create_instance.in 43.9 KB
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#!/usr/bin/perl -w
#
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# Copyright (c) 2008-2015 University of Utah and the Flux Group.
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# 
# {{{GENIPUBLIC-LICENSE
# 
# GENI Public License
# 
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and/or hardware specification (the "Work") to
# deal in the Work without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Work, and to permit persons to whom the Work
# is furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Work.
# 
# THE WORK IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE WORK OR THE USE OR OTHER DEALINGS
# IN THE WORK.
# 
# }}}
#
use strict;
use English;
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use Getopt::Long;
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use XML::Simple;
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use File::Temp qw(tempfile :mktemp tmpnam :POSIX);
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use Data::Dumper;
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use Cwd qw(realpath);
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#
# Create a quick VM.
# 
sub usage()
{
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    print "Usage: quickvm [-u uuid] [--site site:1=aggregate ...] <xmlfile>\n";
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    exit(1);
}
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my @optlist = ('d', 'v', 'u=s', 'a=s', 'S');
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my $debug   = 0;
my $verbose = 1;
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my $DEFAULT_URN  = "urn:publicid:IDN+apt.emulab.net+authority+cm";
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my $xmlfile;
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my $webtask;
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my $localuser  = 0;
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my $usestitcher= 0;
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my $quickuuid;
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my $default_aggregate_urn = $DEFAULT_URN;
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my $this_user;
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my $xmlparse;
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my $instance;
my $slice;
my $sitemap;
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my $usetracker = 0;
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my @aggregate_urns = ();

# Debugging
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my $usemydevtree  = 0;
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# Protos
sub fatal($);
sub UserError($);
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sub SnapShot($$$);
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sub CreateDatasetCreds($$$$$);
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sub CreateSlivers();
sub RunStitcher();
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sub GetSSHKeys($$$);
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#
# Configure variables
#
my $TB		  = "@prefix@";
my $TBOPS         = "@TBOPSEMAIL@";
my $TBLOGS        = "@TBLOGSEMAIL@";
my $OURDOMAIN     = "@OURDOMAIN@";
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my $MAINSITE      = @TBMAINSITE@;
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my $PGENIDOMAIN   = "@PROTOGENI_DOMAIN@";
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my $PROTOGENI_URL = "@PROTOGENI_URL@";
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my $SACERT	  = "$TB/etc/genisa.pem";
my $CMCERT	  = "$TB/etc/genicm.pem";
my $SSHKEYGEN     = "/usr/bin/ssh-keygen";
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my $SSHSETUP      = "$TB/sbin/aptssh-setup";
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my $ADDPUBKEY     = "$TB/sbin/addpubkey";
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my $UPDATEGENIUSER= "$TB/sbin/protogeni/updategeniuser";
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my $STITCHER      = "$TB/gcf/src/stitcher.py";
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my $OPENSSL       = "/usr/bin/openssl";
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# Names of the holding projects.
my $APT_HOLDINGPROJECT   = "aptguests";
my $CLOUD_HOLDINGPROJECT = "CloudLab";

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# un-taint path
$ENV{'PATH'} = '/bin:/usr/bin:/usr/local/bin:/usr/site/bin';
delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};

#
# Turn off line buffering on output
#
$| = 1; 

# Load the Testbed support stuff.
use lib "@prefix@/lib";
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use EmulabConstants;
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use libtestbed;
use libaudit;
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use APT_Profile;
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use APT_Instance;
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use APT_Geni;
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use APT_Dataset;
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use User;
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use Project;
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use Group;
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use OSinfo;
use emutil;
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use libEmulab;
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use GeniDB;
use GeniUser;
use GeniCertificate;
use GeniCredential;
use GeniSlice;
use GeniAuthority;
use GeniHRN;
use Genixmlrpc;
use GeniResponse;
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use GeniXML;
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use WebTask;
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use Logfile;
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use EmulabFeatures;
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#
# Parse command arguments. Once we return from getopts, all that should be
# left are the required arguments.
#
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Getopt::Long::Configure("no_ignore_case");
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my %options = ();
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if (! GetOptions(\%options, @optlist, "site=s%" => \$sitemap)) {
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    usage();
}
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if (defined($options{"a"})) {
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    $default_aggregate_urn = $options{"a"};
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}
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if (defined($options{"d"})) {
    $debug = 1;
}
if (defined($options{"v"})) {
    $verbose = 1;
}
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if (defined($options{"S"})) {
    $usestitcher = 1;
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}
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if (defined($options{"u"})) {
    $quickuuid = $options{"u"};
}
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if (@ARGV < 1) {
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    usage();
}
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$xmlfile = shift(@ARGV);
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#
# Check the filename when invoked from the web interface; must be a
# file in /tmp.
#
if (getpwuid($UID) ne "nobody") {
    $this_user = User->ThisUser();
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    if (! defined($this_user)) {
	fatal("You ($UID) do not exist!");
    }
    $localuser = 1;
}
if (!defined($this_user) || !$this_user->IsAdmin()) {
    if ($xmlfile =~ /^([-\w\.\/]+)$/) {
	$xmlfile = $1;
    }
    else {
	fatal("Bad data in pathname: $xmlfile");
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    }

