vnode_setup.in 12.4 KB
Newer Older
1
#!/usr/bin/perl -wT
Leigh B. Stoller's avatar
Leigh B. Stoller committed
2 3 4

#
# EMULAB-COPYRIGHT
5
# Copyright (c) 2000-2003 University of Utah and the Flux Group.
Leigh B. Stoller's avatar
Leigh B. Stoller committed
6 7
# All rights reserved.
#
8 9 10 11 12 13 14 15 16 17 18 19 20
use English;
use Getopt::Std;

#
# Set up the vnode state on a virtual (multiplexed) node.
#
# XXX - This script should only be run from os_setup!
#
# The output is all jumbled together since the updates are issued in parallel.
# Might be a pain when debugging. 
# 
sub usage()
{
Kirk Webb's avatar
Kirk Webb committed
21
    print STDOUT "Usage: vnode_setup [-f] [-k] [-n <numbatch>] [-w <wait_time>] <pid> <eid> [node ...]\n";
22 23
    exit(-1);
}
Kirk Webb's avatar
Kirk Webb committed
24
my  $optlist = "fdkn:w:";
25 26 27 28 29 30 31 32 33 34

#
# We don't want to run this script unless its the real version.
# That is, it must be setuid root. 
#
if ($EUID != 0) {
    die("*** $0:\n".
	"    Must be root! Maybe its a development version?\n");
}

35 36 37 38 39 40 41
#
# Configure variables
#
my $TB		= "@prefix@";
my $TESTMODE    = @TESTMODE@;
my $TBOPS       = "@TBOPSEMAIL@";
my $TBLOGS      = "@TBLOGSEMAIL@";
42
my $CLIENT_BIN  = "@CLIENT_BINDIR@";
43 44 45 46 47 48

my $ssh		= "$TB/bin/sshtb -n";
my $debug       = 0;
my $force       = 0;
my $failed      = 0;
my $killmode    = 0;
Kirk Webb's avatar
Kirk Webb committed
49
my $numbatch    = 10;
Kirk Webb's avatar
Kirk Webb committed
50
my $childwait   = 120;
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
my $dbuid;

#
# Load the Testbed support stuff. 
#
use lib "@prefix@/lib";
use libdb;
use libtestbed;

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

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

#
# Parse command arguments. Once we return from getopts, all that should be
# left are the required arguments.
#
%options = ();
if (! getopts($optlist, \%options)) {
    usage();
}
75
if (@ARGV < 2) {
76 77 78 79 80 81 82 83 84 85 86
    usage();
}
if (defined($options{"f"})) {
    $force = 1;
}
if (defined($options{"d"})) {
    $debug = 1;
}
if (defined($options{"k"})) {
    $killmode = 1;
}
Kirk Webb's avatar
Kirk Webb committed
87 88 89 90 91 92 93 94
if (defined($options{"n"})) {
    if ($options{"n"} =~ /^(\d+)$/) {
        $numbatch = $1;
    }
    else {
        die ("*** Bad data in numbatch: $options{'n'}");
    }
}
Kirk Webb's avatar
Kirk Webb committed
95 96 97 98 99 100 101 102
if (defined($options{"w"})) {
    if ($options{"w"} =~ /^(\d+)$/) {
        $childwait = $1;
    }
    else {
        die ("*** Bad data in wait_time: $options{'w'}");
    }
}
Kirk Webb's avatar
Kirk Webb committed
103

104 105
my $pid   = shift(@ARGV);
my $eid   = shift(@ARGV);
106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123

#
# Untaint the arguments.
#
if ($pid =~ /^([-\@\w]+)$/) {
    $pid = $1;
}
else {
    die("*** Bad data in pid: $pid\n");
}	
if ($eid =~ /^([-\@\w]+)$/) {
    $eid = $1;
}
else {
    die("*** Bad data in eid: $eid\n");
}

#
124 125
# Verify permission to muck with this experiment. Note that this script
# is run as root from the plab monitor daemon.
126
#
127
if ($UID && !TBAdmin($UID) &&
128 129 130
    !TBExptAccessCheck($UID, $pid, $eid, TB_EXPT_DESTROY)) {
    die("*** $0:\n".
	"    You do not have permission to mess with $pid/$eid!\n");
131 132 133
}

#
134
# Get the list of nodes in this experiment.
135
#
136 137
my @nodes = ExpNodes($pid, $eid);
if (! @nodes) {
138 139 140
    warn("*** $0:\n".
	 "    No allocated nodes in experiment $pid/$eid!\n");
    exit(0);
141
}
142 143

