echo "---> Updating operating system"
apt-get update -qq
-apt-get upgrade -y --force-yes -qq
+DEBIAN_FRONTEND=noninteractive apt-get upgrade -y --force-yes -qq \
+ -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold"
# we need garethr-docker in our puppet manifest to install docker
# cleanly