1: #!/usr/bin/perl
2:
3: # Housekeeping program, started by cron, loncontrol and loncron.pl
4: #
5: # $Id: loncron,v 1.103.2.2 2019/02/10 03:02:10 raeburn Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29:
30: $|=1;
31: use strict;
32:
33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35: use LONCAPA::Checksumming;
36: use LONCAPA;
37: use Apache::lonnet;
38: use Apache::loncommon;
39:
40: use IO::File;
41: use IO::Socket;
42: use HTML::Entities;
43: use Getopt::Long;
44: #globals
45: use vars qw (%perlvar %simplestatus $errors $warnings $notices $totalcount);
46:
47: my $statusdir="/home/httpd/html/lon-status";
48:
49:
50: # --------------------------------------------------------- Output error status
51:
52: sub log {
53: my $fh=shift;
54: if ($fh) { print $fh @_ }
55: }
56:
57: sub errout {
58: my $fh=shift;
59: &log($fh,(<<ENDERROUT));
60: <table border="2" bgcolor="#CCCCCC">
61: <tr><td>Notices</td><td>$notices</td></tr>
62: <tr><td>Warnings</td><td>$warnings</td></tr>
63: <tr><td>Errors</td><td>$errors</td></tr>
64: </table><p><a href="#top">Top</a></p>
65: ENDERROUT
66: }
67:
68: sub rotate_logfile {
69: my ($file,$fh,$description) = @_;
70: my $size=(stat($file))[7];
71: if ($size>40000) {
72: &log($fh,"<p>Rotating $description ...</p>");
73: rename("$file.2","$file.3");
74: rename("$file.1","$file.2");
75: rename("$file","$file.1");
76: }
77: }
78:
79: sub start_daemon {
80: my ($fh,$daemon,$pidfile,$args) = @_;
81: my $progname=$daemon;
82: if ($daemon eq 'lonc') {
83: $progname='loncnew';
84: }
85: my $error_fname="$perlvar{'lonDaemons'}/logs/${daemon}_errors";
86: &rotate_logfile($error_fname,$fh,'error logs');
87: if ($daemon eq 'lonc') {
88: &clean_sockets($fh);
89: }
90: system("$perlvar{'lonDaemons'}/$progname 2>$perlvar{'lonDaemons'}/logs/${daemon}_errors");
91: sleep 1;
92: if (-e $pidfile) {
93: &log($fh,"<p>Seems like it started ...</p>");
94: my $lfh=IO::File->new("$pidfile");
95: my $daemonpid=<$lfh>;
96: chomp($daemonpid);
97: if ($daemonpid =~ /^\d+$/ && kill 0 => $daemonpid) {
98: return 1;
99: } else {
100: return 0;
101: }
102: }
103: &log($fh,"<p>Seems like that did not work!</p>");
104: $errors++;
105: return 0;
106: }
107:
108: sub checkon_daemon {
109: my ($fh,$daemon,$maxsize,$send,$args)=@_;
110:
111: my $result;
112: &log($fh,'<hr /><a name="'.$daemon.'" /><h2>'.$daemon.'</h2><h3>Log</h3><p style="white-space: pre;"><tt>');
113: printf("%-15s ",$daemon);
114: if ($fh) {
115: if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){
116: if (open(DFH,"tail -n25 $perlvar{'lonDaemons'}/logs/$daemon.log|")) {
117: while (my $line=<DFH>) {
118: &log($fh,"$line");
119: if ($line=~/INFO/) { $notices++; }
120: if ($line=~/WARNING/) { $notices++; }
121: if ($line=~/CRITICAL/) { $warnings++; }
122: }
123: close (DFH);
124: }
125: }
126: &log($fh,"</tt></p>");
127: }
128:
129: my $pidfile="$perlvar{'lonDaemons'}/logs/$daemon.pid";
130:
131: my $restartflag=1;
132: my $daemonpid;
133: if (-e $pidfile) {
134: my $lfh=IO::File->new("$pidfile");
135: $daemonpid=<$lfh>;
136: chomp($daemonpid);
137: if ($daemonpid =~ /^\d+$/ && kill 0 => $daemonpid) {
138: &log($fh,"<h3>$daemon at pid $daemonpid responding");
139: if ($send) { &log($fh,", sending $send"); }
140: &log($fh,"</h3>");
141: if ($send eq 'USR1') { kill USR1 => $daemonpid; }
142: if ($send eq 'USR2') { kill USR2 => $daemonpid; }
143: $restartflag=0;
144: if ($send eq 'USR2') {
145: $result = 'reloaded';
146: print "reloaded\n";
147: } else {
148: $result = 'running';
149: print "running\n";
150: }
151: } else {
152: $errors++;
153: &log($fh,"<h3>$daemon at pid $daemonpid not responding</h3>");
154: $restartflag=1;
155: &log($fh,"<h3>Decided to clean up stale .pid file and restart $daemon</h3>");
156: }
157: }
158: if ($restartflag==1) {
159: $simplestatus{$daemon}='off';
160: $errors++;
161: my $kadaemon=$daemon;
162: if ($kadaemon eq 'lonmemcached') { $kadaemon='memcached'; }
163: &log($fh,'<br /><font color="red">Killall '.$daemon.': '.