# Nodes on the command line. Operate only on this set.
144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168
if (@ARGV) {
    my %fulllist = ();

    # Temporary hash list for searching.
    foreach my $node ( @nodes ) {
	$fulllist{$node} = 1;
    }
    @nodes = ();

    foreach my $node ( @ARGV ) {
	if ($node =~ /^([-\@\w]+)$/) {
	    $node = $1;

	    if (!defined($fulllist{$node})) {
		die("*** $0:\n".
		     "   Node $node is not allocated to $pid/$eid!\n");
	    }
	}
	else {
	    die("Bad node name: $node.");
	}
	push(@nodes, $node);
    }
}
my $exptstate = ExpState($pid, $eid);
169 170 171 172

# Just the vnodes mam.
foreach my $node (@nodes) {
    my $pnode;
173
    my $jailed;
174
    my $plab;
175
    my $allocstate;
176
    my $mode = ($killmode ? "teardown" : "setup");
177

178
    if (! TBIsNodeVirtual($node, \$jailed, \$plab)) {
179 180
	next;
    }
181 182 183 184
    if (! TBPhysNodeID($node, \$pnode)) {
	die("*** $0:\n".
	    "    No physical node for $node!\n");
    }
185

186 187
    TBGetNodeAllocState($node, \$allocstate);

188 189 190
    #
    # On remote nodes, or when forcemode is on, always do the deed.
    # Otherwise, look at experiment state.
191 192
    #
    if (!$force) {
193 194 195 196
	if ($exptstate eq EXPTSTATE_SWAPPING) {
	    #
	    # When swapping, local vnodes go down with the physnode.
	    #
197 198 199 200 201
	    if (! TBIsNodeRemote($node)) {
		print "$node will $mode with local node $pnode.\n";
		next;
	    }
	    elsif ($allocstate eq TBDB_ALLOCSTATE_DOWN) {
202 203 204 205 206 207 208
		if (!$plab) {
		    print "$node failed to boot; skipping $mode.\n";
		    next;
		}
		# Plab nodes need to be cleaned up.
		print "$node failed to boot; changing to cleanup.\n";
		$mode = "cleanup";
209
	    }
210
	}
211 212
	elsif ($exptstate eq EXPTSTATE_ACTIVATING ||
	       $exptstate eq EXPTSTATE_MODIFY_RESWAP) {
213
	    #
214 215 216 217 218 219 220 221 222 223 224
	    # The allocstate determines if the vnode actually needs to
	    # be setup or torndown. Note that a failed experiment will
	    # cause a bunch of vnodes to be torndown, while in the
	    # ACTIVATING state. See os_setup and assign_wrapper; the
	    # idea is to avoid doing setup/teardown up vnodes on
	    # machines that are rebooting anyway, or that failed.
	    # Complicated by modify which could add/subtract a vnode on
	    # an existing machine, but not reboot the machine. Note that
	    # free (now unused) vnodes will land in RES_TEARDOWN. It is
	    # assumed that these booted okay, and need to be torndown,
	    # even though they are not RES_READY.
225
	    #
226 227 228
	    if (! TBIsNodeRemote($node)) {
		if ($killmode) {
		    if ($allocstate eq TBDB_ALLOCSTATE_DOWN) {
229 230 231 232
			print "$node failed to boot; skipping $mode.\n";
			next;
		    }
		    elsif ($allocstate eq TBDB_ALLOCSTATE_RES_INIT_CLEAN()) {
233 234 235
			print "$node never booted; skipping $mode.\n";
			next;
		    }
236 237 238 239
		    elsif ($allocstate eq TBDB_ALLOCSTATE_RES_READY()) {
			print "$node will $mode with local node $pnode.\n";
			next;
		    }
240 241
		}
		elsif ($allocstate eq TBDB_ALLOCSTATE_RES_READY()) {
242
		    print "$node is already setting up on local node $pnode\n";
243 244 245
		    next;
		}
	    }
246 247
	    else {
		if ($killmode) {
248 249 250
		    if ($allocstate eq TBDB_ALLOCSTATE_DEAD) {
			# plab only. See below.
			print "$node failed to initialize; skipping $mode.\n";
251 252
			next;
		    }
253 254 255 256 257 258 259 260 261
		    elsif ($allocstate eq TBDB_ALLOCSTATE_DOWN) {
			if (!$plab) {
			    print "$node failed to boot; skipping $mode.\n";
			    next;
			}
			# Plab nodes need to be cleaned up.
			print "$node failed to boot; changing to cleanup.\n";
			$mode = "cleanup";
		    }
262 263 264 265
		    elsif ($allocstate eq TBDB_ALLOCSTATE_RES_INIT_CLEAN()) {
			print "$node never booted; skipping $mode.\n";
			next;
		    }
266
		}
267 268
		elsif ($allocstate eq TBDB_ALLOCSTATE_RES_READY()) {
		    print "$node is already set up on remote node $pnode\n";
269 270
		    next;
		}
271
		elsif ($allocstate eq TBDB_ALLOCSTATE_RES_INIT_DIRTY()) {
272
		    print "$node needs a reboot on remote node $pnode\n";
273 274
		    $mode = "reboot";
		}
275 276
	    }
	}
277 278 279 280 281 282
    }

