GeniAggregate.pm.in 51 KB
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#!/usr/bin/perl -wT
#
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# GENIPUBLIC-COPYRIGHT
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# Copyright (c) 2008-2012 University of Utah and the Flux Group.
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# All rights reserved.
#
package GeniAggregate;

#
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# Some simple aggregate stuff.
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#
use strict;
use Exporter;
use vars qw(@ISA @EXPORT);

@ISA    = "Exporter";
@EXPORT = qw ( );

# Must come after package declaration!
use GeniDB;
use GeniCredential;
use GeniCertificate;
use GeniSliver;
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use GeniSlice;
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use GeniRegistry;
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use GeniUtil;
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use GeniUser;
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use GeniComponent;
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use GeniHRN;
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use GeniXML;
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use emutil;
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use Data::Dumper;
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use English;
use overload ('""' => 'Stringify');
use XML::Simple;
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use POSIX qw(strftime);
use Time::Local;
use Date::Parse;
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# Configure variables
my $TB		   = "@prefix@";
my $TBOPS          = "@TBOPSEMAIL@";
my $TBAPPROVAL     = "@TBAPPROVALEMAIL@";
my $TBAUDIT   	   = "@TBAUDITEMAIL@";
my $BOSSNODE       = "@BOSSNODE@";
my $OURDOMAIN      = "@OURDOMAIN@";
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my $PGENIDOMAIN    = "@PROTOGENI_DOMAIN@";
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my $SIGNCRED	   = "$TB/sbin/signgenicred";
my $VERIFYCRED	   = "$TB/sbin/verifygenicred";
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my $NODEREBOOT	   = "$TB/bin/node_reboot";
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my $EVENTSYS	   = "$TB/bin/eventsys_control";
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my $VNODESETUP     = "$TB/sbin/vnode_setup";
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my $POWER          = "$TB/bin/power";
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my $OSLOAD         = "$TB/bin/os_load";
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my $SNMPIT         = "$TB/bin/snmpit_test";
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my $NAMEDSETUP     = "$TB/sbin/named_setup";
my $EXPORTS_SETUP  = "$TB/sbin/exports_setup";
my $GENTOPOFILE    = "$TB/libexec/gentopofile";
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# Cache of instances to avoid regenerating them.
my %aggregates     = ();
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BEGIN { use GeniUtil; GeniUtil::AddCache(\%aggregates); }
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#
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# Lookup by URN, idx, or uuid.
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#
sub Lookup($$)
{
    my ($class, $token) = @_;
    my $query_result;
    my $idx;

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    if (GeniHRN::IsValid($token)) {
	my ($authority, $type, $id) = GeniHRN::Parse($token);
	return undef if $type ne "sliver";
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	if( GeniHRN::Authoritative($token, "@OURDOMAIN@") ) {
	    # Very simple: we put the index of our own aggregates right
	    # in the name.
	    $idx = $id;
	} else {
	    # Look up the aggregate's certificate.
	    $token = GeniHRN::Normalise( $token );
	    $query_result = DBQueryWarn(
		"SELECT geni_aggregates.idx FROM geni_aggregates, " .
		"geni_certificates WHERE geni_aggregates.uuid = " .
		"geni_certificates.uuid AND " .
		"geni_certificates.urn='$token';" );

	    return undef if (! $query_result || !$query_result->numrows);

	    ($idx) = $query_result->fetchrow_array();
	}
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    }
    elsif ($token =~ /^\d+$/) {
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	$idx = $token;
    }
    elsif ($token =~ /^\w+\-\w+\-\w+\-\w+\-\w+$/) {
	$query_result =
	    DBQueryWarn("select idx from geni_aggregates ".
			"where uuid='$token'");
	    return undef
		if (! $query_result || !$query_result->numrows);

	    ($idx) = $query_result->fetchrow_array();
    }
    else {
	return undef;
    }
    # Look in cache first
    return $aggregates{"$idx"}
        if (exists($aggregates{"$idx"}));

    $query_result =
	DBQueryWarn("select * from geni_aggregates where idx='$idx'");
    
    return undef
	if (!$query_result || !$query_result->numrows);

    my $self              = {};
    $self->{'AGGREGATE'}  = $query_result->fetchrow_hashref();
    $self->{'CREDENTIAL'} = undef;
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    $self->{'SLICE'}      = undef;
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    $self->{'PARENT'}     = undef;
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    # Bless into sub package if called for.
    my $type = $self->{'AGGREGATE'}->{'type'};
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    if (defined($type) && $type ne "" && $type ne "Aggregate") {
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	bless($self, $class . "::" . $type);
    }
    else {
	bless($self, $class);
    }
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    #
    # Grab the certificate, since we will probably want it.
    #
    my $uuid = $self->{'AGGREGATE'}->{'uuid'};
    my $certificate = GeniCertificate->Lookup($uuid);
    if (!defined($certificate)) {
	print STDERR "Could not find certificate for aggregate $idx ($uuid)\n";
	return undef;
    }
    $self->{'CERTIFICATE'} = $certificate;
    
