Update Fedora and CentOS docker images.

- Reduce image size by skipping weak package references.
- Consolidate and sort packages to install.
- Improve consistency between versions.
- Combine yum/dnf install and clean to avoid unwanted caching.
- Don't update existing packages from base image unnecessarily.

test/utils/docker/centos6/Dockerfile

@@ -1,48 +1,49 @@
-# Latest version of centos
 FROM centos:centos6
-RUN yum -y update; yum clean all;
+
-RUN yum -y install \
+RUN yum clean all && \
+    yum -y install epel-release && \
+    yum -y install \
     acl \
     asciidoc \
     bzip2 \
-    epel-release \
     file \
     gcc \
     git \
     make \
     mercurial \
     mysql \
-    mysql-server \
     MySQL-python \
-    rpm-build \
+    mysql-server \
-    rubygems \
-    sed \
-    subversion \
-    sudo \
-    unzip \
     openssh-clients \
     openssh-server \
-    which \
-    zip
-RUN yum -y install \
-    PyYAML \
     python-coverage \
     python-devel \
     python-httplib2 \
-    python-jinja2 \
     python-keyczar \
     python-mock \
     python-nose \
     python-paramiko \
     python-pip \
     python-setuptools \
-    python-virtualenv
+    python-virtualenv \
-RUN pip install --upgrade jinja2
+    PyYAML \
-RUN rpm -e --nodeps python-crypto; pip install pycrypto
+    rpm-build \
+    rubygems \
+    sed \
+    subversion \
+    sudo \
+    unzip \
+    which \
+    zip \
+    && \
+    yum clean all
+
+RUN rpm -e --nodeps python-crypto && pip install --upgrade jinja2 pycrypto
+
 RUN /bin/sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
 RUN mkdir /etc/ansible/
 RUN /bin/echo -e '[local]\nlocalhost ansible_connection=local' > /etc/ansible/hosts
-#VOLUME /sys/fs/cgroup /run /tmp
+VOLUME /sys/fs/cgroup /run /tmp
 RUN ssh-keygen -q -t rsa1 -N '' -f /etc/ssh/ssh_host_key && \
     ssh-keygen -q -t dsa -N '' -f /etc/ssh/ssh_host_dsa_key && \
     ssh-keygen -q -t rsa -N '' -f /etc/ssh/ssh_host_rsa_key && \

test/utils/docker/centos7/Dockerfile

@@ -1,6 +1,5 @@
-# Latest version of centos
 FROM centos:centos7
-RUN yum -y update; yum clean all; yum -y swap fakesystemd systemd
+
 RUN (cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i == systemd-tmpfiles-setup.service ] || rm -f $i; done); \
 rm -f /lib/systemd/system/multi-user.target.wants/*; \
 rm -f /etc/systemd/system/*.wants/*; \
@@ -9,29 +8,23 @@ rm -f /lib/systemd/system/sockets.target.wants/*udev*; \
 rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \
 rm -f /lib/systemd/system/basic.target.wants/*; \
 rm -f /lib/systemd/system/anaconda.target.wants/*;
-RUN yum -y install \
+
+RUN yum clean all && \
+    yum -y install epel-release && \
+    yum -y install \
     acl \
     asciidoc \
-    dbus-python \
     bzip2 \
-    epel-release \
+    dbus-python \
     file \
     git \
     iproute \
     make \
-    mercurial \
     mariadb-server \
+    mercurial \
     MySQL-python \
-    rpm-build \
-    rubygems \
-    subversion \
-    sudo \
-    unzip \
     openssh-clients \
     openssh-server \
-    which
-RUN yum -y install \
-    PyYAML \
     python-coverage \
     python-httplib2 \
     python-jinja2 \
@@ -41,7 +34,18 @@ RUN yum -y install \
     python-paramiko \
     python-pip \
     python-setuptools \
-    python-virtualenv
+    python-virtualenv \
+    PyYAML \
+    rpm-build \
+    rubygems \
+    subversion \
+    sudo \
+    unzip \
+    which \
+    && \
+    yum -y swap fakesystemd systemd && \
+    yum clean all
+
 RUN /usr/bin/sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
 RUN mkdir /etc/ansible/
 RUN /usr/bin/echo -e '[local]\nlocalhost ansible_connection=local' > /etc/ansible/hosts