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    # Use realpath to resolve any symlinks.
    my $translated = realpath($xmlfile);
    if ($translated =~ /^(\/tmp\/[-\w\.\/]+)$/) {
	$xmlfile = $1;
    }
    else {
	fatal("Bad data in translated pathname: $xmlfile");
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    }
}

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# Email record.
if (! $debug) {
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    my $opts = LIBAUDIT_LOGTBLOGS()|LIBAUDIT_LOGONLY();
    AuditStart(0, undef, $opts);
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    #
    # Once we determine the project, we can add the appropriate log CC
    #
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}
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# Connect to the SA DB.
DBConnect(GENISA_DBNAME());

#
# Load the SA cert to act as caller context.
#
my $sa_certificate = GeniCertificate->LoadFromFile($SACERT);
if (!defined($sa_certificate)) {
    fatal("Could not load certificate from $SACERT\n");
}
my $sa_authority = GeniAuthority->Lookup($sa_certificate->urn());
if (!defined($sa_authority)) {
    fatal("Could not load SA authority object");
}

#
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# We use the normal XMLRPC route, so need a context.
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#
my $context = Genixmlrpc->Context($sa_certificate);
if (!defined($context)) {
    fatal("Could not create context to talk to CM");
}
Genixmlrpc->SetContext($context);

#
# Must wrap the parser in eval since it exits on error.
#
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$xmlparse = eval { XMLin($xmlfile,
			 VarAttr => 'name',
			 ContentKey => '-content',
			 SuppressEmpty => undef); };
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fatal($@)
    if ($@);

#
# Make sure all the required arguments were provided.
#
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foreach my $key ("username", "email", "profile") {
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    fatal("Missing required attribute '$key'")
	if (! (exists($xmlparse->{'attribute'}->{"$key"}) &&
	       defined($xmlparse->{'attribute'}->{"$key"}) &&
	       $xmlparse->{'attribute'}->{"$key"} ne ""));
}

#
# Gather up args and sanity check.
#
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my ($value, $user_urn, $user_uid, $user_hrn, $user_email, $project, $pid,
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    $sshkey, $profile, $profileid, $version, $rspecstr, $errmsg, $userslice_id);
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#
# Username and email has to be acceptable to Emulab user system.
#
$value = $xmlparse->{'attribute'}->{"username"}->{'value'};
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if (! TBcheck_dbslot($value, "users", "uid",
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		     TBDB_CHECKDBSLOT_WARN|TBDB_CHECKDBSLOT_ERROR)) {
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    fatal("Illegal username: $value - " . TBFieldErrorString());
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}
$user_uid = $value;
$user_urn = GeniHRN::Generate("$OURDOMAIN", "user", $user_uid);
$user_hrn = "${PGENIDOMAIN}.${user_uid}";

$value = $xmlparse->{'attribute'}->{"email"}->{'value'};
if (! TBcheck_dbslot($value, "users", "usr_email",
		     TBDB_CHECKDBSLOT_WARN|TBDB_CHECKDBSLOT_ERROR)) {
    fatal("Illegal email address: $value");
}
$user_email = $value;

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#
# The instance name is optional, we will make one up if not supplied.
#
if (exists($xmlparse->{'attribute'}->{"instance_name"}) &&
    $xmlparse->{'attribute'}->{"instance_name"}->{'value'} ne "") {
    $value = $xmlparse->{'attribute'}->{"instance_name"}->{'value'};
    if (! TBcheck_dbslot($value, "experiments", "eid",
			 TBDB_CHECKDBSLOT_WARN|TBDB_CHECKDBSLOT_ERROR)) {
	fatal("Illegal instance name: $value");
    }
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    $userslice_id = $value;
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}

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#
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# Profile.
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#
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# This is a safe lookup.
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$value = $xmlparse->{'attribute'}->{"profile"}->{'value'};
$profile = APT_Profile->Lookup($value);
if (!defined($profile)) {
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    fatal("No such profile: $value");
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}
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$profileid = $profile->profileid();
$version   = $profile->version();
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#
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# Optional rspec, as for a Parameterized Profile.
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#
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if (exists($xmlparse->{'attribute'}->{"rspec"})) {
    $rspecstr  = $xmlparse->{'attribute'}->{"rspec"}->{'value'};
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}
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else {
    $rspecstr  = $profile->CheckFirewall(!$localuser);
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}

