source: branches/3.2/mindi/analyze-my-lvm @ 3432

Last change on this file since 3432 was 3432, checked in by bruno, 4 years ago
  • Change analyze-my-lvm in order to generate percentage of Extents of a VG to use to create the LV instead of a fixed size. Should improve bugs when creating LVM on a disk of different size greatly.
  • Property svn:keywords set to Id
File size: 11.9 KB
Line 
1#!/bin/bash
2#
3# $Id: analyze-my-lvm 3432 2015-08-28 00:34:47Z bruno $
4#
5
6Die() {
7    echo "$1" >> /dev/stderr
8    exit -1
9}
10
11
12
13GetValueFromField() {
14    local res
15    grep -i "$2" "$1" | perl -p -e 's/\s*(.*)\s\s\s+(.+)$/$2/;s/\sT[i]*B/t/;s/\sG[i]*B/g/;s/\sM[i]*B/m/;s/\sK[i]*B/k/'
16}
17
18
19GetLastBit() {
20    local i res
21    i=20
22    res=""
23    while [ ! "$res" ] ; do
24        i=$(($i-1))
25        res=`echo "$1" | cut -d'/' -f$i`
26    done
27    echo "$res"
28}
29
30
31ProcessLogicalVolume() {
32    local LV_full_string fname logical_volume volume_group device
33    LV_full_string=$1
34    if [ ! -e "$1" ]; then
35        echo "WARNING - cannot find LV file $1" | tee -a /dev/stderr
36        return
37    fi
38    volume_group=`echo "$LV_full_string" | cut -d'/' -f3`
39    logical_volume=`echo "$LV_full_string" | cut -d'/' -f4`
40    if [ $lvmversion = 2 ]; then
41        device=$LV_full_string
42        params=`GenerateLvcreateParameters $device`
43    else
44        fname=/proc/lvm/VGs/$volume_group/LVs/$logical_volume
45        if [ ! -e "$fname" ] ; then
46            echo "WARNING - cannot find $volume_group's $logical_volume LV file" | tee -a /dev/stderr
47            return
48        else
49            device=`GetValueFromField $fname "name:"`
50            params=`GenerateLvcreateParameters $device`
51        fi
52    fi
53
54    # Exclude LVs member of that env var
55    if [ "$MINDI_EXCLUDE_DEVS" ] ; then
56        list_of_devices="`mindi --nolog --readalllink $LV_full_string 2> /dev/null`"
57        l=""
58        for d in $list_of_devices; do
59            l="$l `GiveMapperOfdm $d`"
60        done
61        list_of_devices="`echo $l | sort -u`"
62        for ed in `echo $MINDI_EXCLUDE_DEVS | sed 's/|/ /g'`; do
63            if  [ "`echo " $list_of_devices" | grep " $ed"`" != "" ]; then
64                echo "Not including device $LV_full_string as it was excluded"
65                return
66            fi
67        done
68    fi
69    # Do not process LV whose VG are excluded
70    if [ -f $MINDI_TMP/excludedvgs ]; then
71        if [ "`grep -x $volume_group $MINDI_TMP/excludedvgs`" != "" ]; then
72            echo "Not including LV $logical_volume as VG $volume_group was excluded"
73            return
74        fi
75    fi
76
77    echo "# echo y | $LVMCMD lvcreate$params -n $logical_volume $volume_group"
78}
79
80
81GenerateLvcreateParameters() {
82    local device stripes stripesize device fname allocation output readahead
83    fname=$MINDI_TMP/PLF.$$.txt
84    fname2=$MINDI_TMP/PLF2.$$.txt
85    device=$1
86    output=""
87    $LVMCMD lvdisplay $device | cat > $fname
88    stripes=`GetValueFromField $fname "Stripes"`
89    stripesize=`GetValueFromField $fname "Stripe size (MByte)"`m
90    [ "$stripesize" = "m" ] && stripesize=`GetValueFromField $fname "Stripe size (KByte)"`k
91    [ "$stripesize" = "k" ] && stripesize=""
92    currentLE=`GetValueFromField $fname "Current LE"`
93    vgname=`GetValueFromField $fname "VG Name"`
94    $LVMCMD vgdisplay $vgname | cat > $fname2
95    totalLE=`GetValueFromField $fname2 "Total PE"`
96    allocation=`perl -e '$per='$currentLE'*100/'$totalLE' ; print int($per+0.5)."%VG";'`
97    readahead=`GetValueFromField $fname "Read ahead sectors"`
98    rm -f $fname $fname2
99    [ "$stripes" ]    && output="$output -i $stripes"
100    [ "$stripesize" ] && output="$output -I $stripesize"
101    [ "$allocation" ] && output="$output -l $allocation"
102    [ "$readahead" ]  && output="$output -r $readahead"
103    echo "$output"
104}
105
106
107
108GenerateVgcreateParameters() {
109    local current_VG device fname incoming VG_info_file max_logical_volumes max_physical_volumes physical_extent_size output blanklines
