[docker-base]: unsubmodule docker-base.

Convert docker-base from submodule into a regular directory.

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "docker-base"]
-	path = dockers/docker-base
-	url = https://github.com/Azure/sonic-docker-base.git
 [submodule "sonic-swss-common"]
 	path = src/sonic-swss-common
 	url = https://github.com/Azure/sonic-swss-common

dockers/docker-base/Dockerfile

@@ -0,0 +1,41 @@
+FROM debian:jessie
+
+## Clean documentation in FROM image
+RUN find /usr/share/doc -depth \( -type f -o -type l \) ! -name copyright | xargs rm || true
+## Clean doc directories that are empty or only contain empty directories
+RUN while [ -n "$(find /usr/share/doc -depth -type d -empty -print -exec rmdir {} +)" ]; do :; done
+RUN rm -rf                              \
+        /usr/share/man/*                \
+        /usr/share/groff/*              \
+        /usr/share/info/*               \
+        /usr/share/lintian/*            \
+        /usr/share/linda/*              \
+        /var/cache/man/*                \
+        /usr/share/locale/*
+
+## Set the apt source
+COPY sources.list /etc/apt/sources.list
+COPY dpkg_01_drop /etc/dpkg/dpkg.cfg.d/01_drop
+RUN apt-get clean && apt-get update
+
+## Pre-install the fundamental packages
+RUN apt-get -y install                  \
+    rsyslog                             \
+    vim-tiny                            \
+    perl                                \
+    python
+
+COPY rsyslog.conf /etc/rsyslog.conf
+
+RUN apt-get -y purge                    \
+    exim4                               \
+    exim4-base                          \
+    exim4-config                        \
+    exim4-daemon-light
+
+## Clean up apt
+## Remove /var/lib/apt/lists/*, could be obsoleted for derived images
+RUN apt-get clean -y; apt-get autoclean -y; apt-get autoremove -y;      \
+    rm -rf /var/lib/apt/lists/*;                                        \
+    rm -rf /tmp/*;
+

dockers/docker-base/LICENSE

@@ -0,0 +1,14 @@
+Copyright 2016 Microsoft, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+

dockers/docker-base/dpkg_01_drop

@@ -0,0 +1,22 @@
+## Drop unnecessary files
+## ref: https://wiki.ubuntu.com/ReducingDiskFootprint
+
+## Documentation
+path-exclude /usr/share/doc/*
+# we need to keep copyright files for legal reasons
+path-include /usr/share/doc/*/copyright
+path-exclude /usr/share/man/*
+path-exclude /usr/share/groff/*
+path-exclude /usr/share/info/*
+# lintian stuff is small, but really unnecessary
+path-exclude /usr/share/lintian/*
+path-exclude /usr/share/linda/*
+
+## Translations
+path-exclude /usr/share/locale/*
+
+## Landscape
+path-exclude /usr/share/pyshared/twisted/test*
+path-exclude /usr/lib/python*/dist-packages/twisted/test*
+path-exclude /usr/share/pyshared/twisted/*/test*
+path-exclude /usr/lib/python*/dist-packages/twisted/*/test*

dockers/docker-base/rsyslog.conf

@@ -0,0 +1,68 @@
+###############################################################################
+# Managed by Ansible
+# file: ansible/roles/acs/templates/rsyslog.conf.j2
+###############################################################################
+#
+#  /etc/rsyslog.conf    Configuration file for rsyslog.
+#
+#                       For more information see
+#                       /usr/share/doc/rsyslog-doc/html/rsyslog_conf.html
+
+
+#################
+#### MODULES ####
+#################
+
+$ModLoad imuxsock # provides support for local system logging
+#$ModLoad imklog  # provides kernel logging support
+#$ModLoad immark  # provides --MARK-- message capability
+
+# provides UDP syslog reception
+#$ModLoad imudp
+#$UDPServerRun 514
+
+# provides TCP syslog reception
+#$ModLoad imtcp
+#$InputTCPServerRun 514
+
+
+###########################
+#### GLOBAL DIRECTIVES ####
+###########################
+#Set remote syslog server
+*.* @127.0.0.1:514
+
+#
+# Use traditional timestamp format.
+# To enable high precision timestamps, comment out the following line.
+#
+#$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat
+
+# Define a custom template
+$template ACSFileFormat,"%TIMESTAMP% %HOSTNAME% %syslogseverity-text:::uppercase% %syslogtag%%msg:::sp-if-no-1st-sp%%msg:::drop-last-lf%\n"
+$ActionFileDefaultTemplate ACSFileFormat
+
+#
+# Set the default permissions for all log files.
+#
+$FileOwner root
+$FileGroup adm
+$FileCreateMode 0640
+$DirCreateMode 0755
+$Umask 0022
+
+#
+# Where to place spool and state files
+#
+$WorkDirectory /var/spool/rsyslog
+
+#
+# Include all config files in /etc/rsyslog.d/
+#
+$IncludeConfig /etc/rsyslog.d/*.conf
+
+
+###############
+#### RULES ####
+###############
+

dockers/docker-base/sources.list

@@ -0,0 +1,7 @@
+## Debian mirror on Microsoft Azure
+## Ref: http://debian-archive.trafficmanager.net/
+
+deb http://debian-archive.trafficmanager.net/debian/ jessie main contrib non-free
+deb-src http://debian-archive.trafficmanager.net/debian/ jessie main contrib non-free
+deb http://debian-archive.trafficmanager.net/debian-security/ jessie/updates main contrib non-free
+deb-src http://debian-archive.trafficmanager.net/debian-security/ jessie/updates main contrib non-free