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#
# Update rspec with site aggregate urns.
#
# SetSites will tell us if we must use stitcher.
#
my $needstitcher = 0;
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my $tmp = APT_Profile::SetSites(\$rspecstr, $sitemap, $default_aggregate_urn,
				\@aggregate_urns, \$needstitcher, \$errmsg);
if ($tmp) {
    ($tmp < 0 ? fatal($errmsg) : UserError($errmsg));
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}
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# but do not override command line force.
$usestitcher = 1 if ($needstitcher);
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#
# Look for datasets; need to verify that the datasets being referenced
# still exist and are still permissible to use, and we have to generate
# credentials for those datasets (if not a global dataset). The tricky
# aspect is that while a dataset and a profile have project permissions,
# the experiment has no project association, so if the profile/dataset
# perms are okay, then we send over a credential that tells the CM to
# allow this experiment to use that dataset in that project. 
#
$errmsg = "Bad dataset";
if (APT_Profile::CheckDatasets($rspecstr, $profile->pid(), \$errmsg)) {
    UserError($errmsg);
}
#
# A temporary hack to make sure that the user does not try to run
# an x386 image on the Cloudlab cluster (ARMs). This will eventually
# get replaced with Jon's constraint checking code.
#
if ($profile->CheckNodeConstraints($default_aggregate_urn, \$errmsg)) {
    UserError($errmsg);
}

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#
# Use ssh-keygen to see if the key is valid and convertable. We first
# try to get the fingerprint, which will tells us if its already in
# openssh format. If not, try to convert it.
#
if (exists($xmlparse->{'attribute'}->{"sshkey"}) &&
    defined($xmlparse->{'attribute'}->{"sshkey"}) &&
    $xmlparse->{'attribute'}->{"sshkey"} ne "") {
    $sshkey = $xmlparse->{'attribute'}->{"sshkey"}->{'value'};
    my ($fh, $keyfile) = tempfile(UNLINK => 0);
    print $fh $sshkey;

    if (system("$SSHKEYGEN -l -f $keyfile >/dev/null 2>/dev/null")) {
	if (! open(KEYGEN, "$SSHKEYGEN -i -f $keyfile 2>/dev/null |")) {
	    fatal("Could not start ssh-keygen");
	}
	$sshkey = <KEYGEN>;
	if (!close(KEYGEN)) {
	    UserError("Could not parse ssh key!");
	}
    }
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    close($fh);
    unlink($keyfile);
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}
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chomp($sshkey)
    if (defined($sshkey));
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#
# See if the GeniUser exists. Create if not, but that means we
# have to create an ssl certificate (which the user will never see)
# so that we can operate on behalf of the user (via speaksfor).
#
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# Note that we want to check for the user local account ahead of
# SA account, to bypass their guest account that might still be
# in the table.
#
my $geniuser;

if ($localuser) {
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    my $emulab_user = User->Lookup($user_uid);
    
    #
    # Hmm, users with real accounts who never used Geni, but now want
    # to use APT/Cloud, have no encrypted SSL certificate. Rather then
    # force them through the web ui (and have to explain it), create one
    # for them using a random passphrase. The user will not know the
    # passphrase, but for most users it will not matter.
    #
    # This is also going to catch expired certificates, we will regenerate
    # them using the existing passphrase.
    #
    if ($emulab_user->HasValidEncryptedCert() == 0 &&
	$emulab_user->GenEncryptedCert()) {
	fatal("Could not (re)generate encrypted certificate");
    }
    # Now this will work; without a certificate, this would fail.
    if (defined($emulab_user)) {
	$geniuser = GeniUser::LocalUser->Create($emulab_user);
    }
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}
else {
    $geniuser = GeniUser->Lookup($user_urn);

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    #
    # In Utah, check for alternate SA
    #
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    if (!defined($geniuser) && $MAINSITE) {
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	$user_urn = GeniHRN::Generate("aptlab.net", "user", $user_uid);
	$user_hrn = "aptlab.${user_uid}";
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	$geniuser = GeniUser->Lookup($user_urn, 0);
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    }
}
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if (!defined($geniuser)) {
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    if ($localuser) {
	fatal("Could not lookup local user $user_urn");
    }
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    #
    # Do not allow overlap with local users.
    #
    if (User->Lookup($user_uid)) {
	fatal("User $user_uid exists in the local user table");
    }

    print "Geni user does not exist; creating one ...\n"
	if ($debug);

    #
    # Want to remember the auth token we emailed for later.
    #
    my $auth_token = $xmlparse->{'attribute'}->{"auth_token"}->{'value'};
    if ($auth_token !~ /^[\w]+$/) {
	fatal("Bad auth token: $auth_token");
    }
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    my $blob = {"urn"      => $user_urn,
		"hrn"      => $user_hrn,
		"email"    => $user_email,
		"showuuid" => 1};
    if ($MAINSITE) {
	$blob->{'useaptca'} = 1;
    }
    my $certificate = GeniCertificate->Create($blob);
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    fatal("Could not create certificate")
	if (!defined($certificate));

    $geniuser = GeniUser->Create($certificate, $sa_authority);
    fatal("Could not create new geni user")
	if (!defined($geniuser));

    $geniuser->SetAuthToken($auth_token);