110    current_VG=$1
111    VG_info_file=$MINDI_TMP/$$.vg-info.txt
112    # We use cat here as a way to avoid SElinux to prevent us from writing in $VG_info_file
113    $LVMCMD vgdisplay $current_VG | cat > $VG_info_file
114    max_logical_volumes=`GetValueFromField "$VG_info_file" "MAX LV"`
115    [ $max_logical_volumes -ge 256 ] && max_logical_volumes=255
116    max_physical_volumes=`GetValueFromField "$VG_info_file" "MAX PV"`
117    [ $max_physical_volumes -ge 256 ] && max_physical_volumes=255
118    physical_extent_size=`GetValueFromField "$VG_info_file" "PE Size"`
119    output=""
120    [ "$max_logical_volumes" ]  && output="$output -l $max_logical_volumes"
121    [ "$max_physical_volumes" ] && output="$output -p $max_physical_volumes"
122    [ "$physical_extent_size" ] && output="$output -s $physical_extent_size"
123    echo "$output"
124    rm -f $VG_info_file
125}
126
127
128
129ProcessVolumeGroup() {
130    local current_VG physical_volumes i list_of_devices VG_params
131    current_VG=$1
132    if [ $lvmversion = 2 ]; then
133        VG_params=`GenerateVgcreateParameters $current_VG`
134        current_PVs=`$LVMCMD pvscan | grep " $current_VG " | awk '{print $2}' | tr '\n' ' '`
135        list_of_devices=$current_PVs
136    else
137        info_file=/proc/lvm/VGs/$current_VG/group
138        physical_volumes=`ls /proc/lvm/VGs/$current_VG/PVs`
139        VG_params=`GenerateVgcreateParameters $current_VG`
140        list_of_devices=""
141        for i in $physical_volumes ; do
142            fname=/proc/lvm/VGs/$current_VG/PVs/$i
143            device=`GetValueFromField $fname "name:"`
144            list_of_devices="$list_of_devices $device"
145        done
146        current_PVs=$list_of_devices
147    fi
148    l=""
149    if [ -f /etc/multipath.conf ]; then
150        # If multipath check which type of devide are given, mpath prefered
151        for d in $list_of_devices; do
152            l="$l `mindi --nolog --readalllink $d 2> /dev/null`"
153            l="$l `GiveMapperOfdm $d`"
154        done
155        list_of_devices="`echo $l | sort -u`"
156    fi
157
158    if [ "$MINDI_EXCLUDE_DEVS" ] ; then
159        for ed in `echo $MINDI_EXCLUDE_DEVS | sed 's/|/ /g'`; do
160            if  [ "`echo " $list_of_devices" | grep " $ed"`" != "" ]; then
161                echo $current_VG >> $MINDI_TMP/excludedvgs
162                return
163            fi
164        done
165    fi
166    echo "# $LVMCMD vgcreate $current_VG$VG_params $current_PVs"
167    echo "# $LVMCMD vgchange -a y $current_VG"
168}
169
170
171
172ListAllPhysicalVolumes() {
173    if [ $lvmversion = 2 ]; then
174        $LVMCMD pvscan 2> /dev/null | grep 'PV' | grep -v unknown | awk '{print $2}' >  $MINDI_TMP/pv.tmp
175    else
176        pvscan 2> /dev/null | grep '"' | cut -d'"' -f2  >  $MINDI_TMP/pv.tmp
177    fi
178
179    rm -f $MINDI_TMP/pv.tmp2
180    for d in `cat $MINDI_TMP/pv.tmp`; do
181        # Skip devices excluded, coming from mondoarchive
182        skip=0
183        l=""
184        l="$l `mindi --nolog --readalllink $d 2> /dev/null`"
185        l="$l `GiveMapperOfdm $d`"
186        list_of_devices="`echo $l | sort -u`"
187        if [ "$MINDI_EXCLUDE_DEVS" ] ; then
188            for ed in `echo $MINDI_EXCLUDE_DEVS | sed 's/|/ /g'`; do
189                if  [ "`echo " $list_of_devices " | grep " $ed"`" != "" ]; then
190                    skip=1
191                    continue
192                fi
193            done
194        fi
195        if [ $skip -eq 1 ]; then
196            continue
197        fi
198        echo $d >> $MINDI_TMP/pv.tmp2
199    done
200
201    if [ -f /etc/multipath.conf ]; then
202        # If multipath check which type of devide are given, mpath prefered
203        if [ -f  $MINDI_TMP/pv.tmp2 ]; then
204            l=""
205            for d in `cat $MINDI_TMP/pv.tmp2`; do
206                skip=0
207                l="$l `mindi --nolog --readalllink $d 2> /dev/null`"
208                l="$l `GiveMapperOfdm $d`"
209                list_of_devices="`echo $l | sort -u`"
