1 | #!/bin/bash |
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2 | # |
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3 | # $Id: analyze-my-lvm 2044 2008-10-10 18:00:51Z bruno $ |
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4 | # |
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5 | |
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6 | Die() { |
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7 | echo "$1" >> /dev/stderr |
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8 | exit -1 |
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9 | } |
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10 | |
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11 | |
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12 | |
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13 | GetValueFromField() { |
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14 | local res |
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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 $0;};}' |
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16 | } |
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17 | |
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18 | |
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19 | GetLastBit() { |
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20 | local i res |
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21 | i=20 |
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22 | res="" |
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23 | while [ ! "$res" ] ; do |
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24 | i=$(($i-1)) |
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25 | res=`echo "$1" | cut -d'/' -f$i` |
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26 | done |
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27 | echo "$res" |
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28 | } |
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29 | |
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30 | |
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31 | ProcessLogicalVolume() { |
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32 | local LV_full_string fname logical_volume volume_group device |
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33 | LV_full_string=$1 |
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34 | [ ! -e "$1" ] && Die "Cannot find LV file $1" |
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35 | volume_group=`echo "$LV_full_string" | cut -d'/' -f3` |
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36 | logical_volume=`echo "$LV_full_string" | cut -d'/' -f4` |
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37 | if [ $lvmversion = 2 ]; then |
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38 | device=$LV_full_string |
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39 | params=`GenerateLvcreateParameters $device` |
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40 | else |
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41 | fname=/proc/lvm/VGs/$volume_group/LVs/$logical_volume |
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42 | if [ ! -e "$fname" ] ; then |
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43 | echo "Warning - cannot find $volume_group's $logical_volume LV file" |
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44 | else |
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45 | device=`GetValueFromField $fname "name:"` |
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46 | params=`GenerateLvcreateParameters $device` |
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47 | fi |
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48 | fi |
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49 | echo "# $LVMCMD lvcreate$params -n $logical_volume $volume_group" |
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50 | } |
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51 | |
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52 | |
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53 | GenerateLvcreateParameters() { |
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54 | local device stripes stripesize device fname allocation output readahead |
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55 | fname=$MINDI_TMP/PLF.$$.txt |
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56 | device=$1 |
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57 | output="" |
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58 | $LVMCMD lvdisplay $device > $fname |
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59 | stripes=`GetValueFromField $fname "Stripes"` |
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60 | stripesize=`GetValueFromField $fname "Stripe size (MByte)"`m |
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61 | [ "$stripesize" = "m" ] && stripesize=`GetValueFromField $fname "Stripe size (KByte)"`k |
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62 | [ "$stripesize" = "k" ] && stripesize="" |
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63 | allocation=`GetValueFromField $fname "LV Size"` |
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64 | [ ! "`echo "$allocation" | grep "[k,m,g]"`" ] && allocation="$allocation"m |
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65 | if echo "$allocation" | grep -E '^.*g$' > /dev/null 2> /dev/null ; then |
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66 | val=`echo "$allocation" | sed s/g//` |
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67 | allocation=`echo "$val" | awk '{c=$1; printf "%d", c*1024;}'`m |
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68 | fi |
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69 | readahead=`GetValueFromField $fname "Read ahead sectors"` |
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70 | rm -f $fname |
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71 | [ "$stripes" ] && output="$output -i $stripes" |
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72 | [ "$stripesize" ] && output="$output -I $stripesize" |
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73 | [ "$allocation" ] && output="$output -L $allocation" |
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74 | [ "$readahead" ] && output="$output -r $readahead" |
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75 | echo "$output" |
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76 | } |
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77 | |
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78 | |
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79 | |
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80 | GenerateVgcreateParameters() { |
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81 | local current_VG device fname incoming VG_info_file max_logical_volumes max_physical_volumes physical_extent_size output blanklines |
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82 | current_VG=$1 |
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83 | VG_info_file=$MINDI_TMP/$$.vg-info.txt |
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84 | $LVMCMD vgdisplay $current_VG > $VG_info_file |
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85 | max_logical_volumes=`GetValueFromField "$VG_info_file" "MAX LV"` |
