source: branches/2.2.9/mindi/analyze-my-lvm @ 2174

Last change on this file since 2174 was 2170, checked in by Bruno Cornec, 11 years ago
  • Fix version syntax for new lvmdiskscan commands by calling --version instead of --help
  • Property svn:keywords set to Id
File size: 7.9 KB
Line 
1#!/bin/bash
2#
3# $Id: analyze-my-lvm 2170 2009-03-25 00:37:44Z bruno $
4#
5
6Die() {
7    echo "$1" >> /dev/stderr
8    exit -1
9}
10
11
12
13GetValueFromField() {
14    local res
15    sed s/'    '/~/ "$1" | tr -s ' ' ' ' | sed s/'~ '/'~'/ | grep -i "$2~" | cut -d'~' -f2,3,4,5 | tr '~' ' ' | gawk '{ if ($2=="MB") {printf "%dm",$1;} else if ($2=="KB") {printf "%dk",$1;} else if ($2=="GB") {printf "%fg",$1;} else {print $0;};}'
16}
17
18
19GetLastBit() {
20    local i res
21    i=20
22    res=""
23    while [ ! "$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    [ ! -e "$1" ] && Die "Cannot find LV file $1"
35    volume_group=`echo "$LV_full_string" | cut -d'/' -f3`
36    logical_volume=`echo "$LV_full_string" | cut -d'/' -f4`
37    if [ $lvmversion = 2 ]; then
38        device=$LV_full_string
39        params=`GenerateLvcreateParameters $device`
40    else
41        fname=/proc/lvm/VGs/$volume_group/LVs/$logical_volume
42        if [ ! -e "$fname" ] ; then
43            echo "Warning - cannot find $volume_group's $logical_volume LV file"
44        else
45            device=`GetValueFromField $fname "name:"`
46            params=`GenerateLvcreateParameters $device`
47        fi
48    fi
49    echo "# $LVMCMD lvcreate$params -n $logical_volume $volume_group"
50}
51
52
53GenerateLvcreateParameters() {
54    local device stripes stripesize device fname allocation output readahead
55    fname=$MINDI_TMP/PLF.$$.txt
56    device=$1
57    output=""
58    $LVMCMD lvdisplay $device > $fname
59    stripes=`GetValueFromField $fname "Stripes"`
60    stripesize=`GetValueFromField $fname "Stripe size (MByte)"`m
61    [ "$stripesize" = "m" ] && stripesize=`GetValueFromField $fname "Stripe size (KByte)"`k
62    [ "$stripesize" = "k" ] && stripesize=""
63    allocation=`GetValueFromField $fname "LV Size"`
64    [ ! "`echo "$allocation" | grep "[k,m,g]"`" ] && allocation="$allocation"m
65    if echo "$allocation" | grep -E '^.*g$' > /dev/null 2> /dev/null ; then
66        val=`echo "$allocation" | sed s/g//`
67        allocation=`echo "$val" | awk '{c=$1; printf "%d", c*1024;}'`m
68    fi
69    readahead=`GetValueFromField $fname "Read ahead sectors"`
70    rm -f $fname
71    [ "$stripes" ]    && output="$output -i $stripes"
72    [ "$stripesize" ] && output="$output -I $stripesize"
73    [ "$allocation" ] && output="$output -L $allocation"
74    [ "$readahead" ]  && output="$output -r $readahead"
75    echo "$output"
76}
77
78
79
80GenerateVgcreateParameters() {
81    local current_VG device fname incoming VG_info_file max_logical_volumes max_physical_volumes physical_extent_size output blanklines
82    current_VG=$1
83    VG_info_file=$MINDI_TMP/$$.vg-info.txt
84    $LVMCMD vgdisplay $current_VG > $VG_info_file
85    max_logical_volumes=`GetValueFromField "$VG_info_file" "MAX LV"`
86    [ $max_logical_volumes -ge 256 ] && max_logical_volumes=255
87    max_physical_volumes=`GetValueFromField "$VG_info_file" "MAX PV"`
88    [ $max_physical_volumes -ge 256 ] && max_physical_volumes=255
89    physical_extent_size=`GetValueFromField "$VG_info_file" "PE Size"`
90    output=""
91    [ "$max_logical_volumes" ]  && output="$output -l $max_logical_volumes"
92    [ "$max_physical_volumes" ] && output="$output -p $max_physical_volumes"
93    [ "$physical_extent_size" ] && output="$output -s $physical_extent_size"
94    echo "$output"
95    rm -f $VG_info_file
96}
97
98
99
100
101
102ProcessVolumeGroup() {
