Merge "Make docker image smaller by using Precise"

Dockerfile

@@ -1,4 +1,4 @@
-FROM jayofdoom/docker-ubuntu-14.04
+FROM stackbrew/ubuntu:precise
 
 # The add is before the RUN to ensure we get the latest version of packages
 # Docker will cache RUN commands, but because the SHA1 of the dir will be
@@ -7,9 +7,11 @@ ADD . /tmp/ironic-python-agent
 
 # Install requirements: Python for ironic-python-agent, others for putting an
 # image on disk
-RUN apt-get update && apt-get -y install \
-    python python-pip python-dev \
-    qemu-utils parted util-linux genisoimage git
+RUN apt-get update && \
+    apt-get -y upgrade && \
+    apt-get install -y --no-install-recommends python2.7 python2.7-dev \
+        python-pip qemu-utils parted util-linux genisoimage git gcc && \
+    apt-get clean
 
 # Install requirements separately, because pip understands a git+https url
 # while setuptools doesn't
@@ -17,5 +19,8 @@ RUN pip install -r /tmp/ironic-python-agent/requirements.txt
 
 # This will succeed because all the dependencies were installed previously
 RUN pip install /tmp/ironic-python-agent
+RUN rm -rf /tmp/ironic-python-agent
+
+RUN apt-get -y purge gcc python2.7-dev git && apt-get clean
 
 CMD [ "/usr/local/bin/ironic-python-agent" ]