vnode_setup.in 11.3 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()
{
21
    print STDOUT "Usage: vnode_setup [-f] [-k] <pid> <eid> [node ...]\n";
22 23 24
    exit(-1);
}
my  $optlist = "fdk";
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 49 50

my $ssh		= "$TB/bin/sshtb -n";
my $debug       = 0;
my $force       = 0;
my $failed      = 0;
my $killmode    = 0;
my $dbuid;

51 52
my $MAX_CHILDREN = 8;

53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
#
# 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;
}
87 88
my $pid   = shift(@ARGV);
my $eid   = shift(@ARGV);
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106

#
# 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");
}

#
107 108
# Verify permission to muck with this experiment. Note that this script
# is run as root from the plab monitor daemon.
109
#
110
if ($UID && !TBAdmin($UID) &&
Leigh B. Stoller's avatar
Leigh B. Stoller committed
111 112 113
    !TBExptAccessCheck($UID, $pid, $eid, TB_EXPT_DESTROY)) {
    die("*** $0:\n".
	"    You do not have permission to mess with $pid/$eid!\n");
114 115 116
}

#
117
# Get the list of nodes in this experiment.
118
#
119 120
my @nodes = ExpNodes($pid, $eid);
if (! @nodes) {
121 122 123
    warn("*** $0:\n".
	 "    No allocated nodes in experiment $pid/$eid!\n");
    exit(0);
124
}
125 126

# Nodes on the command line. Operate only on this set.
127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151
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);
152 153 154 155

# Just the vnodes mam.
foreach my $node (@nodes) {
    my $pnode;
156
    my $jailed;
157
    my $plab;
158
    my $allocstate;
159
    my $mode = ($killmode ? "teardown" : "setup");
160

161
    if (! TBIsNodeVirtual($node, \$jailed, \$plab)) {
162 163
	next;
    }
164 165 166 167
    if (! TBPhysNodeID($node, \$pnode)) {
	die("*** $0:\n".
	    "    No physical node for $node!\n");
    }
168

169 170
    TBGetNodeAllocState($node, \$allocstate);

171 172 173
    #
    # On remote nodes, or when forcemode is on, always do the deed.
    # Otherwise, look at experiment state.
174 175
    #
    if (!$force) {
176 177 178 179
	if ($exptstate eq EXPTSTATE_SWAPPING) {
	    #
	    # When swapping, local vnodes go down with the physnode.
	    #
180 181 182 183 184
	    if (! TBIsNodeRemote($node)) {
		print "$node will $mode with local node $pnode.\n";
		next;
	    }
	    elsif ($allocstate eq TBDB_ALLOCSTATE_DOWN) {
185 186 187 188 189 190 191
		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";
		$mode = "cleanup";
192
	    }
Leigh B. Stoller's avatar
Leigh B. Stoller committed
193
	}
194 195
	elsif ($exptstate eq EXPTSTATE_ACTIVATING ||
	       $exptstate eq EXPTSTATE_MODIFY_RESWAP) {
196
	    #
197 198 199 200 201 202 203 204 205 206 207
	    # The allocstate determines if the vnode actually needs to
	    # be setup or torndown. Note that a failed experiment will
	    # cause a bunch of vnodes to be torndown, while in the
	    # ACTIVATING state. See os_setup and assign_wrapper; the
	    # idea is to avoid doing setup/teardown up vnodes on
	    # machines that are rebooting anyway, or that failed.
	    # Complicated by modify which could add/subtract a vnode on
	    # an existing machine, but not reboot the machine. Note that
	    # free (now unused) vnodes will land in RES_TEARDOWN. It is
	    # assumed that these booted okay, and need to be torndown,
	    # even though they are not RES_READY.
208
	    #
209 210 211
	    if (! TBIsNodeRemote($node)) {
		if ($killmode) {
		    if ($allocstate eq TBDB_ALLOCSTATE_DOWN) {
212 213 214 215
			print "$node failed to boot; skipping $mode.\n";
			next;
		    }
		    elsif ($allocstate eq TBDB_ALLOCSTATE_RES_INIT_CLEAN()) {
216 217 218
			print "$node never booted; skipping $mode.\n";
			next;
		    }
219 220 221 222
		    elsif ($allocstate eq TBDB_ALLOCSTATE_RES_READY()) {
			print "$node will $mode with local node $pnode.\n";
			next;
		    }
223 224
		}
		elsif ($allocstate eq TBDB_ALLOCSTATE_RES_READY()) {
225
		    print "$node is already setting up on local node $pnode\n";
226 227 228
		    next;
		}
	    }
229 230
	    else {
		if ($killmode) {
231 232 233
		    if ($allocstate eq TBDB_ALLOCSTATE_DEAD) {
			# plab only. See below.
			print "$node failed to initialize; skipping $mode.\n";
234 235
			next;
		    }
236 237 238 239 240 241 242 243 244
		    elsif ($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";
			$mode = "cleanup";
		    }
245 246 247 248
		    elsif ($allocstate eq TBDB_ALLOCSTATE_RES_INIT_CLEAN()) {
			print "$node never booted; skipping $mode.\n";
			next;
		    }
249
		}
250 251
		elsif ($allocstate eq TBDB_ALLOCSTATE_RES_READY()) {
		    print "$node is already set up on remote node $pnode\n";
252 253
		    next;
		}
254
		elsif ($allocstate eq TBDB_ALLOCSTATE_RES_INIT_DIRTY()) {
255
		    print "$node needs a reboot on remote node $pnode\n";
256 257
		    $mode = "reboot";
		}
258 259
	    }
	}
Leigh B. Stoller's avatar
Leigh B. Stoller committed
260 261 262 263 264 265
    }