    #
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    # Setup browser ssh.
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    #
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    system("$SSHSETUP " . $geniuser->uuid());
    fatal("Could not create ssh key pair")
	if ($?);
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}
my $user_uuid = $geniuser->uuid();
# So we know this user has dome something lately.
$geniuser->BumpActivity();
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if ($localuser) {
    my $emulab_user = $geniuser->emulab_user();
    if ($emulab_user->IsNonLocal()) {
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	#
	# A user created from a Geni certificate via geni-login. We
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	# asked for the current ssh keys from the MA when they logged
	# in, but we ask again to make sure have the latest keys.
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	#
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	system("$UPDATEGENIUSER -s " . $emulab_user->uid());
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	if (0) {
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	    fatal("Could not update ssh keys for nonlocal user");
	}
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	#
	# Check project membership, must be a member of at least one
	# valid project at the GPO portal.
	#
	system("$UPDATEGENIUSER -p " . $emulab_user->uid());
	if ($?) {
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	    UserError("Could not get your project membership from your ".
		      "member authority. It is probably offline, please try ".
		      "again later.");
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	}
	
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	# Nonlocal users get the holding project.
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	$pid = $CLOUD_HOLDINGPROJECT;
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    }
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    elsif (defined($sshkey) && !$emulab_user->LookupSSHKey($sshkey)) {
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	#
	# XXX This is deprecated; we no longer show the ssh box to
	#     real users. Remove when we are satisfied with new
	#     ssh key management page.
	#
	
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	#
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	# A local user. We mark keys that come through this path
	# with the isaptkey flag (-a to addpubkey) so that we know
	# which key in the DB it is. The reason for this is that the
	# user might be a classic emulab user, but is now using the
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	# APT/Cloud UI. The key provided in the web interface will
	# replace this key.
	#
	# XXX This is in flux, we now allow APT users to manage all
	# their keys via the web interface.
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	#
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	my ($fh, $keyfile) = tempfile(UNLINK => 0);
	print $fh $sshkey;

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	if (system("$ADDPUBKEY -a -u $user_uid -f $keyfile")) {
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	    fatal("Could not add new ssh pubkey");
	}
	close($fh);
	unlink($keyfile);
    }
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    #
    # Hmm, users with real accounts who never used Geni, but now want
    # to use APT/Cloud, have no encrypted SSL certificate. Rather then
    # force them through the web ui (and have to explain it), create one
    # for them using a random passphrase. The user will not know the
    # passphrase, but for most users it will not matter.
    #
    # This is also going to catch expired certificates, we will regenerate
    # them using the existing passphrase.
    #
    if ($emulab_user->HasValidEncryptedCert() == 0 &&
	$emulab_user->GenEncryptedCert()) {
	fatal("Could not (re)generate encrypted certificate");
    }
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    # Local users are required to select a project.
    if (! exists($xmlparse->{'attribute'}->{"pid"})) {
	fatal("No project provided for new instance");
    }
    $project = Project->Lookup($xmlparse->{'attribute'}->{"pid"}->{"value"});
    if (!defined($project)) {
	fatal("Project provided does not exist");
    }
    if (!$project->AccessCheck($emulab_user, TB_PROJECT_CREATEEXPT)) {
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	fatal("No permission to create experiments in project ".
	      $project->pid());
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    }
    $pid = $project->pid();
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    # Use of the Image Tracker is a Portal directive at the moment.
    $usetracker = 1
	if (GetSiteVar("protogeni/use_imagetracker") &&	
	    EmulabFeatures->FeatureEnabled("APT_UseImageTracker",
					   $emulab_user, $project));
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}
elsif (!$localuser) {
    if (defined($sshkey)) {    #
	# Guest user; remember key. For now we accept only one key. We store
	# it simply so we can display it again for the user in the web
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	# interface. We allow key reuse for existing users, see above.
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	#
	$geniuser->DeleteKeys();
	$geniuser->AddKey($sshkey);
    }
    # Guest users get a holding project.
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    $pid = $APT_HOLDINGPROJECT;
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    $project = Project->Lookup($pid);
    if (!defined($project)) {
	fatal("Project $pid does not exist");
    }
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}
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#
# Now we know where to send to logs.
#
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if (!$debug) {
    AddAuditInfo("cc", $project->LogsEmailAddress());
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    if ($MAINSITE && $project->isEmulab()) {
	# Mostly people use the Cloudlab UI.
	AddAuditInfo("cc", "cloudlab-logs\@cloudlab.us");
    }
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}
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#
# Get the set of keys (accounts) that need to be sent along. We build
# them in CM format, but convert to AM format later if needed.
#
my $sshkeys;
if (GetSSHKeys($geniuser, $project, \$sshkeys) < 0 || !@{$sshkeys}) {
    fatal("No ssh keys to use for $geniuser/$project!");
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}

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# Generate the extra credentials that tells the backend this experiment
# can access the datasets.
my @dataset_credentials = ();
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if (defined($profile)) {
    my $retval = CreateDatasetCreds($rspecstr,
				    $profile->pid(), $geniuser, 
				    \$errmsg, \@dataset_credentials);
    if ($retval) {
	($retval < 0 ? fatal($errmsg) : UserError($errmsg));
    }
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}

