File: sitesummary-nodes

package info (click to toggle)
sitesummary 0.1.28%2Bdeb9u1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 488 kB
  • sloc: perl: 1,765; sh: 802; makefile: 84
file content (598 lines) | stat: -rwxr-xr-x 20,908 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
#!/usr/bin/perl
#
# Generate list of nodes to load from /etc/munin/munin.conf to check
# all the machines reporting to sitesummary.

use strict;
use warnings;

use SiteSummary;
use Getopt::Std;
use Socket;
use File::Temp qw(tempfile);
use vars qw($npingwarn $npingwarnp $npingcrit $npingcritp);

sub usage {
    print <<EOF;
Usage: $0 [-hmnw]

 -h  Show usage information
 -m  Generate munin configuration for all munin clients
 -n  Generate nagios configuration for all nagios clients
 -w  List all client DNS/IP-addresses and MAC addresses
EOF
}

$npingwarn = 100.0;
$npingwarnp = 20; # percent
$npingcrit = 500.0;
$npingcritp = 60; # percent

# Idea for way to provide overrides for the functions in this script
my $conffile = "/etc/sitesummary/sitesummary-nodes.conf";
eval 'require "$conffile"';
if ($@ && $@ !~ qr{^Can't locate $conffile}) {
    die $@;
};

my %opts;
getopts("hmnw", \%opts) || (usage(), exit(1));

my $nagiosignorefile = "/etc/sitesummary/nagiosignore";
my %nagios_ignore;

my %hostnames;
my $server_hostid = get_localhost_hostid() ||
    die "Unable to figure out hostid for the local host";

for_all_hosts(\&handle_host);

if ($opts{'h'}) {
    usage();
    exit 0;
} elsif ($opts{'m'}) {
    print_munin_list();
} elsif ($opts{'w'}) {
    print_ip_hw_list();
} elsif ($opts{'n'}) {
    if (open(my $fh, $nagiosignorefile)) {
        while (<$fh>) {
            chomp;
            my ($hostname, $nagioscheck) = split(/ /, $_, 2);
            $nagios_ignore{"$hostname $nagioscheck"} = 1;
        }
        close $fh;
    }
    generate_nagios_config();
} else {
    print_list();
}
exit 0;

sub handle_host {
    my $hostid = shift;
    my $address = get_dns_address($hostid);
    $hostnames{$address} = $hostid;
}

sub print_list {
    for my $hostname (sort keys %hostnames) {
        print "$hostname\n";
    }
}

sub get_localhost_hostid {
    my ($fh, $filename) = tempfile();
    `/sbin/ifconfig -a > $filename`;
    my $localhost_hostid = get_unique_ether_id($filename);
    unlink $filename;
    return $localhost_hostid;
}

# Get an IP address, try to resolve it in DNS , and return the IP
# address if no DNS reverse entry was found.
sub get_dnsnameorip {
    my $ipaddr = shift;
    my $resolved;
    $resolved = gethostbyaddr(inet_aton($ipaddr), AF_INET);
    return $resolved || $ipaddr;
}

sub is_munin_client {
    my $hostid = shift;
    return is_pkg_installed($hostid, "munin-node");
}

sub is_nagios_client {
    my $hostid = shift;
    return is_pkg_installed($hostid, "nagios-nrpe-server") ||
        is_pkg_installed($hostid, "nagios-text") ||
        is_pkg_installed($hostid, "nagios2") ||
        is_pkg_installed($hostid, "nagios3") ||
        is_pkg_installed($hostid, "icinga");
}

sub print_munin_list {
    for my $hostname (sort keys %hostnames) {
        next unless (is_munin_client($hostnames{$hostname}));

    # Using hostname as address, to avoid hardcoding IP addresses in
    # the file.  Might be an idea to fetch the IP address from
    # system/ifconfig-a
        print <<EOF;
[$hostname]
    address $hostname
    use_node_name yes