    # Add to cache. 
    $aggregates{$self->{'AGGREGATE'}->{'idx'}} = $self;
    
    return $self;
}

#
# Stringify for output.
#
sub Stringify($)
{
    my ($self) = @_;
    
    my $uuid = $self->uuid();
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    my $hrn  = $self->hrn();
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    my $idx  = $self->idx();

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    return "[GeniAggregate: $hrn, IDX: $idx]";
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}

#
# Create a Geni aggregate in the DB. This happens on the server side only
# for now. The client side does not actually know its an aggregate, at
# least not yet.
#
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sub Create($$$$$$)
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{
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    my ($class, $slice, $owner, $aggregate_type, $hrn, $nickname) = @_;
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    my @insert_data = ();

    # Every aggregate gets a new unique index.
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    my $idx = TBGetUniqueIndex('next_sliver', 1);
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    # Create a cert pair, which gives us a new uuid.
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    my $urn = GeniHRN::Generate( "@OURDOMAIN@", "sliver", $idx );
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    my $certificate = GeniCertificate->Create({'urn'   => $urn,
					       'hrn'   => $hrn,
					       'email' => $TBOPS});
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    if (!defined($certificate)) {
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	print STDERR "GeniAggregate::Create: ".
	    "Could not generate new certificate and UUID for $hrn\n";
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	return undef;
    }
    my $uuid        = $certificate->uuid();
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    my $slice_uuid  = $slice->uuid();
    my $owner_uuid  = $owner->uuid();
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    $aggregate_type = "Aggregate"
    	if (! defined($aggregate_type));

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    # Now tack on other stuff we need.
    push(@insert_data, "created=now()");
    push(@insert_data, "idx='$idx'");
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    push(@insert_data, "hrn=" . DBQuoteSpecial($hrn));
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    push(@insert_data, "nickname=" . DBQuoteSpecial($nickname));
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    push(@insert_data, "uuid='$uuid'");
    push(@insert_data, "creator_uuid='$owner_uuid'");
    push(@insert_data, "slice_uuid='$slice_uuid'");
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    push(@insert_data, "type='$aggregate_type'");
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    # Start out new aggregates, as new.
    push(@insert_data, "state='new'");
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    # Insert into DB.
    if (!DBQueryWarn("insert into geni_aggregates set " .
		     join(",", @insert_data))) {
	$certificate->Delete();
	return undef;
    }
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    my $aggregate = GeniAggregate->Lookup($idx);
    return undef
	if (!defined($aggregate));

    return $aggregate;
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}
# accessors
sub field($$) { return ((! ref($_[0])) ? -1 : $_[0]->{'AGGREGATE'}->{$_[1]}); }
sub idx($)		{ return field($_[0], "idx"); }
sub uuid($)		{ return field($_[0], "uuid"); }
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sub nickname($)		{ return field($_[0], "nickname"); }
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sub resource_id($)      { return $_[0]->nickname(); }
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sub type($)		{ return field($_[0], "type"); }
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sub slice_uuid($)	{ return field($_[0], "slice_uuid"); }
sub creator_uuid($)	{ return field($_[0], "creator_uuid"); }
sub created($)		{ return field($_[0], "created"); }
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sub registered($)	{ return field($_[0], "registered"); }
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sub credential_idx($)	{ return field($_[0], "credential_idx"); }
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sub aggregate_idx($)	{ return field($_[0], "aggregate_idx"); }
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sub status($)		{ return field($_[0], "status"); }
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sub state($)		{ return field($_[0], "state"); }
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sub ErrorLog($)		{ return field($_[0], "errorlog"); }
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sub cert($)		{ return $_[0]->{'CERTIFICATE'}->cert(); }
sub GetCertificate($)   { return $_[0]->{'CERTIFICATE'}; }

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# An alias so that slivers look like aggregates.
sub resource_type($)	{ return field($_[0], "type"); }

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# A place to stash a temporary rspec.
sub rspec($;$)
{
    my ($self, $rspec) = @_;

    if (defined($rspec)) {
	$self->{'RSPEC'} = $rspec;
    }
    return $self->{'RSPEC'};
}

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# Return the URN.
sub urn($)
{
    my ($self) = @_;

    return GeniHRN::Generate("@OURDOMAIN@", "sliver", $self->idx());
}
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# Name compat.
sub sliver_urn($)	{ return $_[0]->urn(); }
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#
# Destroy all the slivers in the aggregate, and then the aggregate if there
# is nothing in it. Leave it around if something goes wrong.
#
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sub Delete($$)
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{
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    my ($self, $purge) = @_;
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    my $broken = 0;

    return -1
	if (! ref($self));

    my @slivers = ();
    if ($self->SliverList(\@slivers) != 0) {
	print STDERR "Could not get sliver list for $self\n";
	return -1;
    }
    foreach my $sliver (@slivers) {
	if ($sliver->status() eq "broken") {
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	    print STDERR "Could not delete 'broken' $sliver from $self\n";
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	    $broken++;
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	    last;
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	}
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	if ($sliver->Delete($purge) != 0) {
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	    print STDERR "Could not delete $sliver from $self\n";
	    $sliver->SetStatus("broken");
	    $broken++;
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	    last;
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	}
    }
    return -1
	if ($broken);
    
