Can I create elixir release for ARM with my x86 Mac?

Questions / Help
1

I want to deploy my phoenix application to ARM EC2 instance (like t4g.micro).

I have x86 Mac and create elixir release on docker build server.

# Building an Phoenix (Elixir) Release targeting Amazon Linux for EC2
# By https://github.com/treygriffith
# Original by the Phoenix team: https://hexdocs.pm/phoenix/releases.html#containers
#
# Note: Build context should be the application root
# Build Args:
# OTP_VERSION - the OTP version to target, like 23.0
# ELIXIR_VERSION - the Elixir version to target, like 1.10.4
#
# If you have other environment variables in config/prod.secret.exs, add them as `ARG`s in this file

FROM amazonlinux:2 AS build

# https://gist.github.com/techgaun/335ef6f6abb5a254c66d73ac6b390262
RUN yum -y groupinstall "Development Tools" && \
    yum -y install openssl-devel ncurses-devel

# Install Erlang
ARG OTP_VERSION
WORKDIR /tmp
RUN mkdir -p otp && \
    curl -LS "http://erlang.org/download/otp_src_${OTP_VERSION}.tar.gz" --output otp.tar.gz && \
    tar xfz otp.tar.gz -C otp --strip-components=1
WORKDIR otp/
RUN ./configure && make && make install

# Install Elixir
ARG ELIXIR_VERSION
ENV LC_ALL en_US.UTF-8
WORKDIR /tmp
RUN mkdir -p elixir && \
    curl -LS "https://github.com/elixir-lang/elixir/archive/v${ELIXIR_VERSION}.tar.gz" --output elixir.tar.gz && \
    tar xfz elixir.tar.gz -C elixir --strip-components=1
WORKDIR elixir/
RUN make install -e PATH="${PATH}:/usr/local/bin"

# Install node
RUN curl -sL https://rpm.nodesource.com/setup_12.x | bash - && \
    yum install nodejs -y

# Set GitHub Token
ARG GITHUB_TOKEN
ENV GITHUB_TOKEN=$GITHUB_TOKEN

# Our working directory within the container
WORKDIR /opt/build

# Add our release script to the container, named `release` and
# placed into the ./bin/ directory in our project root
ADD ./bin/release ./bin/release

# This is our entry point, make sure to run
# `chmod +x bin/release` to make this script executable
CMD ["bin/release", "master"]

How can I create elixir release for ARM?

1 Like
2

.Don’t “official” erlang base images support the gravitron ARM arch? Could build Elixir images from source on top of the Erlang base image

3

I’m not sure it’s the “best” way, but you can use Qemu to setup an ARM chroot and just build it all natively…

I build a bunch of OS builds somewhat similarly, but using Linux as the host. I setup various chroots that run a native toolchain and as the host is amd64, for any arm/arm64 chroots I use usermode qemu (or whatever it’s called) using binmisc as my emulator. That way I can just enter the chroot and build things “natively”

Usermode qemu is about 5-10x slower than native in my case, but this is satisfactory for my use case

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