| 1 | #!/usr/bin/perl -w
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| 2 | #
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| 3 | # Analyze the LVM configuration
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| 4 | # and stor the configuration for restore time
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| 5 | #
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| 6 | # $Id$
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| 7 | #
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| 8 | # Copyright B. Cornec 2008
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| 9 | # Provided under the GPL v2
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| 10 |
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| 11 | # Syntax: see below
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| 12 |
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| 13 | use strict 'vars';
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| 14 | use Getopt::Long qw(:config auto_abbrev no_ignore_case);
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| 15 | use Data::Dumper;
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| 16 | use English;
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| 17 | use File::Basename;
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| 18 | use File::Copy;
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| 19 | use File::stat;
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| 20 | use File::Temp qw(tempdir);
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| 21 | use POSIX qw(strftime);
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| 22 | use lib qw (lib);
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| 23 | use ProjectBuilder::Base;
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| 24 | use ProjectBuilder::Distribution;
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| 25 |
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| 26 | =pod
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| 27 |
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| 28 | =head1 NAME
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| 29 |
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| 30 | Analyze-lvm - A Mindi Tool to analyze the LVM configuration and store it
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| 31 |
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| 32 | =head1 DESCRIPTION
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| 33 |
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| 34 | B<anlyze-lvm> prints all the information related to the LVM configuration that may be used by a restoration process
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| 35 |
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| 36 | =head1 SYNOPSIS
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| 37 |
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| 38 | analyze-lvm [-v]|[-q]|[-h]|[--man]
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| 39 |
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| 40 | =head1 OPTIONS
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| 41 |
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| 42 | =over 4
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| 43 |
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| 44 | =item B<-v|--verbose>
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| 45 |
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| 46 | Print a brief help message and exits.
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| 47 |
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| 48 |
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| 49 | =item B<-q|--quiet>
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| 50 |
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| 51 | Do not print any output.
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| 52 |
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| 53 | =item B<-h|--help>
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| 54 |
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| 55 | Print a brief help message and exits.
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| 56 |
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| 57 | =item B<--man>
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| 58 |
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| 59 | Prints the manual page and exits.
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| 60 |
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| 61 | =item B<-i|--iso iso_image>
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| 62 |
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| 63 | Name of the ISO image you want to created.
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| 64 |
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| 65 | =back
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| 66 |
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| 67 | =head1 WEB SITES
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| 68 |
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| 69 | The main Web site of the project is available at L<http://www.mondorescue.org/>. Bug reports should be filled using the trac instance of the project at L<http://trac.mondorescue.org/>.
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| 70 |
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| 71 | =head1 USER MAILING LIST
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| 72 |
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| 73 | The miling list of the project is available at L<mailto:mondo@lists.sf.net>
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| 74 |
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| 75 | =head1 AUTHORS
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| 76 |
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| 77 | The Mondorescue.org team L<http://www.mondorescue.org/> lead by Bruno Cornec L<mailto:bruno@mondorescue.org>.
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| 78 |
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| 79 | =head1 COPYRIGHT
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| 80 |
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| 81 | Analyze-LVM is distributed under the GPL v2.0 license
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| 82 | described in the file C<COPYING> included with the distribution.
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| 83 |
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| 84 | =cut
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| 85 |
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| 86 |
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| 87 | # ---------------------------------------------------------------------------
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| 88 |
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| 89 | # Initialize the syntax string
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| 90 |
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| 91 | pb_syntax_init("analyze-lvm Version PBVER-rPBREV\n");
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| 92 |
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| 93 | # Handle options
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| 94 | #
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| 95 | GetOptions("help|?|h" => \$opts{'h'},
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| 96 | "man" => \$opts{'man'},
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| 97 | "verbose|v+" => \$opts{'v'},
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| 98 | "quiet|q" => \$opts{'q'},
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| 99 | "log-files|l=s" => \$opts{'l'},
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| 100 | "version|V" => \$opts{'V'},
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| 101 | ) || pb_syntax(-1,0);