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    if (GeniUsage->DestroyAggregate($self, $purge)) {
	print STDERR "GeniAggregate::Delete: ".
	    "GeniUsage->DestroyAggregate($self) failed\n";
    }
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    my $idx  = $self->idx();
    my $uuid = $self->uuid();

    DBQueryWarn("delete from geni_credentials where this_uuid='$uuid'")
	or return -1;
    DBQueryWarn("delete from geni_certificates where uuid='$uuid'")
	or return -1;
    DBQueryWarn("delete from geni_aggregates where idx='$idx'")
	or return -1;
    
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    # Delete from cache. 
    delete($aggregates{$idx});

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    return 0;
}

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#
# Cons up an hrn.
#
sub hrn($)
{
    my ($self) = @_;

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    my $hrn = field($self, "hrn");

    if (defined($hrn) && $hrn ne "") {
	return $hrn;
    }
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    return "${PGENIDOMAIN}.aggregate_" . $self->idx();
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}

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#
# Look up toplevel aggregate for a locally instantiated slice. 
#
sub SliceAggregate($$)
{
    my ($class, $slice) = @_;

    my $slice_uuid = $slice->uuid();
    my @result = ();

    my $query_result =
	DBQueryWarn("select idx from geni_aggregates ".
		    "where slice_uuid='$slice_uuid' and type='Aggregate'");
    return undef
	if (!$query_result);
    return undef
	if ($query_result->numrows != 1);

    my ($idx) = $query_result->fetchrow_array();
    my $aggregate = GeniAggregate->Lookup($idx);
    return undef
	if (!defined($aggregate));

    return $aggregate;
}

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#
# Look up a list of aggregates for a locally instantiated slice. 
# Used by the CM.
#
sub SliceAggregates($$$)
{
    my ($class, $slice, $pref) = @_;

    my $slice_uuid = $slice->uuid();
    my @result = ();

    my $query_result =
	DBQueryWarn("select idx from geni_aggregates ".
		    "where slice_uuid='$slice_uuid'");
    return -1
	if (!$query_result);

    while (my ($idx) = $query_result->fetchrow_array()) {
	my $aggregate = GeniAggregate->Lookup($idx);
	return -1
	    if (!defined($aggregate));
	push(@result, $aggregate);
    }
    @$pref = @result;
    return 0;
}

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#
# List of slivers for this aggregate.
#
sub SliverList($$)
{
    my ($self, $pref) = @_;
    my @result = ();
    
    return -1
	if (! (ref($self) && ref($pref)));

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    my $idx  = $self->idx();
    my $uuid = $self->uuid();
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    my $query_result =
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	DBQueryWarn("select idx from geni_slivers ".
		    "where aggregate_uuid='$uuid'");
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    return -1
	if (!$query_result);

    while (my ($sliver_idx) = $query_result->fetchrow_array()) {
	my $sliver = GeniSliver->Lookup($sliver_idx);
	if (!defined($sliver)) {
	    print STDERR "Could not find sliver object for $sliver_idx\n";
	    return -1;
	}
	push(@result, $sliver);
    }
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    #
    # And any aggregates that are children.
    #
    $query_result =
	DBQueryWarn("select idx from geni_aggregates ".
		    "where aggregate_idx='$idx'");
    return -1
	if (!$query_result);

    while (my ($aggregate_idx) = $query_result->fetchrow_array()) {
	my $aggregate = GeniAggregate->Lookup($aggregate_idx);
	if (!defined($aggregate_idx)) {
	    print STDERR
		"Could not find aggregate object for $aggregate_idx\n";
	    return -1;
	}
	push(@result, $aggregate);
    }
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    @$pref = @result;
    return 0;
    
}

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#
# Set the aggregate for an aggregate.
#
sub SetAggregate($$)
{
    my ($self, $aggregate) = @_;

    return -1
	if (! (ref($self) && ref($aggregate)));

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    my $idx      = $self->idx();
    my $agg_idx  = $aggregate->idx();
    my $agg_uuid = $aggregate->uuid();
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    return -1
	if (!DBQueryWarn("update geni_aggregates set ".
			 "  aggregate_idx='$agg_idx' ".
			 "where idx='$idx'"));
    
    $self->{'AGGREGATE'}->{'aggregate_idx'} = $agg_idx;
    $self->{'PARENT'} = $aggregate;
    return 0;
}

