Build only fedora based packages

README.md

@@ -4,32 +4,21 @@ These Dockerfiles are used to build docker images we use for various
 [Elixir](https://hub.docker.com/r/avvo/elixir/tags/) and
 [Erlang](https://hub.docker.com/r/avvo/erlang/tags/) containers at Avvo.
 
-## Development
+These scripts are only to build erlang and elixir images based on Fedora.
+For alpine/ubuntu/debian, please consider [images built by Bob](https://github.com/hexpm/bob#docker-images).
 
-1. Clone this repo
-2. Edit the Dockerfile you want to update
-3. Keep the primary version number of the image in sync with the Elixir version.
-   So tag '1.6.2' should be Elixir version 1.6.2. Any changes to the Dockerfile
-   that are not Elixir version related should increase the letter version.
-4. Build and push an image with a version tag
-
-Calling `push.sh` with no argument will use the directory name as the tag. For
-example, the following command will push an `erlang` image with the tags
-`20.2.4` and `latest` to Dockerhub:
-
-```
-cd erlang/20.2.4
-../../push.sh
-```
+## Build an image
 
-If an argument is passed to `push.sh`, it will be used as a suffix appended with
-a `-` to the current directory name. For example, the following command will
-push an `elixir` image with the tags `1.6.2-b` and `latest` to Dockerhub:
+1. Clone this repo
+2. Run `./push.sh` providing `ELIXIR_VERSION`, `ERLANG_VERSION` and `OS_VERSION` as argiments.
 
+For example:
+```bash
+./push.sh --elixir=1.11.2 --erlang=23.1.2 --os-version=32
 ```
-cd elixir/1.6.2
-../../push.sh b
-```
+will build and push to 2 images:
+ - `avvo/eralng:23.1.2-fedora-32`
+ - `avvo/elixir:1.11.2-erlang-23.1.2-fedora-32`
 
 #### Notes
 
@@ -38,6 +27,52 @@ cd elixir/1.6.2
    namespace.
 2. Test out your changes on a tag before committing and pushing to latest.
 
+## Multistage Docker Build for Production
+
+Lower final image size by using multistage docker build and fedora image.
+
+```Dockerfile
+FROM avvo/elixir:1.11.2-erlang-23.1.2-fedora-32 as build
+
+# install build dependencies
+RUN dnf -y update && dnf -y install \
+    make automake gcc gcc-c++ kernel-devel \
+    git
+
+# install hex + rebar
+RUN mix local.hex --force && \
+    mix local.rebar --force
+
+WORKDIR /srv
+
+COPY . .
+
+ENV MIX_ENV=prod
+
+RUN mix do deps.get --only prod, deps.compile
+RUN mix do compile, release
+
+FROM fedora:32
+
+ENV LANG=C.UTF-8
+
+RUN set -xe \
+  && dnf -y update \
+  && dnf -y install \
+    ncurses-libs \
+    openssl \
+  && dnf -y clean all \
+  && rm -rf /var/cache/yum
+
+EXPOSE 4000
+
+WORKDIR /srv/app_name
+
+COPY --from=build ./srv/_build/prod/rel/app_name .
+
+CMD ["bin/app_name", "start"]
+```
+
 ## License
 
 MIT Licence. Do what you want, this is just configuration, nothing special.

build-elixir.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+set -euox pipefail
+
+elixir=$1
+erlang=$2
+os_version=$3
+os=fedora
+
+tag=${elixir}-erlang-${erlang}-${os}-${os_version}
+erlang_major=$(echo "${erlang}" | awk 'match($0, /^[0-9][0-9]/) { print substr( $0, RSTART, RLENGTH )}')
+
+dockerfile="elixir-${os}.dockerfile"
+
+docker build -t avvo/elixir:${tag} --build-arg ELIXIR=${elixir} --build-arg ERLANG=${erlang} --build-arg ERLANG_MAJOR=${erlang_major} --build-arg OS_VERSION=${os_version} -f ${dockerfile} ./
+
+echo ${tag}

build-erlang.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -euox pipefail
+
+erlang=$1
+os_version=$2
+os=fedora
+
+tag=${erlang}-${os}-${os_version}
+
+dockerfile="erlang-${os}.dockerfile"
+
+docker build -t avvo/erlang:${tag} --build-arg ERLANG=${erlang} --build-arg OS_VERSION=${os_version} -f ${dockerfile} ./
+
+echo ${tag}

elixir-fedora.dockerfile

@@ -0,0 +1,25 @@
+# Adapted from:
+#   https://github.com/hexpm/bob/blob/b0d1aacf386d90ae2a4897ad769b6b074a33b5ae/priv/scripts/docker/elixir-alpine.dockerfile
+
+ARG ARCH
+ARG OS_VERSION
+ARG ERLANG
+
+FROM fedora:${OS_VERSION} AS build
+
+RUN dnf -y update && dnf -y install \
+  wget \
+  ca-certificates \
+  unzip \
+  make
+
+ARG ELIXIR
+ARG ERLANG_MAJOR
+
+RUN wget -q -O elixir.zip "https://repo.hex.pm/builds/elixir/v${ELIXIR}-otp-${ERLANG_MAJOR}.zip" && unzip -d /ELIXIR elixir.zip
+WORKDIR /ELIXIR
+RUN make -o compile DESTDIR=/ELIXIR_LOCAL install
+
+FROM avvo/erlang:${ERLANG}-fedora-${OS_VERSION} AS final
+
+COPY --from=build /ELIXIR_LOCAL/usr/local /usr/local