164: `killall $kadaemon 2>&1`.' - ');
165: sleep 1;
166: &log($fh,unlink($pidfile).' - '.
167: `killall -9 $kadaemon 2>&1`.
168: '</font><br />');
169: &log($fh,"<h3>$daemon not running, trying to start</h3>");
170:
171: if (&start_daemon($fh,$daemon,$pidfile,$args)) {
172: &log($fh,"<h3>$daemon at pid $daemonpid responding</h3>");
173: $simplestatus{$daemon}='restarted';
174: $result = 'started';
175: print "started\n";
176: } else {
177: $errors++;
178: &log($fh,"<h3>$daemon at pid $daemonpid not responding</h3>");
179: &log($fh,"<p>Give it one more try ...</p>");
180: print " ";
181: if (&start_daemon($fh,$daemon,$pidfile,$args)) {
182: &log($fh,"<h3>$daemon at pid $daemonpid responding</h3>");
183: $simplestatus{$daemon}='restarted';
184: $result = 'started';
185: print "started\n";
186: } else {
187: $result = 'failed';
188: print " failed\n";
189: $simplestatus{$daemon}='failed';
190: $errors++; $errors++;
191: &log($fh,"<h3>$daemon at pid $daemonpid not responding</h3>");
192: &log($fh,"<p>Unable to start $daemon</p>");
193: }
194: }
195: if ($fh) {
196: if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){
197: &log($fh,"<p><pre>");
198: if (open(DFH,"tail -n100 $perlvar{'lonDaemons'}/logs/$daemon.log|")) {
199: while (my $line=<DFH>) {
200: &log($fh,"$line");
201: if ($line=~/WARNING/) { $notices++; }
202: if ($line=~/CRITICAL/) { $notices++; }
203: }
204: close (DFH);
205: }
206: &log($fh,"</pre></p>");
207: }
208: }
209: }
210:
211: my $fname="$perlvar{'lonDaemons'}/logs/$daemon.log";
212: &rotate_logfile($fname,$fh,'logs');
213:
214: &errout($fh);
215: return $result;
216: }
217:
218: # --------------------------------------------------------------------- Machine
219: sub log_machine_info {
220: my ($fh)=@_;
221: &log($fh,'<hr /><a name="machine" /><h2>Machine Information</h2>');
222: &log($fh,"<h3>loadavg</h3>");
223:
224: open (LOADAVGH,"/proc/loadavg");
225: my $loadavg=<LOADAVGH>;
226: close (LOADAVGH);
227:
228: &log($fh,"<tt>$loadavg</tt>");
229:
230: my @parts=split(/\s+/,$loadavg);
231: if ($parts[1]>4.0) {
232: $errors++;
233: } elsif ($parts[1]>2.0) {
234: $warnings++;
235: } elsif ($parts[1]>1.0) {
236: $notices++;
237: }
238:
239: &log($fh,"<h3>df</h3>");
240: &log($fh,"<pre>");
241:
242: open (DFH,"df|");
243: while (my $line=<DFH>) {
244: &log($fh,&encode_entities($line,'<>&"'));
245: @parts=split(/\s+/,$line);
246: my $usage=$parts[4];
247: $usage=~s/\W//g;
248: if ($usage>90) {
249: $warnings++;
250: $notices++;
251: } elsif ($usage>80) {
252: $warnings++;
253: } elsif ($usage>60) {
254: $notices++;
255: }
256: if ($usage>95) { $warnings++; $warnings++; $simplestatus{'diskfull'}++; }
257: }
258: close (DFH);
259: &log($fh,"</pre>");
260:
261:
262: &log($fh,"<h3>ps</h3>");
263: &log($fh,"<pre>");
264: my $psproc=0;
265:
266: open (PSH,"ps aux --cols 140 |");
267: while (my $line=<PSH>) {
268: &log($fh,&encode_entities($line,'<>&"'));
269: $psproc++;
270: }
271: close (PSH);
272: &log($fh,"</pre>");
273:
274: if ($psproc>200) { $notices++; }
275: if ($psproc>250) { $notices++; }
276:
277: &log($fh,"<h3>distprobe</h3>");
278: &log($fh,"<pre>");
279: &log($fh,&encode_entities(&LONCAPA::distro(),'<>&"'));
280: &log($fh,"</pre>");
281:
282: &errout($fh);
283: }
284:
285: sub start_logging {