#
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# Get the aggregate for an aggregate.
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#
sub GetAggregate($)
{
    my ($self) = @_;

    return undef
	if (! ref($self));

    return $self->{'PARENT'} if (defined($self->{'PARENT'}));
    return undef
	if (!defined($self->aggregate_idx()));

    my $aggregate = GeniAggregate->Lookup($self->aggregate_idx());
    if (!defined($aggregate)) {
	print STDERR "Could not get aggregate object associated with $self\n";
	return undef;
    }
    $self->{'PARENT'} = $aggregate;
    return $aggregate;
}

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#
# Is object in the aggregate.
#
sub IsMember($$)
{
    my ($self, $object) = @_;

    return -1
	if (! (ref($self) && ref($object)));

    my $aggregate = $object->GetAggregate();
    return 0
	if (!$aggregate);
    return -1
	if ($self->idx() != $aggregate->idx());
    return 1;
}

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#
# Set the status for the aggregate
#
sub SetStatus($$)
{
    my ($self, $status) = @_;

    return undef
	if (! ref($self));

    my $idx = $self->idx();
    
    return -1
	if (!DBQueryWarn("update geni_aggregates set ".
			 "  status='$status' ".
			 "where idx='$idx'"));
    
    $self->{'AGGREGATE'}->{'status'} = $status;
    return 0;
}

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#
# Set the state for the aggregate
#
sub SetState($$)
{
    my ($self, $state) = @_;

    return undef
	if (! ref($self));

    my $idx = $self->idx();
    
    return -1
	if (!DBQueryWarn("update geni_aggregates set ".
			 "  state='$state' ".
			 "where idx='$idx'"));
    
    $self->{'AGGREGATE'}->{'state'} = $state;
    return 0;
}

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#
# And the ErrorLog. These are intended to be short ...
#
sub SetErrorLog($$)
{
    my ($self, $log) = @_;
    my $safe_log = DBQuoteSpecial($log);

    return undef
	if (! ref($self));

    my $idx = $self->idx();
    
    return -1
	if (!DBQueryWarn("update geni_aggregates set ".
			 "  errorlog=$safe_log ".
			 "where idx='$idx'"));
    
    $self->{'AGGREGATE'}->{'errorlog'} = $log;
    return 0;
}

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#
# Set the registered datetime for the aggregate
#
sub SetRegistered($$)
{
    my ($self, $yesno) = @_;

    return undef
	if (! ref($self));

    my $idx = $self->idx();
    my $val = ($yesno ? "now()" : "NULL");
    
    return -1
	if (!DBQueryWarn("update geni_aggregates set ".
			 "  registered=$val ".
			 "where idx='$idx'"));
    
    return 0;
}

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#
# Get the slice for the aggregate.
#
sub GetSlice($)
{
    my ($self) = @_;

    return undef
	if (! ref($self));

    return $self->{'SLICE'} if (defined($self->{'SLICE'}));

    if (!defined($self->slice_uuid())) {
	print STDERR "No slice associated with $self\n";
	return undef;
    }
    my $slice = GeniSlice->Lookup($self->slice_uuid());
    if (!defined($slice)) {
	print STDERR "Could not get slice object associated with $self\n";
	return undef;
    }
    $self->{'SLICE'} = $slice;
    return $slice;
}

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#
# The expiration time for an aggregate is when the slice expires.
# The DB field is ignored.
#
sub expires($)
{
    my ($self) = @_;

    return undef
	if (! ref($self));

    my $slice = $self->GetSlice();
    return undef
	if (!defined($slice));

    return $slice->expires();
}

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#
# Get the creator for the aggregate.
#
sub GetCreator($)
{
    my ($self) = @_;

    return undef
	if (! ref($self));

    if (!defined($self->creator_uuid())) {
	print STDERR "No creator associated with $self\n";
	return undef;
    }
    return GeniUser->Lookup($self->creator_uuid(), 1);
}

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#
# Create a signed credential for this aggregate, issued to the provided user.
# The credential will grant all permissions for now.
#
# Should we store these credentials in the DB, recording what we hand out?
#
sub NewCredential($$)
{
    my ($self, $owner) = @_;

    return undef
	if (! (ref($self) && ref($owner)));

    my $credential = GeniCredential->Create($self, $owner);
    if (!defined($credential)) {
	print STDERR "Could not create credential for $self, $owner\n";
	return undef;
    }
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    if (defined($self->nickname())) {
	$credential->AddExtension("nickname", $self->nickname());
    }
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    if ($credential->Sign($self->GetCertificate()) != 0) {
	print STDERR "Could not sign credential for $self, $owner\n";
	return undef;
    }
    return $credential;
}