test/utils/docker/fedora-rawhide/Dockerfile

@@ -1,6 +1,5 @@
-# Latest version of fedora rawhide
 FROM fedora:rawhide
-RUN dnf -y update; dnf clean all
+
 RUN (cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i == systemd-tmpfiles-setup.service ] || rm -f $i; done); \
 rm -f /lib/systemd/system/multi-user.target.wants/*; \
 rm -f /etc/systemd/system/*.wants/*; \
@@ -9,24 +8,27 @@ rm -f /lib/systemd/system/sockets.target.wants/*udev*; \
 rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \
 rm -f /lib/systemd/system/basic.target.wants/*; \
 rm -f /lib/systemd/system/anaconda.target.wants/*;
-RUN dnf -y install \
+
+RUN dnf clean all && \
+    dnf -y --setopt=install_weak_deps=false install \
     acl \
     asciidoc \
-    dbus-python \
     bzip2 \
+    dbus-python \
     file \
     findutils \
     git \
     glibc-locale-source \
     iproute \
     make \
-    mercurial \
     mariadb-server \
+    mercurial \
     MySQL-python \
+    openssh-clients \
+    openssh-server \
     procps \
-    PyYAML \
-    python-coverage \
     python2-dnf \
+    python-coverage \
     python-httplib2 \
     python-jinja2 \
     python-keyczar \
@@ -36,6 +38,7 @@ RUN dnf -y install \
     python-pip \
     python-setuptools \
     python-virtualenv \
+    PyYAML \
     rpm-build \
     rubygems \
     subversion \
@@ -43,10 +46,11 @@ RUN dnf -y install \
     tar \
     unzip \
     which \
-    openssh-clients \
-    openssh-server \
     yum \
-    zip
+    zip \
+    && \
+    dnf clean all
+
 RUN localedef --quiet -c -i en_US -f UTF-8 en_US.UTF-8
 RUN /usr/bin/sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
 RUN mkdir /etc/ansible/

test/utils/docker/fedora23/Dockerfile

@@ -1,6 +1,5 @@
-# Latest version of fedora 23
 FROM fedora:23
-RUN dnf -y update; dnf clean all
+
 RUN (cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i == systemd-tmpfiles-setup.service ] || rm -f $i; done); \
 rm -f /lib/systemd/system/multi-user.target.wants/*; \
 rm -f /etc/systemd/system/*.wants/*; \
@@ -9,24 +8,26 @@ rm -f /lib/systemd/system/sockets.target.wants/*udev*; \
 rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \
 rm -f /lib/systemd/system/basic.target.wants/*; \
 rm -f /lib/systemd/system/anaconda.target.wants/*;
-RUN dnf -y install \
+
+RUN dnf clean all && \
+    dnf -y --setopt=install_weak_deps=false install \
     acl \
     asciidoc \
-    dbus-python \
     bzip2 \
+    dbus-python \
     file \
     findutils \
-    glibc-common \
     git \
     iproute \
     make \
-    mercurial \
     mariadb-server \
+    mercurial \
     MySQL-python \
+    openssh-clients \
+    openssh-server \
     procps \
-    PyYAML \
-    python-coverage \
     python2-dnf \
+    python-coverage \
     python-httplib2 \
     python-jinja2 \
     python-keyczar \
@@ -36,6 +37,7 @@ RUN dnf -y install \
     python-pip \
     python-setuptools \
     python-virtualenv \
+    PyYAML \
     rpm-build \
     rubygems \
     subversion \
@@ -43,12 +45,17 @@ RUN dnf -y install \
     tar \
     unzip \
     which \
-    openssh-clients \
-    openssh-server \
     yum \
-    zip
+    zip \
-RUN localedef --quiet -f ISO-8859-1 -i pt_BR pt_BR
+    && \
-RUN localedef --quiet -f ISO-8859-1 -i es_MX es_MX
+    dnf clean all
+
+RUN dnf -y --setopt=install_weak_deps=false update glibc-common && \
+    localedef --quiet -f ISO-8859-1 -i pt_BR pt_BR && \
+    localedef --quiet -f ISO-8859-1 -i es_MX es_MX && \
+    dnf clean all
+
+RUN localedef --quiet -c -i en_US -f UTF-8 en_US.UTF-8
 RUN /usr/bin/sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
 RUN mkdir /etc/ansible/
 RUN /usr/bin/echo -e '[local]\nlocalhost ansible_connection=local' > /etc/ansible/hosts