[Experimental] Include slapos quick installer script

  This script still on experimental stage, only works for debian 7.
  The preseed.cfg is a pure netinstall debian automation setup, it
  don't install slapos by itself for now.

debian-preseed/README.txt

+Debian Automation
+#################
+
+Those scripts are pure experimentation currently. The script was design to 
+work on debian 7 only. Don't work on somewhere else:
+
+To install slapos
+
+  curl URL_TO_SCRIPT/slapos-quick-install.sh | EMAIL=YYYY COMPUTERNAME=XXXX sh -
+
+The preseed script will be used only to quickly automate debian installation. So, 
+it should not automatically install slapos for the moment.

debian-preseed/slapos-quick-install.sh

+#!/bin/bash
+
+# This Script automates the the setup of SLAPOS Servers with
+# Essential information.
+set -e
+
+if [ -z "$EMAIL" ]; then
+  echo " [ERROR] Please export EMAIL= variable, and rerun the script, it is mandatory for re6stnet"
+  exit 1
+fi
+
+if [ -z "$COMPUTERNAME" ]; then
+  echo " [ERROR] Please export COMPUTERNAME= variable, and rerun the script, it is mandatory for slapos"
+  exit 1
+fi
+
+if [ ! -f /etc/apt/sources.list.d/git.erp5.org.list ]; then
+  gpg --keyserver subkeys.pgp.net --recv-keys 1A716324
+  gpg --export 1A716324 | apt-key add -
+
+  echo "deb http://git.erp5.org/dist/deb ./" > /etc/apt/sources.list.d/git.erp5.org.list
+fi
+
+if [ ! -f /etc/apt/sources.list.d/slapos.list ]; then 
+  echo "deb http://download.opensuse.org/repositories/home:/VIFIBnexedi/Debian_7.0/ ./" | tee /etc/apt/sources.list.d/slapos.list
+  wget -O- "http://download.opensuse.org/repositories/home:/VIFIBnexedi/Debian_7.0/Release.key" | apt-key add -
+fi
+
+apt-get update
+apt-get install -y slapos-node re6stnet
+
+echo "[HACKING] Fixing Package ..."
+rm  -rf /etc/openvpn/vifi*
+rm -rf /etc/opt/slapos/openvpn-needed
+
+service openvpn restart 
+
+sed -i "/tapVPN/d" /etc/cron.d/slapos-node
+
+if [ ! -f /etc/re6stnet/re6stnet.conf ]; then
+  # Register re6stnet.
+  re6st-conf --registry http://re6stnet.nexedi.com/ -r emailAddress $EMAIL -d /etc/re6stnet --anonymous
+
+  echo "table 0" >> /etc/re6stnet/re6stnet.conf
+  echo "interface eth0" >> /etc/re6stnet/re6stnet.conf
+
+  # Restart service
+  /etc/init.d/re6stnet restart
+
+  echo "########################################################################"
+  echo "Generated Configuration, please check if interface eth0 is consistent..."
+  cat /etc/re6stnet/re6stnet.conf
+  echo "########################################################################"
+fi
+
+set +e
+
+IPV6WAITTIME=5
+ping -c 2 re6stnet.nexedi.com
+while [ $? != 0 ]; do
+    sleep 5
+    ping -c 2 re6stnet.nexedi.com
+done
+
+# Wait for native ipv6 connection to be ready 
+i=0
+ping6 -c 2 ipv6.google.com
+while [[ $? != 0 ]] && [[ $i < $IPV6WAITTIME ]]
+do
+    let i++
+    sleep 1
+    ping6 -c 2 ipv6.google.com
+done
+set -e
+
+if [ ! -f /etc/opt/slapos/slapos.cfg ]; then
+  slapos node register $COMPUTERNAME --partition-number 20 --ipv6-interface lo --interface-name eth0
+fi
+
+# Create PKI repository
+if [ ! -f /etc/opt/slapos/slapos.cfg ]; then
+ echo """ /etc/opt/slapos/slapos.cfg don't exist, so we don't progress on tweak """
+ exit 1
+fi
+
+cat > /usr/local/sbin/slapos-tweak << EOF
+#!/bin/bash
+
+set -e
+
+mkdir -v -p -m 0755 `grep ^certificate_repository_path /etc/opt/slapos/slapos.cfg | sed 's/^certificate_repository_path.*= *//'` 
+
+grep ^computer_id /etc/opt/slapos/slapos.cfg | sed 's/^computer_id.*= *//' > /etc/hostname
+hostname -F /etc/hostname
+
+echo """ [SERVER TWEAK] Set sysctl, load kvm_intel and other modules."""
+
+# Setup more server like network parameters in order to avoid
+#    "Neighbour table overflow."
+# Those machines are itself has a lot of interfaces and are in
+# heavily networked environment, so limit of ARP cache for IPv4
+# and IPv6 is 4x higher then default
+# More tuning can be applied from: http://www.enigma.id.au/linux_tuning.txt
+sysctl -w \
+  net.ipv4.neigh.default.gc_thresh1=512 \
+  net.ipv4.neigh.default.gc_thresh2=1024 \
+  net.ipv4.neigh.default.gc_thresh3=2048 \
+  net.ipv6.neigh.default.gc_thresh1=512 \
+  net.ipv6.neigh.default.gc_thresh2=1024 \
+  net.ipv6.neigh.default.gc_thresh3=2048
+
+# Increase default aio-max-nr for sql servers
+sysctl -w fs.aio-max-nr=16777216
+# Increase semaphore limits
+sysctl -w kernel.sem="1250 256000 100 1024"
+
+# Force reboot after kernel panic
+sysctl -w kernel.panic=120
+
+# Yes we hardcode this here for debian
+e2label /dev/sda1 SLAPOS
+
+# Enable noop scheduler for disk which have SLAPOS labeled partition
+disk=\`blkid -L SLAPOS | sed -r -e 's/(\/dev\/|[0-9]*$)//g'\`
+echo noop > /sys/block/\$disk/queue/scheduler
+
+# Set kvm up
+modprobe kvm_intel
+sleep 1
+chmod 666 /dev/kvm
+
+# Set power saving
+modprobe acpi_cpufreq > /dev/null  2>&1
+
+# Set hardware monitoring tools (for Shuttle xh61 machines)
+modprobe coretemp > /dev/null  2>&1
+modprobe f71882fg > /dev/null  2>&1
+
+# Activate KSM (shared memory for KVM)
+echo 1 > /sys/kernel/mm/ksm/run
+
+slapos format --now
+
+EOF
+
+chmod a+x /usr/local/sbin/slapos-tweak
+slapos-tweak
+
+cat > /etc/cron.d/slapos-boot << EOF
+SHELL=/bin/sh
+PATH=/usr/bin:/usr/sbin:/sbin:/bin
+MAILTO=""
+
+@reboot root slapos-tweak
+@reboot root /opt/slapos/bin/bang /etc/opt/slapos/slapos.cfg -m "Reboot." 
+
+EOF
+