contrib/check_snmp_procs.pl

   1 #!/usr/bin/perl -w
   2 #
   3 # check_snmp_procs.pl
   4 #    Nagios script to check processes on remote host via snmp
   5 #
   6 #
   7 # Copyright (c) 2003 David Alden
   8 #
   9 # This program is free software; you can redistribute it and/or
  10 # modify it under the terms of the GNU General Public License
  11 # as published by the Free Software Foundation; either version 2
  12 # of the License, or (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program; if not, write to the Free Software
  21 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22 #
  23 #
  24 # History
  25 # -------
  26 #  02-25-2003 - Dave Alden <alden@math.ohio-state.edu>
  27 #    Initial creation
  28 #
  29 #
  30 # TODO
  31 # ----
  32 #    make it work with snmp version 3
  33 #    Suggestions???
  34 #
  35 #use strict;
  36 use Getopt::Long;
  37 use Net::SNMP qw (oid_lex_sort oid_base_match SNMP_VERSION_1);
  38 use lib "/usr/local/nagios/libexec";
  39 use utils qw(%ERRORS &print_revision &support &usage);
  40
  41 my $PROGNAME="check_snmp_procs";
  42 my $REVISION="1.0";
  43
  44 #
  45 my $opt_authprotocol;
  46 my $opt_authpassword;
  47 my $opt_community    = 'ma4read';
  48 my $opt_critical;
  49 my $opt_help;
  50 my $opt_host         = 'euler';
  51 my $opt_oidname      = 'hrSWRunName';
  52 my $opt_port         = 161;
  53 my $opt_privpassword;
  54 my $opt_regexp       = 0;
  55 my $opt_snmp_version = '2c';
  56 my $opt_timeout      = $utils::TIMEOUT;
  57 my $opt_username;
  58 my $opt_verbose;
  59 my $opt_version;
  60 my $opt_wanted_procs;
  61 my $opt_warning;
  62
  63 #
  64 my $max_no_processes = 999999;
  65 my $session;
  66 my $error;
  67 my $no_procs;
  68 my $exit_status;
  69
  70 #
  71 my @wanted_procs;
  72 my %current_process_list;
  73
  74 #
  75 my %OIDS = (hrSWRunName => '1.3.6.1.2.1.25.4.2.1.2',
  76             hrSWRunPath => '1.3.6.1.2.1.25.4.2.1.4');
  77
  78 my %OIDS_L = (hrSWRunName => length($OIDS{hrSWRunName}),
  79               hrSWRunPath => length($OIDS{hrSWRunPath}));
  80
  81 #
  82 $ENV{'PATH'}='';
  83 $ENV{'BASH_ENV'}='';
  84 $ENV{'ENV'}='';
  85
  86 #
  87 Getopt::Long::Configure('bundling');
  88 if (GetOptions(
  89         "a:s" => \$opt_authprotocol,  "authprotocol:s"  => \$opt_authprotocol,
  90         "A:s" => \$opt_authpassword,  "authpassword:s"  => \$opt_authpassword,
  91         "C:s" => \$opt_community,     "community:s"     => \$opt_community,
  92         "c:s" => \$opt_critical,      "critical:s"      => \$opt_critical,
  93         "h"   => \$opt_help,          "help"            => \$opt_help,
  94         "H:s" => \$opt_host,          "hostname:s"      => \$opt_host,
  95         "o:s" => \$opt_oidname,       "oidname:s"       => \$opt_oidname,
  96         "P=s" => \$opt_password,      "password=s"      => \$opt_password,
  97         "p=i" => \$opt_port,          "port=i"          => \$opt_port,
  98         "r"   => \$opt_regexp,        "regexp"          => \$opt_regexp,
  99         "S"   => \$opt_snmp_version,  "snmpversion"     => \$opt_snmp_version,
 100         "t=i" => \$opt_timeout,       "timeout=i"       => \$opt_timeout,
 101         "U=s" => \$opt_username,      "username=s"      => \$opt_username,
 102         "v"   => \$opt_verbose,       "verbose"         => \$opt_verbose,
 103         "V"   => \$opt_version,       "version"         => \$opt_version,
 104         "N=s" => \$opt_wanted_procs,  "names=s"         => \$opt_wanted_procs,
 105         "w:s" => \$opt_warning,       "warning:s"       => \$opt_warning)
 106     == 0) {
 107         print_usage();
 108         exit $ERRORS{'UNKNOWN'};
 109 }
 110
 111 if ($opt_version) {
 112         print_revision($PROGNAME, "\$Revision: 1771 $REVISION \$");
 113         exit $ERRORS{'OK'};
 114 }
 115
 116 if ($opt_help) {
 117         print_help();
 118         exit $ERRORS{'OK'};
 119 }
 120
 121 if (! utils::is_hostname($opt_host)){
 122         usage();
 123         exit $ERRORS{'UNKNOWN'};
 124 }
 125
 126 ($longest_wanted, @wanted_procs) = parse_wanted_procs($opt_verbose, $opt_wanted_procs, $opt_warning, $opt_critical);
 127
 128 $SIG{'ALRM'} = sub {
 129         print "Timeout: No Answer from Client\n";
 130         exit $ERRORS{'UNKNOWN'};
 131 };
 132 alarm($opt_timeout);
 133
 134 ($longest_current, %current_process_list) = get_process_list($opt_verbose, $opt_host, $opt_username, $opt_privpassword, $opt_authprotocol, $opt_authpassword, $opt_community, $opt_port, $opt_oidname, $opt_snmp_version);
 135
 136 $exit_status = compare_process_list($opt_regexp, \%current_process_list, @wanted_procs);
 137
 138 if ($opt_verbose) {
 139         print_info($longest_current, \%current_process_list, $longest_wanted, @wanted_procs);
