#!/bin/sh -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

# By pass if some of the followed modules are not available. 
# This is usually needed or preferred for a specific hardware/distribution.
set +e
# 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
set -e

# Activate KSM (shared memory for KVM)
echo 1 > /sys/kernel/mm/ksm/run

echo "[SlapOS Tweak] Finished at: `date`"
echo "######################################################################"