#!/bin/sh
# this file normally resides in /usr/local/bin
# very specific for our KULeuven setup tough, needs tuning for your systems!
#
# greetz,
#    harry

DISKSIZE="3G"

ARGS=4
E_BADARGS=65

test $# -ne $ARGS && echo -e "Usage: `basename $0` <hostname> <interface> <ip address> <netmask>\nExample: `basename $0` test eth0 10.33.113.207 24" && exit $E_BADARGS

# variables needed for ... ahm... stuff ;)

CONTEXT=$((`cat /usr/local/etc/vservers/*/context | sort -n | tail -n1`  + 1))
# check if there is a valid contextnumber
if [ "$CONTEXT" -lt 2 ]
then
  echo "no valid context number found, bailing out, very scared now!";
  exit 1;
fi
NAME=$1
IF=$2
IP=$3
MASK=$4

# first some basic sanity checks

if [ -b /dev/mapper/vservervg-${NAME}lv ]
then
  echo "biiiiiig problem, logical volume allready exists, bailing out, very scared now!"
  exit 1;
fi

ping -c1 ${IP} > /dev/null
test $? -eq 0 && echo "ip address in use, bailing out, very scared now!" && exit 1;

if [ "${MASK}" -gt 32 ] || [ "${MASK}" -lt 0 ]
then
  echo "netmask out of range, choose one between 0 and 32, bailing out, very scared now!"
  exit 1;
fi


# let's do this!!!

echo -n "creating logical volume: ${NAME}lv ..."
lvcreate -n ${NAME}lv -L ${DISKSIZE} vservervg
test $? -ne 0 && echo "error creating logical volume!!!" && exit 1;
echo "done"

echo -n "creating reiserfs on ${NAME}vg ..."
mkfs.reiserfs -q /dev/vservervg/${NAME}lv
test $? -ne 0 && echo "error creating filesystem!!!" && exit 1;
echo "done"

echo -n "creating mountpoint: /vservers/${NAME} ..."
mkdir /vservers/${NAME}
test $? -ne 0 && echo "error creating mountpoint!!!" && exit 1;
echo "done"

echo -n "creating fstab entry for ${NAME} ..."
echo "/dev/mapper/vservervg-${NAME}lv          /vservers/${NAME}        reiserfs        defaults,attrs,noatime  0       2" >> /etc/fstab
test $? -ne 0 && echo "error creating adding fstab entry!!!" && exit 1;
echo "done"

echo -n "mounting filesystem ..."
mount /vservers/${NAME}
test $? -ne 0 && echo "error mounting filesystem!!!" && exit 1;
echo "done"

echo -n "creating ${NAME} skeleton server ..."
vserver ${NAME} build -m skeleton --context $CONTEXT --hostname ${NAME} --interface ${IF}:${IP}/${MASK}
test $? -ne 0 && echo "error creating skeleton server!!!" && exit 1;
echo "done"

echo -n "setting cpu limits (25% of all), mem limits (1GB vmm, 512MB real) for ${NAME} ..."
echo "sched_prio" > /usr/local/etc/vservers/${NAME}/flags;
mkdir /usr/local/etc/vservers/${NAME}/sched;
echo "1" > /usr/local/etc/vservers/${NAME}/sched/fill-rate;
echo "4" > /usr/local/etc/vservers/${NAME}/sched/interval;
echo "100" > /usr/local/etc/vservers/${NAME}/sched/tokens;
echo "10" > /usr/local/etc/vservers/${NAME}/sched/tokens-min;
echo "1000" > /usr/local/etc/vservers/${NAME}/sched/tokens-max;
echo "0" > /usr/local/etc/vservers/${NAME}/sched/priority-bias;
mkdir /usr/local/etc/vservers/${NAME}/rlimits;
echo "262144" > /usr/local/etc/vservers/${NAME}/rlimits/rss.hard;
echo "131072" > /usr/local/etc/vservers/${NAME}/rlimits/rss.soft;
echo "4096" > /usr/local/etc/vservers/${NAME}/rlimits/nproc;
echo "done"

echo "Now copy the standard server from our config machine."
echo "To start the vserver at boottime, issue the following command:"
echo "echo default > /usr/local/etc/vservers/${NAME}/apps/init/mark"
exit 0