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

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

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

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

2 Likes