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#
# Get the manifest for an aggregate. Returns the XML string.
#
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sub GetManifest($$)
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{
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    my ($self, $asxml) = @_;
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    return undef
	if (! ref($self));

    my $slice      = $self->GetSlice();
    return undef
	if (!defined($slice));
    my $slice_uuid = $slice->uuid();

    my $query_result =
	DBQueryWarn("select manifest from geni_manifests ".
		    "where slice_uuid='$slice_uuid'");
    
    if (!$query_result || !$query_result->numrows) {
	print STDERR "GetManifest: Could not locate manifest for $self\n";
	return undef;
    }
    my ($xml) = $query_result->fetchrow_array();

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    my $manifest = GeniXML::Parse($xml);
    if (!defined($manifest)) {
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	return undef;
    }
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    #
    # Update the manifest ticket to reflect the current expiration time.
    #
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    my $valid_date = POSIX::strftime("20%y-%m-%dT%H:%M:%SZ",
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				     gmtime(str2time($slice->expires())));
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    if (GeniXML::IsVersion0($manifest)) {
	GeniXML::SetText("valid_until", $manifest, $valid_date);
    } else {
	GeniXML::SetText("expires", $manifest, $valid_date);
    }
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    return $manifest
	if (!$asxml);
    
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    $xml = GeniXML::Serialize($manifest);
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    return $xml;
}

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#
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# Process the manifest. Just hand off to the slivers.
#
sub ProcessManifest($$)
{
    my ($self, $manifest) = @_;

    return -1
	if (! ref($self));

    my @slivers = ();
    if ($self->SliverList(\@slivers) != 0) {
	print STDERR "Could not get sliver list for $self\n";
	return -1;
    }

    foreach my $sliver (@slivers) {
	next
	    if (ref($sliver) ne "GeniSliver::Node");

	if ($sliver->ProcessManifest($manifest) != 0) {
	    return -1;
	}
    }
    return 0;
}

#
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# Start all the slivers in the aggregate. Start is special since it
# sorta means reboot, and the only thing we reboot are nodes. And,
# since we might have multiple vnodes on a pnode, we want to be efficient
# about it.
#
# XXX Is is assumed that there is a single toplevel aggregate for the
# slice, so we can get all the nodes.
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#
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sub Start($$$)
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{
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    my ($self, $version, $restart) = @_;
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    my $msg = "Internal Error: ";
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    require Lan;
    require OSinfo;
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    return -1
	if (! ref($self));
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    $restart = 0
	if (!defined($restart));
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    # Clear last error.
    $self->SetErrorLog("");    

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    my $experiment = Experiment->Lookup($self->slice_uuid());
    if (!defined($experiment)) {
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	$msg .= "Could not map $self to its experiment";
	goto bad;
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    }
    my $pid = $experiment->pid();
    my $eid = $experiment->eid();

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    #
    # Look for a firewall that needs to be setup first.
    #
    my ($firewall, $firewall_sliver);
    my $firewalled = $experiment->IsFirewalled(\$firewall);
    if ($firewalled && !defined($firewall)) {
	$msg .= "Could not determine firewall for experiment";
	goto bad;
    }

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    my @slivers = ();
    if ($self->SliverList(\@slivers) != 0) {
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	$msg .= "Could not get sliver list for $self";
	goto bad;
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    }
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    my %reboots  = ();
    my %vnodes   = ();
    my %poweron  = ();
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    my %reloads  = ();
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    # See "bad" label below; want to know what sliver failed (if any).
    my $sliver;
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    foreach $sliver (@slivers) {
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	if (ref($sliver) ne "GeniSliver::Node") {
	    next
		if ($sliver->state() eq "started" && !$restart);

	    $sliver->Start($version) == 0
		or return -1;
	    next;
	}
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	# Remember which sliver is the firewall. 
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	if ($firewalled && $firewall eq $sliver->resource_id()) {
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	    $firewall_sliver = $sliver;
	}
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	my $node = Node->Lookup($sliver->resource_id());
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	if (!defined($node)) {
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	    $msg .= "Could not map $sliver to a node";
	    goto bad;
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	}
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	my $reservation = $node->Reservation();
	if (!defined($reservation)) {
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	    $msg .= "$node no longer belongs to $self";
	    goto bad;
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	}
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	if ($reservation->SameExperiment($experiment)) {
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	    my $vnode;
	    
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	    #
	    # Since this is an aggregate, some slivers may already be
	    # in the started state. Skip those, unless doing a restart.
	    #
	    next
		if ($sliver->state() eq "started" && !$restart);
	    
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	    if ($node->isvirtnode()) {
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		# A virtnode on a shared physical node needs reboot or setup
		if ($node->sharing_mode()) {
		    if ($restart && $sliver->state() eq "started") {
			$reboots{$node->node_id} = $node;
		    }
		    else {
			$vnodes{$node->node_id} = $node;
		    }
		    next;
		}
		# See below.
		$vnode = $node;
		