286: my $fh=IO::File->new(">$statusdir/newstatus.html");
287: my %simplestatus=();
288: my $now=time;
289: my $date=localtime($now);
290:
291:
292: &log($fh,(<<ENDHEADERS));
293: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
294: <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
295: <head>
296: <title>LON Status Report $perlvar{'lonHostID'}</title>
297: <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
298: </head>
299: <body bgcolor="#AAAAAA">
300: <a name="top" />
301: <h1>LON Status Report $perlvar{'lonHostID'}</h1>
302: <h2>$date ($now)</h2>
303: <ol>
304: <li><a href="#configuration">Configuration</a></li>
305: <li><a href="#machine">Machine Information</a></li>
306: <li><a href="#tmp">Temporary Files</a></li>
307: <li><a href="#tokens">Session Tokens</a></li>
308: <li><a href="#webdav">WebDAV Session Tokens</a></li>
309: <li><a href="#httpd">httpd</a></li>
310: <li><a href="#lonsql">lonsql</a></li>
311: <li><a href="#lond">lond</a></li>
312: <li><a href="#lonc">lonc</a></li>
313: <li><a href="#lonnet">lonnet</a></li>
314: <li><a href="#connections">Connections</a></li>
315: <li><a href="#delayed">Delayed Messages</a></li>
316: <li><a href="#errcount">Error Count</a></li>
317: </ol>
318: <hr />
319: <a name="configuration" />
320: <h2>Configuration</h2>
321: <h3>PerlVars</h3>
322: <table border="2">
323: ENDHEADERS
324:
325: foreach my $varname (sort(keys(%perlvar))) {
326: &log($fh,"<tr><td>$varname</td><td>".
327: &encode_entities($perlvar{$varname},'<>&"')."</td></tr>\n");
328: }
329: &log($fh,"</table><h3>Hosts</h3><table border='2'>");
330: my %hostname = &Apache::lonnet::all_hostnames();
331: foreach my $id (sort(keys(%hostname))) {
332: my $role = (&Apache::lonnet::is_library($id) ? 'library'
333: : 'access');
334: &log($fh,
335: "<tr><td>$id</td><td>".&Apache::lonnet::host_domain($id).
336: "</td><td>".$role.
337: "</td><td>".&Apache::lonnet::hostname($id)."</td></tr>\n");
338: }
339: &log($fh,"</table><h3>Spare Hosts</h3>");
340: if (keys(%Apache::lonnet::spareid) > 0) {
341: &log($fh,"<ul>");
342: foreach my $type (sort(keys(%Apache::lonnet::spareid))) {
343: &log($fh,"<li>$type\n<ol>");
344: foreach my $id (@{ $Apache::lonnet::spareid{$type} }) {
345: &log($fh,"<li>$id</li>\n");
346: }
347: &log($fh,"</ol>\n</li>\n");
348: }
349: &log($fh,"</ul>\n");
350: } else {
351: &log($fh,"No spare hosts specified<br />\n");
352: }
353: return $fh;
354: }
355:
356: # --------------------------------------------------------------- clean out tmp
357: sub clean_tmp {
358: my ($fh)=@_;
359: &log($fh,'<hr /><a name="tmp" /><h2>Temporary Files</h2>');
360: my ($cleaned,$old,$removed) = (0,0,0);
361: my %errors = (
362: dir => [],
363: file => [],
364: failopen => [],
365: );
366: my %error_titles = (
367: dir => 'failed to remove empty directory:',
368: file => 'failed to unlike stale file',
369: failopen => 'failed to open file or directory'
370: );
371: ($cleaned,$old,$removed) = &recursive_clean_tmp('',$cleaned,$old,$removed,\%errors);
372: &log($fh,"Cleaned up: ".$cleaned." files; removed: $removed empty directories; (found: $old old checkout tokens)");
373: foreach my $key (sort(keys(%errors))) {
374: if (ref($errors{$key}) eq 'ARRAY') {
375: if (@{$errors{$key}} > 0) {
376: &log($fh,"Error during cleanup ($error_titles{$key}):<ul><li>".
