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bc773e60e1
It would be most useful to add "dmsetup ls --tree" to the commands run. This command helps in answering the question "which devices are actually underneath a given LV?" Although the info is available with other existing dmsetup commands, adding this command gives a much clearer summary of complex setups. Here's an example of an LVM mirror, with mirror images on partitions created on top of multipath devices. The multipath devices are on simple block devices. As you can see, it is easy to see the stacking from the "dmsetup ls --tree" output: vgmpathtest-lvmpathmir (253:14) ├─vgmpathtest-lvmpathmir_mimage_1 (253:13) │ └─mpath5p1 (253:5) │ └─mpath5 (253:2) │ ├─ (8:16) │ └─ (8:0) ├─vgmpathtest-lvmpathmir_mimage_0 (253:12) │ └─mpath6p1 (253:6) │ └─mpath6 (253:3) │ ├─ (8:48) │ └─ (8:32) └─vgmpathtest-lvmpathmir_mlog (253:11) └─mpath7 (253:4) ├─ (8:80) └─ (8:64) VolGroup00-LogVol01 (253:1) └─ (202:2) vgtest-lvmir (253:10) ├─vgtest-lvmir_mimage_1 (253:9) │ └─ (7:1) ├─vgtest-lvmir_mimage_0 (253:8) │ └─ (7:0) └─vgtest-lvmir_mlog (253:7) └─ (7:3) VolGroup00-LogVol00 (253:0) └─ (202:2) But it is much harder to see the stacking with only the commands today ("dmsetup info", "dmsetup status", and "dmsetup table"). We could piece together the stacking from "dmsetup table" but it requires further processing (take output from "dmsetup info to get map name to major/minor, then parse "dmsetup table", etc).
237 lines
5.8 KiB
Bash
Executable File
237 lines
5.8 KiB
Bash
Executable File
#!/bin/bash
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# We use some bash-isms (getopts?)
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# Copyright (C) 2007-2010 Red Hat, Inc. All rights reserved.
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#
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# This file is part of LVM2.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions
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# of the GNU General Public License v.2.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# lvm_dump: This script is used to collect pertinent information for
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# the debugging of lvm issues.
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# following external commands are used throughout the script
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# echo and test are internal in bash at least
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MKDIR=mkdir # need -p
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TAR=tar # need czf
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RM=rm # need -rf
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CP=cp
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TAIL=tail # we need -n
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LS=ls # need -la
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PS=ps # need alx
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SED=sed
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DD=dd
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CUT=cut
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DATE=date
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BASENAME=basename
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UNAME=uname
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# user may override lvm and dmsetup location by setting LVM_BINARY
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# and DMSETUP_BINARY respectively
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LVM=${LVM_BINARY-lvm}
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DMSETUP=${DMSETUP_BINARY-dmsetup}
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die() {
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code=$1; shift
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echo "$@" 1>&2
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exit $code
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}
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"$LVM" version >& /dev/null || die 2 "Could not run lvm binary '$LVM'"
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"$DMSETUP" version >& /dev/null || DMSETUP=:
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function usage {
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echo "$0 [options]"
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echo " -h print this message"
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echo " -a advanced collection - warning: if lvm is already hung,"
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echo " then this script may hang as well if -a is used"
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echo " -m gather LVM metadata from the PVs"
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echo " -d <directory> dump into a directory instead of tarball"
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echo " -c if running clvmd, gather cluster data as well"
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echo ""
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exit 1
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}
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advanced=0
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clustered=0
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metadata=0
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while getopts :acd:hm opt; do
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case $opt in
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s) sysreport=1 ;;
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a) advanced=1 ;;
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c) clustered=1 ;;
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d) userdir=$OPTARG ;;
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h) usage ;;
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m) metadata=1 ;;
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:) echo "$0: $OPTARG requires a value:"; usage ;;
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\?) echo "$0: unknown option $OPTARG"; usage ;;
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*) usage ;;
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esac
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done
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NOW=`$DATE -u +%G%m%d%k%M%S | /usr/bin/tr -d ' '`
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if test -n "$userdir"; then
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dir="$userdir"
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else
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dirbase="lvmdump-$HOSTNAME-$NOW"
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dir="$HOME/$dirbase"
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fi
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test -e $dir && die 3 "Fatal: $dir already exists"
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$MKDIR -p $dir || die 4 "Fatal: could not create $dir"
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log="$dir/lvmdump.log"
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myecho() {
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echo "$@"
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echo "$@" >> "$log"
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}
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log() {
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echo "$@" >> "$log"
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eval "$@"
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}
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warnings() {
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if test "$UID" != "0" && test "$EUID" != "0"; then
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myecho "WARNING! Running as non-privileged user, dump is likely incomplete!"
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elif test "$DMSETUP" = ":"; then
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myecho "WARNING! Could not run dmsetup, dump is likely incomplete."