		#
		# Now it gets messy. Do not want to mess with the physnode
		# if its running other vnodes, and we just need to fire up
		# a new one. But if the physnode is going to get rebooted,
		# then there is no need to do anything with the vnodes; they
		# will boot up with the physnode. 
		#
		# But, have to make sure that the phys node gets setup.
		#
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		my $physnodeid = $node->phys_nodeid();
		next
		    if (exists($poweron{$physnodeid}) ||
			exists($reboots{$physnodeid}) ||
			exists($reloads{$physnodeid}));
		$node = Node->Lookup($physnodeid);
		if (!defined($node)) {
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		    $msg .= "Could not lookup $physnodeid";
		    goto bad;
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		}
	    }
	    #
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	    # If the node is not imageable, then there is not much to
	    # do except turn it on or reboot it. I am assuming that a
	    # a non imageable node is always in raw mode.
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	    #
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	    if (!$node->imageable()) {
		if ($sliver->state() eq "stopped") {
		    $poweron{$node->node_id} = $node;
		}
		else  {
		    $reboots{$node->node_id} = $node;
		}
		next;
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	    }
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	    #
	    # See if the node is running the requested OS.
	    #
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	    my $osinfo = OSinfo->Lookup($node->def_boot_osid());
	    if (!defined($osinfo)) {
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		$msg .= "Could not get osinfo for $node";
		goto bad;
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	    }
	    print STDERR "$node wants to boot $osinfo.\n";
	    if ($osinfo->IsGeneric()) {
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		#
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		# Map generic OSID to the specific one.
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		#
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		my $tmp = $osinfo->ResolveNextOSID($experiment);
		if (!defined($tmp)) {
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		    $msg .= "No next mapping for $osinfo on $node!";
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		    goto bad;
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		}
		print STDERR "  Mapping $osinfo on $node to $tmp\n";
		$osinfo = $tmp;
	    }
	    #
	    # Make sure this OSID is actually loaded on the machine.
	    #
	    my $isloaded = $node->IsOSLoaded($osinfo);
	    if ($isloaded < 0) {
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		$msg .= "Error determining if $osinfo is loaded on $node";
		goto bad;
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	    }
	    if (! $isloaded) {
		print STDERR "  Setting up a reload for $node\n";
		
		my $image = $osinfo->MapToImage($node->type());
		if (!defined($image)) {
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		    $msg .= "  No image for $osinfo on $node";
		    goto bad;
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		}
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		if (!exists($reloads{$image->imageid()})) {
		    $reloads{$image->imageid()} = [ ];
		} 
		push(@{ $reloads{$image->imageid()} }, $node);
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		# Reload means reboot or power on.
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		# But skip the firewall; that is done specially since
		# it has to come up before everything else.
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		if (!defined($vnode) && $sliver->state() eq "stopped") {
		    $poweron{$node->node_id} = $node;
		}
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		else {
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		    $reboots{$node->node_id} = $node;
		}
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	    }
	    else {
		#
		# Make sure boot is set correctly.
		#
		if ($node->OSSelect($osinfo, "def_boot_osid", 0)) {
		    print STDERR "  Could not os_select $node to $osinfo\n";
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		    goto bad;
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		}
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		#
		# If the node is going to get rebooted, then do not need
		# to worry about the vnodes on it. But if the node is ready
		# to go, then we have to do the vnodes. Remember, we do not
		# reboot the physnode since we might only be adding a new node
		# in which case, a full reboot is wrong.
		#
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		if (! $node->IsUp() ||
		    # This catches the pg nodes which are in ISUP while free.
		    ($sliver->status() eq "created" && !defined($vnode))) {
		    # We should be using allocstatus. 
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		    if ($sliver->state() eq "stopped" && !defined($vnode)) {
			$poweron{$node->node_id} = $node;
		    }
		    else {
			$reboots{$node->node_id} = $node;
		    }
		}
		elsif ($restart && !defined($vnode)) {
		    # Just a physnode that needs restarting.
		    $reboots{$node->node_id} = $node;
		}
		elsif (defined($vnode)) {
		    if ($sliver->state() eq "started") {
			$reboots{$vnode->node_id} = $vnode;
		    }
		    else {
			$vnodes{$vnode->node_id} = $vnode;
		    }
		}
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	    }
	}
	else {
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	    $msg .= "$node is not reserved to $self";
	    goto bad;
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	}
    }
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    # See "bad" label below.
    $sliver = undef;
    
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    #
    # Cull out vnodes that are going to get rebooted cause the
    # physnode is getting rebooted. 
    #
    my %tmp = %vnodes;
    foreach my $vnode (values(%vnodes)) {
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	if (! (exists($reboots{$vnode->phys_nodeid()}) ||
	       exists($poweron{$vnode->phys_nodeid()}))) {
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	    $tmp{$vnode->node_id()} = $vnode;
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	}
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    }
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    %vnodes = %tmp;