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#
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#
# Now generate a slice registration and credential
#
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my $safe_uid    = $user_uid; $safe_uid =~ s/_/-/;
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my $slice_id    = (defined($userslice_id) ? $userslice_id :
		   $safe_uid . "-QV" . TBGetUniqueIndex('next_quickvm', 1));
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my $slice_urn   = GeniHRN::Generate("${OURDOMAIN}:${pid}", "slice", $slice_id);
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my $slice_hrn   = "${PGENIDOMAIN}.${pid}.${slice_id}";
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my $SERVER_NAME = (exists($ENV{"SERVER_NAME"}) ? $ENV{"SERVER_NAME"} : "");
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#
# Make sure slice is unique. Probably retry here at some point. 
#
if (GeniSlice->Lookup($slice_hrn) || GeniSlice->Lookup($slice_urn)) {
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    if (defined($userslice_id)) {
	UserError("Slice name already in use, please use another. If you ".
		  "just terminated an experiment with this name, it takes a ".
		  "minute or two for the name to become available again.");
    }
    else {
	fatal("Could not form a unique slice name");
    }
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}
	    
#
# Generate a certificate for this new slice.
#
my $slice_certificate =
    GeniCertificate->Create({'urn'  => $slice_urn,
			     'hrn'  => $slice_hrn,
			     'showuuid' => 1,
			     'email'=> $user_email});

if (!defined($slice_certificate)) {
    fatal("Could not generate certificate for $slice_urn");
}
# Slice is created as locked.
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$slice = GeniSlice->Create($slice_certificate,
			   $geniuser, $sa_authority, undef, 1);
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if (!defined($slice)) {
    $slice_certificate->Delete();
    fatal("Could not create new slice object for $slice_urn");
}
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# These get quick expirations, unless it is a real user.
if ($slice->SetExpiration(time() + (($localuser ? 16 : 3) * 3600)) != 0) {
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    fatal("Could not set the slice expiration for $slice_urn");
}
my $slice_uuid = $slice->uuid();

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#
# Generate a new ssl key/cert to be used to derive an ssh key pair
# or whatever else is needed. This is sent along as an option when the
# sliver is created (or provisioned, when stitching).
#
# This is going to be a real geni certificate, albeit a slice
# certificate in the alternate CA domain, that can be used at the
# "portal" XMLRPC interface. The key is unencrypted and put on the
# nodes, hence the alternate CA, and the XMLRPC server will not allow
# this certificate to do anything, except at the portal RPC server.
#
my $alt_urn = GeniHRN::Generate("aptlab.net:${pid}", "slice", $slice_id);
my $alt_hrn = "aptlab.${pid}.${slice_id}";
my $alt_url = "$PROTOGENI_URL/portal";

my $altblob = {"urn"      => $alt_urn,
	       "hrn"      => $alt_hrn,
	       "url"      => $alt_url,
	       "uuid"     => $slice_uuid,
	       "email"    => $user_email,
	       "nostore"  => 1,
	       "useaptca" => 1,
	       "showuuid" => 1};
my $alt_certificate = GeniCertificate->Create($altblob);
fatal("Could not create alt certificate")
    if (!defined($alt_certificate));

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#
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# Generate credentials we need.
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#
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my ($slice_credential, $speaksfor_credential) =
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    APT_Geni::GenCredentials($slice, $geniuser);
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if (! (defined($speaksfor_credential) &&
       defined($slice_credential))) {
    fatal("Could not generate credentials");
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}

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#
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# Got this far, lets create a quickvm record.
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#
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my $quickvm_uuid = (defined($quickuuid) ? $quickuuid : NewUUID());
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if (!defined($quickvm_uuid)) {
    fatal("Could not generate a new uuid");
}
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my $blob = {'uuid'         => $quickvm_uuid,
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	    'name'         => $slice_id,
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	    'profile_id'   => $profileid,
	    'profile_version' => $version,
	    'slice_uuid'   => $slice_uuid,
	    'creator'      => $geniuser->uid(),
	    'creator_idx'  => $geniuser->idx(),
	    'creator_uuid' => $geniuser->uuid(),
	    'status'       => "created",
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	    'servername'   => $SERVER_NAME,
	    'rspec'        => $rspecstr,
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	    'cert'         => $alt_certificate->cert(),
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	    'privkey'      => $alt_certificate->PrivKeyDelimited(),
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};
if (defined($project)) {
    $blob->{"pid"}     = $project->pid();
    $blob->{"pid_idx"} = $project->pid_idx();
}
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$errmsg = undef;
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$instance = APT_Instance->Create($blob, \$errmsg);
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if (!defined($instance)) {
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    fatal(defined($errmsg) ? $errmsg :
	  "Could not create instance record for $quickvm_uuid");
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}
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# To keep stuff happy until multisite support finished.
if (keys(%{$sitemap})) {
    my ($temp_aggregate_urn) = values(%{$sitemap});
    $instance->Update({'aggregate_urn' => $temp_aggregate_urn});
}
else {
    $instance->Update({'aggregate_urn' => $default_aggregate_urn});
}
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# We use this list of references for ParRun below.
my @aggregate_list = ();
foreach my $aggregate_urn (@aggregate_urns) {
    my $authority = GeniAuthority->Lookup($aggregate_urn);
    if (!defined($authority)) {
	$authority = GeniAuthority->CreateFromRegistry("cm", $aggregate_urn);
	if (!defined($authority)) {    
	    fatal("Could not load CM authority object for $aggregate_urn");
	}
    }
    my $aggobj = $instance->AddAggregate($aggregate_urn);
    if (!defined($aggobj)) {
	fatal("Could not create aggregate object for $aggregate_urn");
    }
    $aggobj->_authority($authority);
    push(@aggregate_list, $aggobj);
}