210                if [ "$MINDI_EXCLUDE_DEVS" ] ; then
211                    for ed in `echo $MINDI_EXCLUDE_DEVS | sed 's/|/ /g'`; do
212                        if  [ "`echo " $list_of_devices " | grep " $ed"`" != "" ]; then
213                            skip=1
214                            continue
215                        fi
216                    done
217                fi
218                if [ $skip -eq 1 ]; then
219                    continue
220                fi
221                GiveMapperOfdm $d
222            done
223        fi
224    else
225        if [ -f  $MINDI_TMP/pv.tmp2 ]; then
226            cat $MINDI_TMP/pv.tmp2
227        fi
228    fi
229    rm -f $MINDI_TMP/pv.tmp $MINDI_TMP/pv.tmp2
230}
231
232
233ListAllVolumeGroups() {
234    $LVMCMD vgdisplay 2> /dev/null | awk '/^ *VG Name/ {print $3;}'
235}
236
237GiveMapperOfdm () {
238
239major=`stat -L -c "%t" $1 2> /dev/null`
240minor=`stat -L -c "%T" $1 2> /dev/null`
241
242for i in `ls /dev/mapper/*`; do
243    mj=`stat -L -c "%t" $i`
244    mn=`stat -L -c "%T" $i`
245    if [ "$mj" = "$major" ] && [ "$mn" = "$minor" ]; then
246        echo "$i"
247        return
248    fi
249done
250echo $1
251}
252
253GiveVGLVOfdm () {
254
255major=`stat -L -c "%t" $1 2> /dev/null`
256minor=`stat -L -c "%T" $1 2> /dev/null`
257
258for v in `vgs --noheadings | awk '{print $1}'`; do
259    for i in `ls /dev/$v/*`; do
260        mj=`stat -L -c "%t" $i`
261        mn=`stat -L -c "%T" $i`
262        if [ "$mj" = "$major" ] && [ "$mn" = "$minor" ]; then
263            echo "$i"
264            return
265        fi
266    done
267done
268echo $1
269}
270
271
272ListLvmDrivesAndPartitions() {
273    # We get partitions in this loop not devices
274    for d in `$LVMCMD vgdisplay -v 2> /dev/null | grep "PV Name" | sed 's/(#)//' | awk '{print $3}'`; do 
275        # If multipath check which type of devices are given, mpath prefered
276        if [ -f /etc/multipath.conf ]; then
277            i=`GiveMapperOfdm $d`
278            rep=$i
279        else
280            rep=$d
281        fi
282        skip=0
283        if [ "$MINDI_EXCLUDE_DEVS" ] ; then
284            for ed in `echo $MINDI_EXCLUDE_DEVS | sed 's/|/ /g'`; do
285                if  [ "`echo " $rep " | grep " $ed"`" != "" ]; then
286                    skip=1
287                    continue
288                fi
289            done
290        fi
291        if [ $skip -eq 1 ]; then
292            continue
293        fi
294        echo $rep
295    done
296}
297
298
299
300PrettifyList() {
301    local i
302    echo -en "$1"
303    for i in $2 ; do
304        echo -en "$i "
305    done
306    echo ""
307}
308
309ListAllLogicalVolumesSortedBydm() {
310    rm -f $MINDI_TMP/sorteddm
311    for d in `ListAllLogicalVolumes` ; do
312        dm=`mindi --nolog --readalllink $d 2> /dev/null | tail -1`
313        echo "$dm|$d" >> $MINDI_TMP/sorteddm
314    done
315    if [ -f $MINDI_TMP/sorteddm ]; then
316        cut -d'-' -f2- $MINDI_TMP/sorteddm | sort -t'|' -n | cut -d'|' -f2
317    fi
318}
319
320ListAllLogicalVolumes() {
321    if [ $lvmversion = 2 ]; then
322        $LVMCMD lvscan 2> /dev/null | grep "'" | grep -iw "ACTIVE" | cut -d"'" -f2
323    else
324        lvscan 2> /dev/null | grep '"' | grep -iw "ACTIVE" | cut -d'"' -f2
325    fi
326}
327
328
329
330WriteShutdownScript() {
331    local i
332    echo ""
333    echo "Finally, to shut down and delete the volumes, do this:-"
334    for i in `ListAllLogicalVolumes` ; do
335        echo "($LVMCMD lvremove -f $i)"
336    done
337    for i in `ListAllVolumeGroups` ; do
338        echo "($LVMCMD vgchange -a n $i)"
339    done
340    for i in `ListAllVolumeGroups` ; do
341        echo "($LVMCMD vgremove $i)"
342    done
343    if [ $lvmversion = 2 ]; then
344        echo "(rmmod dm-mod & rmmod dm_mod & )"
345    else
346        echo "(rmmod lvm-mod)"
347    fi
348}
349
350
351
352# -------------------------------- main -----------------------------------
353
354# These exports are needed to avoid bad formating of display commands (, instead of . for separator e.g.)