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    #
    # Setup the reloads. We do not reboot the nodes until below.
    #
    if (keys(%reloads)) {
	foreach my $imageid (keys(%reloads)) {
	    my @nodes = @{ $reloads{$imageid} };
	    my @node_ids = map { $_->node_id() } @nodes;

	    # No wait, no reboot. reload runs completely in the background.
	    system("$OSLOAD -s -r -m $imageid @node_ids");
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	    if ($?) {
		$msg .= "Failed to setup reload: $imageid on @node_ids";
		goto bad;
	    }
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	}
    }

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    if ($version >= 2) {
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	#
	# Dump the manifest into the experiment directory.
	#
	my $userdir       = $experiment->UserDir();
	my $manifest_file = "$userdir/tbdata/geni_manifest";
	my $manifest      = $self->GetManifest(1);
	if (open(MAN, ">$manifest_file")) {
	    print MAN $manifest;
	    close(MAN);
	}

	#
	# Now we need a mapping of node_id to sliver_urn.
	#
	my $mapping_file = "$userdir/tbdata/geni_mapping";
	if (open(MAP, ">$mapping_file")) {
	    foreach my $sliver (@slivers) {
		next
		    if (ref($sliver) ne "GeniSliver::Node");

		print MAP $sliver->resource_id();
		print MAP " ";
		print MAP $sliver->sliver_urn();
		print MAP "\n";
	    }
	    close(MAP);
	}
	
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	if (system("$GENTOPOFILE $pid $eid")) {
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	    $msg .= "$GENTOPOFILE failed\n";
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	    goto bad;
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	}
	if (system("$EXPORTS_SETUP")) {
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	    $msg .= "$EXPORTS_SETUP failed\n";
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	    goto bad;
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	}
	# The nodes will not boot locally unless there is a DNS record.
	if (system("$NAMEDSETUP")) {
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	    $msg .= "$NAMEDSETUP failed\n";
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	    goto bad;
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	}
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	my @diff = ();
	my @same = ();
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	if (Lan->CompareVlansWithSwitches($experiment, \@diff, \@same)) {
	    print STDERR "CompareVlansWithSwitches failed!\n";
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	    goto bad;
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	}
	if (@diff) {
	    system("$SNMPIT -f ". join(" ", map("-o $_", @diff)));
	    if ($?) {
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		$msg .= "Failed to remove obsolete VLANs.";
		goto bad;
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	    }
	}
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	system("$SNMPIT -t $pid $eid");
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	if ($?) {
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	    $msg .= "Failed to setup vlans";
	    goto bad;
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	}
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	if ($experiment->SyncPortLans()) {
	    $msg .= "Failed to add ports to shared vlans";
	    goto bad;
	}
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    }

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    #
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    # Before anything, the firewall has to be turned on or rebooted.
    # Then we have to wait for it to come up before we can let the
    # rest of the nodes go. 
    #
    if ($firewalled &&
	(exists($poweron{$firewall}) || exists($reboots{$firewall}))) {
	my $node_id;
	require StateWait;
	require EmulabConstants;

	if (exists($poweron{$firewall})) {
	    my $node = $poweron{$firewall};
	    $node_id = $node->node_id();
	    
	    print STDERR "Powering on the firewall: $node_id\n";
	
	    system("$POWER on $node_id");
	    if ($?) {
		$msg .= "Failed to power on firewall: $node_id";
		$firewall_sliver->SetStatus("failed");
		goto bad;
	    }
	    delete($poweron{$firewall});
	}
	else {
	    my $node = $reboots{$firewall};
	    $node_id = $node->node_id();
	    
	    print STDERR "Rebooting the firewall: $node_id\n";
	    
	    system("$NODEREBOOT $node_id");
	    if ($?) {
		$msg .= "Failed to reboot firewall: $node_id";
		$firewall_sliver->SetStatus("failed");
		goto bad;
	    }
	    delete($reboots{$firewall});
	}
	$StateWait::debug = 0;
	my @states = (EmulabConstants::TBDB_NODESTATE_ISUP());

	if (StateWait::initStateWait(\@states, $node_id)) {
	    $msg .=  "Failed to initialize the statewait library!";
	    $firewall_sliver->SetStatus("failed");
	    goto bad;
	}
	my @finished = ();
	my @failed   = ();
	
	# Now we can statewait.
	print STDERR "Waiting for firewall ($node_id) to boot\n";
	
	if (StateWait::waitForState(\@finished, \@failed, (15 * 60))) {
	    $msg .= "Failed in waitForState for firewall: $node_id!";
	    $firewall_sliver->SetStatus("failed");
	    goto bad;
	}
	StateWait::endStateWait();

	#
	# Note that waitForState does not view timeout as failure,
	# so if both @finished and @failure are empty, we timed out.
	# Timeout is failure in this case.
	#
	@failed = ($node_id)
	    if (! (@finished || @failed));

	if (@failed) {
	    $msg .= "Firewall failed to boot properly: $node_id!";
	    $firewall_sliver->SetStatus("failed");
	    goto bad;
	}
    }

