node_reboot.in 6.29 KB
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#!/usr/bin/perl -wT
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#
# EMULAB-COPYRIGHT
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# Copyright (c) 2000-2007 University of Utah and the Flux Group.
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# All rights reserved.
#
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use strict;
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use English;
use Getopt::Std;

#
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# Reboot a node (or nodes). Will power cycle the node as a last resort.
# Use -e option to reboot all nodes in an experiment.
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#
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# Exit value is 0 if all nodes reboot okay, or the number of nodes
# could not be rebooted.
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#
sub usage()
{
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    print(STDERR
	  "Usage: node_reboot [-d] [-f] [-w] [-k] node [node ...]\n" .
	  "       node_reboot [-d] [-f] [-w] [-k] -e pid,eid\n".
	  "Use the -d option to turn on debugging\n" .
	  "Use the -e option to reboot all the nodes in an experiment\n" .
	  "Use the -w option to to wait for nodes is come back up\n" .
	  "Use the -k option to power cycle nodes in PXEWAIT mode\n" .
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	  "Use the -b option to reboot nodes in PXEWAIT mode\n" .
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	  "Use the -a option to reboot all free nodes\n".
	  "Use the -c option to reconfig nodes instead of rebooting\n".
	  "Use the -f option to power cycle (and not wait for nodes to die)\n");
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    exit(-1);
}
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# The hidden -r option runs this in "realmode", ie don't send an event, but
# really do the work instead.
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my $optlist     = "dfe:wrkacbp";
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my $debug       = 0;
my $powercycle  = 0;
my $waitmode    = 0;
my $realmode    = 1; # XXX Temporary, until we make event sending the default.
my $killmode    = 0;
my $reconfig    = 0;
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my $rebootmode  = 0;
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my $prepare     = 0;
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#
# Configure variables
#
my $TB		= "@prefix@";
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my $CLIENT_BIN  = "@CLIENT_BINDIR@";
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# Locals
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my @nodes	= ();
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#
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# Testbed Support libraries
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#
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use lib "@prefix@/lib";
use libdb;
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use libreboot;
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use Experiment;
use Node;
use User;
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# un-taint path
$ENV{'PATH'} = '/bin:/sbin:/usr/bin:/usr/local/bin';
delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};

# Turn off line buffering on output
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$| = 1;
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#
# We don't want to run this script unless its the real version.
#
if ($EUID != 0) {
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    die("*** $0:\n".
        "    Must be root! Maybe its a development version?\n");
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}

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#
# Verify user and get his DB uid and other info for later.
#
my $this_user = User->ThisUser();
if (! defined($this_user)) {
    die("*** $0:\n".
	"    You ($UID) do not exist!\n");
}

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#
# Parse command arguments. Once we return from getopts, all that should
# left are the required arguments.
#
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my %options = ();
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if (! getopts($optlist, \%options)) {
    usage();
}
if (defined($options{"d"})) {
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    $debug = 1;
}
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if (defined($options{"b"})) {
    $rebootmode = 1;
}
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if (defined($options{"f"})) {
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    $powercycle = 1;
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}
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if (defined($options{"k"})) {
    $killmode = 1;
}
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if (defined($options{"w"})) {
    $waitmode = 1;
}
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if (defined($options{"p"})) {
    $prepare = 1;
}
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if (defined($options{"r"})) {
    $realmode = 1;
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}
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if (defined($options{"c"})) {
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    $reconfig = 1;
}
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if (defined($options{"a"})) {
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    usage()
	if (@ARGV);
    
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    #
    # Reboot all free nodes
    #
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    if ($UID && !$this_user->IsAdmin()) {
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	die("*** $0:\n".
	    "    You not have permission to reboot all free nodes!\n");
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    }

    my $query_result =
	DBQueryFatal("select n.node_id from nodes as n ".
		     "left join reserved as r on r.node_id=n.node_id ".
		     "left join node_types as nt on nt.type=n.type ".
		     "where nt.class='pc' and n.role='testnode' and ".
		     "      r.pid is NULL");

    if ($query_result->numrows == 0) {
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	die("*** $0:\n".
	    "    There are no free nodes to reboot\n");
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    }
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    while (my ($nodeid) = $query_result->fetchrow_array()) {
	push(@nodes, $nodeid);
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    }
}
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elsif (defined($options{"e"})) {
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    #
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    # Reboot all nodes in an experiment
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    #
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    usage()
	if (@ARGV);
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    my $experiment = Experiment->Lookup($options{"e"});
    if (!defined($experiment)) {
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	die("*** $0:\n".
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	    "    Unknown experiment!\n");
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    }
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    #
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    # Verify permission to muck with this experiment. This is to head off
    # permission problems early; the nodes are indvidually checked later
    # in the library.
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    #
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    if ($UID && !$this_user->IsAdmin() &&
	! $experiment->AccessCheck($this_user, TB_EXPT_MODIFY)) {
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	die("*** $0:\n".
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	    "    You not have permission to reboot nodes in $experiment!\n");
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    }
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    my @nodelist = $experiment->NodeList();
    if (! @nodelist) {
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	die("*** $0:\n".
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            "    There are no nodes reserved in $experiment\n");
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    }
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    #
    # If this is a firewalled experiment, don't reboot the firewall.
    # If you want to reboot the firewall, you have to do it individually.
    #
    # Two reasons.  One is that the firewall is not conceptually part of
    # the experiment and the user should not "be aware" of it.  This
    # is a pretty lame reason because pretty much everywhere else, the
    # firewall IS part of the experiment.  That leads to reason number
    # two: rebooting the firewall causes all other nodes in the experiment
    # to become disconnected until the firewall reboots.  For some machines,
    # that are also rebooting as you recall, not getting PXE info for a
    # significant amount of time causes them to fail to the next boot.
    # For some machines this might mean halting ("Strike any key to continue"),
    # as there is no other boot possibility.  This means ya gotta come back
    # later and reboot all those nodes again.
    #
    my $firewall = "";
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    if ($experiment->IsFirewalled()) {
	$experiment->FirewallAndPort(\$firewall, undef) == 0 or
	    die("*** $0:\n".
		"    Could not get the firewall node for $experiment\n");
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    }
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    foreach my $node (@nodelist) {
	push(@nodes, $node->node_id())
	    if ($node->node_id() ne $firewall);
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    }
}
else {
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    #
    # Reboot nodes listed on command line.
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    #
    usage()
	if (!@ARGV);
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    foreach my $n (@ARGV) {
	my $node = Node->Lookup($n);
	if (!defined($node)) {
	    die("*** $0:\n".
		"    Node $n does not exist!\n");
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	}
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	if ($UID && !$this_user->IsAdmin() &&
	    ! $node->AccessCheck($this_user, TB_NODEACCESS_REBOOT)) {
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	    die("*** $0:\n".
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		"    You are not allowed to reboot $node!\n");
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	}
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	push(@nodes, $node->node_id());
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    }
}

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#
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# Okay, call into the library using a hash of arguments.
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#
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my %args   = ();
my %status = ();
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$args{'debug'}       = $debug;
$args{'powercycle'}  = $powercycle;
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$args{'rebootmode'}  = $rebootmode;
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$args{'waitmode'}    = $waitmode;
$args{'realmode'}    = $realmode;
$args{'killmode'}    = $killmode;
$args{'reconfig'}    = $reconfig;
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$args{'prepare'}     = $prepare;
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$args{'nodelist'}    = [ @nodes ];
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exit(nodereboot(\%args, \%status));