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# Copyright (c) 2006, 2007 - OpenSLX GmbH
#
# This program is free software distributed under the GPL version 2.
# See http://openslx.org/COPYING
#
# If you have any feedback please consult http://openslx.org/feedback and
# send your suggestions, praise, or complaints to feedback@openslx.org
#
# General information about OpenSLX can be found at http://openslx.org/
# -----------------------------------------------------------------------------
# NFS.pm
# - provides NFS-specific overrides of the OpenSLX::OSExport::FileSystem API.
# -----------------------------------------------------------------------------
package OpenSLX::OSExport::FileSystem::NFS;
use strict;
use warnings;
use base qw(OpenSLX::OSExport::FileSystem::Base);
use File::Basename;
use OpenSLX::Basics;
use OpenSLX::ConfigDB qw(:support);
use OpenSLX::Utils;
################################################################################
### interface methods
################################################################################
sub new
{
my $class = shift;
my $self = {
'name' => 'nfs',
};
return bless $self, $class;
}
sub initialize
{
my $self = shift;
my $engine = shift;
$self->{'engine'} = $engine;
my $exportBasePath = "$openslxConfig{'public-path'}/export";
$self->{'export-path'} = "$exportBasePath/nfs/$engine->{'vendor-os-name'}";
return;
}
sub exportVendorOS
{
my $self = shift;
my $source = shift;
my $target = $self->{'export-path'};
$self->_copyViaRsync($source, $target);
return;
}
sub purgeExport
{
my $self = shift;
my $target = $self->{'export-path'};
if (system("rm -r $target")) {
vlog(0, _tr("unable to remove export '%s'!", $target));
return 0;
}
return 1;
}
sub checkRequirements
{
my $self = shift;
my $vendorOSPath = shift;
# determine most appropriate kernel version ...
my $kernelVer = $self->_pickKernelVersion($vendorOSPath);
# ... and check if that kernel-version provides all the required modules
my $nfsMod = $self->_locateKernelModule(
$vendorOSPath,
'nfs.ko',
[
"$vendorOSPath/lib/modules/$kernelVer/kernel/fs/nfs",
"$vendorOSPath/lib/modules/$kernelVer/kernel/fs"
]
);
if (!defined $nfsMod) {
warn _tr("unable to find nfs-module for kernel version '%s'.",
$kernelVer);
return;
}
return 1;
}
sub generateExportURI
{
my $self = shift;
my $export = shift;
my $vendorOS = shift;
my $serverIP = $export->{server_ip} || '';
my $server
= length($serverIP) ? $serverIP : generatePlaceholderFor('serverip');
my $port = $export->{port} || '';
$server .= ":$port" if length($port);
my $exportPath = "$openslxConfig{'public-path'}/export";
return "nfs://$server$exportPath/nfs/$vendorOS->{name}";
}
sub requiredFSMods
{
my $self = shift;
return qw( nfs );
}
sub showExportConfigInfo
{
my $self = shift;
my $export = shift;
print (('#' x 80)."\n");
print _tr("Please make sure the following line is contained in /etc/exports\nin order to activate the NFS-export of this vendor-OS:\n\t%s\n",
"$self->{'export-path'}\t*(ro,no_root_squash,async,no_subtree_check)");
print (('#' x 80)."\n");
# TODO : add something a bit more clever here...
# my $exports = slurpFile("/etc/exports");
return;
}
################################################################################
### implementation methods
################################################################################
sub _copyViaRsync
{
my $self = shift;
my $source = shift;
my $target = shift;
if (system("mkdir -p $target")) {
die _tr("unable to create directory '%s', giving up! (%s)\n",
$target, $!);
}
my $includeExcludeList = $self->_determineIncludeExcludeList();
vlog(1, _tr("using include-exclude-filter:\n%s\n", $includeExcludeList));
my $rsyncFH;
my $additionalRsyncOptions = $ENV{SLX_RSYNC_OPTIONS} || '';
my $rsyncCmd
= "rsync -av --delete-excluded --exclude-from=- $additionalRsyncOptions"
. " $source/ $target";
vlog(2, "executing: $rsyncCmd\n");
open($rsyncFH, '|-', $rsyncCmd)
or die _tr("unable to start rsync for source '%s', giving up! (%s)",
$source, $!);
print $rsyncFH $includeExcludeList;
close($rsyncFH)
or die _tr("unable to export to target '%s', giving up! (%s)",
$target, $!);
return;
}
sub _determineIncludeExcludeList
{
my $self = shift;
# Rsync uses a first match strategy, so we mix the local specifications
# in front of the filterset given by the package (as the local filters
# should always overrule the vendor filters):
my $distroName = $self->{engine}->{'distro-name'};
my $localFilterFile
= "$openslxConfig{'config-path'}/distro-info/$distroName/export-filter";
my $includeExcludeList
= slurpFile($localFilterFile, { failIfMissing => 0 });
$includeExcludeList .= $self->{engine}->{distro}->{'export-filter'};
$includeExcludeList =~ s[^\s+][]igms;
# remove any leading whitespace, as rsync doesn't like it
return $includeExcludeList;
}
1;
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