377: join('</li><li><tt>',@{$errors{$key}}).'</tt></li></ul><br />');
378: }
379: }
380: }
381: }
382:
383: sub recursive_clean_tmp {
384: my ($subdir,$cleaned,$old,$removed,$errors) = @_;
385: my $base = "$perlvar{'lonDaemons'}/tmp";
386: my $path = $base;
387: next if ($subdir =~ m{\.\./});
388: next unless (ref($errors) eq 'HASH');
389: unless ($subdir eq '') {
390: $path .= '/'.$subdir;
391: }
392: if (opendir(my $dh,"$path")) {
393: while (my $file = readdir($dh)) {
394: next if ($file =~ /^\.\.?$/);
395: my $fname = "$path/$file";
396: if (-d $fname) {
397: my $innerdir;
398: if ($subdir eq '') {
399: $innerdir = $file;
400: } else {
401: $innerdir = $subdir.'/'.$file;
402: }
403: ($cleaned,$old,$removed) =
404: &recursive_clean_tmp($innerdir,$cleaned,$old,$removed,$errors);
405: my @doms = &Apache::lonnet::current_machine_domains();
406:
407: if (open(my $dirhandle,$fname)) {
408: unless (($innerdir eq 'helprequests') ||
409: (($innerdir =~ /^addcourse/) && ($innerdir !~ m{/\d+$}))) {
410: my @contents = grep {!/^\.\.?$/} readdir($dirhandle);
411: join('&&',@contents)."\n";
412: if (scalar(grep {!/^\.\.?$/} readdir($dirhandle)) == 0) {
413: closedir($dirhandle);
414: if ($fname =~ m{^\Q$perlvar{'lonDaemons'}\E/tmp/}) {
415: if (rmdir($fname)) {
416: $removed ++;
417: } elsif (ref($errors->{dir}) eq 'ARRAY') {
418: push(@{$errors->{dir}},$fname);
419: }
420: }
421: }
422: } else {
423: closedir($dirhandle);
424: }
425: }
426: } else {
427: my ($dev,$ino,$mode,$nlink,
428: $uid,$gid,$rdev,$size,
429: $atime,$mtime,$ctime,
430: $blksize,$blocks)=stat($fname);
431: my $now=time;
432: my $since=$now-$mtime;
433: if ($since>$perlvar{'lonExpire'}) {
434: if ($subdir eq '') {
435: my $line='';
436: if ($fname =~ /\.db$/) {
437: if (unlink($fname)) {
438: $cleaned++;
439: } elsif (ref($errors->{file}) eq 'ARRAY') {
440: push(@{$errors->{file}},$fname);
441: }
442: } elsif (open(PROBE,$fname)) {
443: my $line='';
444: $line=<PROBE>;
445: close(PROBE);
446: if ($line=~/^CHECKOUTTOKEN\&/) {
447: if ($since>365*$perlvar{'lonExpire'}) {
448: if (unlink($fname)) {
449: $cleaned++;
450: } elsif (ref($errors->{file}) eq 'ARRAY') {
451: push(@{$errors->{file}},$fname);
452: }
453: } else {
454: $old++;
455: }
456: } else {
457: if (unlink($fname)) {
458: $cleaned++;
459: } elsif (ref($errors->{file}) eq 'ARRAY') {
460: push(@{$errors->{file}},$fname);
461: }
462: }
463: } elsif (ref($errors->{failopen}) eq 'ARRAY') {
464: push(@{$errors->{failopen}},$fname);
465: }
466: } else {
467: if (unlink($fname)) {
468: $cleaned++;
469: } elsif (ref($errors->{file}) eq 'ARRAY') {
470: push(@{$errors->{file}},$fname);
471: }
472: }
473: }
474: }
475: }
476: closedir($dh);
477: } elsif (ref($errors->{failopen}) eq 'ARRAY') {
478: push(@{$errors->{failopen}},$path);
479: }
480: return ($cleaned,$old,$removed);
481: }
482:
483: # ------------------------------------------------------------ clean out lonIDs
484: sub clean_lonIDs {
485: my ($fh)=@_;
486: &log($fh,'<hr /><a name="tokens" /><h2>Session Tokens</h2>');
487: my $cleaned=0;
488: my $active=0;
489: while (my $fname=<$perlvar{'lonIDsDir'}/*>) {
490: my ($dev,$ino,$mode,$nlink,
491: $uid,$gid,$rdev,$size,
492: $atime,$mtime,$ctime,
493: $blksize,$blocks)=stat($fname);
494: my $now=time;
495: my $since=$now-$mtime;
496: if ($since>$perlvar{'lonExpire'}) {
497: $cleaned++;
498: &log($fh,"Unlinking $fname<br />");
499: unlink("$fname");
500: } else {
501: $active++;
502: }
503: }
504: &log($fh,"<p>Cleaned up ".$cleaned." stale session token(s).</p>");
505: &log($fh,"<h3>$active open session(s)</h3>");
506: }
507:
508: # ------------------------------------------------ clean out webDAV Session IDs
509: sub clean_webDAV_sessionIDs {
510: my ($fh)=@_;
511: if ($perlvar{'lonRole'} eq 'library') {
512: &log($fh,'<hr /><a name="webdav" /><h2>WebDAV Session Tokens</h2>');
513: my $cleaned=0;
514: my $active=0;
515: my $now = time;
516: if (-d $perlvar{'lonDAVsessDir'}) {
517: while (my $fname=<$perlvar{'lonDAVsessDir'}/*>) {
518: my @stats = stat($fname);
519: my $since=$now-$stats[9];
