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#!/usr/bin/perl -w |
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|
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use strict; |
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use Shell qw/rsync vzlist lvcreate mount umount lvremove which lvdisplay mke2fs vzctl/; |
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|
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my $vz = '/vz'; |
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my $conf = '/etc/vz/conf'; |
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|
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my $snap_size = '10G'; |
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|
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my ( $action, $VEID ) = @ARGV; |
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|
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my $use_snapshot = 1; |
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|
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my $valid_actions = 'create|mount|umount|destroy'; |
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|
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die "Usage: $0 ($valid_actions) VEID\n\n",vzlist unless $VEID && $action && $action =~ m/($valid_actions)/; |
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|
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my $CVEID = "10$VEID"; |
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|
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sub vzctl_stop { |
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my $veid = shift; |
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my $vzlist = vzlist(); |
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if ( $vzlist =~ m/$veid/ ) { |
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print "stop $veid\n"; |
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vzctl('stop', $veid); |
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} |
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} |
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|
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if ( $action eq 'create' ) { |
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vzctl_stop( $CVEID ); |
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} elsif ( $action eq 'destroy' ) { |
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vzctl_stop( $VEID ); |
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} |
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|
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|
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if ( $action =~ m{(create|umount|destroy)} ) { |
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my $clone; |
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my $snap; |
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open(my $m, '-|', 'mount') || die "can't open mount: $!"; |
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while(<$m>) { |
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my @v = split(/\s+/,$_); |
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if ( $v[2] =~ m{/(private|root)/($VEID|$CVEID)$} && $v[5] =~ m{bind} ) { |
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umount( $v[2] ); |
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} elsif ( $v[2] =~ m{vz-clone-$CVEID$} ) { |
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$clone = $v[2]; |
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} elsif ( $v[2] =~ m{-snap} ) { |
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$snap = $v[0]; |
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umount( $snap ); |
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} |
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} |
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umount( $clone ) if $clone; |
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if ( $action eq 'destroy' && -e $snap ) { |
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lvremove( '-f', $snap ); |
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} |
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|
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vzctl('destroy', $VEID) if $action eq 'destroy'; |
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|
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exit if $action =~ m{(umount|destroy)}; |
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} |
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|
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|
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my $orig_conf = "/etc/vz/conf/$VEID.conf"; |
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|
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die "$VEID config $orig_conf doesn't exist\n" unless -e $orig_conf; |
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|
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print "Clone VE $VEID -> $CVEID\n"; |
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|
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my $vz_lv; |
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|
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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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warn "found LV $vz_lv for $vz\n"; |
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last; |
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} |
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} |
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|
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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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|
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sub copy_files { |
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my ( $from, $to ) = @_; |
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return if $action ne 'create'; |
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warn "rsync $from -> $to\n"; |
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rsync('-raSHAD', '--delete', "$from/", "$to/" ); |
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} |
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|
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if ( $vz_lv ) { |
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|
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my ( $vz_lv_path, $vz_lv_name ) = ( $1, $2 ) if ( $vz_lv =~ m{^(.+)/([^/]+)$} ); |
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|
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my $snap = $vz_lv_name . '-snap'; |
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my $clone = "vz-clone-$CVEID"; |
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|
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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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|
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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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|
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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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|
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if ( $use_snapshot ) { |
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|
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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, $vz_lv ); |
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|
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do_mount( "$vz_lv_path/$snap", "/tmp/$snap" ); |
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|
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mount_bind( "/tmp/$snap/private/$VEID", "$vz/private/$CVEID" ); |
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mount_bind( "/tmp/$snap/root/$VEID", "$vz/root/$CVEID" ); |
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|
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} else { |
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|
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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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my $vg_name = $1 if ( $vz_lv_path =~ m{/([^/]+)/*$} ); |
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my $clone_size = fs_quota( $VEID ) . 'k'; |
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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/$clone" ); |
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} |
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|
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do_mount( "$vz_lv_path/$clone", "/tmp/$clone" ); |
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|
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test_mkdir( "/tmp/$clone/private" ); |
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test_mkdir( "/tmp/$clone/root" ); |
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|
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copy_files( "$vz/private/$VEID", "/tmp/$clone/private" ); |
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|
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mount_bind( "/tmp/$clone/private", "$vz/private/$CVEID" ); |
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mount_bind( "/tmp/$clone/root", "$vz/root/$CVEID" ); |
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|
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} |
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|
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} else { |
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|
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copy_files( "$vz/private/$VEID", "$vz/private/$CVEID" ); |
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} |
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exit if $action eq 'mount'; |
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|
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my $note = "# modified by $0\n"; |
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|
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my $ve_clone_ip; |
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|
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sub fix_ip { |
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my $ip = shift; |
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$ip =~ s/['"]//g; |
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# $ip =~ s/^\d+\./10./; |
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$ip =~ s/^\d+\.\d+\./192.168./; |
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warn "$CVEID new IP number: $ip\n"; |
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$ve_clone_ip = $ip; |
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return $note . qq{IP_ADDRESS="$ip"}; |
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} |
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|
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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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|
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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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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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print $n $_; |
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} |
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|
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print $n qq{DISK_QUOTA="no"\n} if $use_snapshot; # don't wait for quota rebuild on startup |
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|
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my $iptables="iptables -t nat -A POSTROUTING -s $ve_clone_ip -o eth0 -j MASQUERADE"; |
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system( $iptables ); |
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print "\nConfig file: $conf/$CVEID.conf\nAdded NAT for new VE with: $iptables\nStart clone of $VEID with: vzctl start $CVEID\n" |
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