shutdown-shared.in 3.03 KB
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#!/usr/bin/perl -w
#
# Copyright (c) 2010-2014 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 Data::Dumper;

#
# Update DB.
#
sub usage()
{
    print STDERR "Usage: shutdown-shared [-n] [node ...]\n";
    exit(-1);
}
my $optlist   = "n";
my $impotent  = 0;

#
# Configure variables
#
my $TB	         = "@prefix@";
my $TBOPS        = "@TBOPSEMAIL@";
my $SSHTB 	 = "$TB/bin/sshtb -n";
my $CLIENT_BIN   = "@CLIENT_BINDIR@";

# Protos
sub Fatal($);

# 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;

use lib "@prefix@/lib";
use libdb;
use libtestbed;
use libEmulab;
use Experiment;

#
# Parse command arguments.
#
my %options = ();
if (! getopts($optlist, \%options)) {
    usage();
}
if (defined($options{"n"})) {
    $impotent = 1;
}

#
# Must be root if actually doing this.
#
if ($UID) {
    Fatal("This script must be run as root! Maybe use sudo?")
}

#
# Grab the shared node experiment. Multiple shared pools?
#
my $experiment =
    Experiment->Lookup(TBOPSPID(), "shared-nodes") ||
    Experiment->Lookup(TBOPSPID(), "shared-node");
    
if (!defined($experiment)) {
    Fatal("Could not lookup shared node experiment. Exiting ...");
}
my @nodelist = $experiment->NodeList();

#
# We want to do this in parallel.
#
my $coderef = sub {
    my ($node)  = @_;
    my $node_id = $node->node_id();

    #
    # Must change our real UID to root so that ssh will work.
    #
    $UID = 0;

    if ($impotent) {
	print "Would shut down containers on $node ...\n";
	system("$SSHTB -host $node_id lvs");
    }
    else {
	print "Shutting down containers on $node ...\n";
	system("$SSHTB -host $node_id $CLIENT_BIN/bootvnodes -f -h");
    }
    return 1
	if ($?);
    return 0;
};

# Return codes for each node.
my @results = ();
if (ParRun({"maxwaittime" => 99999, "maxchildren" => 5},
	    \@results, $coderef, @nodelist)) {
    Fatal("ParRun failed!");
}

#
# Check the exit codes. 
#
my $count  = 0;
my $failed = 0;
foreach my $result (@results) {
    my ($node)  = $nodelist[$count];
    my $node_id = $node->node_id();

    if ($result) {
	print STDERR "Shutdown failed on $node_id\n";
    }
    $count++;
}
exit(0);

sub Fatal($)
{
    my ($msg) = @_;

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