xsdat2gnuplot

#!/bin/sh -e

vmtype="$1"
filters="$2"
dat_dir="$3"
gnuplot_dir="$4"

function die() {
  echo $1
  exit $2
}

dat_dir=${dat_dir/--help*}
dat_dir=${dat_dir/-h*}
: ${dat_dir:?"
usage: $0 <vmtype> <filters> <dat_dir> [gnuplot_dir]
where:
- vmtype is one of the following values:
  - dom0: returns only dom0 rrd data
  - guests: returns only non-dom0 rrd data
- filters is one or more of the following values:
  - cpu* : for all cpus
  - cpuX : for specific cpu X
  - memory*: for all memory-related data
  - vbd* : for all vbd-related data
  - vbd-hdX*: for a specific vbd X data
  - vbd-hdX-read*: for specific vbd X read data
  - vbd-hdX-write*: for specific vbd X write data
  - vif* : for all vif-related data
  - vif_X* : for specific vif X data
  - vif_X_rx: for specific vif X rx data
  - vif_X_tx: for specific vif X tx data
  You can also use the {} expansion, eg: \"vif_*_{rx,tx}\"
- dat_dir is the location where the .dat files will be read from
- gnuplot_dir is the location where the gnuplot files will be written to
  if gnuplot_dir is not provided, it will use the current directory
eg.: $0 \"vbd_hd{a,d}_{read,write}\" ."
}

[ ! -d "${dat_dir}" ] && die "dat_dir not a directory: ${dat_dir}" 1
: ${gnuplot_dir:="./"}
[ ! -d "${gnuplot_dir}" ] && die "gnuplot_dir not a directory: ${gnuplot_dir}" 2

vms="${dat_dir}/dat-*"
dom0vm=""
guestvms=""
for vm in ${vms}; do
  xapi="`eval echo ${vm}/rrd_data_xapi*`"
  if [ "${xapi:(-3)}" == "dat" ]; then
    dom0vm="${vm}"
  else
    guestvms="${guestvms}${vm} "
  fi
done
if [ "${vmtype}" == "dom0" ]; then
  rangevms="${dom0vm}"
else
  rangevms="${guestvms}"
fi

function gnuplot() {

  logscale="$1"
  shift
  resolution="$1"
  shift
  fn="AVERAGE"

  cd "${dat_dir}"

  echo "#!`which gnuplot`

set terminal wxt size 1024,768
set key font \",6\"
${logscale}
set xdata time
set timefmt \"%s\"
set format x \"%H:%M\"
set xlabel \"time (gmt)\"
set title \""$vmtype" "$@"\"
"
  echo -n "plot "
  for vm in ${rangevms}
  do
    for ty in $@; do
      xtys=`eval echo ${vm}/rrd_data_${ty}_${fn}_$resolution.dat`
      for xty in ${xtys}; do
        echo -n "'${xty}' using 1:2 with linespoints, "
      done
    done
  done |sed -e 's/, $//'
  echo
  echo "pause -1"
}

for filter in ${filters}
do
  for resolution in {600,7200,604800,31622400}
  do
    filename="${vmtype}_rrd_data_${filter/ /_}_$resolution.gnuplot"
    filename_log="${vmtype}_rrd_data_${filter/ /_}_$resolution.logy.gnuplot"
    filepath="${gnuplot_dir}/${filename}"
    filepath_log="${gnuplot_dir}/${filename_log}"
    (gnuplot "" "${resolution}" `eval echo ${filter}` > "${filepath}")
    (gnuplot "set logscale y" "${resolution}" `eval echo ${filter}` > "${filepath_log}")
    echo "${filepath}"
    echo "${filepath_log}"
  done
done