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#
# Create a webtask so that we can store additional information about
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# the sliver while we wait.
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#
$webtask = WebTask->Create($instance->uuid());
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if (!defined($webtask)) {
    fatal("Could not create a webtask!");
}
$webtask->AutoStore(1);

print STDERR "\n";
print STDERR "User:    $user_urn\n";
print STDERR "Email:   $user_email" . (!$localuser ? " (guest)" : "") . "\n";
if (defined($profile)) {
    print STDERR "Profile: " . $profile->name() . ":${version}\n";
}
print STDERR "Slice:   $slice_urn\n";
print STDERR "Server:  $SERVER_NAME\n";
print STDERR "Cluster: ";
print STDERR join(",", map($_->aggregate_urn(), @aggregate_list))  . "\n";
print STDERR "\n";
print STDERR "$rspecstr\n";
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#
# Exit and let caller poll for status.
#
if (!$debug) {
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    libaudit::AuditPrefork();
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    my $child = fork();
    if ($child) {
	# Parent exits but avoid libaudit email.
	exit(0);
    }
    # All of the logging magic happens in here.
    libaudit::AuditFork();
}
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# Bind the process id.
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$webtask->SetProcessID($PID);

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if ($usestitcher) {
    my $rval = RunStitcher();
    if ($rval) {
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	$slice->UnLock();
	$instance->SetStatus("failed");
	$webtask->Exited(1);
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	exit($rval);
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    }
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}
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else {
    my $rval = CreateSlivers();
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    #
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    # We do not want email for most mapping errors, so look at the
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    # return code to see if we want to kill the log (user will see the
    # error in the web ui). 
    #
    if ($rval) {
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	if ($rval == GENIRESPONSE_BADARGS ||
	    $rval == GENIRESPONSE_INSUFFICIENT_NODES ||
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	    $rval == GENIRESPONSE_INSUFFICIENT_MEMORY ||
	    $rval == GENIRESPONSE_INSUFFICIENT_BANDWIDTH ||
	    $rval == GENIRESPONSE_NO_MAPPING) {
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	    AuditAbort()
		if (!$debug);
	}
	$webtask->Exited($rval);
	exit($rval);
    }
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}
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$instance->SetStatus("provisioned");
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$instance->ComputeNodeCounts();
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#
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# Now wait for the sliver to be ready, which means polling.
#
# Shorten default timeout.
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#
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Genixmlrpc->SetTimeout(60);
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sub WaitForSliver($)
{
    my ($ref) = @_;
    my $aggobj = $ref;
    $aggobj->Refresh();
    my $webtask   = $aggobj->webtask();
    my $authority = $aggobj->_authority();
    my $cmurl     = $authority->url();
    my $urn       = $authority->urn();
    $webtask->Refresh();

    # Debugging
    $cmurl =~ s/protogeni/protogeni\/stoller/ if ($usemydevtree);

    my $seconds  = 1500;
    my $interval = 15;
    my $ready    = 0;
    my $failed   = 0;
    my $public_url;
    my $repblob;

    while ($seconds > 0) {
	sleep($interval);
	$seconds -= $interval;
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	my $response = $aggobj->SliceStatus();
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	if (!defined($response) || !defined($response->value()) ||
	    ($response->code() != GENIRESPONSE_SUCCESS &&
	     $response->code() != GENIRESPONSE_SERVER_UNAVAILABLE &&
	     $response->code() != GENIRESPONSE_BUSY)) {
	    print STDERR "SliverStatus failed";
	    if (defined($response)) {
		print STDERR ": " . $response->output();
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		if ($response->output() =~ /read timeout/) {
		    $webtask->output("Lost contact with the aggregate. " .
				     "Possibly a network failure, ".
				     "please try again later.");
		}
		else {
		    $webtask->output($response->output());
		}
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	    }
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	    print STDERR "\n";
	    $failed = 1;
	    last;
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	}
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	next
	    if ($response->code() == GENIRESPONSE_BUSY ||
		$response->code() == GENIRESPONSE_SERVER_UNAVAILABLE);
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	$repblob = $response->value();
	#
	# Convert to something smaller, with info the web interface
	# cares about. We get this on each loop, update so the web
	# interface can show changes.
	#
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	my $statusblob = {};
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	foreach my $urn (keys(%{$repblob->{'details'}})) {
	    my $details = $repblob->{'details'}->{$urn};
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	    my $node_id = $details->{'client_id'};
	    $statusblob->{$node_id} = $details;
	}
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	$webtask->sliverstatus($statusblob);