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fi
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}
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warnings
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myecho "Creating dump directory: $dir"
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echo " "
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if (( $advanced )); then
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myecho "Gathering LVM volume info..."
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myecho " vgscan..."
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log "\"$LVM\" vgscan -vvvv > \"$dir/vgscan\" 2>&1"
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myecho " pvscan..."
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log "\"$LVM\" pvscan -v >> \"$dir/pvscan\" 2>> \"$log\""
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myecho " lvs..."
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log "\"$LVM\" lvs -a -o +devices >> \"$dir/lvs\" 2>> \"$log\""
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myecho " pvs..."
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log "\"$LVM\" pvs -a -v > \"$dir/pvs\" 2>> \"$log\""
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myecho " vgs..."
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log "\"$LVM\" vgs -v > \"$dir/vgs\" 2>> \"$log\""
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fi
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if (( $clustered )); then
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myecho "Gathering cluster info..."
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{
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for i in nodes status services; do
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cap_i=$(echo $i|tr a-z A-Z)
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printf "$cap_i:\n----------------------------------\n"
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log "cman_tool $i 2>> \"$log\""
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echo
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done
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echo "LOCKS:"
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echo "----------------------------------"
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if [ -f /proc/cluster/dlm_locks ]
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then
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echo clvmd > /proc/cluster/dlm_locks
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cat /proc/cluster/dlm_locks
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echo
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echo "RESOURCE DIR:"
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cat /proc/cluster/dlm_dir
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echo
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echo "DEBUG LOG:"
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cat /proc/cluster/dlm_debug
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echo
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fi
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if [ -f /debug/dlm/clvmd ]
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then
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cat /debug/dlm/clvmd
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echo
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echo "WAITERS:"
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cat /debug/dlm/clvmd_waiters
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echo
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echo "MASTER:"
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cat /debug/dlm/clvmd_master
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fi
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} > $dir/cluster_info
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fi
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myecho "Gathering LVM & device-mapper version info..."
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echo "LVM VERSION:" > "$dir/versions"
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"$LVM" lvs --version >> "$dir/versions" 2>> "$log"
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echo "DEVICE MAPPER VERSION:" >> "$dir/versions"
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"$DMSETUP" --version >> "$dir/versions" 2>> "$log"
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echo "KERNEL VERSION:" >> "$dir/versions"
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"$UNAME" -a >> "$dir/versions" 2>> "$log"
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echo "DM TARGETS VERSIONS:" >> "$dir/versions"
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"$DMSETUP" targets >> "$dir/versions" 2>> "$log"
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myecho "Gathering dmsetup info..."
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log "\"$DMSETUP\" info -c > \"$dir/dmsetup_info\" 2>> \"$log\""
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log "\"$DMSETUP\" table > \"$dir/dmsetup_table\" 2>> \"$log\""
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log "\"$DMSETUP\" status > \"$dir/dmsetup_status\" 2>> \"$log\""
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log "\"$DMSETUP\" ls --tree > \"$dir/dmsetup_ls_tree\" 2>> \"$log\""
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myecho "Gathering process info..."
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log "$PS alx > \"$dir/ps_info\" 2>> \"$log\""
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myecho "Gathering console messages..."
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log "$TAIL -n 75 /var/log/messages > \"$dir/messages\" 2>> \"$log\""
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myecho "Gathering /etc/lvm info..."
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log "$CP -a /etc/lvm \"$dir/lvm\" 2>> \"$log\""
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myecho "Gathering /dev listing..."
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log "$LS -laR /dev > \"$dir/dev_listing\" 2>> \"$log\""
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myecho "Gathering /sys/block listing..."
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log "$LS -laR /sys/block > \"$dir/sysblock_listing\" 2>> \"$log\""
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log "$LS -laR /sys/devices/virtual/block >> \"$dir/sysblock_listing\" 2>> \"$log\""
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if (( $metadata )); then
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myecho "Gathering LVM metadata from Physical Volumes..."
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log "$MKDIR -p \"$dir/metadata\""
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pvs="$("$LVM" pvs --separator , --noheadings --units s --nosuffix -o \
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name,pe_start 2>> "$log" | $SED -e 's/^ *//')"
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for line in $pvs
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do
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test -z "$line" && continue
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pv="$(echo $line | $CUT -d, -f1)"
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pe_start="$(echo $line | $CUT -d, -f2)"
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name="$($BASENAME "$pv")"
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myecho " $pv"
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log "$DD if=$pv \"of=$dir/metadata/$name\" bs=512 count=$pe_start 2>> \"$log\""
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done
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fi
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if test -z "$userdir"; then
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lvm_dump="$dirbase.tgz"
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myecho "Creating report tarball in $HOME/$lvm_dump..."
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fi
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warnings
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if test -z "$userdir"; then
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cd "$HOME"
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"$TAR" czf "$lvm_dump" "$dirbase" 2>/dev/null
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"$RM" -rf "$dir"
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fi
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exit 0
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