partcomp - Partition Computing for Kickstart

partcomp.sh

#! /bin/sh

# partcomp - Partition Computing for Kickstart
# Copyright (C) 2013 Matous J. Fialka, <http://mjf.cz/>
# Released under the terms of The MIT License

RAM=${1:-4096}
HDD=${2:-512000}

SWAPFS_MAX=32768
SWAPFS_MIN=256
SWAPFS_MUL_BOUNDARY=2048
SWAPFS_MUL_BOUNDARY_LE_MUL=2
SWAPFS_MUL_BOUNDARY_GT_ADD=2048

FSPCT_MAX=20
FS_MAX=5120

HOMEFSPCT_MAX=5
HOMEFS_MAX=1024

VARLOGFSPCT_MAX=10
VARLOGFS_MAX=2048

TMPFSPCT_MAX=10
TMPFS_MAX=10240

bootfs=384

if [ ${RAM} -le ${SWAPFS_MAX} ]
then
  if [ ${RAM} -le ${SWAPFS_MUL_BOUNDARY} ]
  then
    if [ ${RAM} -le $((${SWAPFS_MIN}/2)) ]
    then
      swapfs=${SWAPFS_MIN}
    else
      swapfs=$((SWAPFS_MUL_BOUNDARY_LE_MUL*RAM))
    fi
  else
    swapfs=$((RAM+SWAPFS_MUL_BOUNDARY_GT_ADD))
  fi
else
  swapfs=${SWAPFS_MAX}
fi

fs=$((HDD/100*FSPCT_MAX))
if [ ${fs} -gt ${FS_MAX} ]
then
  fs=${FS_MAX}
fi

homefs=$((HDD/100*HOMEFSPCT_MAX))
if [ ${homefs} -gt ${HOMEFS_MAX} ]
then
  homefs=${HOMEFS_MAX}
fi

varlogfs=$((HDD/100*VARLOGFSPCT_MAX))
if [ ${varlogfs} -gt ${VARLOGFS_MAX} ]
then
  varlogfs=${VARLOGFS_MAX}
fi

varlogauditfs=128

tmpfs=$((HDD/100*TMPFSPCT_MAX))
if [ ${tmpfs} -gt ${TMPFS_MAX} ]
then
  tmpfs=${TMPFS_MAX}
fi

varfs=$((HDD-tmpfs-varlogauditfs-varlogfs-homefs-fs-swapfs-bootfs))

cat <<- EOT
RAM		: ${RAM}
HDD		: ${HDD}
/boot		: ${bootfs}
swap		: ${swapfs}
/		: ${fs}
/home		: ${homefs}
/var		: ${varfs}  (~$((100*varfs/HDD))%)
/var/log	: ${varlogfs}
/var/log/audit	: ${varlogauditfs}
/tmp		: ${tmpfs}
EOT