predict.in 4.78 KB
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#!/usr/bin/perl -w
#
# Copyright (c) 2016 University of Utah and the Flux Group.
# 
# {{{EMULAB-LICENSE
# 
# This file is part of the Emulab network testbed software.
# 
# This file is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or (at
# your option) any later version.
# 
# This file is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public
# License for more details.
# 
# You should have received a copy of the GNU Affero General Public License
# along with this file.  If not, see <http://www.gnu.org/licenses/>.
# 
# }}}
#
use strict;
use English;
use Getopt::Std;
use Date::Parse;
use POSIX;

#
# Configure variables
#
my $TB		 = "@prefix@";
my $TBOPS        = "@TBOPSEMAIL@";

#
# Testbed Support libraries
#
use lib "@prefix@/lib";
use emdb;
use libtestbed;
use Project;
use Reservation;

sub usage()
{
    print STDERR "Usage: predict [-p] [-u] [-t time] type\n";
    print STDERR "   -h   This message\n";
    print STDERR "   -p   Identify by pid only, not pid/eid\n";
    print STDERR "   -t   Give time/date for prediction (defaults to now)\n";
    print STDERR "   -u   Interpret/display all times in UTC\n";
    
    exit( -1 );
}

my $optlist    = "dhpt:";
my $debug      = 0;
my $time       = time; # default to now
my $pidonly    = 0;
my $type;

sub fatal($)
{
    my ($mesg) = $_[0];

    die("*** $0:\n".
	"    $mesg\n");
}

sub convert($) {
    my ($unixtime) = @_;

    return strftime( "%Y-%m-%d %H:%M", localtime( $unixtime ) );
}

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

#
# Untaint the path
# 
$ENV{'PATH'} = "/bin:/sbin:/usr/bin:";

#
# Parse command arguments. Once we return from getopts, all that should be
# left are the required arguments.
#
my %options = ();
if (! getopts($optlist, \%options)) {
    usage();
}
if (defined($options{"u"})) {
    # handle this option ASAP, since it affects parsing of other options!
    $ENV{ "TZ" } = "UTC";
}
if (defined($options{h})) {
    usage();
}
if (defined($options{p})) {
    $pidonly = 1;
}
if (defined($options{"t"})) {
    $time = $options{"t"};
    if ($time !~ /^\d+$/) {
	$time = str2time($time);
	if( !defined( $time ) ) {
	    fatal("Could not parse -t option.");
	}
    }
}
usage() if( @ARGV != 1 );
$type = shift( @ARGV );
unless( $type =~ /^[-\w]+$/ ) {
    fatal( "Invalid node type." );
}

my $reservations = Reservation->LookupAll( $type );
my @timeline = ();
my $free;
my %used = ();
my %reserved = ();

foreach my $reservation ( @$reservations ) {
    my $start;
    my $end;

    if( defined( $reservation->eid() ) ) {
	# A swapped-in experiment.  Already using nodes (so no
	# need to save a start event), and will later release real nodes.
	my $pid = $reservation->pid();
	my $eid = $reservation->eid();
	my $id = $pidonly ? $pid : "$pid/$eid";
	if( !exists( $used{ $id } ) ) {
	    $used{ $id } = 0;
	    $reserved{ $id } = 0;
	}
	$used{ $id } += $reservation->nodes();
	$end = { 'id' => $id,
		 't' => $reservation->end(),
		 'used' => -$reservation->nodes(),
		 'reserved' => 0 };
    } elsif( defined( $reservation->pid() ) ) {
	# A reservation.  Uses then releases reserved nodes.
	$start = { 'id' => $reservation->pid(),
		   't' => $reservation->start(),
		   'used' => 0,
		   'reserved' => $reservation->nodes() };
	$end = { 'id' => $reservation->pid(),
		 't' => $reservation->end(),
		 'used' => 0,
		 'reserved' => -$reservation->nodes() };
    } else {
	# Available resources.  Provides nodes for all time.
	$free = $reservation->nodes();
    }

    push( @timeline, $start ) if( defined( $start->{'t'} ) );
    push( @timeline, $end ) if( defined( $end->{'t'} ) );
}

my @events = sort { $a->{'t'} <=> $b->{'t'} } @timeline;
    
foreach my $event ( @events ) {
    last if( $event->{'t'} > $time );
		     
    my $id = $event->{'id'};
    if( !exists( $used{ $id } ) ) {
	$used{ $id } = 0;
	$reserved{ $id } = 0;
    }

    my $oldsum = $used{ $id } + $reserved{ $id };

    $used{ $id } += $event->{ 'used' };
    $reserved{ $id } += $event->{ 'reserved' };

    my $newsum = $used{ $id } + $reserved{ $id };

    $free += $oldsum - $newsum;
}

foreach my $used ( sort { $used{$b} <=> $used{$a} } keys( %used ) ) {
    my $val = $used{ $used };
    print "$used: $val\n" if( $val > 0 );
}

foreach my $reserved ( sort { $reserved{$b} <=> $reserved{$a} }
		       keys( %reserved ) ) {
    my $val = $reserved{ $reserved };
    print "[$reserved: $val]\n" if( $val > 0 );
}

if( $free >= 0 ) {
    print $free . " free node";
    print ( $free == 1 ? ".\n" : "s.\n" );
} else {
    print "Overbooked by " . -$free . " node";
    print ( $free == -1 ? ".\n" : "s.\n" );
}