Dockerfile refactored to use Alpine.

Dockerfile

@@ -1,70 +1,30 @@
-# https://github.com/letsencrypt/letsencrypt/pull/431#issuecomment-103659297
-# it is more likely developers will already have ubuntu:trusty rather
-# than e.g. debian:jessie and image size differences are negligible
-FROM ubuntu:trusty
+FROM python:2-alpine
 MAINTAINER Jakub Warmuz <jakub@warmuz.org>
 MAINTAINER William Budington <bill@eff.org>
 
-# Note: this only exposes the port to other docker containers. You
-# still have to bind to 443@host at runtime, as per the ACME spec.
-EXPOSE 443
-
-# TODO: make sure --config-dir and --work-dir cannot be changed
-# through the CLI (certbot-docker wrapper that uses standalone
-# authenticator and text mode only?)
+EXPOSE 80 443
 VOLUME /etc/letsencrypt /var/lib/letsencrypt
-
 WORKDIR /opt/certbot
-
-# no need to mkdir anything:
-# https://docs.docker.com/reference/builder/#copy
-# If <dest> doesn't exist, it is created along with all missing
-# directories in its path.
-
-ENV DEBIAN_FRONTEND=noninteractive
-
-COPY letsencrypt-auto-source/letsencrypt-auto /opt/certbot/src/letsencrypt-auto-source/letsencrypt-auto
-RUN /opt/certbot/src/letsencrypt-auto-source/letsencrypt-auto --os-packages-only && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/* \
-           /tmp/* \
-           /var/tmp/*
-
-# the above is not likely to change, so by putting it further up the
-# Dockerfile we make sure we cache as much as possible
-
-
-COPY setup.py README.rst CHANGES.rst MANIFEST.in letsencrypt-auto-source/pieces/pipstrap.py /opt/certbot/src/
-
-# all above files are necessary for setup.py and venv setup, however,
-# package source code directory has to be copied separately to a
-# subdirectory...
-# https://docs.docker.com/reference/builder/#copy: "If <src> is a
-# directory, the entire contents of the directory are copied,
-# including filesystem metadata. Note: The directory itself is not
-# copied, just its contents." Order again matters, three files are far
-# more likely to be cached than the whole project directory
-
-COPY certbot /opt/certbot/src/certbot/
-COPY acme /opt/certbot/src/acme/
-COPY certbot-apache /opt/certbot/src/certbot-apache/
-COPY certbot-nginx /opt/certbot/src/certbot-nginx/
-
-
-RUN virtualenv --no-site-packages -p python2 /opt/certbot/venv
-
-# PATH is set now so pipstrap upgrades the correct (v)env
-ENV PATH /opt/certbot/venv/bin:$PATH
-RUN /opt/certbot/venv/bin/python /opt/certbot/src/pipstrap.py && \
-    /opt/certbot/venv/bin/pip install \
-    -e /opt/certbot/src/acme \
-    -e /opt/certbot/src \
-    -e /opt/certbot/src/certbot-apache \
-    -e /opt/certbot/src/certbot-nginx
-
-# install in editable mode (-e) to save space: it's not possible to
-# "rm -rf /opt/certbot/src" (it's stays in the underlaying image);
-# this might also help in debugging: you can "docker run --entrypoint
-# bash" and investigate, apply patches, etc.
-
 ENTRYPOINT [ "certbot" ]
+COPY . src
+
+RUN apk add --no-cache --virtual .certbot-deps \
+        dialog \
+        augeas-libs \
+        libffi \
+        libssl1.0 \
+        wget \
+        ca-certificates \
+        binutils
+RUN apk add --no-cache --virtual .build-deps \
+        gcc \
+        linux-headers \
+        openssl-dev \
+        musl-dev \
+        libffi-dev \
+    && pip install --no-cache-dir \
+        --editable /opt/certbot/src/acme \
+        --editable /opt/certbot/src \
+        --editable /opt/certbot/src/certbot-apache \
+        --editable /opt/certbot/src/certbot-nginx \
+    && apk del .build-deps