	if (exists($repblob->{'public_url'})) {
	    $public_url = $repblob->{'public_url'};
	    $aggobj->SetPublicURL($public_url);
	}
	if ($repblob->{'status'} eq "ready") {
	    $ready = 1;
	    last;
	}
	elsif ($repblob->{'status'} eq "failed") {
	    $failed = 1;
	    print STDERR "*** $urn failed\n";
	    $webtask->output("Experiment setup on $urn failed");
	    last;
	}
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    }
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    if ($failed || !$ready) {
	$aggobj->SetStatus("failed");
	if (!$ready) {
	    # XXX Need better handling for timeout.
	    print STDERR "*** $urn timed out.\n";
	    $webtask->output("Experiment setup on $urn timed out");
	}
	$webtask->Exited(1);
	return 1;
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    }
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    $aggobj->SetStatus("ready");
    $webtask->Exited(0);
    return 0;
}

#
# Okay, fire off the waits for each aggregate
#
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my @return_codes = ();
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if (ParRun({"maxwaittime" => 99999, "maxchildren" => scalar(@aggregate_list)},
	    \@return_codes, \&WaitForSliver, @aggregate_list)) {
    #
    # The parent caught a signal. Leave things intact so that we can
    # kill things cleanly later.
    #
    $slice->UnLock();
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    print STDERR "Internal error in WaitForSlivers\n";
    $webtask->output("Internal error in WaitForSlivers");
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    $instance->SetStatus("failed");
    $webtask->Exited(1);
    exit(-1);
}
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print "$slice_urn\n";
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#
# Check the exit codes; any failure is a total failure (for now).
#
my $failed = 0;
foreach my $aggobj (@aggregate_list) {
    my $code = shift(@return_codes);

    # Updated in a forked child, must refresh. 
    $aggobj->Refresh();
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    print $aggobj->aggregate_urn() . "\n";
    if ($code) {
	$failed++;
	print "WaitforSliver Failure!\n";
	if (defined($aggobj->webtask()->output())) {
	    $webtask->output($aggobj->webtask()->output());
	    print $aggobj->webtask()->output() . "\n";
	}
	else {
	    $webtask->output("WaitforSliver Failure at " .
			     $aggobj->aggregate_urn());
	}
    }
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    if (defined($aggobj->public_url())) {
	print $aggobj->public_url() . "\n";
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    }
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    print "\n" . $aggobj->manifest() . "\n\n";
    print "------------------------------------------------------------\n\n";
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}
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$slice->UnLock();
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if ($failed) {
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    $instance->SetStatus("failed");
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    $webtask->Exited(1);
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}
else {
    $instance->SetStatus("ready");
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    $webtask->Exited(0);
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}
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exit(0);

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#
# Create credentials to access datasets.
#
sub CreateDatasetCreds($$$$$)
{
    my ($xml, $pid, $user, $pmsg, $pref) = @_;
    my @credentials = ();
    
    my $rspec = GeniXML::Parse($xml);
    if (! defined($rspec)) {
	print STDERR "CreateDatasetCreds: Could not parse rspec\n";
	return -1;
    }
    foreach my $ref (GeniXML::FindNodes("n:node", $rspec)->get_nodelist()) {
	foreach my $blockref (GeniXML::FindNodesNS("n:blockstore",
						   $ref,
				   $GeniXML::EMULAB_NS)->get_nodelist()) {
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	    my $dataset_id = GeniXML::GetText("persistent", $blockref);
	    if (!defined($dataset_id)) {
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		# persistent is deprecated.
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		$dataset_id = GeniXML::GetText("dataset", $blockref);
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	    }
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	    #
	    # We only care about datasets here, we let the backend
	    # do the error checking on ephemeral blockstores.
	    #
	    next
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		if (!defined($dataset_id));

	    my $class = GeniXML::GetText("class", $blockref);
	    if (!defined($class)) {
		$class = "remote";
	    }
	    # Image backed. No checking since the image has to be global
	    # anyway. Needs more thought. 
	    next
		if ($class eq "local");
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	    my ($authority, $type, $id) = GeniHRN::Parse($dataset_id);
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	    #
	    # Separate project from name; this is how the rspec specifies
	    # the dataset they want, since it might be in another project
	    #
	    if ($id =~ /^([-\w]+)\/\/(.+)$/) {
		$pid = $1;
		$id  = $2;
	    }
	    my $dataset = APT_Dataset->Lookup("$pid/$id");
	    if (!defined($dataset)) {
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		$dataset = APT_Dataset->LookupByRemoteURN($dataset_id);
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		if (!defined($dataset)) {
		    $$pmsg = "Persistent dataset '$pid/$id' does not exist";
		    return 1;
		}
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	    }
	    my $certificate = $dataset->GetCertificate();
	    if (!defined($certificate)) {
		$$pmsg = "No certificate for dataset '$pid/$id'";
		return -1;
	    }
	    my $credential =
		APT_Geni::GenCredentials($certificate, $geniuser,
					 ["blockstores"]);
	    if (!defined($credential)) {
		$$pmsg = "Could not create credential for dataset '$pid/$id'";
		return -1;
	    }
	    push(@credentials, $credential->asString());
	}
    }
    @$pref = @credentials;
    return 0;
}