 140 }
 141
 142 exit($exit_status);
 143
 144
 145 #
 146 sub compare_process_list {
 147
 148         my($regexp, $current_process_list, @wanted_procs) = @_;
 149         my($proc, $i, $no_running_procs, @warning, @critical);
 150         my $exit = $ERRORS{'OK'};
 151
 152         for ($i = 0; $i <= $#wanted_procs; $i++) {
 153
 154                 $proc = $wanted_procs[$i];
 155
 156                 $no_running_procs = get_running_procs($regexp, $$proc{name}, $current_process_list);
 157
 158                 $$proc{no_matches} += $no_running_procs;
 159
 160                 if (($no_running_procs >= $$proc{warn_low}) &&
 161                     ($no_running_procs <= $$proc{warn_high})) {
 162
 163                         push(@warning, $$proc{name} . "($no_running_procs)");
 164
 165                         if ($exit != $ERRORS{'CRITICAL'}) {
 166                                 $exit = $ERRORS{'WARNING'};
 167                         }
 168
 169                 } elsif (($no_running_procs < $$proc{minimum}) ||
 170                          ($no_running_procs >= $$proc{critical_low}) &&
 171                          ($no_running_procs <= $$proc{critical_high})) {
 172
 173                         push(@critical, $$proc{name} . "($no_running_procs)");
 174
 175                         $exit = $ERRORS{'CRITICAL'};
 176                 }
 177         }
 178
 179         print "SNMPPROC ";
 180
 181         if ($#critical >= 0) {
 182                 print "CRITICAL:";
 183         } elsif ($#warning >= 0) {
 184                 print "WARNING:";
 185         } else {
 186                 print "OK";
 187         }
 188
 189         foreach $i (@critical) {
 190                 print " $i";
 191         }
 192
 193         if (($#critical >= 0) &&
 194             ($#warning >= 0)) {
 195                 print "  WARNING:";
 196         }
 197
 198         foreach $i (@warning) {
 199                 print " $i";
 200         }
 201
 202         print "\n";
 203
 204         return $exit;
 205 }
 206
 207
 208 #
 209 sub get_running_procs {
 210
 211         my($regex, $name, $process_list) = @_;
 212         my $count = 0;
 213         my $process;
 214
 215         $count = 0;
 216
 217         if ($regex) {
 218
 219                 foreach $process (keys %{$process_list}) {
 220
 221                         if ($process =~ /$name/) {
 222                                 $count += $$process_list{$process};
 223                         }
 224                 }
 225
 226
 227         } else {
 228
 229                 if (!defined($count = $$process_list{$name})) {
 230                         $count = 0;
 231                 }
 232         }
 233
 234         return $count;
 235 }
 236
 237
 238 #
 239 sub get_process_list {
 240
 241         my($verbose, $host, $username, $privpassword, $authprotocol, $authpassword, $community, $port, $oidname, $snmp_version) = @_;
 242         my(%process_list, %process_pid_list, $result);
 243         my $process_list_longest = 1, $not_done = 1;
 244         my(@args, @oids, $oid, $name);
 245
 246         ($session, $error) = Net::SNMP->session(
 247                 -hostname      =>  $host,
 248                 -community     =>  $community,
 249                 -port          =>  $port,
 250                 -version       =>  $snmp_version,
 251                 defined($privpassword) ? (-privpassword  =>  $privpassword) : (),
 252                 defined($authpassword) ? (-authpassword  =>  $authpassword) : (),
 253                 defined($authprotocol) ? (-authprotocol  =>  $authprotocol) : (),
 254                 defined($username)     ? (-username      =>  $username) : ());
 255
 256         if (!defined($session)) {
 257                 print ("UNKNOWN: $error\n");
 258                 exit $ERRORS{'UNKNOWN'};
 259         }
 260
 261         @args = (-varbindlist => [$OIDS{$oidname}]);
 262
 263         if ($session->version == SNMP_VERSION_1) {
 264
 265                 while (defined($session->get_next_request(@args))) {
 266
 267                         $oid = (keys(%{$session->var_bind_list}))[0];
 268
 269                         last if (!oid_base_match($OIDS{$oidname}, $oid));
 270
 271                         $name = $session->var_bind_list->{$oid};
 272                         $process_list{$name}++;
 273
 274                         if ($verbose && ($process_list_longest < length($name))) {
 275                                 $process_list_longest = length($name);
 276                         }
 277
 278                         @args = (-varbindlist => [$oid]);
 279                 }
 280
 281         } else {
 282
 283                 push(@args, -maxrepetitions => 25);
 284
