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lvm2/scripts/lvm_dump.sh

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#!/bin/bash
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# we use some bash-isms (getopts?)
# lvm_dump: This script is used to collect pertinent information for
# the debugging of lvm issues.
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# following external commands are used throughout the script
# which, echo and test are internal in bash at least
MKDIR=mkdir # need -p
TAR=tar # need czf
RM=rm # need -rf
CP=cp
TAIL=tail # we need -n
LS=ls # need -la
PS=ps # need alx
SED=sed
DD=dd
CUT=cut
DATE=date
BASENAME=basename
UNAME=uname
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# user may override lvm and dmsetup location by setting LVM_BINARY
# and DMSETUP_BINARY respectively
LVM=${LVM_BINARY-lvm}
DMSETUP=${DMSETUP_BINARY-dmsetup}
die() {
code=$1; shift
echo "$@" 1>&2
exit $code
}
# which should error out if the binary is not executable, although i
# am not sure we can rely on this
which $LVM >& /dev/null || die 2 "Fatal: could not find lvm binary '$LVM'"
test -x `which $LVM` || die 2 "Fatal: lvm binary '$LVM' not executable"
which $DMSETUP >& /dev/null || die 2 "Fatal: could not find dmsetup binary '$DMSETUP'"
test -x `which $DMSETUP` || die 2 "Fatal: dmsetup binary '$DMSETUP' not executable"
function usage {
echo "$0 [options]"
echo " -h print this message"
echo " -a advanced collection - warning: if lvm is already hung,"
echo " then this script may hang as well if -a is used"
echo " -m gather LVM metadata from the PVs"
echo " -d <directory> dump into a directory instead of tarball"
echo " -c if running clvmd, gather cluster data as well"
echo ""
exit 1
}
advanced=0
clustered=0
metadata=0
while getopts :acd:hm opt; do
case $opt in
s) sysreport=1 ;;
a) advanced=1 ;;
c) clustered=1 ;;
d) userdir=$OPTARG ;;
h) usage ;;
m) metadata=1 ;;
:) echo "$0: $OPTARG requires a value:"; usage ;;
\?) echo "$0: unknown option $OPTARG"; usage ;;
*) usage ;;
esac
done
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NOW=`$DATE -u +%G%m%d%k%M%S | /usr/bin/tr -d ' '`
if test -n "$userdir"; then
dir="$userdir"
else
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dirbase="lvmdump-$HOSTNAME-$NOW"
dir="$HOME/$dirbase"
fi
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test -e $dir && die 3 "Fatal: $dir already exists"
$MKDIR -p $dir || die 4 "Fatal: could not create $dir"
log="$dir/lvmdump.log"
myecho() {
echo "$@"
echo "$@" >> $log
}
log() {
echo "$@" >> $log
eval "$@"
}
echo " "
myecho "Creating dump directory: $dir"
echo " "
if (( $advanced )); then
myecho "Gathering LVM volume info..."
myecho " vgscan..."
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log "$LVM vgscan -vvvv > $dir/vgscan 2>&1"
myecho " pvscan..."
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log "$LVM pvscan -v >> $dir/pvscan 2>> $log"
myecho " lvs..."
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log "$LVM lvs -a -o +devices >> $dir/lvs 2>> $log"
myecho " pvs..."
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log "$LVM pvs -a -v > $dir/pvs 2>> $log"
echo " vgs..."
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log "$LVM vgs -v > $dir/vgs 2>> $log"
fi
if (( $clustered )); then
myecho "Gathering cluster info..."
{
for i in nodes status services; do
cap_i=$(echo $i|tr a-z A-Z)
printf "$cap_i:\n----------------------------------\n"
log "cman_tool $i 2>> $log"
echo
done
echo "LOCKS:"
echo "----------------------------------"
if [ -f /proc/cluster/dlm_locks ]
then
echo clvmd > /proc/cluster/dlm_locks
cat /proc/cluster/dlm_locks
echo
echo "RESOURCE DIR:"
cat /proc/cluster/dlm_dir
echo
echo "DEBUG LOG:"
cat /proc/cluster/dlm_debug
echo
fi
if [ -f /debug/dlm/clvmd ]
then
cat /debug/dlm/clvmd
echo
echo "WAITERS:"
cat /debug/dlm/clvmd_waiters
echo
echo "MASTER:"
cat /debug/dlm/clvmd_master
fi
} > $dir/cluster_info
fi
myecho "Gathering LVM & device-mapper version info..."
echo "LVM VERSION:" > $dir/versions
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$LVM lvs --version >> $dir/versions 2>> $log
echo "DEVICE MAPPER VERSION:" >> $dir/versions
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$DMSETUP --version >> $dir/versions 2>> $log
echo "KERNEL VERSION:" >> $dir/versions
$UNAME -a >> $dir/versions 2>> $log
echo "DM TARGETS VERSIONS:" >> $dir/versions
$DMSETUP targets >> $dir/versions 2>> $log
myecho "Gathering dmsetup info..."
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log "$DMSETUP info -c > $dir/dmsetup_info 2>> $log"
log "$DMSETUP table > $dir/dmsetup_table 2>> $log"
log "$DMSETUP status > $dir/dmsetup_status 2>> $log"
myecho "Gathering process info..."
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log "$PS alx > $dir/ps_info 2>> $log"
myecho "Gathering console messages..."
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log "$TAIL -n 75 /var/log/messages > $dir/messages 2>> $log"
myecho "Gathering /etc/lvm info..."
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log "$CP -a /etc/lvm $dir/lvm 2>> $log"
myecho "Gathering /dev listing..."
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log "$LS -laR /dev > $dir/dev_listing 2>> $log"
myecho "Gathering /sys/block listing..."
log "$LS -laR /sys/block > $dir/sysblock_listing"
if (( $metadata )); then
myecho "Gathering LVM metadata from Physical Volumes..."
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log "$MKDIR -p $dir/metadata"
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pvs="$($LVM pvs --separator , --noheadings --units s --nosuffix -o \
name,pe_start 2>> $log | $SED -e 's/^ *//')"
for line in "$pvs"
do
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test -z "$line" && continue
pv="$(echo $line | $CUT -d, -f1)"
pe_start="$(echo $line | $CUT -d, -f2)"
name="$($BASENAME $pv)"
myecho " $pv"
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log "$DD if=$pv of=$dir/metadata/$name bs=512 count=$pe_start 2>> $log"
done
fi
if test -z "$userdir"; then
lvm_dump="$dirbase.tgz"
myecho "Creating report tarball in $HOME/$lvm_dump..."
cd $HOME
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$TAR czf $lvm_dump $dirbase 2>/dev/null
$RM -rf $dir
fi
if test "$UID" != "0" && test "$EUID" != "0"; then
myecho
myecho "WARNING! Running as non-privileged user, dump is likely incomplete!"
myecho
fi
exit 0