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#
# Create a sliver at a single aggregate. This is called from parrun
# so it needs to return success or failure, we lookup the results
# in the DB.
#
sub CreateSliver($)
{
    my ($ref) = @_;
    my $aggobj = $ref;
    $aggobj->Refresh();
    my $webtask   = $aggobj->webtask();
    my $authority = $aggobj->_authority();
    my $cmurl     = $authority->url();
    my $urn       = $authority->urn();
    $webtask->Refresh();

    # Debugging
    $cmurl =~ s/protogeni/protogeni\/stoller/ if ($usemydevtree);

    #
    # This creates the sliver and starts it. We have to watch for the
    # server being too busy.
    #
    my $tries = 15;
    my $response;

    while (1) {
	$response =
	    Genixmlrpc::CallMethod($cmurl, undef,
				   "CreateSliver",
				   { "slice_urn"   => $slice_urn,
				     "rspec"       => $rspecstr,
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				     "keys"        => $sshkeys,
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				     "credentials" =>
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					 [$slice_credential->asString(),
					  $speaksfor_credential->asString(),
					  @dataset_credentials
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					 ],
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				     "certificate" => $alt_certificate->cert(),
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				     "key"         =>
				        $alt_certificate->PrivKeyDelimited(),
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				     "usetracker"  => $usetracker,
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				   });
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	if (!defined($response) || $response->code() != GENIRESPONSE_SUCCESS) {
	    if (defined($response) &&
		$response->code() == GENIRESPONSE_SERVER_UNAVAILABLE &&
		$tries >= 0) {
		print STDERR "Server for $urn reports too busy, ".
		    "waiting a while ...\n";
		sleep(int(rand(20)) + 10);
		$tries--;
		next;
	    }
	    if (defined($response)) {
		$webtask->output($response->output());
		$webtask->Exited($response->code());
	    }
	    else {
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		$webtask->Exited(-1);
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	    }
	    $aggobj->SetStatus("failed");
	    
	    if (defined($response) && defined($response->logurl())) {
		$aggobj->SetPublicURL($response->logurl());
	    }
	    print STDERR "CreateSliver failed on $urn: ".
		(defined($response) ? $response->output() : "") . "\n";
	    return -1;
	}
	last;
    }
    # This will get overwritten later.
    if (defined($response) && defined($response->logurl())) {
	$aggobj->SetPublicURL($response->logurl());
    }
    my $manifest = $response->value()->[1];
    if (!defined($manifest)) {
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	$webtask->Exited(-1);
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	$aggobj->SetStatus("failed");
	print STDERR "CreateSliver $urn: No manifest returned\n";
	return -1;
    }
    $aggobj->SetStatus("provisioned");
    $aggobj->SetManifest($manifest);
    return 0;
}

sub CreateSlivers()
{
    my ($perrmsg) = @_;

    my @return_codes = ();
    if (ParRun({"maxwaittime" => 99999,
		"maxchildren" => scalar(@aggregate_list)},
	       \@return_codes, \&CreateSliver, @aggregate_list)) {
	#
	# The parent caught a signal. Leave things intact so that we can
	# kill things cleanly later.
	#
	$slice->UnLock();
	$instance->SetStatus("failed");
	return -1;
    }
    #
    # Check the exit codes; any failure is a total failure (for now).
    #
    foreach my $aggobj (@aggregate_list) {
	#
	# Have to refresh the sliver objects since they were updated in a fork.
	# Need the manifests for the call to ComputeNodeCounts below.
	#
	$aggobj->Refresh();
	my $code = shift(@return_codes);
	if ($code) {
	    $slice->UnLock();
	    $instance->SetStatus("failed");
	    $webtask->output($aggobj->webtask()->output())
		if (defined($aggobj->webtask()->output()));
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	    # This will be the createsliver exit code if we got one, or -1.
	    $code = $aggobj->webtask()->exitcode()
		if (defined($aggobj->webtask()->exitcode()));
	    return $code;
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	}
    }
    return 0;
}

#
# Run the stitcher to allocate resources. We use this whenever we have
# links that cross aggregates
#
sub RunStitcher()
{
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    my $tmpdir        = mktemp("/tmp/stitcher.XXXXXX");
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    my $slicecredfile = "$tmpdir/slicecred.xml";
    my $speaksforfile = "$tmpdir/speaksforcred.xml";
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    my $al2scredfile  = "$tmpdir/al2scred.xml";
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    my $rspecfile     = "$tmpdir/rspec.xml";
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    my $stdoutfile    = "$tmpdir/stitcher.stdout";
    my $stderrfile    = "$tmpdir/stitcher.stderr";
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    my $failed        = 0;

    #
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    # The AM API uses a different ssh key structure.
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    #
</