source: trunk/mindi/analyze-my-lvm @ 272

Last change on this file since 272 was 98, checked in by bcornec, 14 years ago

merge -r 96:97 from 2.04 branch

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File size: 8.9 KB
Line 
1#!/bin/sh
2
3
4#------------------------- ANALYZE-MY-LVM ----------------------- Hugo Rabson
5# 07/14
6# - no longer blank first 4k of /dev/mdX
7#
8# 06/14/2004
9# - fixed "n >= 2.00" bug (shell doesn't handle floating points properly)
10# - handle dm_mod as well as dm-mod
11#
12# 02/18/2004
13# - nice patch to fix ListAllVolumeGroups() --- J. Richard
14# - patch to support LVM2 by Takeru Komoriya
15#
16# 10/15/2003
17# - fixed '-L'-handling to allow for floating-point gigabyte values
18#
19# 01/15/2003
20# - patch (LVM) by Brian Borgeson
21#
22# 12/10/2002
23# - patch by Benjamin Mampaey
24#
25# 09/05/2002
26# - additional patch by Ralph Gruwe
27#
28# 08/30/2002
29# - modified by Ralph Gruwe
30#
31# 10/01/2001
32# - last modified by Hugo :)
33#------------------------------------------------------------------------------
34
35Die() {
36    echo "$1" >> /dev/stderr
37    exit 1
38}
39
40
41
42GetValueFromField() {
43    local res
44    cat "$1" | sed s/'    '/~/ | tr -s ' ' ' ' | sed s/'~ '/'~'/ | grep -i "$2~" | cut -d'~' -f2,3,4,5 | tr '~' ' ' | gawk '{ if ($2=="MB") {printf "%sm",$1;} else if ($2=="KB") {printf "%sk",$1;} else if ($2=="GB") {printf "%sg",$1;} else {print $0;};}'
45}
46
47
48GetLastBit() {
49    local i res
50    i=20
51    res=""
52    while [ ! "$res" ] ; do
53    i=$(($i-1))
54    res=`echo "$1" | cut -d'/' -f$i`
55    done
56    echo "$res"
57}
58
59
60ProcessLogicalVolume() {
61    local LV_full_string fname logical_volume volume_group device
62    LV_full_string=$1
63    [ ! -e "$1" ] && Die "Cannot find LV file $1"
64    volume_group=`echo "$LV_full_string" | cut -d'/' -f3`
65    logical_volume=`echo "$LV_full_string" | cut -d'/' -f4`
66    if [ $lvmversion = 2 ]; then
67    device=$LV_full_string
68    params=`GenerateLvcreateParameters $device`
69    echo "# lvm lvcreate$params -n $logical_volume $volume_group"
70    else
71    fname=/proc/lvm/VGs/$volume_group/LVs/$logical_volume
72    if [ ! -e "$fname" ] ; then
73        echo "Warning - cannot find $volume_group's $logical_volume LV file"
74    else
75        device=`GetValueFromField $fname "name:"`
76        params=`GenerateLvcreateParameters $device`
77        echo "# lvcreate$params -n $logical_volume $volume_group"
78    fi
79    fi
80}
81
82
83GenerateLvcreateParameters() {
84    local device stripes stripesize device fname allocation output readahead
85    fname=/tmp/PLF.$$.txt
86    device=$1
87    output=""
88    if [ $lvmversion = 2 ]; then
89    lvm lvdisplay $device > $fname
90    else
91    lvdisplay $device > $fname
92    fi
93    stripes=`GetValueFromField $fname "Stripes"`
94    stripesize=`GetValueFromField $fname "Stripe size (MByte)"`m
95    [ "$stripesize" = "m" ] && stripesize=`GetValueFromField $fname "Stripe size (KByte)"`k
96    [ "$stripesize" = "k" ] && stripesize=""
97    allocation=`GetValueFromField $fname "LV Size"`
98    [ ! "`echo "$allocation" | grep "[k,m,g]"`" ] && allocation="$allocation"m
99    if echo "$allocation" | grep -x ".*g" > /dev/null 2> /dev/null ; then
100    val=`echo "$allocation" | sed s/g//`
101    allocation=`echo "$val" | awk '{c=$1; printf "%d", c*1024;}'`m
102    fi
103    readahead=`GetValueFromField $fname "Read ahead sectors"`
104    rm -f $fname
105    [ "$stripes" ]    && output="$output -i $stripes"
106    [ "$stripesize" ] && output="$output -I $stripesize"
107    [ "$allocation" ] && output="$output -L $allocation"
108    [ "$readahead" ]  && output="$output -r $readahead"
109    echo "$output"
110}
111
112
113
114GenerateVgcreateParameters() {
115    local current_VG device fname incoming VG_info_file max_logical_volumes max_physical_volumes physical_extent_size output blanklines