EOF
    }
}

sub print_ip_hw_list {
    for my $hostname (sort keys %hostnames) {
        my $macaddress = get_primary_macaddress($hostnames{$hostname});
        print "$hostname $macaddress\n";
    }
}

sub is_remote_nagios_client {
    my $hostid = shift;
    return is_pkg_installed($hostid, "nagios-nrpe-server") &&
        $server_hostid ne $hostid;
}

# Return information about the switches connected to a given host, as
# reported by cdpr (and perhaps lldp in the future?)
sub get_switch_info {
    my $hostid = shift;
    my %switch = ();
    my $ifconfigoutput = get_filepath_current($hostid, "/system/ifconfig-a");
    my %ifs;
    open(IFCONFIG, $ifconfigoutput) || return ();
    while (<IFCONFIG>) {
        chomp;
        $ifs{$1} = 1
            if (m/^(\w+)\s+Link encap:Ethernet  HWaddr (\S+)/
                || m/^(\w+): flags=\S+<UP,BROADCAST/);
    }
    close (IFCONFIG);
    for my $if (sort keys %ifs) {
        my $path = get_filepath_current($hostid, "/system/cdpr.$if");
        my ($id, $addr);
        if (open(my $fh, $path)) {
            while (<$fh>) {
                chomp;
                if (m/^Device ID$/) {
                    $id = <$fh>;
                    chomp $id;
                    $id =~ s/^\s+value:\s+(\S)\s*/$1/;
                }
                if (m/^Addresses$/) {
                    $addr = <$fh>;
                    chomp $addr;
                    $addr =~ s/^\s+value:\s+(\S)\s*/$1/;
                    $switch{$addr} = $id;
                }
            }
            close($fh);
        }
    }
    return %switch ? %switch : ();
}


sub is_remote_nrpe_config_active {
    my $hostid = shift;

    my $path = get_filepath_current($hostid, "/nagios/sitesummary-nrpe.cfg");
    if (open(my $fh, $path)) {
        while (<$fh>) {
            if (m/^dont_blame_nrpe=1$/) {
                close($fh);
                return "args";
            }
        }
        close($fh);
        return "noargs";
    }
    return undef;
}


sub print_nagios_service_check {
    my ($remote, $hostname, $description, $check, $check_args) = @_;
    my $template = "server-service";

    return if exists $nagios_ignore{"$hostname $description"};
    my $cmd;
    if ($remote) {
        $cmd = "check_nrpe!$check";
        if (defined $check_args) {
            $check_args =~ s/!/ /g;
            $cmd .= " -a $check_args";
        }
    } else {
        $cmd = "$check";
        $cmd .= "!$check_args" if defined $check_args;
    }
    print <<EOF;
define service {
        use                 $template;
        host_name           $hostname
        service_description $description
        check_command       $cmd
}
EOF
}

sub nagios_hostgroup_namewash {
    my $name = shift;
    $name =~ s/[^0-9a-zA-Z_-]+/-/g; # Avoid illegal characteres
    return $name;
}

sub print_nagios_hostgroup {
    my ($name, $alias) = @_;

    print <<EOF;
define hostgroup {
        hostgroup_name      $name
EOF
    print "        alias           $alias\n" if $alias;
    print "}\n";
}

sub print_nagios_host_check {
    my ($template, $hostname, $address, $parent, @hostgroups) = @_;
    $template = $template || "server-host";
    print <<EOF;
##################### $hostname #######################
define host {
        use                 $template
        host_name           $hostname
        address             $address
EOF
    print "        parents             $parent\n" if ($parent);
    if (@hostgroups) {
        print "        hostgroups          " . join(",", @hostgroups), "\n";
    }
    print "}\n";
}

sub generate_nagios_config {
    my %hosts;
    my %hostgroup;
    for my $hostname (sort keys %hostnames) {
        my @groups = ();
        my $hostid = $hostnames{$hostname};

        my $address = get_dns_address($hostid);
        my $localhostname = get_localhostname($hostid);

        unless (defined $address && defined $localhostname) {
            print "# Skipping ID $hostid without hostname and address\n";
            next;
        }

        my $redirect = "";
        my $nagiosclient = is_nagios_client($hostid);
        my $remote = is_remote_nagios_client($hostid);
        my $nrpestatus = is_remote_nrpe_config_active($hostid);

