source: branches/3.0/mindi/analyze-my-lvm @ 3016

Last change on this file since 3016 was 3016, checked in by Bruno Cornec, 8 years ago
  • Substitue a complex awk expression by a more simpler perl one in analyze-my-lvm
  • Fix a bug on RHEL 5 where lvdisplay doesn't support redirection. Adds a | cat in between, as was done for vgdisplay
  • Property svn:keywords set to Id
File size: 11.3 KB
Line 
1#!/bin/bash
2#
3# $Id: analyze-my-lvm 3016 2012-06-02 23:52:28Z bruno $
4#
5
6Die() {
7    echo "$1" >> /dev/stderr
8    exit -1
9}
10
11
12
13GetValueFromField() {
14    local res
15    grep -i "$2" "$1" | perl -pi -e 's/\s*(.*)\s\s\s+(.+)$/$2/;s/\sT[i]*B/t/;s/\sG[i]*B/g/;s/\sM[i]*B/m/;s/\sK[i]*B/k/'
16}
17
18
19GetLastBit() {
20    local i res
21    i=20
22    res=""
23    while [ ! "$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 "# $LVMCMD lvcreate$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.$$.txt
84    device=$1
85    output=""
86    $LVMCMD lvdisplay $device | cat > $fname
87    stripes=`GetValueFromField $fname "Stripes"`
88    stripesize=`GetValueFromField $fname "Stripe size (MByte)"`m
89    [ "$stripesize" = "m" ] && stripesize=`GetValueFromField $fname "Stripe size (KByte)"`k
90    [ "$stripesize" = "k" ] && stripesize=""
91    allocation=`GetValueFromField $fname "LV Size"`
92    [ ! "`echo "$allocation" | grep "[k,m,g,t]"`" ] && allocation="$allocation"m
93    if echo "$allocation" | grep -E '^.*g$' > /dev/null 2> /dev/null ; then
94        val=`echo "$allocation" | sed s/g//`
95        allocation=`echo "$val" | awk '{c=$1; printf "%d", c*1024;}'`m
96    fi
97    readahead=`GetValueFromField $fname "Read ahead sectors"`
98    rm -f $fname
99    [ "$stripes" ]    && output="$output -i $stripes"
100    [ "$stripesize" ] && output="$output -I $stripesize"
101    [ "$allocation" ] && output="$output -L $allocation"
102    [ "$readahead" ]  && output="$output -r $readahead"
103    echo "$output"
104}
105
106
107
108GenerateVgcreateParameters() {
109    local current_VG device fname incoming VG_info_file max_logical_volumes max_physical_volumes physical_extent_size output blanklines
110    current_VG=$1
111    VG_info_file=$MINDI_TMP/$$.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 $1
251}
252
253
254ListLvmDrivesAndPartitions() {
255    # We get partitions in this loop not devices
256    for d in `$LVMCMD vgdisplay -v 2> /dev/null | grep "PV Name" | sed 's/(#)//' | awk '{print $3}'`; do 
257        # If multipath check which type of devices are given, mpath prefered
258        if [ -f /etc/multipath.conf ]; then
259            i=`GiveMapperOfdm $d`
260            rep=$i
261        else
262            rep=$d
263        fi
264        skip=0
265        if [ "$MINDI_EXCLUDE_DEVS" ] ; then
266            for ed in `echo $MINDI_EXCLUDE_DEVS | sed 's/|/ /g'`; do
267                if  [ "`echo " $rep " | grep " $ed"`" != "" ]; then
268                    skip=1
269                    continue
270                fi
271            done
272        fi
273        if [ $skip -eq 1 ]; then
274            continue
275        fi
276        echo $rep
277    done
278}
279
280
281
282PrettifyList() {
283    local i
284    echo -en "$1"
285    for i in $2 ; do
286        echo -en "$i "
287    done
288    echo ""
289}
290
291ListAllLogicalVolumesSortedBydm() {
292                rm -f $MINDI_TMP/sorteddm
293        for d in `ListAllLogicalVolumes` ; do
294            dm=`mindi --nolog --readalllink $d 2> /dev/null | tail -1`
295            echo "$dm|$d" >> $MINDI_TMP/sorteddm
296        done
297        if [ -f $MINDI_TMP/sorteddm ]; then
298            sort -t'|' $MINDI_TMP/sorteddm | cut -d'|' -f2
299        fi
300}
301
302ListAllLogicalVolumes() {
303    if [ $lvmversion = 2 ]; then
304        $LVMCMD lvscan 2> /dev/null | grep "'" | grep -iw "ACTIVE" | cut -d"'" -f2
305    else
306        lvscan 2> /dev/null | grep '"' | grep -iw "ACTIVE" | cut -d'"' -f2
307    fi
308}
309
310
311
312WriteShutdownScript() {
313    local i
314    echo ""
315    echo "Finally, to shut down and delete the volumes, do this:-"
316    for i in `ListAllLogicalVolumes` ; do
317        echo "($LVMCMD lvremove -f $i)"
318    done
319    for i in `ListAllVolumeGroups` ; do
320        echo "($LVMCMD vgchange -a n $i)"
321    done
322    for i in `ListAllVolumeGroups` ; do
323        echo "($LVMCMD vgremove $i)"
324    done
325    if [ $lvmversion = 2 ]; then
326        echo "(rmmod dm-mod & rmmod dm_mod & )"
327    else
328        echo "(rmmod lvm-mod)"
329    fi
330}
331
332
333
334# -------------------------------- main -----------------------------------
335
336if [ "$1" = "--givemapperofdm" ] ; then
337    shift
338    if [ _"$1" != _"" ] ; then
339        GiveMapperOfdm $1
340    fi
341    exit 0
342fi
343
344
345which lvmdiskscan 2>/dev/null 2>&1 || Die "lvmdiskscan not found. Won't handle LVM."