116    current_VG=$1
117    VG_info_file=/tmp/$$.vg-info.txt
118    if [ $lvmversion = 2 ]; then
119    lvm vgdisplay $current_VG > $VG_info_file
120    else
121    vgdisplay $current_VG > $VG_info_file
122    fi
123    max_logical_volumes=`GetValueFromField "$VG_info_file" "MAX LV"`
124    [ $max_logical_volumes -ge 256 ] && max_logical_volumes=255
125    max_physical_volumes=`GetValueFromField "$VG_info_file" "MAX PV"`
126    [ $max_physical_volumes -ge 256 ] && max_physical_volumes=255
127    physical_extent_size=`GetValueFromField "$VG_info_file" "PE Size"`
128    output=""
129    [ "$max_logical_volumes" ]  && output="$output -l $max_logical_volumes"
130    [ "$max_physical_volumes" ] && output="$output -p $max_physical_volumes"
131    [ "$physical_extent_size" ] && output="$output -s $physical_extent_size"
132    echo "$output"
133    rm -f $VG_info_file
134}
135
136
137
138
139
140ProcessVolumeGroup() {
141    local current_VG physical_volumes i list_of_devices VG_params
142    current_VG=$1
143    if [ $lvmversion = 2 ]; then
144    VG_params=`GenerateVgcreateParameters $current_VG`
145    list_of_devices=`lvm pvs | grep "$current_VG" | awk '{print $1}'`
146    echo "# lvm vgcreate $current_VG$VG_params $list_of_devices"
147    echo "# lvm vgchange -a y $current_VG"
148    else
149    info_file=/proc/lvm/VGs/$current_VG/group
150    physical_volumes=`ls /proc/lvm/VGs/$current_VG/PVs`
151    VG_params=`GenerateVgcreateParameters $current_VG`
152    list_of_devices=""
153    for i in $physical_volumes ; do
154        fname=/proc/lvm/VGs/$current_VG/PVs/$i
155        device=`GetValueFromField $fname "name:"`
156        list_of_devices="$list_of_devices $device"
157    done
158    echo "# vgcreate $current_VG$VG_params$list_of_devices"
159    echo "# vgchange -a y $current_VG"
160    fi
161}
162
163
164
165ListAllPhysicalVolumes() {
166    if [ $lvmversion = 2 ]; then
167    lvm pvscan 2> /dev/null | grep 'PV' | awk '{print $2}'
168    else
169    pvscan 2> /dev/null | grep '"' | cut -d'"' -f2
170    fi
171}
172
173
174ListAllVolumeGroups() {
175    if [ $lvmversion = 2 ]; then
176        lvm vgdisplay 2> /dev/null | awk '/^ *VG Name/ {print $3;}'
177    else
178        vgdisplay 2> /dev/null | awk '/^VG Name/ {print $3;}'
179    fi
180}
181
182
183ListLvmDrivesAndPartitions() {
184    if [ $lvmversion = 2 ]; then
185    lvm vgdisplay -v |grep "PV Name" | awk '{print $3}'
186    else
187    vgdisplay -v |grep "PV Name" | awk '{print $4}'
188    fi
189}
190
191
192
193PrettifyList() {
194    local i
195    echo -en "$1"
196    for i in $2 ; do
197    echo -en "$i "
198    done
199    echo ""
200}
201
202
203ListAllLogicalVolumes() {
204    if [ $lvmversion = 2 ]; then
205    lvm lvscan | grep "'" | cut -d"'" -f2
206    else
207    lvscan | grep '"' | cut -d'"' -f2
208    fi
209}
210
211
212
213WriteShutdownScript() {
214    local i
215    echo ""
216    echo "Finally, to shut down and delete the volumes, do this:-"
217    if [ $lvmversion = 2 ]; then
218    for i in `ListAllLogicalVolumes` ; do
219        echo "(lvm lvremove -f $i)"
220    done
221    for i in `ListAllVolumeGroups` ; do
222        echo "(lvm vgchange -a n $i)"
223    done
224    for i in `ListAllVolumeGroups` ; do
225        echo "(lvm vgremove $i)"
226    done
227    echo "(rmmod dm-mod & rmmod dm_mod & )"
228    else
229    for i in `ListAllLogicalVolumes` ; do
230        echo "(lvremove -f $i)"
231    done
232    for i in `ListAllVolumeGroups` ; do
233        echo "(vgchange -a n $i)"
234    done
235    for i in `ListAllVolumeGroups` ; do
236        echo "(vgremove $i)"
237    done
238    echo "(rmmod lvm-mod)"
239    fi
240}
241
242
243
244# -------------------------------- main -----------------------------------
245which lvmdiskscan 2>/dev/null 2>&1 || Die "Cannot find lvmdiskscan. Are you sure you're using LVM?"