        # Only check laptops that have the nagios tools installed
        if (is_laptop($hostid) && ! $remote && ! $nagiosclient) {
            print "# Skipping laptop $hostname\n";
            next;
        }

        # Only check hosts missing in DNS if they have the nagios
        # tools installed.
        if ($hostname =~ m/^[\d\.:]+$/ && ! $remote && ! $nagiosclient) {
            print "# Skipping host $hostname missing in DNS\n";
            next;
        }

        my $site = get_site($hostid) || "none";
        my $sitegroup = get_sitegroup($hostid);
        my $debversion = get_debian_ver($hostid);
        my $eduprofile = get_debian_edu_profile($hostid);
        my $eduversion = get_debian_edu_ver($hostid);
        push(@groups, nagios_hostgroup_namewash("site-$site"));
        if ($sitegroup) {
            push(@groups, nagios_hostgroup_namewash("site-$site-$sitegroup"));
        }
        push(@groups, nagios_hostgroup_namewash("debian-version-$debversion"))
            if defined $debversion;
        if ($eduprofile) {
            $eduprofile =~ s/^"|"$//g; # Remove "" around the values
            for my $profile (split(/,\s*/, $eduprofile)) {
                push(@groups,
                     nagios_hostgroup_namewash("edu-profile-$profile"));
            }
        }
        if ($eduversion) {
            $eduversion =~ s/^"|"$//g; # Remove "" around the values
            push(@groups, nagios_hostgroup_namewash("edu-version-$eduversion"));
        }

        my $hostclass = get_hostclass($hostid) || "none";
        push(@groups, nagios_hostgroup_namewash("hostclass-$hostclass"));

        for my $group ( @groups ) {
            $hostgroup{$group} = 1;
        }
        my $defaultrouteip = get_default_route($hostid);
        my $defaultroute;
        $defaultroute = get_dnsnameorip($defaultrouteip)
            if defined $defaultroute;

        # Also check default route host
        if (defined $defaultroute && !exists $hosts{$defaultroute}) {
            print_nagios_host_check(undef, $defaultroute, $defaultroute,
                                    undef, "router");
            $hosts{$defaultroute} = $defaultroute;
            $hostgroup{"router"} = 1;
            print_nagios_service_check(0, $defaultroute, "ping",
                                       "check_ping",
                                       sprintf("%.1f,%d%%!%.1f,%d%%",
                                               $npingwarn, $npingwarnp,
                                               $npingcrit, $npingcritp));
        }

        my %switch = get_switch_info($hostid);
        my @parents = ();
        for my $addr (keys %switch) {
            $hostgroup{"switch"} = 1;
            print_nagios_host_check("switch-host", $switch{$addr}, $addr,
                                    undef, "switch")
                unless (exists $hosts{$switch{$addr}});
            $hosts{$switch{$addr}} = $addr;
            push(@parents, $switch{$addr}) if $remote;
        }

        print_nagios_host_check(undef, $hostname, $address,
                                join(",", @parents), @groups)
            unless (exists $hosts{$hostname});
        $hosts{$hostname} = $address;

        # first, check ping to see if the other checks should be performed
        print_nagios_service_check(0, $hostname, "ping",
                                   "check_ping",
                                   sprintf("%.1f,%d%%!%.1f,%d%%",
                                           $npingwarn, $npingwarnp,
                                           $npingcrit, $npingcritp));

        my %tcpservices =
        (
         139  => { name => 'samba',   package => 'samba' },
         389  => { name => 'ldap',    package => 'slapd' },
         4949 => { name => 'munin',   package => 'munin-node' },
         );

        for my $port (sort { $a <=> $b } keys %tcpservices) {
            next if (exists $tcpservices{$port}->{package} && !
                     is_pkg_installed($hostid,
                                      $tcpservices{$port}->{package}));
            my $servicename = $tcpservices{$port}->{name};
            print_nagios_service_check(0, $hostname, $servicename,
                                       "check_tcp", $port);
        }