346if [ -e "/proc/lvm/global" ] && [ "`tr -s '\t' ' ' < /proc/lvm/global | grep "0 VGs 0 PVs 0 LVs"`" != "" ]; then
347    exit 1
348fi
349
350if [ _"$MINDI_TMP" = _"" ]; then
351    # Launched stdalone, so create a temp dir
352    STDALONE="true"
353    MINDI_TMP=`mktemp -d $TMPDIR/mindi.XXXXXXXXXX`
354    if [ $? -ne 0 ]; then
355        df $TMPDIR
356        Die "Unable to create a temporary directory ! Check space on $TMPDIR"
357    fi
358    if [ _"$MINDI_TMP" = _"" ]; then
359        Die "MINDI_TMP is empty, aborting"
360    fi
361    if [ _"$MINDI_TMP" = _"/" ]; then
362        Die "MINDI_TMP is /, aborting"
363    fi
364fi
365
366# Older lvmdiskscan use --help, newer --version
367lvmopt="--help"
368lvmdiskscan $lvmopt 2>&1 | grep -q -- "--version"
369if [ $? -eq 0 ]; then
370    lvmopt="--version"
371fi
372
373
374lvmversion=`lvmdiskscan --help 2>&1 |
375  grep -E "Logical Volume Manager|LVM version:" |
376  cut -d: -f2 | cut -d. -f1 |
377  awk '{print $NF}' |
378  sed -e 's/ //g'`
379
380if which lvm 2>/dev/null; then
381    version=`lvm version | grep "LVM version" | awk '{print $3}'`
382    i="`echo "$version" | cut -d'.' -f1`"
383    echo "i=$i"
384    if [ "$i" -ge "2" ] ; then
385        lvmversion=2
386    fi
387fi
388
389if [ $lvmversion = 2 ]; then
390    echo "LVM version >= 2.0 found."
391    LVMCMD="lvm"
392else
393    LVMCMD=""
394fi
395
396rm -f $MINDI_TMP/excludedvgs
397all_lvm_drives_and_partitions=`ListLvmDrivesAndPartitions`
398echo "Just before you extrapolate mountlist to include RAID partitions,"
399echo "extrapolate it to include the following LVM drives and partitions:-"
400PrettifyList ">>>>> " "$all_lvm_drives_and_partitions"
401echo "To get started, type:-"
402if [ $lvmversion = 2 ]; then
403    echo "(insmod dm-mod)"
404    echo "(insmod dm_mod)"
405else
406    echo "(insmod lvm-mod)"
407fi
408echo "# $LVMCMD vgchange -an"
409for i in `ListAllPhysicalVolumes` ; do
410    echo "# echo y | $LVMCMD pvcreate -ff $i"
411done
412echo "# $LVMCMD vgscan"
413echo ""
414echo "Create and activate the VG's (volume groups)."
415all_volume_groups=`ListAllVolumeGroups`
416for current_VG in $all_volume_groups ; do
417    if [ $lvmversion -ne 2 ]; then
418        echo "# rm -Rf /dev/$current_VG"
419    fi
420    ProcessVolumeGroup $current_VG
421done
422echo ""
423echo "Finally, create the LV's (logical volumes)."
424all_logical_volumes=`ListAllLogicalVolumesSortedBydm`
425for current_LV in $all_logical_volumes ; do
426    ProcessLogicalVolume $current_LV
427done
428echo ""
429echo "# $LVMCMD vgscan"
430echo "Now you may format the LV's:-"
431for i in `ListAllLogicalVolumes` ; do
432    echo "(mkfs -t foo $i or something like that)"
433done
434rm -f $MINDI_TMP/excludedvgs
435WriteShutdownScript
436if [ _"$STDALONE" = _"true" ]; then
437    rm -rf $MINDI_TMP
438fi
439exit 0
440
441
442
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