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|
#!/bin/sh
#
# gmetasnapshot - Ganglia gmetad snapshot manager
#
# $FreeBSD: head/sysutils/ganglia-monitor-core/files/gmetasnap.sh 300897 2012-07-14 14:29:18Z beat $
command=`basename $0`
def_rrddir=/var/db/ganglia/rrds
def_snapdir=/var/db/ganglia/snaps
def_snapname=snap
def_comp=gzip
rrddir=$def_rrddir
snapdir=$def_snapdir
snapname=$def_snapname
comp=$def_comp
delete_old=0
quiet=0
usage()
{
exitcode=$1
shift
if [ -n "$*" ]; then
warn $*
fi
cat <<EOU
usage:
${command} [<options>] save [<snapname>]
${command} [<options>] restore [<snapname>]
options:
-D Delete .old file after creating snapshot.
-h Display this message
-q Avoid output unless there is an error.
-r <rrddir> Set the rrddir [default: ${def_rrddir}]
-s <snapdir> Set the snapdir [default: ${def_snapdir}]
-z <comptype> Set the compression type. Valid values are
gzip, bzip2, and none. [default: ${def_comp}]
notes:
- The default snapname is: ${def_snapname}
- ${command} will not create rrddir or snapdir.
EOU
exit $1
}
err()
{
exitcode=$1
shift
echo ${command} $* >&2
exit $exitcode
}
warn()
{
echo ${command} $* >&2
}
status()
{
if [ $quiet -eq 0 ]; then
echo $*
fi
}
compsuffix()
{
case "$1" in
gzip)
echo ".gz"
;;
bzip2)
echo ".bz2"
;;
none)
echo ""
;;
*)
echo "Unsupposed compression type ignored: $1" >&2
echo ""
;;
esac
}
compflag()
{
case "$1" in
gzip)
echo "z"
;;
bzip2)
echo "y"
;;
none)
echo ""
;;
*)
echo "Unsupposed compression type ignored: $1" >&2
echo ""
;;
esac
}
while [ -n "$1" ]; do
case "$1" in
-D)
shift
delete_old=1
;;
-h)
shift
usage 0
;;
-q)
shift
quiet=1
;;
-r)
shift
if [ -z "$1" ]; then
usage 1 "-r requires an argument"
fi
rrddir=$1
shift
;;
-s)
shift
if [ -z "$1" ]; then
usage 1 "-s requires an argument"
fi
snapdir=$1
shift
;;
-z)
shift
if [ -z "$1" ]; then
usage 1 "-z requires an argument"
fi
rrddir=$1
shift
;;
-*)
usage 1 "unknown argument $1"
;;
*)
break
esac
done
if [ -n "$2" ]; then
snapname=$2
fi
basefile=${snapdir}/${snapname}.tar`compsuffix ${comp}`
tarcmd="tar `compflag ${comp}`"
case "$1" in
save)
if [ ! -d ${rrddir} ]; then
err 2 "rrddir ${rrddir} does not exist"
fi
if [ ! -d ${snapdir} ]; then
err 2 "snapdir ${snapdir} does not exist"
fi
status "saving ${rrddir} to ${basefile}"
cd ${rrddir}
if ! ${tarcmd}cf ${basefile}.new .; then
err 2 "Failed to create ${basefile}.new"
fi
if [ -e ${basefile} ]; then
mv ${basefile} ${basefile}.old
sync
fi
mv ${basefile}.new ${basefile}
sync
if [ $delete_old -ne 0 ]; then
rm ${basefile}.old
fi
sync
;;
restore)
for file in ${basefile} ${basefile}.new ${basefile}.old; do
if [ -e ${file} ]; then
if ${tarcmd}tf ${file} >/dev/null 2>&1 ; then
sourcefile=${file}
break
else
warn "${file} exists but is not a valid tarball. Ignoring."
fi
fi
done
if [ -z "$sourcefile" ]; then
err 1 "no snapshot found in ${snapdir}."
fi
status "restoring ${rrddir} from ${sourcefile}"
if [ ! -d "${rrddir}" ]; then
err 1 "${rrddir} does not exist"
fi
cd ${rrddir}
${tarcmd}xpf ${sourcefile}
;;
*)
usage 1 "unknown command: $1"
;;
esac
|