520: if ($since>$perlvar{'lonExpire'}) {
521: $cleaned++;
522: &log($fh,"Unlinking $fname<br />");
523: unlink("$fname");
524: } else {
525: $active++;
526: }
527: }
528: &log($fh,"<p>Cleaned up ".$cleaned." stale webDAV session token(s).</p>");
529: &log($fh,"<h3>$active open webDAV session(s)</h3>");
530: }
531: }
532: }
533:
534: # ----------------------------------------------------------- clean out sockets
535: sub clean_sockets {
536: my ($fh)=@_;
537: my $cleaned=0;
538: opendir(SOCKETS,$perlvar{'lonSockDir'});
539: while (my $fname=readdir(SOCKETS)) {
540: next if (-d $fname
541: || $fname=~/(mysqlsock|maximasock|rsock|\Q$perlvar{'lonSockDir'}\E)/);
542: $cleaned++;
543: &log($fh,"Unlinking $fname<br />");
544: unlink("/home/httpd/sockets/$fname");
545: }
546: &log($fh,"<p>Cleaned up ".$cleaned." stale sockets.</p>");
547: }
548:
549:
550: # ----------------------------------------------------------------------- httpd
551: sub check_httpd_logs {
552: my ($fh)=@_;
553: if (open(PIPE,"./lchttpdlogs|")) {
554: while (my $line=<PIPE>) {
555: &log($fh,$line);
556: if ($line=~/\[error\]/) { $notices++; }
557: }
558: close(PIPE);
559: }
560: &errout($fh);
561: }
562:
563: # ---------------------------------------------------------------------- lonnet
564:
565: sub rotate_lonnet_logs {
566: my ($fh)=@_;
567: &log($fh,'<hr /><a name="lonnet" /><h2>lonnet</h2><h3>Temp Log</h3><pre>');
568: print "Checking logs.\n";
569: if (-e "$perlvar{'lonDaemons'}/logs/lonnet.log"){
570: open (DFH,"tail -n50 $perlvar{'lonDaemons'}/logs/lonnet.log|");
571: while (my $line=<DFH>) {
572: &log($fh,&encode_entities($line,'<>&"'));
573: }
574: close (DFH);
575: }
576: &log($fh,"</pre><h3>Perm Log</h3><pre>");
577:
578: if (-e "$perlvar{'lonDaemons'}/logs/lonnet.perm.log") {
579: open(DFH,"tail -n10 $perlvar{'lonDaemons'}/logs/lonnet.perm.log|");
580: while (my $line=<DFH>) {
581: &log($fh,&encode_entities($line,'<>&"'));
582: }
583: close (DFH);
584: } else { &log($fh,"No perm log\n") }
585:
586: my $fname="$perlvar{'lonDaemons'}/logs/lonnet.log";
587: &rotate_logfile($fname,$fh,'lonnet log');
588:
589: &log($fh,"</pre>");
590: &errout($fh);
591: }
592:
593: sub rotate_other_logs {
594: my ($fh) = @_;
595: my %logs = (
596: autoenroll => 'Auto Enroll log',
597: autocreate => 'Create Course log',
598: searchcat => 'Search Cataloguing log',
599: autoupdate => 'Auto Update log',
600: refreshcourseids_db => 'Refresh CourseIDs db log',
601: );
602: foreach my $item (keys(%logs)) {
603: my $fname=$perlvar{'lonDaemons'}.'/logs/'.$item.'.log';
604: &rotate_logfile($fname,$fh,$logs{$item});
605: }
606: }
607:
608: # ----------------------------------------------------------------- Connections
609: sub test_connections {
610: my ($fh)=@_;
611: &log($fh,'<hr /><a name="connections" /><h2>Connections</h2>');
612: print "Testing connections.\n";
613: &log($fh,"<table border='2'>");
614: my ($good,$bad)=(0,0);
615: my %hostname = &Apache::lonnet::all_hostnames();
616: foreach my $tryserver (sort(keys(%hostname))) {
617: print(".");
618: my $result;
619: my $answer=&Apache::lonnet::reply("ping",$tryserver);
620: if ($answer eq "$tryserver:$perlvar{'lonHostID'}") {
621: $result="<b>ok</b>";
622: $good++;
623: } else {
624: $result=$answer;
625: $warnings++;
626: if ($answer eq 'con_lost') {
627: $bad++;
628: $warnings++;
629: } else {
630: $good++; #self connection
631: }
632: }
633: if ($answer =~ /con_lost/) { print(" $tryserver down\n"); }
634: &log($fh,"<tr><td>$tryserver</td><td>$result</td></tr>\n");
635: }
636: &log($fh,"</table>");
637: print "\n$good good, $bad bad connections\n";
638: &errout($fh);
639: }
640:
641:
642: # ------------------------------------------------------------ Delayed messages
643: sub check_delayed_msg {
644: my ($fh)=@_;
645: &log($fh,'<hr /><a name="delayed" /><h2>Delayed Messages</h2>');
646: print "Checking buffers.\n";
647:
648: &log($fh,'<h3>Scanning Permanent Log</h3>');
649:
650: my $unsend=0;
651:
652: my %hostname = &Apache::lonnet::all_hostnames();
653: my $numhosts = scalar(keys(%hostname));
654:
655: my $dfh=IO::File->new("$perlvar{'lonDaemons'}/logs/lonnet.perm.log");
656: while (my $line=<$dfh>) {
657: my ($time,$sdf,$dserv,$dcmd)=split(/:/,$line);
658: if ($numhosts) {
659: next unless ($hostname{$dserv});
660: }
661: if ($sdf eq 'F') {
662: my $local=localtime($time);
663: &log($fh,"<b>Failed: $time, $dserv, $dcmd</b><br />");
664: $warnings++;
665: }
666: if ($sdf eq 'S') { $unsend--; }
667: if ($sdf eq 'D') { $unsend++; }
668: }
669:
670: &log($fh,"<p>Total unsend messages: <b>$unsend</b></p>\n");
671: if ($unsend > 0) {
672: $warnings=$warnings+5*$unsend;
673: }
674:
675: if ($unsend) { $simplestatus{'unsend'}=$unsend; }
676: &log($fh,"<h3>Outgoing Buffer</h3>\n<pre>");
677: # list directory with delayed messages and remember offline servers
678: my %servers=();
679: open (DFH,"ls -lF $perlvar{'lonSockDir'}/delayed|");
680: while (my $line=<DFH>) {
681: my ($server)=($line=~/\.(\w+)$/);
682: if ($server) { $servers{$server}=1; }
683: &log($fh,&encode_entities($line,'<>&"'));
684: }
685: &log($fh,"</pre>\n");
686: close (DFH);
687: # pong to all servers that have delayed messages
688: # this will trigger a reverse connection, which should flush the buffers
689: foreach my $tryserver (sort(keys(%servers))) {
690: if ($hostname{$tryserver} || !$numhosts) {
691: my $answer;
692: eval {
693: local $SIG{ ALRM } = sub { die "TIMEOUT" };
694: alarm(20);
695: $answer = &Apache::lonnet::reply("pong",$tryserver);
696: alarm(0);
697: };
698: if ($@ && $@ =~ m/TIMEOUT/) {
699: &log($fh,"Attempted pong to $tryserver timed out<br />");
700: print "Time out while contacting: $tryserver for pong.\n";
701: } else {
702: &log($fh,"Pong to $tryserver: $answer<br />");
703: }
704: } else {
705: &log($fh,"$tryserver has delayed messages, but is not part of the cluster -- skipping 'Pong'.<br />");
706: }
707: }
708: }
709:
710: sub finish_logging {
711: my ($fh)=@_;
712: &log($fh,"<a name='errcount' />\n");
713: $totalcount=$notices+4*$warnings+100*$errors;
714: &errout($fh);
715: &log($fh,"<h1>Total Error Count: $totalcount</h1>");
716: my $now=time;
717: my $date=localtime($now);
718: &log($fh,"<hr />$date ($now)</body></html>\n");
719: print "lon-status webpage updated.\n";
720: $fh->close();
721:
722: if ($errors) { $simplestatus{'errors'}=$errors; }
723: if ($warnings) { $simplestatus{'warnings'}=$warnings; }
724: if ($notices) { $simplestatus{'notices'}=$notices; }
725: $simplestatus{'time'}=time;
726: }
727:
728: sub log_simplestatus {
729: rename("$statusdir/newstatus.html","$statusdir/index.html");
730:
731: my $sfh=IO::File->new(">$statusdir/loncron_simple.txt");
732: foreach (keys %simplestatus) {
733: print $sfh $_.'='.$simplestatus{$_}.'&';
734: }
735: print $sfh "\n";
736: $sfh->close();
737: }
738:
739: sub write_loncaparevs {
740: print "Retrieving LON-CAPA version information.\n";
741: my %hostname = &Apache::lonnet::all_hostnames();
742: my $output;
743: foreach my $id (sort(keys(%hostname))) {
744: if ($id ne '') {
745: my $loncaparev;
746: eval {
747: local $SIG{ ALRM } = sub { die "TIMEOUT" };
748: alarm(10);
749: $loncaparev =
750: &Apache::lonnet::get_server_loncaparev('',$id,1,'loncron');
751: alarm(0);
752: };
753: if ($@ && $@ =~ m/TIMEOUT/) {
754: print "Time out while contacting lonHost: $id for version.\n";
755: }
756: if ($loncaparev =~ /^[\w.\-]+$/) {
757: $output .= $id.':'.$loncaparev."\n";
758: }
759: }
760: }
761: if ($output) {
762: if (open(my $fh,">$perlvar{'lonTabDir'}/loncaparevs.tab")) {
763: print $fh $output;
764: close($fh);
765: &Apache::lonnet::load_loncaparevs();
766: }
767: }
768: return;
769: }
770:
771: sub write_serverhomeIDs {
772: print "Retrieving LON-CAPA lonHostID information.\n";
773: my %name_to_host = &Apache::lonnet::all_names();
774: my $output;
775: foreach my $name (sort(keys(%name_to_host))) {
776: if ($name ne '') {
777: if (ref($name_to_host{$name}) eq 'ARRAY') {
778: my $serverhomeID;
779: eval {
780: local $SIG{ ALRM } = sub { die "TIMEOUT" };
781: alarm(10);
782: $serverhomeID =
783: &Apache::lonnet::get_server_homeID($name,1,'loncron');
784: alarm(0);
785: };