103    local current_VG physical_volumes i list_of_devices VG_params
104    current_VG=$1
105    if [ $lvmversion = 2 ]; then
106        VG_params=`GenerateVgcreateParameters $current_VG`
107        list_of_devices=`$LVMCMD pvs | grep " $current_VG " | awk '{print $1}'`
108    else
109        info_file=/proc/lvm/VGs/$current_VG/group
110        physical_volumes=`ls /proc/lvm/VGs/$current_VG/PVs`
111        VG_params=`GenerateVgcreateParameters $current_VG`
112        list_of_devices=""
113        for i in $physical_volumes ; do
114            fname=/proc/lvm/VGs/$current_VG/PVs/$i
115            device=`GetValueFromField $fname "name:"`
116            list_of_devices="$list_of_devices $device"
117        done
118    fi
119    l=""
120    if [ -f /etc/multipath.conf ]; then
121        # If multipath check which type of devidec are given, mpath prefered
122        for d in $list_of_devices; do
123            l="$l `GiveMapperOfdm $d`"
124        done
125        list_of_devices=$l
126    fi
127
128    echo "# $LVMCMD vgcreate $current_VG$VG_params $list_of_devices"
129    echo "# $LVMCMD vgchange -a y $current_VG"
130}
131
132
133
134ListAllPhysicalVolumes() {
135    if [ $lvmversion = 2 ]; then
136        $LVMCMD pvscan 2> /dev/null | grep 'PV' | awk '{print $2}' >  $MINDI_TMP/pv.tmp
137    else
138        pvscan 2> /dev/null | grep '"' | cut -d'"' -f2  >  $MINDI_TMP/pv.tmp
139    fi
140    if [ -f /etc/multipath.conf ]; then
141        # If multipath check which type of devidec are given, mpath prefered
142        for d in `cat  $MINDI_TMP/pv.tmp`; do
143            GiveMapperOfdm $d
144        done
145    else
146        cat $MINDI_TMP/pv.tmp
147    fi
148    rm -f $MINDI_TMP/pv.tmp
149}
150
151
152ListAllVolumeGroups() {
153    $LVMCMD vgdisplay 2> /dev/null | awk '/^ *VG Name/ {print $3;}'
154}
155
156GiveMapperOfdm () {
157
158major=`stat -c "%t" $1`
159minor=`stat -c "%T" $1`
160
161for i in `ls /dev/mapper/*`; do
162    mj=`stat -c "%t" $i`
163    mn=`stat -c "%T" $i`
164    if [ "$mj" = "$major" ] && [ "$mn" = "$minor" ]; then
165        echo "$i"
166        return
167    fi
168done
169echo $1
170}
171
172
173ListLvmDrivesAndPartitions() {
174    $LVMCMD vgdisplay -v 2> /dev/null | grep "PV Name" | sed 's/(#)//' | awk '{print $3}' > $MINDI_TMP/vg.tmp
175    if [ -f /etc/multipath.conf ]; then
176        # If multipath check which type of devidec are given, mpath prefered
177        for d in `cat  $MINDI_TMP/vg.tmp`; do
178            GiveMapperOfdm $d
179        done
180    else
181        cat $MINDI_TMP/vg.tmp
182    fi
183    rm -f $MINDI_TMP/vg.tmp
184}
185
186
187
188PrettifyList() {
189    local i
190    echo -en "$1"
191    for i in $2 ; do
192        echo -en "$i "
193    done
194    echo ""
195}
196
197
198ListAllLogicalVolumes() {
199    if [ $lvmversion = 2 ]; then
200        $LVMCMD lvscan 2> /dev/null | grep "'" | cut -d"'" -f2
201    else
202        lvscan 2> /dev/null | grep '"' | cut -d'"' -f2
203    fi
204}
205
206
207
208WriteShutdownScript() {
209    local i
210    echo ""
211    echo "Finally, to shut down and delete the volumes, do this:-"
212    for i in `ListAllLogicalVolumes` ; do
213        echo "($LVMCMD lvremove -f $i)"
214    done
215    for i in `ListAllVolumeGroups` ; do
216        echo "($LVMCMD vgchange -a n $i)"
217    done
218    for i in `ListAllVolumeGroups` ; do
219        echo "($LVMCMD vgremove $i)"
220    done
221    if [ $lvmversion = 2 ]; then
222        echo "(rmmod dm-mod & rmmod dm_mod & )"
223    else
224        echo "(rmmod lvm-mod)"
225    fi
226}
227
228
229
230# -------------------------------- main -----------------------------------
231which lvmdiskscan 2>/dev/null 2>&1 || Die "lvmdiskscan not found. Won't handle LVM."