    #
    # When setting up a vnode, force its event state into SHUTDOWN since
    # no telling what its initial state is. 
    # 
Kirk Webb's avatar
Kirk Webb committed
283 284
    # XXX: Don't we always want to set this?
    #
285
    if ($mode eq "teardown" || $mode eq "reboot") {
286 287
	TBSetNodeEventState($node, TBDB_NODESTATE_SHUTDOWN);
    }
288 289

    #
290 291 292 293 294 295
    # Put this into the list of calls we have to make in the next loop
    #
    push @vnodes, [$node, $pnode, $mode, $jailed, $plab];

}

296

297 298
my $children = 0;
my %child_vnodes = ();
Kirk Webb's avatar
Kirk Webb committed
299 300
print "vnode_setup running at parallelization: $numbatch ". 
    "wait_time: $childwait\n";
301 302
while (1) {

Kirk Webb's avatar
Kirk Webb committed
303 304 305
    # Space out the invocation of child processes a little.
    sleep(3);

306 307 308 309 310 311 312
    #
    # We're done when we've hit the last vnode, and we've outlived all of our
    # children
    #
    if ((!@vnodes) && ($children == 0)) {
	last;
    }
313

314 315 316
    #
    # There are more free slots
    #
Kirk Webb's avatar
Kirk Webb committed
317
    if (($children < $numbatch) && @vnodes) {
318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341
	#
	# Look for a vnode that is not on a pnode we're already working on
	# 
	# XXX - do this!
	
	my ($vnode, $pnode, $mode, $jailed, $plab) = @{pop @vnodes};
    
	print STDOUT "Doing $mode of vnode $vnode on $pnode ...\n";

	#
	# Run an ssh command in a child process, protected by an alarm to
	# ensure that the ssh is not hung up forever if the machine is in some
	# funky state.
	# 
	my $syspid = fork();

	if ($syspid) {
	    #
	    # Just keep track of it, we'll wait for it finish down below
	    #
	    $child_vnodes{$syspid} =
		[$vnode, $pnode, $mode, $jailed, $plab, time()];
	    $children++;
	} else {
342
            my $exval = 0;
343 344 345
	    # Must change our real UID to root so that ssh will work.
	    $UID = 0;

346
	    if ($plab && $mode eq "setup") {
Kirk Webb's avatar
Kirk Webb committed
347 348 349 350
                # Make sure vnode is in the proper state before trying to
                # bring it up.
                # XXX: do this for all vnodes (see above)?
                TBSetNodeEventState($vnode, TBDB_NODESTATE_SHUTDOWN);
Kirk Webb's avatar
Kirk Webb committed
351
		if (TBForkCmd("$TB/sbin/plabnode ". 
352
                              ($force ? "-f" : "").
Kirk Webb's avatar
Kirk Webb committed
353
                              " alloc $pid $eid $vnode", 1)) {
354 355
		    print STDERR "*** $0:\n" .
                        "    Plab node allocation failed\n";
356 357 358 359
		    # Should check DB state instead.
		    exit(99);
		}
	    }
360

361 362 363 364 365 366 367
	    # Cleanup is used only on plab nodes.
	    if ($mode ne "cleanup") {
		my $args = (($mode eq "teardown") ? "-k " :
			    ($mode eq "reboot" ? "-r " : " "));
		$args   .= ($jailed   ? "-j " : " ");
		$args   .= ($plab     ? "-p " : " ");
		$args   .= "$vnode ";
368 369 370 371 372 373 374 375 376 377 378 379
                
		$exval = TBForkCmd("$ssh -host $vnode ".
                                 "$CLIENT_BIN/vnodesetup $args",1);
            }