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86 | [ $max_logical_volumes -ge 256 ] && max_logical_volumes=255 |
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87 | max_physical_volumes=`GetValueFromField "$VG_info_file" "MAX PV"` |
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88 | [ $max_physical_volumes -ge 256 ] && max_physical_volumes=255 |
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89 | physical_extent_size=`GetValueFromField "$VG_info_file" "PE Size"` |
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90 | output="" |
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91 | [ "$max_logical_volumes" ] && output="$output -l $max_logical_volumes" |
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92 | [ "$max_physical_volumes" ] && output="$output -p $max_physical_volumes" |
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93 | [ "$physical_extent_size" ] && output="$output -s $physical_extent_size" |
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94 | echo "$output" |
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95 | rm -f $VG_info_file |
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96 | } |
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97 | |
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98 | |
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99 | |
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100 | |
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101 | |
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102 | ProcessVolumeGroup() { |
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103 | local current_VG physical_volumes i list_of_devices VG_params |
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104 | current_VG=$1 |
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105 | if [ $lvmversion = 2 ]; then |
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106 | VG_params=`GenerateVgcreateParameters $current_VG` |
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107 | list_of_devices=`$LVMCMD pvs | grep " $current_VG " | awk '{print $1}'` |
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108 | else |
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109 | info_file=/proc/lvm/VGs/$current_VG/group |
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110 | physical_volumes=`ls /proc/lvm/VGs/$current_VG/PVs` |
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111 | VG_params=`GenerateVgcreateParameters $current_VG` |
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112 | list_of_devices="" |
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113 | for i in $physical_volumes ; do |
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114 | fname=/proc/lvm/VGs/$current_VG/PVs/$i |
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115 | device=`GetValueFromField $fname "name:"` |
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116 | list_of_devices="$list_of_devices $device" |
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117 | done |
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118 | fi |
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119 | echo "# $LVMCMD vgcreate $current_VG$VG_params $list_of_devices" |
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120 | echo "# $LVMCMD vgchange -a y $current_VG" |
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121 | } |
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122 | |
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123 | |
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124 | |
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125 | ListAllPhysicalVolumes() { |
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126 | if [ $lvmversion = 2 ]; then |
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127 | $LVMCMD pvscan 2> /dev/null | grep 'PV' | awk '{print $2}' |
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128 | else |
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129 | pvscan 2> /dev/null | grep '"' | cut -d'"' -f2 |
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130 | fi |
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131 | } |
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132 | |
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133 | |
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134 | ListAllVolumeGroups() { |
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135 | $LVMCMD vgdisplay 2> /dev/null | awk '/^ *VG Name/ {print $3;}' |
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136 | } |
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137 | |
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138 | |
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139 | ListLvmDrivesAndPartitions() { |
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140 | $LVMCMD vgdisplay -v 2> /dev/null | grep "PV Name" | sed 's/(#)//' | awk '{print $3}' |
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141 | } |
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142 | |
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143 | |
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144 | |
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145 | PrettifyList() { |
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146 | local i |
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147 | echo -en "$1" |
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148 | for i in $2 ; do |
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149 | echo -en "$i " |
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150 | done |
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151 | echo "" |
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152 | } |
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153 | |
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154 | |
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155 | ListAllLogicalVolumes() { |
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156 | if [ $lvmversion = 2 ]; then |
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157 | $LVMCMD lvscan 2> /dev/null | grep "'" | cut -d"'" -f2 |
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158 | else |
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159 | lvscan 2> /dev/null | grep '"' | cut -d'"' -f2 |
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160 | fi |
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161 | } |
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162 | |
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163 | |
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164 | |
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165 | WriteShutdownScript() { |
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166 | local i |
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167 | echo "" |
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168 | echo "Finally, to shut down and delete the volumes, do this:-" |
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169 | for i in `ListAllLogicalVolumes` ; do |
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170 | echo "($LVMCMD lvremove -f $i)" |
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171 | done |