 285                 while ($not_done && defined($session->get_bulk_request(@args))) {
 286
 287                         @oids = oid_lex_sort(keys(%{$session->var_bind_list}));
 288
 289                         foreach $oid (@oids) {
 290                                 if (!oid_base_match($OIDS{$oidname}, $oid)) {
 291
 292                                         $not_done = 0;
 293
 294                                 } else {
 295
 296                                         $name = $session->var_bind_list->{$oid};
 297                                         $process_list{$name}++;
 298
 299                                         if ($verbose && ($process_list_longest < length($name))) {
 300                                                 $process_list_longest = length($name);
 301                                         }
 302
 303                                         if ($session->var_bind_list->{$oid} eq 'endOfMibView') {
 304                                                 $not_done = 0;
 305                                         }
 306                                 }
 307                         }
 308
 309                         if ($not_done) {
 310                                 @args = (-maxrepetitions => 25, -varbindlist => [pop(@oids)]);
 311                         }
 312                 }
 313         }
 314
 315         if ($session->error() ne '') {
 316                 print ("UNKNOWN: " . $session->error() . "\n");
 317                 exit $ERRORS{'UNKNOWN'};
 318         }
 319
 320         $session->close;
 321
 322         return($process_list_longest, %process_list);
 323 }
 324
 325
 326 #
 327 sub parse_wanted_procs {
 328
 329         my($verbose, $wanted_procs, $warning, $critical) = @_;
 330
 331         my(@procs, $process, $i, $critical_low, $critical_high, $warn_low, $warn_high, $process_name, $process_min);
 332         my(@process_array, @warn_array, @critical_array);
 333         my $exit = 0;
 334         my $longest_name = 1;
 335
 336         if (defined($wanted_procs)) {
 337                 @process_array = split(/,/, $wanted_procs);
 338         }
 339
 340         if (defined($warning)) {
 341                 @warn_array = split(/,/, $warning);
 342         }
 343
 344         if (defined($critical)) {
 345                 @critical_array = split(/,/, $critical);
 346         }
 347
 348         if( defined($warning) && $#process_array != $#warn_array ) {
 349
 350                 print "Error: Number of entries in process list($#process_array) and warn list($#warn_array) don't match\n";
 351                 exit $ERRORS{'UNKNOWN'};
 352         }
 353
 354         if( defined($critical) && $#process_array != $#critical_array ) {
 355
 356                 print "Error: Number of entries in process list and critical list don't match\n";
 357                 exit $ERRORS{'UNKNOWN'};
 358         }
 359
 360         for ($i = 0; $i <= $#process_array; $i++) {
 361
 362                 if ((($process_name, $process_min) = split(/:/, $process_array[$i])) != 2) {
 363
 364                         $process_min = 1;
 365                 }
 366
 367                 if ($verbose && ($longest_name < length($process_name))) {
 368
 369                         $longest_name = length($process_name);
 370                 }
 371
 372                 if (defined($critical_array[$i])) {
 373                         if ((($critical_low, $critical_high) = split(/:/, $critical_array[$i])) != 2) {
 374
 375                                 $critical_high = $critical_low;
 376
 377                         } else {
 378
 379                                 if ($critical_high eq "") {
 380                                         $critical_high = $max_no_processes;
 381                                 }
 382
 383                                 if ($critical_low eq "") {
 384                                         $critical_low = 0;
 385                                 }
 386                         }
 387                 } else {
 388
 389                         $critical_low = -1;
 390                         $critical_high = -1;
 391                 }
 392
 393                 if (defined($warn_array[$i])) {
 394                         if ((($warn_low, $warn_high) = split(/:/, $warn_array[$i])) != 2) {
 395
 396                                 $warn_high = $warn_low;
 397
 398                         } else {
 399
 400                                 if ($warn_high eq "") {
 401                                         $warn_high = $max_no_processes;
 402                                 }
 403
 404                                 if ($warn_low eq "") {
 405                                         $warn_low = 0;