786: if ($@ && $@ =~ m/TIMEOUT/) {
787: print "Time out while contacting server: $name\n";
788: }
789: if ($serverhomeID ne '') {
790: $output .= $name.':'.$serverhomeID."\n";
791: } else {
792: $output .= $name.':'.$name_to_host{$name}->[0]."\n";
793: }
794: }
795: }
796: }
797: if ($output) {
798: if (open(my $fh,">$perlvar{'lonTabDir'}/serverhomeIDs.tab")) {
799: print $fh $output;
800: close($fh);
801: &Apache::lonnet::load_serverhomeIDs();
802: }
803: }
804: return;
805: }
806:
807: sub write_checksums {
808: my $distro = &LONCAPA::distro();
809: if ($distro) {
810: print "Retrieving file version and checksumming.\n";
811: my $numchksums = 0;
812: my ($chksumsref,$versionsref) =
813: &LONCAPA::Checksumming::get_checksums($distro,$perlvar{'lonDaemons'},
814: $perlvar{'lonLib'},
815: $perlvar{'lonIncludes'},
816: $perlvar{'lonTabDir'});
817: if (ref($chksumsref) eq 'HASH') {
818: $numchksums = scalar(keys(%{$chksumsref}));
819: }
820: print "File version retrieved and checksumming completed for $numchksums files.\n";
821: } else {
822: print "File version retrieval and checksumming skipped - could not determine Linux distro.\n";
823: }
824: return;
825: }
826:
827: sub send_mail {
828: my $defdom = $perlvar{'lonDefDomain'};
829: my $origmail = $perlvar{'lonAdmEMail'};
830: my $emailto = &Apache::loncommon::build_recipient_list(undef,
831: 'lonstatusmail',$defdom,$origmail);
832: if ($totalcount>2500) {
833: $emailto.=",$perlvar{'lonSysEMail'}";
834: }
835: my $from;
836: my $hostname=`/bin/hostname`;
837: chop($hostname);
838: $hostname=~s/[^\w\.]//g;
839: if ($hostname) {
840: $from = 'www@'.$hostname;
841: }
842: my $subj="LON: $perlvar{'lonHostID'} E:$errors W:$warnings N:$notices";
843: my $loncronmail = "To: $emailto\n".
844: "From: $from\n".
845: "Subject: ".$subj."\n".
846: "Content-type: text/html\; charset=UTF-8\n".
847: "MIME-Version: 1.0\n\n";
848: if (open(my $fh,"<$statusdir/index.html")) {
849: while (<$fh>) {
850: $loncronmail .= $_;
851: }
852: close($fh);
853: } else {
854: $loncronmail .= "Failed to read from http://$hostname/lon-status/index.html\n";
855: }
856: $loncronmail .= "\n\n";
857: if (open(my $mailh, "|/usr/lib/sendmail -oi -t -odb")) {
858: print $mailh $loncronmail;
859: close($mailh);
860: print "Sending mail.\n";
861: } else {
862: print "Sending mail failed.\n";
863: }
864: }
865:
866: sub usage {
867: print(<<USAGE);
868: loncron - housekeeping program that checks up on various parts of LON-CAPA
869:
870: Options:
871: --help Display
872: --noemail Do not send the status email
873: --justcheckconnections Only check the current status of the lonc/d
874: connections, do not send emails do not
875: check if the daemons are running, do not
876: generate lon-status
877: --justcheckdaemons Only check that all of the Lon-CAPA daemons are
878: running, do not send emails do not
879: check the lonc/d connections, do not
880: generate lon-status
881: --justreload Only tell the daemons to reload the config files,
882: do not send emails do not
883: check if the daemons are running, do not
884: generate lon-status
885:
886: USAGE
887: }
888:
889: # ================================================================ Main Program
890: sub main () {
891: my ($help,$justcheckdaemons,$noemail,$justcheckconnections,
892: $justreload);
893: &GetOptions("help" => \$help,
894: "justcheckdaemons" => \$justcheckdaemons,
895: "noemail" => \$noemail,
896: "justcheckconnections" => \$justcheckconnections,
897: "justreload" => \$justreload
898: );
899: if ($help) { &usage(); return; }
900: # --------------------------------- Read loncapa_apache.conf and loncapa.conf
901: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
902: %perlvar=%{$perlvarref};
903: undef $perlvarref;
904: delete $perlvar{'lonReceipt'}; # remove since sensitive and not needed
905: delete $perlvar{'lonSqlAccess'}; # remove since sensitive and not needed
906: chdir($perlvar{'lonDaemons'});
907: # --------------------------------------- Make sure that LON-CAPA is configured
908: # I only test for one thing here (lonHostID). This is just a safeguard.