232if [ -e "/proc/lvm/global" ] && [ "`tr -s '\t' ' ' < /proc/lvm/global | grep "0 VGs 0 PVs 0 LVs"`" != "" ]; then
233    exit 1
234fi
235
236# Older lvmdiskscan use --help, newer --version
237lvmopt="--help"
238lvmdiskscan $lvmopt 2>&1 | grep -q -- "--version"
239if [ $? -eq 0 ]; then
240    lvmopt="--version"
241fi
242
243
244lvmversion=`lvmdiskscan --help 2>&1 |
245  grep -E "Logical Volume Manager|LVM version:" |
246  cut -d: -f2 | cut -d. -f1 |
247  awk '{print $NF}' |
248  sed -e 's/ //g'`
249
250if which lvm 2>/dev/null; then
251    version=`lvm version | grep "LVM version" | awk '{print $3}'`
252    i="`echo "$version" | cut -d'.' -f1`"
253    echo "i=$i"
254    if [ "$i" -ge "2" ] ; then
255        lvmversion=2
256    fi
257fi
258
259if [ $lvmversion = 2 ]; then
260    echo "LVM version >= 2.0 found."
261    LVMCMD="lvm"
262else
263    LVMCMD=""
264fi
265
266all_lvm_drives_and_partitions=`ListLvmDrivesAndPartitions`
267echo "Just before you extrapolate mountlist to include RAID partitions,"
268echo "extrapolate it to include the following LVM drives and partitions:-"
269PrettifyList ">>>>> " "$all_lvm_drives_and_partitions"
270echo "To get started, type:-"
271if [ $lvmversion = 2 ]; then
272    echo "(insmod dm-mod)"
273    echo "(insmod dm_mod)"
274else
275    echo "(insmod lvm-mod)"
276fi
277echo "# $LVMCMD vgchange -an"
278for i in `ListAllPhysicalVolumes` ; do
279    echo "# echo y | $LVMCMD pvcreate -ff $i"
280done
281echo "# $LVMCMD vgscan"
282echo ""
283echo "Create and activate the VG's (volume groups)."
284all_volume_groups=`ListAllVolumeGroups`
285for current_VG in $all_volume_groups ; do
286    if [ $lvmversion -ne 2 ]; then
287        echo "# rm -Rf /dev/$current_VG"
288    fi
289    ProcessVolumeGroup $current_VG
290done
291echo ""
292echo "Finally, create the LV's (logical volumes)."
293all_logical_volumes=`ListAllLogicalVolumes`
294for current_LV in $all_logical_volumes ; do
295    ProcessLogicalVolume $current_LV
296done
297echo ""
298echo "# $LVMCMD vgscan"
299echo "Now you may format the LV's:-"
300for i in `ListAllLogicalVolumes` ; do
301    echo "(mkfs -t foo $i or something like that)"
302done
303WriteShutdownScript
304exit 0
305
306
307
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