 406                                 }
 407                         }
 408                 } else {
 409
 410                         $warn_low = -1;
 411                         $warn_high = -1;
 412                 }
 413
 414                 if ($critical_low > $critical_high) {
 415                         print "Error: $process_name critical low($critical_low) is larger than high($critical_high)\n";
 416                         $exit = 1;
 417                 }
 418
 419                 if ($warn_low > $warn_high) {
 420                         print "Error: $process_name warn low($warn_low) is larger than high($warn_high)\n";
 421                         $exit = 1;
 422                 }
 423
 424                 if (@critical_array &&
 425                     ($process_min > $critical_low)) {
 426                         print "Error: $process_name minimum($process_min) is larger than critical low($critical_low)\n";
 427                         $exit = 1;
 428                 }
 429
 430                 if (@warn_array &&
 431                     ($process_min > $warn_low)) {
 432                         print "Error: $process_name minimum($process_min) is larger than warn low($warn_low)\n";
 433                         $exit = 1;
 434                 }
 435
 436                 if (@warn_array && @critical_array &&
 437                     ((($warn_low >= $critical_low) && ($warn_low <= $critical_high)) ||
 438                      (($warn_high >= $critical_low) && ($warn_high <= $critical_high)))) {
 439
 440                         print "Error: $process_name warn levels($warn_low:$warn_high) overlap with critical levels($critical_low:$critical_high)\n";
 441                         $exit = 1;
 442                 }
 443
 444                 push(@procs,{
 445                         name          => $process_name,
 446                         critical      => defined($critical),
 447                         critical_low  => $critical_low,
 448                         critical_high => $critical_high,
 449                         minimum       => $process_min,
 450                         warning       => defined($warning),
 451                         warn_low      => $warn_low,
 452                         warn_high     => $warn_high});
 453         }
 454
 455         if ($exit) {
 456                 exit $ERRORS{'UNKNOWN'};
 457         }
 458
 459         return($longest_name, @procs);
 460 }
 461
 462
 463 #
 464 sub print_info {
 465
 466         my ($longest_current, $current_process_list, $longest_wanted, @wanted_procs) = @_;
 467
 468         if ($longest_wanted < 7) {
 469                 $longest_wanted = 7;
 470         } else {
 471                 $longest_wanted++;
 472         }
 473
 474         printf("%s---------------------------------------------\n", "-" x $longest_wanted);
 475         printf("|%-" . $longest_wanted . "s |      |  Min |     Warn    |   Critical  |\n", "Process");
 476         printf("|%-" . $longest_wanted . "s | Qty  | Procs|  Low | High |  Low | High |\n", "Name");
 477         printf("%s---------------------------------------------\n", "-" x $longest_wanted);
 478
 479         for (my $temp=0; $temp <= $#wanted_procs; $temp++) {
 480
 481                 printf("|%-" . $longest_wanted . "s |%6d|%6d|%6d|%6d|%6d|%6d|\n",
 482                         $wanted_procs[$temp]{name},
 483                         $wanted_procs[$temp]{no_matches},
 484                         $wanted_procs[$temp]{minimum},
 485                         $wanted_procs[$temp]{critical_low},
 486                         $wanted_procs[$temp]{critical_high},
 487                         $wanted_procs[$temp]{warn_low},
 488                         $wanted_procs[$temp]{warn_high});
 489         }
 490
 491         printf("%s---------------------------------------------\n\n", "-" x $longest_wanted);
 492
 493         if ($longest_current < 7) {
 494                 $longest_current = 7;
 495         } else {
 496                 $longest_current++;
 497         }
 498
 499         printf("%s----------\n", "-" x $longest_current);
 500         printf("|%-" . $longest_current . "s |  Qty |\n", "Process");
 501         printf("%s----------\n", "-" x $longest_current);
 502
 503         foreach my $result (sort keys %{$current_process_list}) {
 504
 505                 printf("|%-" . $longest_current . "s |%6d|\n", $result,
 506                         $current_process_list{$result});
 507         }
 508         printf("%s----------\n", "-" x $longest_current);
 509
 510         return;
 511 }
 512
 513
 514 #
 515 sub print_usage {
 516     print "Usage:
 517  $PROGNAME -H <host> [-r] [-v]
 518                   -N <processname>[:minimum][,<processname>[:minimum] ...]