        # Check SSH server
        print_nagios_service_check(0, $hostname, "ssh",
                                   "check_ssh")
            if is_pkg_installed($hostid, "openssh-server");

        print_nagios_service_check(0, $hostname, "http",
                                   "check_http")
            if (is_pkg_installed($hostid, "apache") ||
                is_pkg_installed($hostid, "apache2"));

        # Check XFS port only if we can see that it is listening on TCP
        if (is_pkg_installed($hostid, "xfs")) {
            my $path = get_filepath_current($hostid, "/system/x11-fs-config");
            if ( -e $path ) {
                my $tcp = 1;
                open (my $fh, "<", $path) || die "unable to read from $path";
                while (<$fh>) {
                    chomp;
                    s/\#.+$//;
                    $tcp = 0 if m/^no-listen\s*=\s*tcp\s*$/;
                }
                close($fh);
                print_nagios_service_check(0, $hostname, "xfs",
                                           "check_tcp", 7100)
                    if ($tcp);
            }
        }

        print_nagios_service_check(0, $hostname, "cups queue",
                                   "check_cups_queue")
            if (is_pkg_installed($hostid, "cups") &&
                is_pkg_installed($hostid, "cups-client"));

        # The rest of the checks only work if NRPE is installed and configured
        next unless ((!$remote && $nagiosclient)
                     || ($remote && defined $nrpestatus));

        # These work without any argument passing.

        # Check for APT upgrades
        print_nagios_service_check($remote, $hostname, "apt-updates",
                                   "check_apt");

        # Check if a kernel reboot is needed
        print_nagios_service_check($remote, $hostname, "kernel status",
                                   "check_kernel_status");

        # Detect bad DNS servers
        print_nagios_service_check($remote, $hostname, "/etc/resolv.conf",
                                   "check_etc_resolv");

        # Detect hosts entries not matching DNS entries
        print_nagios_service_check($remote, $hostname, "/etc/hosts",
                                   "check_etc_hosts");

        # Detect a shutdown in progress
        print_nagios_service_check($remote, $hostname, "shutdown status",
                                   "check_shutdown");


# The check_dhcp test do not seem to work.  Check for the process existence.
#        print_nagios_service_check($remote, $hostname, "dhcp",
#                                   "check_dhcp")
#            if is_pkg_installed($hostid, "dhcp3-server");
        print_nagios_service_check($remote, $hostname, "process - dhcpd3",
                                   "check_procs_dhcpd3", "1:15!1:25")
            if (is_pkg_installed($hostid, "dhcp3-server"));
        print_nagios_service_check($remote, $hostname, "process - dhcpd",
                                   "check_procs_dhcpd", "1:15!1:25")
            if (is_pkg_installed($hostid, "isc-dhcp-server"));

        # Check DNS server
        print_nagios_service_check($remote, $hostname, "dns",
                                   "check_dns", $localhostname)
            if (is_pkg_installed($hostid, "pdns-server") ||
                is_pkg_installed($hostid, "bind9"));

        # Check FTP server
        print_nagios_service_check($remote, $hostname, "ftp",
                                   "check_ftp")
            if is_pkg_installed($hostid, "proftpd");

        # Check IMAPS server
        print_nagios_service_check($remote, $hostname, "imaps",
                                   "check_imaps")
            if is_pkg_installed($hostid, "courier-imap-ssl");

        # check software raid status if any is active
        if ( -e get_filepath_current($hostid, "/system/mdstat")) {
            my $fh;
            if (open($fh, get_filepath_current($hostid, "/system/mdstat")) &&
                grep(/^md\d+ :/, <$fh>)) {
                print_nagios_service_check($remote, $hostname, "sw-raid",
                                           "check_linux_raid");
            }
            close($fh);
        }

        # Check NFS server
        print_nagios_service_check($remote, $hostname, "nfs",
                                   "check_nfs")
            if is_pkg_installed($hostid, "nfs-kernel-server");

        print_nagios_service_check($remote, $hostname, "smtp",
                                   "check_smtp")
            if (is_pkg_installed($hostid, "exim4-daemon-heavy") ||
                is_pkg_installed($hostid, "exim4-daemon-light"));