246if [ -e "/proc/lvm/global" ] && [ "`cat /proc/lvm/global | tr -s '\t' ' ' | grep "0 VGs 0 PVs 0 LVs"`" != "" ] ; then
247    exit 0
248fi
249
250# Sq-Mod ... V1 has different output. --version is not legal but version
251# gets displayed so I guess it's ok... This should work for both.
252
253#lvmversion=`lvmdiskscan --version | grep "LVM version:" | cut -d: -f2 | cut -d. -f1 | sed -e 's/ //g'`
254
255lvmversion=`lvmdiskscan --help |
256  grep -E "Logical Volume Manager|LVM version:" |
257  cut -d: -f2 | cut -d. -f1 |
258  awk '{print $NF}' |
259  sed -e 's/ //g'`
260
261if which lvm 2>/dev/null; then
262    version=`lvm version | grep "LVM version" | awk '{print $3}'`
263    i="`echo "$version" | cut -d'.' -f1`"
264    echo "i=$i"
265    if [ "$i" -ge "2" ] ; then
266#    if [ $version >= "2.00" ]; then
267    lvmversion=2
268    fi
269fi
270
271if [ $lvmversion = 2 ]; then
272    echo "LVM version >= 2.0 found."
273fi
274
275all_lvm_drives_and_partitions=`ListLvmDrivesAndPartitions`
276echo "Just before you extrapolate mountlist to include RAID partitions,"
277echo "extrapolate it to include the following LVM drives and partitions:-"
278PrettifyList ">>>>> " "$all_lvm_drives_and_partitions"
279echo "To get started, type:-"
280if [ $lvmversion = 2 ]; then
281    echo "(insmod dm-mod)"
282    echo "(insmod dm_mod)"
283    echo "# lvm vgchange -an"
284else
285    echo "(insmod lvm-mod)"
286    echo "# vgchange -an"
287fi
288for i in `ListAllPhysicalVolumes` ; do
289#    echo "# dd if=/dev/zero of=$i bs=512 count=1"
290    if [ $lvmversion = 2 ]; then
291    echo "# echo y | lvm pvcreate -ff $i"
292    else
293    echo "# echo y | pvcreate -ff $i"
294    fi
295done
296if [ $lvmversion = 2 ]; then
297    echo "# lvm vgscan; echo"
298else
299    echo "# vgscan; echo"
300fi
301echo ""
302echo "Create and activate the VG's (volume groups)."
303all_volume_groups=`ListAllVolumeGroups`
304for current_VG in $all_volume_groups ; do
305    if [ $lvmversion -ne 2 ]; then
306        echo "# rm -Rf /dev/$current_VG"
307    fi
308    ProcessVolumeGroup $current_VG
309done
310echo ""
311echo "Finally, create the LV's (logical volumes)."
312all_logical_volumes=`ListAllLogicalVolumes`
313for current_LV in $all_logical_volumes ; do
314    ProcessLogicalVolume $current_LV
315done
316echo ""
317if [ $lvmversion = 2 ]; then
318    echo "# lvm vgscan"
319else
320    echo "# vgscan"
321fi
322echo "Now you may format the LV's:-"
323for i in `ListAllLogicalVolumes` ; do
324    echo "(mkfs -t foo $i or something like that)"
325done
326WriteShutdownScript
327exit 0
328
329
330
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