile failing: ERROR [builder 6/17] RUN mix deps.get --only prod
Hi,
I am trying to build a multiple architecture image using Docker build.
> docker build -t chargio/liveview_counter --push --platform linux/arm64 .
I get an error (139) running this
> [+] Building 7.3s (16/28) docker:desktop-linux
> => [internal] load .dockerignore 0.0s
> => => transferring context: 1.35kB 0.0s
> => [internal] load build definition from Dockerfile 0.0s
> => => transferring dockerfile: 2.54kB 0.0s
> => [internal] load metadata for docker.io/library/debian:bookworm-20230612-slim 0.9s
> => [internal] load metadata for docker.io/hexpm/elixir:1.15.3-erlang-26.0.2-debian-bookworm-20230612-slim 1.0s
> => [builder 1/17] FROM docker.io/hexpm/elixir:1.15.3-erlang-26.0.2-debian-bookworm-20230612-slim@sha256:9fdcffc63a03bf77bf437510634ee7ad182135fc246283986c58fd8686c89326 0.0s
> => => resolve docker.io/hexpm/elixir:1.15.3-erlang-26.0.2-debian-bookworm-20230612-slim@sha256:9fdcffc63a03bf77bf437510634ee7ad182135fc246283986c58fd8686c89326 0.0s
> => [internal] load build context 0.1s
> => => transferring context: 73.36kB 0.1s
> => [deploy 1/6] FROM docker.io/library/debian:bookworm-20230612-slim@sha256:d8f9d38c21495b04d1cca99805fbb383856e19794265684019bf193c3b7d67f9 0.0s
> => => resolve docker.io/library/debian:bookworm-20230612-slim@sha256:d8f9d38c21495b04d1cca99805fbb383856e19794265684019bf193c3b7d67f9 0.0s
> => CACHED [deploy 2/6] RUN apt-get update -y && apt-get install -y libstdc++6 openssl libncurses5 locales && apt-get clean && rm -f /var/lib/apt/lists/*_* 0.0s
> => CACHED [deploy 3/6] RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen 0.0s
> => CACHED [deploy 4/6] WORKDIR /app 0.0s
> => CACHED [deploy 5/6] RUN chown nobody /app 0.0s
> => CACHED [builder 2/17] RUN apt-get update -y && apt-get install -y build-essential git && apt-get clean && rm -f /var/lib/apt/lists/*_* 0.0s
> => CACHED [builder 3/17] WORKDIR /app 0.0s
> => CACHED [builder 4/17] RUN mix local.hex --force && mix local.rebar --force 0.0s
> => CACHED [builder 5/17] COPY mix.exs mix.lock ./ 0.0s
> => ERROR [builder 6/17] RUN mix deps.get --only prod 6.1s
> ------
> > [builder 6/17] RUN mix deps.get --only prod:
> 6.023 qemu: uncaught target signal 11 (Segmentation fault) - core dumped
> 6.036 Segmentation fault
> ------
> Dockerfile:39
> --------------------
> 37 | # install mix dependencies
> 38 | COPY mix.exs mix.lock ./
> 39 | >>> RUN mix deps.get --only $MIX_ENV
> 40 | RUN mkdir config
> 41 |
> --------------------
> ERROR: failed to solve: process "/bin/sh -c mix deps.get --only $MIX_ENV" did not complete successfully: exit code: 139
Blockquote
The same works great when using amd64.
I am using the Dockerfile generated by mix release --docker. And I’ve changed the debian version several times to use ‘bullseye’ - the default, ‘buster’, and ‘bookworm’, with the same result.
Do you know if there is some problem with the arm64 version of the image?
Marked As Solved
cschmatzler
Add ENV ERL_FLAGS="+JPperf true" to your Dockerfile.
Also Liked
garazdawi
I don’t need the JPperf parameter to make it run locally. What does it do? Why is not there by default? The documentation states that it provides profiling, and I am not sure why is needed in this case or what it changes to make the container work.
+JPperf true enables profiling, but it also changes the native code generation to use single page mapping instead of dual. As of Erlang/OTP 26 you can force usage of single page mapping by using +JMsingle true. Using dual page mapping is a security measure agaist possible expoits of bugs in in the JIT, so you normally want this, but as @sucipto sais, qemu has bugs when running using dual mapping so you need to disable it there. From what I can tell, QEMU 8.1 or later should have the bug fixed.
sergio-ocon
This made the trick. Now it is running and my image is published.
My Dockerfile:
# Find eligible builder and runner images on Docker Hub. We use Ubuntu/Debian
# instead of Alpine to avoid DNS resolution issues in production.
#
# https://hub.docker.com/r/hexpm/elixir/tags?page=1&name=ubuntu
# https://hub.docker.com/_/ubuntu?tab=tags
#
# This file is based on these images:
#
# - https://hub.docker.com/r/hexpm/elixir/tags - for the build image
# - https://hub.docker.com/_/debian?tab=tags&page=1&name=bullseye-20230612-slim - for the release image
# - https://pkgs.org/ - resource for finding needed packages
# - Ex: hexpm/elixir:1.15.3-erlang-26.0.2-debian-bullseye-20230612-slim
#
ARG ELIXIR_VERSION=1.15.4
ARG OTP_VERSION=26.0.2
ARG DEBIAN_VERSION=bookworm-20230612-slim
ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
ARG RUNNER_IMAGE="debian:${DEBIAN_VERSION}"
FROM ${BUILDER_IMAGE} as builder
# install build dependencies
RUN apt-get update -y && apt-get install -y build-essential git \
&& apt-get clean && rm -f /var/lib/apt/lists/*_*
# prepare build dir
WORKDIR /app
# install hex + rebar
RUN mix local.hex --force && \
mix local.rebar --force
# set build ENV
ENV MIX_ENV="prod"
ENV ERL_FLAGS="+JPperf true"
# install mix dependencies
COPY mix.exs mix.lock ./
RUN mix deps.get --only $MIX_ENV
RUN mkdir config
# copy compile-time config files before we compile dependencies
# to ensure any relevant config change will trigger the dependencies
# to be re-compiled.
COPY config/config.exs config/${MIX_ENV}.exs config/
RUN mix deps.compile
COPY priv priv
COPY lib lib
COPY assets assets
# compile assets
RUN mix assets.deploy
# Compile the release
RUN mix compile
# Changes to config/runtime.exs don't require recompiling the code
COPY config/runtime.exs config/
COPY rel rel
RUN mix release
# start a new build stage so that the final image will only contain
# the compiled release and other runtime necessities
FROM ${RUNNER_IMAGE} as deploy
RUN apt-get update -y && apt-get install -y libstdc++6 openssl libncurses5 locales \
&& apt-get clean && rm -f /var/lib/apt/lists/*_*
# Set the locale
RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8
WORKDIR "/app"
RUN chown nobody /app
# set runner ENV
ENV MIX_ENV="prod"
# Only copy the final release from the build stage
COPY --from=builder --chown=nobody:root /app/_build/${MIX_ENV}/rel/live_view_counter ./
USER nobody
CMD ["/app/bin/server"]
There is bug in Docker that prevents export of images to work if you are not using the base image too in the same command, so defining the platform as linux/arm64 on its own fails, you need to define both local (amd64) and the cross one (arm64)
% docker build -t chargio/liveview_counter --push --platform linux/amd64,linux/arm64 .
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