 519                   [-a <authprotocol>] [-A <authpassword>]
 520                   [-U <username>] [-P <password>]
 521                   [-o <oidname>] [ -S <snmpversion> ]
 522                   [-C <snmp_community>] [-p <port>] [-t <timeout>]
 523                   [-w <low>:<high>[,<low>:<high> ...]
 524                   [-c <low>:<high>[,<low>:<high> ...]
 525        $PROGNAME (-h | --help) for detailed help
 526        $PROGNAME (-V | --version) for version information\n";
 527 }
 528
 529
 530 #
 531 sub print_help {
 532         print_revision($PROGNAME, "\$Revision: 1771 $REVISION \$");
 533         print "Copyright (c) 2003 David Alden
 534
 535 Check if processes are running on a host via snmp
 536
 537 ";
 538
 539         print_usage();
 540
 541         print "
 542 -a, --authprotocol=<authprotocol>
 543    Set the authentication protocol used for authenticated SNMPv3 messages
 544 -A, --authpassword=<authpassword>
 545    Set the authentication pass phrase used for authenticated SNMPv3 messages
 546 -c, --critical=<low>:<high>[,<low>:<high> ...]
 547    exit with CRITICAL status if number of processes is between <low> and <high>
 548 -C, --community=<snmp_community>
 549    SNMP read community (default: $opt_community)
 550 -h, --help
 551    Show this help screen
 552 -H, --host=<host>
 553    Check processes on the indiciated host
 554 -o, --oidname=<oidname>
 555    Which oid tree to search, hrSWRunName or hrSWRunPath (default: $opt_oidname)
 556 -p, --port=<port>
 557    Make connection on the indicated port (default: $opt_port)
 558 -N, --names=<processname>[:<minimum>][,<processname>[:<minimum>] ...]
 559    Process names to check, (optional) minimum number of processes (default: 1)
 560 -P, --password=<privpassword>
 561    Set the privacy pass phrase used for encrypted SNMPv3 messages
 562 -r, --regex
 563    Use regular expression match for <process>
 564 -S, --snmpversion
 565    Use snmp version specified (values: 1|2c|3, default: $opt_snmp_version)
 566 -t, --timeout
 567    Plugin time out in seconds (default: $opt_timeout)
 568 -U, --username=<securityname>
 569    Set the securityname used for encrypted SNMPv3 messages
 570 -v, --verbose
 571    Print some extra debugging information (not advised for normal operation)
 572 -V, --version
 573    Show version and license information
 574 -w, --warning=<low>:<high>[,<low>:<high> ...]
 575    exit with WARNING status if number of processes is between <low> and <high>
 576
 577
 578 A CRITICAL error will be indicated unless there are at least <minimum> number
 579 of processes running (unless <minimum> is set to 0 -- useful if you don't
 580 mind that there are none of the processes running).
 581
 582 If no processes are specified, the program will still connect to the remote
 583 host and download the current list of running processes.  It will then exit
 584 with an OK (unless it wasn't able to connect) -- useful if you want to make
 585 sure that the remote snmpd process is running and returning a list of procs.
 586
 587
 588 ";
 589         support();
 590 }