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| 102 |
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| 103 | # easy options
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| 104 | if (defined $opts{'h'}) {
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| 105 | pb_syntax(0,1);
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| 106 | }
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| 107 | if (defined $opts{'man'}) {
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| 108 | pb_syntax(0,2);
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| 109 | }
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| 110 | if (defined $opts{'v'}) {
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| 111 | $pbdebug = $opts{'v'};
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| 112 | }
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| 113 | if (defined $opts{'q'}) {
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| 114 | $pbdebug=-1;
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| 115 | }
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| 116 |
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| 117 | #
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| 118 | # Global variables
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| 119 | #
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| 120 | my $MINDI_VERSION = "PBVER-rPBREV";
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| 121 | my $MINDI_PREFIX = "PBPREFIX";
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| 122 | my $MINDI_CONF = "PBCONF";
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| 123 | my $MINDI_LIB = "PBLIB";
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| 124 | my $MINDI_SBIN = "$MINDI_PREFIX/sbin";
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| 125 | #
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| 126 | # Temp dir
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| 127 | #
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| 128 | pb_temp_init();
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| 129 |
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| 130 | my $lvmds = "/usr/sbin/lvmdiskscan";
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| 131 | my $lvmproc = "/proc/lvm/global";
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| 132 | my $lvmcmd = "/usr/sbi/lvm";
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| 133 |
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| 134 | # -------------------------------- main -----------------------------------
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| 135 | mr_exit(-1,"$lvmds doesn't exist. No LVM handling.") if ((! -x $lvmds) ;
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| 136 | mr_exit(-1,"$lvmproc doesn't exist. No LVM handling.") if ((! -x $lvmproc) ;
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| 137 |
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| 138 | # Check LVM volumes presence
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| 139 | open(LVM,$lvmproc) || mr_exit(-1,"Unable to open $lvmproc");
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| 140 | while (<LVM>) {
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| 141 | mr_exit(1,"No LVM volumes found in $lvmproc") if (/0 VGs 0 PVs 0 LVs/);
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| 142 | }
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| 143 | close(LVM);
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| 144 |
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| 145 | # Check LVM version
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| 146 | my $lvmver=0;
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| 147 | open(LVM,"$lvmds --help 2>&1 |") || mr_exit(-1,"Unable to execute $lvmds");
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| 148 | while (<LVM>) {
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| 149 | if (/Logical Volume Manager/ || /LVM version:/) {
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| 150 | $lvmver = $_;
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| 151 | $lvmver =~ s/:([0-9])\..*/$1/;
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| 152 | }
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| 153 | }
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| 154 | close(LVM);
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| 155 | #lvmversion=`lvmdiskscan --help 2>&1 |
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| 156 | #grep -E "Logical Volume Manager|LVM version:" |
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| 157 | #cut -d: -f2 | cut -d. -f1 |
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| 158 | #awk '{print $NF}' |
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| 159 | #sed -e 's/ //g'`
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| 160 |
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| 161 | if ($lvmver = 0) {
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| 162 | # Still not found
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| 163 | if (-x $lvmcmd) {
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| 164 | open(LVM,"$lvmcmd version |") || mr_exit(-1,"Unable to execute $lvmcmd");
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| 165 | while (<LVM>) {
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| 166 | if (/LVM version/) {
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| 167 | $lvmver = $_;
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| 168 | $lvmver =~ s/LVM version ([0-9])\..*/$1/;
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| 169 | }
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| 170 | }
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| 171 | close(LVM);
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| 172 | }
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| 173 | }
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| 174 |
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| 175 | if ($lvmver = 0) {
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| 176 | # Still not found
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| 177 | mr_exit(-1,"Unable to determine LVM version.\nPlease report to the dev team with the result of the commands\n$lvmds and $lvmvmd version");
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| 178 | } elsif ($lvmver = 1) {
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| 179 | $lvmcmd = "";
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| 180 | }
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| 181 | pb_log(0,"Found LVM version $lvmver");
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| 182 |
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| 183 | # For the moment on stdout
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| 184 | OUTPUT = \*STDOUT;
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| 185 |
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| 186 | # Generate the startup scrit on the fly needed to restore LVM conf
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| 187 | print OUTPUT "# Desactivate Volume Groups\n";
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| 188 | print OUTPUT "$lvmcmd vgchange -an\n";
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| 189 | print OUTPUT "\n";
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| 190 |
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| 191 | # Analyze the existing physical volumes
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| 192 | my @lvmpvs = ();
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| 193 | open(LVM,"$lvmcmd pvdisplay |") || mr_exit(-1,"Unable to execute $lvmcmd pvdisplay");
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| 194 | while (<LVM>) {
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| 195 | if (/PV Name/) {
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| 196 | my $lvmpv = $_;