355# Fix #654
356export LANG=C
357export LANGUAGE=C
358
359if [ "$1" = "--givemapperofdm" ] ; then
360    shift
361    if [ _"$1" != _"" ] ; then
362        GiveMapperOfdm $1
363    fi
364    exit 0
365fi
366
367if [ "$1" = "--givevglvofdm" ] ; then
368    shift
369    if [ _"$1" != _"" ] ; then
370        GiveVGLVOfdm $1
371    fi
372    exit 0
373fi
374
375
376which lvmdiskscan 2>/dev/null 2>&1 || Die "lvmdiskscan not found. Won't handle LVM."
377if [ -e "/proc/lvm/global" ] && [ "`tr -s '\t' ' ' < /proc/lvm/global | grep "0 VGs 0 PVs 0 LVs"`" != "" ]; then
378    exit 1
379fi
380
381if [ _"$MINDI_TMP" = _"" ]; then
382    # Launched stdalone, so create a temp dir
383    STDALONE="true"
384    MINDI_TMP=`mktemp -d $TMPDIR/mindi.XXXXXXXXXX`
385    if [ $? -ne 0 ]; then
386        df $TMPDIR
387        Die "Unable to create a temporary directory ! Check space on $TMPDIR"
388    fi
389    if [ _"$MINDI_TMP" = _"" ]; then
390        Die "MINDI_TMP is empty, aborting"
391    fi
392    if [ _"$MINDI_TMP" = _"/" ]; then
393        Die "MINDI_TMP is /, aborting"
394    fi
395fi
396
397# Older lvmdiskscan use --help, newer --version
398lvmopt="--help"
399lvmdiskscan $lvmopt 2>&1 | grep -q -- "--version"
400if [ $? -eq 0 ]; then
401    lvmopt="--version"
402fi
403
404
405lvmversion=`lvmdiskscan --help 2>&1 |
406  grep -E "Logical Volume Manager|LVM version:" |
407  cut -d: -f2 | cut -d. -f1 |
408  awk '{print $NF}' |
409  sed -e 's/ //g'`
410
411if which lvm 2>/dev/null; then
412    version=`lvm version | grep "LVM version" | awk '{print $3}'`
413    i="`echo "$version" | cut -d'.' -f1`"
414    echo "i=$i"
415    if [ "$i" -ge "2" ] ; then
416        lvmversion=2
417    fi
418fi
419
420if [ $lvmversion = 2 ]; then
421    echo "LVM version >= 2.0 found."
422    LVMCMD="lvm"
423else
424    LVMCMD=""
425fi
426
427rm -f $MINDI_TMP/excludedvgs
428all_lvm_drives_and_partitions=`ListLvmDrivesAndPartitions`
429echo "Just before you extrapolate mountlist to include RAID partitions,"
430echo "extrapolate it to include the following LVM drives and partitions:-"
431PrettifyList ">>>>> " "$all_lvm_drives_and_partitions"
432echo "To get started, type:-"
433if [ $lvmversion = 2 ]; then
434    echo "(insmod dm-mod)"
435    echo "(insmod dm_mod)"
436else
437    echo "(insmod lvm-mod)"
438fi
439echo "# $LVMCMD vgchange -an"
440for i in `ListAllPhysicalVolumes` ; do
441    echo "# echo y | $LVMCMD pvcreate -ff $i"
442done
443echo "# $LVMCMD vgscan"
444echo ""
445echo "Create and activate the VG's (volume groups)."
446all_volume_groups=`ListAllVolumeGroups`
447for current_VG in $all_volume_groups ; do
448    if [ $lvmversion -ne 2 ]; then
449        echo "# rm -Rf /dev/$current_VG"
450    fi
451    ProcessVolumeGroup $current_VG
452done
453echo ""
454echo "Finally, create the LV's (logical volumes)."
455all_logical_volumes=`ListAllLogicalVolumesSortedBydm`
456for current_LV in $all_logical_volumes ; do
457    ProcessLogicalVolume $current_LV
458done
459echo ""
460echo "# $LVMCMD vgscan"
461echo "Now you may format the LV's:-"
462for i in `ListAllLogicalVolumes` ; do
463    echo "(mkfs -t foo $i or something like that)"
464done
465rm -f $MINDI_TMP/excludedvgs
466WriteShutdownScript
467if [ _"$STDALONE" = _"true" ]; then
468    rm -rf $MINDI_TMP
469fi
470exit 0
471
472
473
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