909: if ('{[[[[lonHostID]]]]}' eq $perlvar{'lonHostID'}) {
910: print("Unconfigured machine.\n");
911: my $emailto=$perlvar{'lonSysEMail'};
912: my $hostname=`/bin/hostname`;
913: chop $hostname;
914: $hostname=~s/[^\w\.]//g; # make sure is safe to pass through shell
915: my $subj="LON: Unconfigured machine $hostname";
916: system("echo 'Unconfigured machine $hostname.' |".
917: " mail -s '$subj' $emailto > /dev/null");
918: exit 1;
919: }
920:
921: # ----------------------------- Make sure this process is running from user=www
922: my $wwwid=getpwnam('www');
923: if ($wwwid!=$<) {
924: print("User ID mismatch. This program must be run as user 'www'.\n");
925: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
926: my $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
927: system("echo 'User ID mismatch. loncron must be run as user www.' |".
928: " mail -s '$subj' $emailto > /dev/null");
929: exit 1;
930: }
931:
932: # -------------------------------------------- Force reload of host information
933: my $nomemcache;
934: if ($justcheckdaemons) {
935: $nomemcache=1;
936: my $memcachepidfile="$perlvar{'lonDaemons'}/logs/memcached.pid";
937: my $memcachepid;
938: if (-e $memcachepidfile) {
939: my $memfh=IO::File->new($memcachepidfile);
940: $memcachepid=<$memfh>;
941: chomp($memcachepid);
942: if ($memcachepid =~ /^\d+$/ && kill 0 => $memcachepid) {
943: undef($nomemcache);
944: }
945: }
946: }
947: &Apache::lonnet::load_hosts_tab(1,$nomemcache);
948: &Apache::lonnet::load_domain_tab(1,$nomemcache);
949: &Apache::lonnet::get_iphost(1,$nomemcache);
950:
951: # ----------------------------------------- Force firewall update for lond port
952:
953: if ((!$justcheckdaemons) && (!$justreload)) {
954: my $now = time;
955: my $tmpfile = $perlvar{'lonDaemons'}.'/tmp/lciptables_iphost_'.
956: $now.$$.int(rand(10000));
957: if (open(my $fh,">$tmpfile")) {
958: my %iphosts = &Apache::lonnet::get_iphost();
959: foreach my $key (keys(%iphosts)) {
960: print $fh "$key\n";
961: }
962: close($fh);
963: if (&LONCAPA::try_to_lock('/tmp/lock_lciptables')) {
964: my $execpath = $perlvar{'lonDaemons'}.'/lciptables';
965: system("$execpath $tmpfile");
966: unlink('/tmp/lock_lciptables'); # Remove the lock file.
967: }
968: unlink($tmpfile);
969: }
970: }
971:
972: # ---------------------------------------------------------------- Start report
973:
974: $errors=0;
975: $warnings=0;
976: $notices=0;
977:
978:
979: my $fh;
980: if (!$justcheckdaemons && !$justcheckconnections && !$justreload) {
981: $fh=&start_logging();
982:
983: &log_machine_info($fh);
984: &clean_tmp($fh);
985: &clean_lonIDs($fh);
986: &clean_webDAV_sessionIDs($fh);
987: &check_httpd_logs($fh);
988: &rotate_lonnet_logs($fh);
989: &rotate_other_logs($fh);
990: }
991: if (!$justcheckconnections && !$justreload) {
992: &checkon_daemon($fh,'lonmemcached',40000);
993: &checkon_daemon($fh,'lonsql',200000);
994: if ( &checkon_daemon($fh,'lond',40000,'USR1') eq 'running') {
995: &checkon_daemon($fh,'lond',40000,'USR2');
996: }
997: &checkon_daemon($fh,'lonc',40000,'USR1');
998: &checkon_daemon($fh,'lonmaxima',40000);
999: &checkon_daemon($fh,'lonr',40000);
1000: }
1001: if ($justreload) {
1002: &checkon_daemon($fh,'lond',40000,'USR2');
1003: &checkon_daemon($fh,'lonc',40000,'USR2');
1004: }
1005: if ($justcheckconnections) {
1006: &test_connections($fh);
1007: }
1008: if (!$justcheckdaemons && !$justcheckconnections && !$justreload) {
1009: &check_delayed_msg($fh);
1010: &finish_logging($fh);
1011: &log_simplestatus();
1012: &write_loncaparevs();
1013: &write_serverhomeIDs();
1014: &write_checksums();
1015: if ($totalcount>200 && !$noemail) { &send_mail(); }
1016: }
1017: }
1018:
1019: &main();
1020: 1;
1021:
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