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dpavlin |
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#!/usr/bin/perl -w |
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use strict; |
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dpavlin |
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use Shell qw/rsync vzlist lvcreate mount umount lvremove which lvdisplay mke2fs/; |
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dpavlin |
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my $vz = '/vz'; |
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my $conf = '/etc/vz/conf'; |
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dpavlin |
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my $snap_size = '100M'; |
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dpavlin |
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my $VEID = shift @ARGV || die "Usage: $0 VEID\n\n",vzlist; |
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dpavlin |
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my $CVEID = "10$VEID"; |
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dpavlin |
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my $orig_conf = "/etc/vz/conf/$VEID.conf"; |
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die "$VEID config $orig_conf doesn't exist\n" unless -e $orig_conf; |
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print "Clone VE $VEID -> $CVEID\n"; |
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dpavlin |
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my $vz_lv; |
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dpavlin |
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dpavlin |
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open(my $m, '<', '/etc/fstab') || die "can't open /etc/fstab: $!"; |
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while(<$m>) { |
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next if m/^#/; |
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my @v = split(/\s+/,$_); |
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if ( $v[1] =~ m/\Q$vz\E/ ) { |
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$vz_lv = $v[0]; |
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dpavlin |
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warn "found LV $vz_lv for $vz\n"; |
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dpavlin |
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last; |
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} |
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} |
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dpavlin |
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sub fs_quota { |
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my $id = shift; |
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open(my $q, '-|', "vzquota -b show $id") || die "can't exec vzquota show $id: $!"; |
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my $l = <$q>; |
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$l =~ s/^\s+//; |
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my ( $usage, $soft, $hard ) = split(/\s+/,$l); |
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warn "quota for $id | $soft < $hard | usage: $usage\n"; |
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return ( $usage, $soft, $hard ) if wantarray; |
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return $soft; |
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} |
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dpavlin |
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sub copy_files { |
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my ( $from, $to ) = @_; |
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dpavlin |
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warn "rsync $from -> $to\n"; |
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rsync('-raSHAD', "$from/", "$to/" ); |
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dpavlin |
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} |
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if ( $vz_lv ) { |
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my ( $vz_lv_path, $vz_lv_name ) = ( $1, $2 ) if ( $vz_lv =~ m!^(.+)/([^/]+)$! ); |
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my $snap = $vz_lv_name . '-snap'; |
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dpavlin |
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my $clone = "$vz_lv_name-clone-$CVEID"; |
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sub do_mount { |
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my ( $from, $to ) = @_; |
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mkdir $to || die "can't create $to: $!"; |
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print "Mounting $from to $to\n"; |
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mount( $from, $to, '-o', 'noatime' ); |
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} |
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sub test_mkdir { |
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my $dir = shift; |
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if ( ! -d $dir ) { |
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mkdir $dir || die "can't mkdir $dir: $!"; |
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} |
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} |
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sub mount_bind { |
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my ( $from, $to ) = @_; |
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die "$from doesn't exist!" unless -d $from; |
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test_mkdir( $to ); |
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mount( '--bind', $from, $to ); |
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} |
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dpavlin |
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print "Creating $snap_size snapshot $snap from $vz_lv\n"; |
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lvcreate( '--size', $snap_size, '--snapshot', '--name', $snap, $vz_lv ); |
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dpavlin |
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do_mount( "$vz_lv_path/$snap", "/tmp/$snap" ); |
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dpavlin |
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dpavlin |
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my $clone_size = fs_quota( $VEID ) . 'k'; |
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my $vg_name = $1 if ( $vz_lv_path =~ m!/([^/]+)/*$! ); |
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dpavlin |
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dpavlin |
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if ( lvdisplay( "$vz_lv_path/$clone" ) ) { |
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warn "using existing $vz_lv_path/$clone\n"; |
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} else { |
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print "Creating LV $clone ($clone_size bytes) in VG $vg_name for $VEID clone filesystem\n"; |
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lvcreate( '--size', $clone_size, '--name', $clone, $vg_name ); |
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mke2fs( '-m', 0, '-j', "$vz_lv_path/$clone" ); |
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} |
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dpavlin |
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do_mount( "$vz_lv_path/$clone", "/tmp/$clone" ); |
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dpavlin |
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dpavlin |
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test_mkdir( "/tmp/$clone/private" ); |
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test_mkdir( "/tmp/$clone/root" ); |
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dpavlin |
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dpavlin |
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mount_bind( "/tmp/$clone/private", "$vz/private/$CVEID" ); |
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mount_bind( "/tmp/$clone/root", "$vz/root/$CVEID" ); |
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dpavlin |
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dpavlin |
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copy_files( "/tmp/$snap/private/$VEID", "$vz/private/$CVEID" ); |
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print "Cleanup\n"; |
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dpavlin |
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#umount( "$vz_lv_path/$clone" ); |
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dpavlin |
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umount( "$vz_lv_path/$snap" ); |
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dpavlin |
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lvremove( '-f', "$vz_lv_path/$snap" ); |
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} else { |
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copy_files( "$vz/private/$VEID", "$vz/private/$CVEID" ); |
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} |
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my $note = "# modified by $0\n"; |
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dpavlin |
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sub fix_ip { |
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my $ip = shift; |
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dpavlin |
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$ip =~ s/['"]//g; |
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dpavlin |
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$ip =~ s/^\d+\./10./; |
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warn "$CVEID new IP number: $ip\n"; |
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dpavlin |
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return $note . qq{IP_ADDRESS="$ip"}; |
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dpavlin |
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} |
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dpavlin |
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sub fix_hostname { |
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my $hostname = shift; |
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$hostname =~ s/['"]//g; |
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$hostname = "clone-$hostname"; |
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warn "$CVEID new hostname: $hostname\n"; |
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return $note . qq{HOSTNAME="$hostname"}; |
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} |
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dpavlin |
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open(my $o, '<', "$conf/$VEID.conf") || die "can't open $conf/$VEID.conf: $!"; |
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open(my $n, '>', "$conf/$CVEID.conf") || die "can't open $conf/$CVEID.conf: $!"; |
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while(<$o>) { |
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dpavlin |
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s!^HOSTNAME=(.*)$!fix_hostname($1)!ie; |
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s!^IP_ADDRESS=(.*)$!fix_ip($1)!ie; |
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s!^(ONBOOT=).*$!# modified by $0\n$1"no"!i; |
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dpavlin |
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print $n $_; |
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} |
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dpavlin |
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print "\nPlease review config file: $conf/$CVEID.conf\nAdd NAT for new VE with: iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE\nStart clone of $VEID with: vzctl start $CVEID\n" |