Changed: Made docker images much smaller.

nginx-unicorn-rails/Dockerfile

@@ -1,39 +1,44 @@
 FROM delner/ruby:2.3.0
 MAINTAINER David Elner <[email protected]>
 
-RUN apt-get update
+# Install dependencies
+RUN apt-get update && \
+    apt-get install -qq -y nodejs software-properties-common
 
-# Install nodejs
-RUN apt-get install -qq -y nodejs
+# Install Nginx.
+RUN add-apt-repository -y ppa:nginx/stable && apt-get update && \
+    apt-get install -qq -y nginx=1.8.0-1+trusty1 && \
 
-# Intall software-properties-common for add-apt-repository
-RUN apt-get install -qq -y software-properties-common
+    # Cleanup
+    apt-get clean && \
+    cd /var/lib/apt/lists && rm -fr *Release* *Sources* *Packages* && \
+    truncate -s 0 /var/log/*log
 
-# Install Nginx.
-RUN add-apt-repository -y ppa:nginx/stable && apt-get update
-RUN apt-get install -qq -y nginx=1.8.0-1+trusty1
+# Turn off nginx and set owner
 RUN echo "\ndaemon off;" >> /etc/nginx/nginx.conf
 RUN chown -R www-data:www-data /var/lib/nginx
+
 # Add default nginx config
 ADD nginx-sites.conf /etc/nginx/sites-enabled/default
 
-# Install foreman
-RUN gem install foreman
-
-# Install the latest postgresql lib for pg gem
+# Install DB libs
 RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main" > /etc/apt/sources.list.d/pgdg.list && \
     apt-get update && \
     DEBIAN_FRONTEND=noninteractive \
-    apt-get install -y --force-yes libpq-dev
+    apt-get install -y --force-yes libpq-dev libmysqlclient-dev && \
 
-## Install MySQL(for mysql, mysql2 gem)
-RUN apt-get install -qq -y libmysqlclient-dev
+    # Cleanup
+    apt-get clean && \
+    cd /var/lib/apt/lists && rm -fr *Release* *Sources* *Packages* && \
+    truncate -s 0 /var/log/*log
 
 # Install Rails App
 WORKDIR /app
-ONBUILD ADD Gemfile /app/Gemfile
-ONBUILD ADD Gemfile.lock /app/Gemfile.lock
-ONBUILD RUN bundle install
+# Defer installation of gems to run time
+# So we can take advantage of gem data volume
+# ONBUILD ADD Gemfile /app/Gemfile
+# ONBUILD ADD Gemfile.lock /app/Gemfile.lock
+# ONBUILD RUN bundle install
 ONBUILD ADD . /app
 
 # Add default unicorn config

ruby/Dockerfile

@@ -1,14 +1,18 @@
 FROM delner/ubuntu-core:14.04.3
 MAINTAINER David Elner <[email protected]>
 
-RUN apt-get update
-
 # Install ruby dependencies
-RUN apt-get install -y wget curl \
+RUN apt-get update && \
+    apt-get install -y wget curl \
     build-essential git git-core \
-    zlib1g-dev libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev
+    zlib1g-dev libssl-dev libreadline-dev libyaml-dev \
+    libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev && \
+
+    # Cleanup
+    apt-get clean && \
+    cd /var/lib/apt/lists && rm -fr *Release* *Sources* *Packages* && \
+    truncate -s 0 /var/log/*log
 
-RUN apt-get update
 
 # Install Ruby 2.3
 RUN cd /tmp &&\

ubuntu-core/Dockerfile

@@ -1,7 +1,11 @@
 FROM ubuntu:14.04.3
 MAINTAINER David Elner <[email protected]>
 
-RUN apt-get update
-
 # Install core utilities
-RUN apt-get install -y vim screen lsof tcpdump iptraf
+RUN apt-get update -q && \
+    apt-get install -qy vim screen lsof tcpdump iptraf --no-install-recommends &&\
+
+    # Then cleanup
+    apt-get clean && \
+    cd /var/lib/apt/lists && rm -fr *Release* *Sources* *Packages* && \
+    truncate -s 0 /var/log/*log