            # Free the plab node lease if necessary.
            if ($plab && ($mode eq "teardown" || $mode eq "cleanup")) {
                exec("$TB/sbin/plabnode free $pid $eid $vnode");
                die("*** $0:\n".
                    "    exec failed!\n");
            }
	    exit($exval);
380 381 382 383 384 385 386 387 388 389 390
	}
    } else {
	#
	# We have too many of the little rugrats, wait for one to die
	#

	#
	# Set up a timer - we want to kill processes after they hit 120 seconds
	# old (not much of a life, is it?), so we find the first one marked for
	# death.
	#
391
	my $oldest;
392 393 394
	my $oldestpid = 0;
	while (my ($pid, $aref) = each %child_vnodes) {
	    my ($vnode, $pnode, $mode, $jailed, $plab, $birthtime) = @$aref;
395
	    if ((!$oldestpid) || ($birthtime < $oldest)) {
396 397 398 399 400 401 402 403 404 405 406 407 408
		$oldest = $birthtime;
		$oldestpid = $pid;
	    }
	}

	#
	# Sanity check
	#
	if (!$oldest) {
	    die "*** $0\n".
	    	"Uh oh, I have no children left, something is wrong!\n";
	}

409 410 411 412 413
	#
	# If the oldest has already expried, just kill it off right now, and go
	# back around the loop
	#
	my $now = time();
Kirk Webb's avatar
Kirk Webb committed
414
	my $waittime = ($oldest + $childwait) - time();
415

416 417 418
	#
	# Kill of the oldest if he gets too old while we're waiting
	#
419
	local $SIG{ALRM} = sub { kill("TERM", $oldestpid); };
420 421 422 423 424
	if ($waittime <= 0) {
	    kill("TERM",$oldestpid);
	} else {
	    alarm($waittime);
	}
425 426

	my $childpid = wait();
427
	my $exitstatus = $?;
428

429 430
	alarm 0;

431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448
	#
	# Another sanity check
	#
	if ($childpid < 0) {
	    die "*** $0\n".
	    	"wait() returned <0, something is wrong!\n";
	}

	#
	# Look up to see what vnode, etc. this was associated with - if we
	# don't know about this child, ignore it
	#
	my $aref = $child_vnodes{$childpid};
	next unless @$aref;
	my ($vnode, $pnode, $mode, $jailed, $plab, $birthtime) = @$aref;
	$children--;
	delete $child_vnodes{$childpid};

449
	#
450
	# Look for setup failure, reported back through ssh.
451
	# 
452
	if ($exitstatus) {
453 454
	    print STDERR "vnode $vnode $mode on $pnode returned $?.\n"
		if $debug;
455

456
	    if ($exitstatus == 256) {
457
		print STDERR "$vnode is not running sshd.\n" if $debug;
458 459
	    }
	    elsif ($exitstatus == 15) {
460
		print STDERR "$vnode is wedged.\n" if $debug;
461
	    }
462 463 464
	    elsif ($exitstatus >> 8 == 99) {
		print STDERR "$vnode did not allocate properly.\n" if $debug;
	    }
465

466 467
	    push @failed_nodes, [$vnode, $pnode, $mode, $exitstatus];
	    
468 469
	    warn("*** $0:\n".
		 "    Virtual node $vnode $mode failure!\n");
470
	}
471

472 473 474 475 476 477 478 479 480 481
	if ($plab) {
	    #
	    # If the node was in the setup process, then mark its allocstate
	    # as down so os_setup knows not to bother waiting for it. DEAD
	    # is a temp state, different then DOWN. It indicates the node
	    # was never instantiated (important distinction for plab). 
	    #
	    if ($exitstatus &&
		(($mode eq "setup") || ($mode eq "reboot"))) {
		TBSetNodeAllocState($vnode, TBDB_ALLOCSTATE_DEAD());
482 483
	    }
	}
484 485 486
    }
}

487 488 489 490 491 492
#
# In force node, do not bother with this other stuff. 
#
exit(scalar(@failed_nodes))
    if ($force);

493 494 495 496 497 498
#
# Send mail to testbed-ops about failed nodes
#
if (@failed_nodes) { 
    my $failed_lines = join("\n",map { join("\t",@{$_}) } @failed_nodes);
    SENDMAIL($TBOPS, "Virtual Node failure for $pid/$eid",
499 500 501
	     "The following virtual nodes failed: \n" .
	     "vnode\t\tpnode\tmode\texit status\n" .
	     $failed_lines);
502 503
}

504 505 506 507 508 509
if ($killmode) {
    print STDOUT "Vnode teardown finished.\n";
}
else {
    print STDOUT "Vnode setup initiated on all nodes ...\n";
}
510
exit(0);