    #
    # Then power on any physical nodes that had been stopped.
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    # Then reboot the physical nodes, then any leftover virtual nodes.
1158
    #
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    if (keys(%poweron)) {
	my @node_ids = keys(%poweron);

	#
	# Should waiting be an option?
	#
	system("$POWER on @node_ids");
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	if ($?) {
	    $msg .= "Failed to power on @node_ids";
	    goto bad;
	}
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    }
    if (keys(%reboots)) {
	my @node_ids = keys(%reboots);
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	#
	# Should waiting be an option?
	#
	system("$NODEREBOOT @node_ids");
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	if ($?) {
	    $msg .= "Failed to reboot @node_ids";
	    goto bad;
	}
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    }
    if (keys(%vnodes)) {
	my @node_ids = keys(%vnodes);
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	#
	# Should waiting be an option?
	#
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	system("$VNODESETUP -j -m $pid $eid @node_ids");
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	if ($?) {
	    $msg .= "Failed to set up vnodes @node_ids";
	    goto bad;
	}
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    }
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    #
    # Start the event scheduler.
    #
    my $action = ($restart ? "replay" : "start");
    system("$EVENTSYS $action $pid,$eid");
    if ($?) {
	$msg .= "Failed to (re)start the event system";
	goto bad;
    }

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    #
    # Worked? Set the new state. Needs more thought ...
    #
    foreach my $sliver (@slivers) {
	$sliver->SetState("started")
	    if (ref($sliver) eq "GeniSliver::Node");
    }
    return 0;
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  bad:
    if (defined($msg)) {
	$self->SetErrorLog($msg);
	print STDERR "$msg\n";
    }
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    # Mark the offending sliver as failed.
    if (defined($sliver)) {
	$sliver->SetStatus("failed");
    }
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    return -1;
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}

#
# Stop all the slivers in the aggregate. Stop is brutal, better to
# use restart!
#
sub Stop($$)
{
    my ($self, $version) = @_;
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    my $msg = "Internal Error: ";
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    return -1
	if (! ref($self));

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    # Clear last error.
    $self->SetErrorLog("");    

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    my $experiment = Experiment->Lookup($self->slice_uuid());
    if (!defined($experiment)) {
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	$msg .= "Could not map $self to its experiment";
	goto bad;
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    }
    my $pid = $experiment->pid();
    my $eid = $experiment->eid();

    my @slivers = ();
    if ($self->SliverList(\@slivers) != 0) {
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	$msg .= "Could not get sliver list for $self";
	goto bad;
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    }
    my %pnodes = ();
    my %vnodes = ();

    foreach my $sliver (@slivers) {
	next
	    if (ref($sliver) ne "GeniSliver::Node");

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	my $node = Node->Lookup($sliver->resource_id());
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	if (!defined($node)) {
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	    $msg .= "Could not map $sliver to a node";
	    goto bad;
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	}
	my $reservation = $node->Reservation();
	if (!defined($reservation)) {
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	    $msg .= "$node no longer belongs to $self";
	    goto bad;
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	}
	if ($reservation->SameExperiment($experiment)) {
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	    #
	    # Since this is an aggregate, some slivers may already be
	    # in the stopped state. Skip those.
	    #
	    next
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		if ($sliver->state() eq "stopped"
		    || $sliver->state() eq "new");
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	    if ($node->isvirtnode()) {
		$vnodes{$node->node_id} = $node;
	    }
	    else {
		# node_reboot is smart enough to know that if a pnode
		# is rebooted it can ignore the vnodes on it, so do
		# not optimize this here.
		$pnodes{$node->node_id} = $node;
	    }
	}
	else {
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	    $msg .= "$node is reserved to another, not $self";
	    goto bad;
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	}
    }
    #
    # Cull out vnodes that are going to get killed cause the
    # physnode is getting powered down.
    #
    my %tmp = %vnodes;
    foreach my $vnode (values(%vnodes)) {
	if (!exists($pnodes{$vnode->phys_nodeid()})) {
	    $tmp{$vnode->node_id()} = $vnode;
	}
    }
    %vnodes = %tmp;

    if ($version >= 2) {
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	if ($experiment->ClearPortLans()) {
	    $msg .= "Failed to remove ports from shared vlans";
	    goto bad;
	}
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	system("$SNMPIT -r $pid $eid");
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	if ($?) {
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	    $msg .= "Failed to remove vlans";
	    goto bad;
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	}
    }
    
    #
    # Now power down the physical nodes, then any leftover virtual nodes.
    #
    if (keys(%pnodes)) {
	my @node_ids = keys(%pnodes);

	#
	# Should waiting be an option?
	#
	system("$POWER off @node_ids");
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	if ($?) {
	    $msg .= "Failed to power off @node_ids";
	    goto bad;
	}
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