    #
    # When setting up a vnode, force its event state into SHUTDOWN since
    # no telling what its initial state is. 
    # 
266
    if ($mode eq "teardown" || $mode eq "reboot") {
Leigh B. Stoller's avatar
Leigh B. Stoller committed
267 268
	TBSetNodeEventState($node, TBDB_NODESTATE_SHUTDOWN);
    }
269 270

    #
271 272 273 274 275 276
    # Put this into the list of calls we have to make in the next loop
    #
    push @vnodes, [$node, $pnode, $mode, $jailed, $plab];

}

Kirk Webb's avatar
 
Kirk Webb committed
277

278 279 280 281 282 283 284 285 286 287 288
my $children = 0;
my %child_vnodes = ();
while (1) {

    #
    # We're done when we've hit the last vnode, and we've outlived all of our
    # children
    #
    if ((!@vnodes) && ($children == 0)) {
	last;
    }
289

290 291 292
    #
    # There are more free slots
    #
293
    if (($children <= $MAX_CHILDREN) && @vnodes) {
294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317
	#
	# 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 {
Kirk Webb's avatar
 
Kirk Webb committed
318
            my $exval = 0;
319 320 321
	    # Must change our real UID to root so that ssh will work.
	    $UID = 0;

322
	    if ($plab && $mode eq "setup") {
Kirk Webb's avatar
 
Kirk Webb committed
323 324 325
		if (TBForkCmd("$TB/sbin/plabnode alloc $pid $eid $vnode", 1)) {
		    print STDERR "*** $0:\n" .
                        "    Plab node allocation failed\n";
326 327 328 329
		    # Should check DB state instead.
		    exit(99);
		}
	    }
330

331 332 333 334 335 336 337
	    # 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 ";
Kirk Webb's avatar
 
Kirk Webb committed
338 339 340 341 342 343 344 345 346 347 348 349
                
		$exval = TBForkCmd("$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);
350 351 352 353 354 355 356 357 358 359 360
	}
    } 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.
	#
361
	my $oldest;
362 363 364
	my $oldestpid = 0;
	while (my ($pid, $aref) = each %child_vnodes) {
	    my ($vnode, $pnode, $mode, $jailed, $plab, $birthtime) = @$aref;
365
	    if ((!$oldestpid) || ($birthtime < $oldest)) {
366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381
		$oldest = $birthtime;
		$oldestpid = $pid;
	    }
	}

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

	#
	# Kill of the oldest if he gets too old while we're waiting
	#
382 383
	local $SIG{ALRM} = sub { kill("TERM", $oldestpid); };
	alarm(($oldest + 120) - time());
384 385

	my $childpid = wait();
386
	my $exitstatus = $?;
387 388
	alarm 0;

389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406
	#
	# 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};

407
	#
408
	# Look for setup failure, reported back through ssh.
409
	# 
410
	if ($exitstatus) {
411 412
	    print STDERR "vnode $vnode $mode on $pnode returned $?.\n"
		if $debug;
413

414
	    if ($exitstatus == 256) {
415
		print STDERR "$vnode is not running sshd.\n" if $debug;
416 417
	    }
	    elsif ($exitstatus == 15) {
418
		print STDERR "$vnode is wedged.\n" if $debug;
419
	    }
420 421 422
	    elsif ($exitstatus >> 8 == 99) {
		print STDERR "$vnode did not allocate properly.\n" if $debug;
	    }
423

424 425
	    push @failed_nodes, [$vnode, $pnode, $mode, $exitstatus];
	    
426 427
	    warn("*** $0:\n".
		 "    Virtual node $vnode $mode failure!\n");
428
	}
429

430 431 432 433 434 435 436 437 438 439
	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());
440 441
	    }
	}
442 443 444
    }
}

445 446 447 448 449 450
#
# In force node, do not bother with this other stuff. 
#
exit(scalar(@failed_nodes))
    if ($force);

451 452 453 454 455 456
#
# 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",
457 458 459
	     "The following virtual nodes failed: \n" .
	     "vnode\t\tpnode\tmode\texit status\n" .
	     $failed_lines);
460 461
}

462 463 464 465 466 467
if ($killmode) {
    print STDOUT "Vnode teardown finished.\n";
}
else {
    print STDOUT "Vnode setup initiated on all nodes ...\n";
}
468
exit(0);