        # These need argument passing (as in dont_blame_nrpe=1)
        next unless ((!$remote && $nagiosclient)
                     || ($remote && "args" eq $nrpestatus));

        print_nagios_service_check($remote, $hostname, "swap",
                                   "check_swap", "10%!5%");
        my $proclimit = "500!1000";
        # Raise process count limits for thin clients, as
        # lots of users can log into these machines and run their
        # desktops from there.
        if (is_pkg_installed($hostid, "ltsp-server")) {
            $proclimit = "1500!2500";
        }
        print_nagios_service_check($remote, $hostname, "processes total",
                                   "check_procs", $proclimit);
        print_nagios_service_check($remote, $hostname, "processes zombie",
                                   "check_procs_zombie", "20!100");
        # Check unix load
        print_nagios_service_check($remote, $hostname, "load as in top",
                                   "check_load", "75,75,75!90,90,90");

        # check disk free space
        my $path = get_filepath_current($hostid, "/system/procmounts");
        if ( -e $path ) {
            open (F, "<", $path) || die "unable to read from $path";
            my %checked;
            while (<F>) {
                chomp;
                my ($device, $partition, $fs, $opts) = split;
                next if (exists $checked{$device});
                # Avoid system file systems and non-local file systems.
                next if ($fs eq "devpts" ||
                         $fs eq "anon_inodefs" ||
                         $fs eq "autofs" ||
                         $fs eq "bdev" ||
                         $fs eq "binfmt_misc" ||
                         $fs eq "cgroup" ||
                         $fs eq "cifs" ||
                         $fs eq "cpuset" ||
                         $fs eq "debugfs" ||
                         $fs eq "fuse.ltspfs" ||
                         $fs eq "fusectl" ||
                         $fs eq "hugetlbfs" ||
                         $fs eq "inotifyfs" ||
                         $fs eq "iso9660" ||
                         $fs eq "mqueue" ||
                         $fs eq "nfs" ||
                         $fs eq "nfs4" ||
                         $fs eq "nfsd" ||
                         $fs eq "oprofilefs" ||
                         $fs eq "pipefs" ||
                         $fs eq "proc" ||
                         $fs eq "pstore" ||
                         $fs eq "ramfs" ||
                         $fs eq "rootfs" ||
                         $fs eq "rpc_pipefs" ||
                         $fs eq "securityfs" ||
                         $fs eq "smb" ||
                         $fs eq "sockfs" ||
                         $fs eq "sysfs" ||
                         $fs eq "tmpfs" ||
                         $fs eq "devtmpfs" ||
                         $fs eq "xenfs" ||
                         $fs eq "usbfs");

                $checked{$device} = 1;
                my $warn = 10;
                my $crit = 5;
                print_nagios_service_check($remote, $hostname,
                                           "disk $partition",
                                           "check_disk",
                                           "$warn%!$crit%!$partition");
            }
        }

        # check munin if munin-node is installed
        # check hw raid status
        # check hardware status

        # check LDAP and LDAPS using the protocol, module present in
        # nagios-plugins-basic
        print_nagios_service_check(0, $hostname, "ldap root DSE",
                                   "check_ldap_root")
            if is_pkg_installed($hostid, "slapd");

        # Check Squid web proxy
        print_nagios_service_check($remote, $hostname, "squid",
                                   "check_squid", "3128!http://www")
            if is_pkg_installed($hostid, "squid");

        print_nagios_service_check($remote, $hostname, "ntp time server",
                                   "check_ntp", "-H!localhost")
            if (is_pkg_installed($hostid, "ntp") ||
                is_pkg_installed($hostid, "ntp-server"));

        # Detect if cron no longer is running
        print_nagios_service_check($remote, $hostname, "process - cron",
                                   "check_procs_cron", "1:15!1:25")
            if (is_pkg_installed($hostid, "cron"));
    }

    if (%hostgroup) {
        print <<EOF;
##################### host groups #######################
EOF
        for my $name (sort keys %hostgroup) {
            print_nagios_hostgroup($name);
        }
    }
}