From be4cdafa6a67b58f3ad32df51edcdbb146ae3da6 Mon Sep 17 00:00:00 2001
From: Christophe Bliard <christophe.bliard@hiptest.net>
Date: Thu, 23 Aug 2018 14:32:10 +0200
Subject: [PATCH 1/3] Reduce Docker image size from 165 MB to 115 MB

Using multi-stage build available from Docker 17.05 to avoid having any
build artifacts.
---
 Dockerfile | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 1f43de3..2df26ea 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,9 @@
-FROM elixir:1.5.2-alpine
+FROM elixir:1.5.2-alpine AS builder
 
 ENV APP_NAME poxa
 ENV MIX_ENV prod
 
-RUN apk --update add bash git erlang-xmerl erlang-crypto erlang-sasl && rm -rf /var/cache/apk/*
+RUN apk --no-cache add git erlang-xmerl erlang-crypto erlang-sasl
 
 COPY . /source
 WORKDIR /source
@@ -14,6 +14,14 @@ RUN mix compile
 RUN echo "" > config/poxa.prod.conf
 RUN mix release
 
-RUN mkdir /app && cp -r _build/prod/rel/$APP_NAME /app && rm -rf /source
+
+FROM elixir:1.5.2-alpine
+
+ENV APP_NAME poxa
+ENV MIX_ENV prod
+
+RUN apk --no-cache add bash erlang-xmerl erlang-crypto erlang-sasl
+
+COPY --from=builder /source/_build/prod/rel /app
 
 CMD /app/$APP_NAME/bin/$APP_NAME foreground

From 61d56b912d5f4ada5010d39483ababc6bedef91d Mon Sep 17 00:00:00 2001
From: Christophe Bliard <christophe.bliard@hiptest.net>
Date: Thu, 23 Aug 2018 16:52:11 +0200
Subject: [PATCH 2/3] More aggressive reduction of docker image size

From 114 to 32 MB
---
 Dockerfile     | 9 ++++++---
 rel/config.exs | 3 +--
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 2df26ea..bbd521d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,15 +13,18 @@ RUN mix deps.get
 RUN mix compile
 RUN echo "" > config/poxa.prod.conf
 RUN mix release
+RUN mkdir -p /app/$APP_NAME
+WORKDIR /app/$APP_NAME
+RUN tar xzf /source/_build/prod/rel/$APP_NAME/releases/0.7.1/$APP_NAME.tar.gz
 
 
-FROM elixir:1.5.2-alpine
+FROM alpine:3.6
 
 ENV APP_NAME poxa
 ENV MIX_ENV prod
 
-RUN apk --no-cache add bash erlang-xmerl erlang-crypto erlang-sasl
+RUN apk --no-cache add bash openssl
 
-COPY --from=builder /source/_build/prod/rel /app
+COPY --from=builder /app /app
 
 CMD /app/$APP_NAME/bin/$APP_NAME foreground
diff --git a/rel/config.exs b/rel/config.exs
index 4de4e9e..86ad8bc 100644
--- a/rel/config.exs
+++ b/rel/config.exs
@@ -18,7 +18,7 @@ environment :dev do
 end
 
 environment :prod do
-  set include_erts: false
+  set include_erts: true
   set include_src: false
   set cookie: :"xR=}b(ZcHU8M1Lu&642.m{u{O)H]WD>[&&_5t8FW3t5mxy4nw=de~;lEbw*?EFXC"
 end
@@ -30,4 +30,3 @@ release :poxa do
   ]
   plugin Conform.ReleasePlugin
 end
-

From 9133535000f0a7598414b189bff9026bb4465433 Mon Sep 17 00:00:00 2001
From: Christophe Bliard <christophe.bliard@hiptest.net>
Date: Mon, 27 Aug 2018 10:38:12 +0200
Subject: [PATCH 3/3] Remove hardcoded version

---
 Dockerfile | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index bbd521d..745d61b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,14 +8,16 @@ RUN apk --no-cache add git erlang-xmerl erlang-crypto erlang-sasl
 COPY . /source
 WORKDIR /source
 
-RUN mix local.hex --force && mix local.rebar --force
-RUN mix deps.get
-RUN mix compile
+RUN mix do \
+      local.hex --force, \
+      local.rebar --force, \
+      deps.get, \
+      compile
 RUN echo "" > config/poxa.prod.conf
 RUN mix release
 RUN mkdir -p /app/$APP_NAME
 WORKDIR /app/$APP_NAME
-RUN tar xzf /source/_build/prod/rel/$APP_NAME/releases/0.7.1/$APP_NAME.tar.gz
+RUN tar xzf /source/_build/prod/rel/$APP_NAME/releases/*/$APP_NAME.tar.gz
 
 
 FROM alpine:3.6