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172 | for i in `ListAllVolumeGroups` ; do |
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173 | echo "($LVMCMD vgchange -a n $i)" |
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174 | done |
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175 | for i in `ListAllVolumeGroups` ; do |
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176 | echo "($LVMCMD vgremove $i)" |
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177 | done |
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178 | if [ $lvmversion = 2 ]; then |
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179 | echo "(rmmod dm-mod & rmmod dm_mod & )" |
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180 | else |
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181 | echo "(rmmod lvm-mod)" |
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182 | fi |
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183 | } |
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184 | |
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185 | |
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186 | |
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187 | # -------------------------------- main ----------------------------------- |
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188 | which lvmdiskscan 2>/dev/null 2>&1 || Die "lvmdiskscan not found. Won't handle LVM." |
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189 | if [ -e "/proc/lvm/global" ] && [ "`tr -s '\t' ' ' < /proc/lvm/global | grep "0 VGs 0 PVs 0 LVs"`" != "" ]; then |
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190 | exit 1 |
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191 | fi |
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192 | |
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193 | lvmversion=`lvmdiskscan --help 2>&1 | |
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194 | grep -E "Logical Volume Manager|LVM version:" | |
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195 | cut -d: -f2 | cut -d. -f1 | |
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196 | awk '{print $NF}' | |
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197 | sed -e 's/ //g'` |
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198 | |
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199 | if which lvm 2>/dev/null; then |
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200 | version=`lvm version | grep "LVM version" | awk '{print $3}'` |
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201 | i="`echo "$version" | cut -d'.' -f1`" |
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202 | echo "i=$i" |
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203 | if [ "$i" -ge "2" ] ; then |
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204 | lvmversion=2 |
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205 | fi |
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206 | fi |
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207 | |
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208 | if [ $lvmversion = 2 ]; then |
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209 | echo "LVM version >= 2.0 found." |
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210 | LVMCMD="lvm" |
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211 | else |
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212 | LVMCMD="" |
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213 | fi |
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214 | |
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215 | all_lvm_drives_and_partitions=`ListLvmDrivesAndPartitions` |
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216 | echo "Just before you extrapolate mountlist to include RAID partitions," |
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217 | echo "extrapolate it to include the following LVM drives and partitions:-" |
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218 | PrettifyList ">>>>> " "$all_lvm_drives_and_partitions" |
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219 | echo "To get started, type:-" |
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220 | if [ $lvmversion = 2 ]; then |
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221 | echo "(insmod dm-mod)" |
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222 | echo "(insmod dm_mod)" |
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223 | else |
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224 | echo "(insmod lvm-mod)" |
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225 | fi |
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226 | echo "# $LVMCMD vgchange -an" |
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227 | for i in `ListAllPhysicalVolumes` ; do |
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228 | echo "# echo y | $LVMCMD pvcreate -ff $i" |
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229 | done |
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230 | echo "# $LVMCMD vgscan" |
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231 | echo "" |
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232 | echo "Create and activate the VG's (volume groups)." |
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233 | all_volume_groups=`ListAllVolumeGroups` |
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234 | for current_VG in $all_volume_groups ; do |
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235 | if [ $lvmversion -ne 2 ]; then |
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236 | echo "# rm -Rf /dev/$current_VG" |
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237 | fi |
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238 | ProcessVolumeGroup $current_VG |
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239 | done |
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240 | echo "" |
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241 | echo "Finally, create the LV's (logical volumes)." |
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242 | all_logical_volumes=`ListAllLogicalVolumes` |
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243 | for current_LV in $all_logical_volumes ; do |
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244 | ProcessLogicalVolume $current_LV |
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245 | done |
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246 | echo "" |
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247 | echo "# $LVMCMD vgscan" |
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248 | echo "Now you may format the LV's:-" |
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249 | for i in `ListAllLogicalVolumes` ; do |
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250 | echo "(mkfs -t foo $i or something like that)" |
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251 | done |
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252 | WriteShutdownScript |
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253 | exit 0 |
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254 | |
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255 | |
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256 | |
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