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| 197 | $lvmpv =~ s/^\s*PV Name ([A-z0-9/])/$1/;
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| 198 | }
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| 199 | push($lvmpv,@lvmpvs);
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| 200 | }
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| 201 | close(LVM);
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| 202 |
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| 203 | ListAllPhysicalVolumes() {
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| 204 | if [ $lvmversion = 2 ]; then
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| 205 | $LVMCMD pvscan 2> /dev/null | grep 'PV' | awk '{print $2}'
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| 206 | else
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| 207 | pvscan 2> /dev/null | grep '"' | cut -d'"' -f2
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| 208 | fi
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| 209 | }
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| 210 | print OUTPUT "# Creating Physical Volumes\n";
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| 211 | foreach my $pv (@lvmpvs) {
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| 212 | print OUTPUT "echo y | $lvmcmd pvcreate -ff $pv\n";
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| 213 | }
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| 214 | print OUTPUT "\n";
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| 215 |
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| 216 | print OUTPUT "# Scanning again Volume Groups\n";
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| 217 | print OUTPUT "$lvmcmd vgscan\n";
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| 218 | print OUTPUT "\n";
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| 219 |
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| 220 | # Analyze the existing volume groups
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| 221 | print OUTPUT "# Creating Volume Groups and Activating them\n";
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| 222 | my @lvmvgs = ();
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| 223 | open(LVM,"$lvmcmd vgdisplay |") || mr_exit(-1,"Unable to execute $lvmcmd vgdisplay");
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| 224 | while (<LVM>) {
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| 225 | if (/VG Name/) {
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| 226 | my $lvmvg = $_;
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| 227 | $lvmvg =~ s/^\s*VG Name ([A-z0-9/])/$1/;
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| 228 | #$LVMCMD vgdisplay 2> /dev/null | awk '/^ *VG Name/ {print $3;}'
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| 229 | }
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| 230 | push($lvmvg,@lvmvgs);
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| 231 | }
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| 232 | close(LVM);
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| 233 |
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| 234 | foreach my $vg (@lvmvgs) {
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| 235 | if ($lvmver < 2) {
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| 236 | print OUTPUT "# Removing device first as LVM v1 doesn't do it\n";
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| 237 | print OUTPUT "rm -Rf /dev/$vg\n";
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| 238 | }
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| 239 | mr_lvm_create_vg($vg);
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| 240 | }
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| 241 |
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| 242 | sub mr_lvm_create_vg {
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| 243 |
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| 244 | my $vg = shift;
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| 245 |
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| 246 | $vg_params=`GenerateVgcreateParameters $vg`
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| 247 | GenerateVgcreateParameters() {
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| 248 | local current_VG device fname incoming VG_info_file max_logical_volumes max_physical_volumes physical_extent_size output blanklines
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| 249 | current_VG=$1
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| 250 | VG_info_file=$MINDI_TMP/$$.vg-info.txt
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| 251 | $LVMCMD vgdisplay $current_VG > $VG_info_file
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| 252 | max_logical_volumes=`GetValueFromField "$VG_info_file" "MAX LV"`
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| 253 | [ $max_logical_volumes -ge 256 ] && max_logical_volumes=255
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| 254 | max_physical_volumes=`GetValueFromField "$VG_info_file" "MAX PV"`
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| 255 | [ $max_physical_volumes -ge 256 ] && max_physical_volumes=255
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| 256 | physical_extent_size=`GetValueFromField "$VG_info_file" "PE Size"`
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| 257 | output=""
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| 258 | [ "$max_logical_volumes" ] && output="$output -l $max_logical_volumes"
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| 259 | [ "$max_physical_volumes" ] && output="$output -p $max_physical_volumes"
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| 260 | [ "$physical_extent_size" ] && output="$output -s $physical_extent_size"
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| 261 | echo "$output"
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| 262 | rm -f $VG_info_file
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| 263 | }
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| 264 |
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| 265 |
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| 266 | if ($lvmver = 1) {
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| 267 | $info_file = "/proc/lvm/VGs/$vg/group";
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| 268 | $pvs=`ls /proc/lvm/VGs/$vg/PVs`
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| 269 | $list_of_devices=""
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| 270 | for i in $pvs ; do
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| 271 | fname=/proc/lvm/VGs/$vg/PVs/$i
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| 272 | device=`GetValueFromField $fname "name:"`
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| 273 | $list_of_devices="$list_of_devices $device"
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| 274 | done
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| 275 | } elsif ($lvmver = 2) {
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| 276 | $list_of_devices=`$lvmcmd pvs | grep " $vg " | awk '{print $1}'`
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| 277 | }
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| 278 | print OUTPUT "# Create Volume Group $vg\n";
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| 279 | print OUTPUT "$lvmcmd vgcreate $vg $vg_param $list_of_devices\n";
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| 280 | print OUTPUT "# Activate Volume Group $vg\n";
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| 281 | print OUTPUT "$lvmcmd vgchnge -a y $vg\n";
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| 282 | }
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| 283 |
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| 284 | echo "Finally, create the LV's (logical volumes)."
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| 285 | all_logical_volumes=`ListAllLogicalVolumes`
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| 286 | for current_LV in $all_logical_volumes ; do
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| 287 | ProcessLogicalVolume $current_LV
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| 288 | done
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| 289 | echo ""
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| 290 | echo "# $LVMCMD vgscan"
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| 291 | echo "Now you may format the LV's:-"
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| 292 | for i in `ListAllLogicalVolumes` ; do
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| 293 | echo "(mkfs -t foo $i or something like that)"
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| 294 | done
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| 295 | WriteShutdownScript
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| 296 | exit 0
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| 297 |
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| 298 |
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| 299 | GetValueFromField() {
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| 300 | local res
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| 301 | 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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| 302 | }
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| 303 |
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| 304 |
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| 305 | GetLastBit() {
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| 306 | local i res
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| 307 | i=20
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| 308 | res=""
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| 309 | while [ ! "$res" ] ; do
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| 310 | i=$(($i-1))
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| 311 | res=`echo "$1" | cut -d'/' -f$i`
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| 312 | done
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| 313 | echo "$res"
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| 314 | }
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| 315 |
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| 316 |
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| 317 | ProcessLogicalVolume() {
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| 318 | local LV_full_string fname logical_volume volume_group device
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| 319 | LV_full_string=$1
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| 320 | [ ! -e "$1" ] && Die "Cannot find LV file $1"
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| 321 | volume_group=`echo "$LV_full_string" | cut -d'/' -f3`
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| 322 | logical_volume=`echo "$LV_full_string" | cut -d'/' -f4`
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| 323 | if [ $lvmversion = 2 ]; then
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| 324 | device=$LV_full_string
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| 325 | params=`GenerateLvcreateParameters $device`
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| 326 | else
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| 327 | fname=/proc/lvm/VGs/$volume_group/LVs/$logical_volume
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| 328 | if [ ! -e "$fname" ] ; then
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| 329 | echo "Warning - cannot find $volume_group's $logical_volume LV file"
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| 330 | else
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| 331 | device=`GetValueFromField $fname "name:"`
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| 332 | params=`GenerateLvcreateParameters $device`
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| 333 | fi
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| 334 | fi
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| 335 | echo "# $LVMCMD lvcreate$params -n $logical_volume $volume_group"
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| 336 | }
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| 337 |
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| 338 |
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| 339 | GenerateLvcreateParameters() {
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| 340 | local device stripes stripesize device fname allocation output readahead
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| 341 | fname=$MINDI_TMP/PLF.$$.txt
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| 342 | device=$1
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| 343 | output=""
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| 344 | $LVMCMD lvdisplay $device > $fname
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| 345 | stripes=`GetValueFromField $fname "Stripes"`
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| 346 | stripesize=`GetValueFromField $fname "Stripe size (MByte)"`m
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| 347 | [ "$stripesize" = "m" ] && stripesize=`GetValueFromField $fname "Stripe size (KByte)"`k
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| 348 | [ "$stripesize" = "k" ] && stripesize=""
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| 349 | allocation=`GetValueFromField $fname "LV Size"`
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| 350 | [ ! "`echo "$allocation" | grep "[k,m,g]"`" ] && allocation="$allocation"m
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| 351 | if echo "$allocation" | grep -E '^.*g$' > /dev/null 2> /dev/null ; then
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| 352 | val=`echo "$allocation" | sed s/g//`
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| 353 | allocation=`echo "$val" | awk '{c=$1; printf "%d", c*1024;}'`m
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| 354 | fi
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| 355 | readahead=`GetValueFromField $fname "Read ahead sectors"`
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| 356 | rm -f $fname
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| 357 | [ "$stripes" ] && output="$output -i $stripes"
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| 358 | [ "$stripesize" ] && output="$output -I $stripesize"
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| 359 | [ "$allocation" ] && output="$output -L $allocation"
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| 360 | [ "$readahead" ] && output="$output -r $readahead"
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| 361 | echo "$output"
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| 362 | }
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| 363 |
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| 364 |
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| 365 |
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| 366 |
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| 367 |
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| 368 |
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| 369 | ListAllLogicalVolumes() {
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| 370 | if [ $lvmversion = 2 ]; then
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| 371 | $LVMCMD lvscan 2> /dev/null | grep "'" | cut -d"'" -f2
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| 372 | else
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| 373 | lvscan 2> /dev/null | grep '"' | cut -d'"' -f2
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| 374 | fi
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| 375 | }
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| 376 |
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| 377 |
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| 378 |
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| 379 | WriteShutdownScript() {
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| 380 | local i
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| 381 | echo ""
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| 382 | echo "Finally, to shut down and delete the volumes, do this:-"
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| 383 | for i in `ListAllLogicalVolumes` ; do
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| 384 | echo "($LVMCMD lvremove -f $i)"
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| 385 | done
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| 386 | for i in `ListAllVolumeGroups` ; do
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| 387 | echo "($LVMCMD vgchange -a n $i)"
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| 388 | done
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| 389 | for i in `ListAllVolumeGroups` ; do
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| 390 | echo "($LVMCMD vgremove $i)"
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| 391 | done
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| 392 | if [ $lvmversion = 2 ]; then
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| 393 | echo "(rmmod dm-mod & rmmod dm_mod & )"
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| 394 | else
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| 395 | echo "(rmmod lvm-mod)"
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| 396 | fi
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| 397 | }
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| 398 |
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| 399 |
|
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| 400 |
|
|---|
