File:  [LON-CAPA] / loncom / cgi / clusterstatus.pl
Revision 1.17: download - view: text, annotated - select for diffs
Tue Aug 5 18:47:21 2003 UTC (20 years, 9 months ago) by www
Branches: MAIN
CVS tags: version_1_0_3, version_1_0_2, version_1_0_1, version_1_0_0, version_0_99_5, version_0_99_4, HEAD
Smaller output, quicker building of connection matrix.

    1: #!/usr/bin/perl
    2: $|=1;
    3: # The LearningOnline Network with CAPA
    4: # Cluster Status
    5: #
    6: # $Id: clusterstatus.pl,v 1.17 2003/08/05 18:47:21 www Exp $
    7: 
    8: use lib '/home/httpd/lib/perl/';
    9: use LONCAPA::Configuration;
   10: use strict;
   11: 
   12: use LWP::UserAgent();
   13: use HTTP::Headers;
   14: use IO::File;
   15: 
   16: my %host=();
   17: my $oneday=60*60*24;
   18: 
   19: my %connectionstatus=();
   20: my %perlvar=();
   21: 
   22: my $mode;
   23: my $concount=0;
   24: my $fromcache;
   25: 
   26: my %domaindescription = ();
   27: my %domain_auth_def = ();
   28: my %domain_auth_arg_def = ();
   29: 
   30: my %hostname=();
   31: my %hostip=();
   32: my %hostdom=();
   33: my %hostrole=();
   34: my %libserv=();
   35: 
   36: my $maxusers=0;
   37: my $maxload=0;
   38: my $totalusers=0;
   39: 
   40: my %FORM=();
   41: 
   42: my $stat_total=0;
   43: my $stat_notyet=0;
   44: my $stat_fromcache=0;
   45: 
   46: sub select_form {
   47:     my ($def,$name,%hash) = @_;
   48:     my $selectform = "<select name=\"$name\" size=\"1\">\n";
   49:     foreach (sort keys %hash) {
   50:         $selectform.="<option value=\"$_\" ".
   51:             ($_ eq $def ? 'selected' : '').
   52:                 ">".$hash{$_}."</option>\n";
   53:     }
   54:     $selectform.="</select>";
   55:     return $selectform;
   56: }
   57: 
   58: 
   59: sub key {
   60:     my ($local,$url)=@_;
   61:     my $key=$local.'_'.$url;
   62:     $key=~s/\W/\_/gs;
   63:     return $key;
   64: }
   65: 
   66: sub hidden {
   67:     my ($name,$value)=@_;
   68:     print "\n<input type='hidden' name='$name' value='$value' />";
   69: }
   70: 
   71: sub request {
   72:     my ($local,$url,$cachetime)=@_;
   73:     $cachetime*=(0.5+rand);
   74:     my $key=&key($local,$url);
   75:     my $reply='';
   76:     $stat_total++;
   77: # if fromcache flag is set, only return cached values
   78:     if ($fromcache) {
   79: 	if ($FORM{$key.'_time'}) {
   80: 	    return $FORM{$key};
   81: 	    $stat_fromcache++;
   82: 	} else {
   83: 	    return 'not_yet';
   84: 	    $stat_notyet++;
   85: 	}
   86:     }
   87: # normal mode, refresh when expired or not yet present
   88:     if ($FORM{$key.'_time'}) {
   89: 	if ((time-$FORM{$key.'_time'})<$cachetime) {
   90: 	    $reply=$FORM{$key};
   91: 	    &hidden($key.'_time',$FORM{$key.'_time'});
   92: 	    $stat_fromcache++;
   93: 	}
   94:     }
   95:     unless ($reply) {
   96: 	unless ($hostname{$local}) { 
   97: 	    $reply='local_unknown'; 
   98: 	} else {
   99: 
  100: 	    my $ua=new LWP::UserAgent(timeout => 10);
  101:     
  102: 	    my $request=new HTTP::Request('GET',
  103: 					  "http://".$hostname{$local}.$url);
  104: 	    $request->authorization_basic('lonadm','litelite');
  105: 
  106: 	    my $response=$ua->request($request);
  107: 
  108: 	    unless ($response->is_success) { 
  109: 		$reply='local_error'; 
  110: 	    } else {
  111: 		$reply=$response->content;
  112: 		chomp($reply);
  113: 	    }
  114: 	}
  115: 	&hidden($key.'_time',time);
  116:     }
  117:     &hidden($key,$reply);
  118:     return $reply;
  119: }
  120: 
  121: # ============================================= Are local and remote connected?
  122: sub connected {
  123:     my ($local,$remote)=@_;
  124:     $local=~s/\W//g;
  125:     $remote=~s/\W//g;
  126: 
  127:     unless ($hostname{$remote}) { return 'remote_unknown'; }
  128:     my $url='/cgi-bin/ping.pl?'.$remote;
  129: #
  130: # Slowly phase this in: if not cached, only do 5 percent of the cases,
  131: # but always do the first five. 
  132: #
  133:     unless ($FORM{&key($local,$url)}) {
  134: 	unless (($concount<=5) || (rand>0.95)) {
  135: 	    $stat_total++;
  136: 	    $stat_notyet++; 
  137: 	    return 'not_yet'; 
  138: 	} else {
  139: 	    $concount++;
  140: 	}
  141:     }
  142: #
  143: # Actually do the query
  144: #
  145:     &statuslist($local,'connecting '.$remote);
  146:     my $reply=&request($local,$url,3600);
  147:     $reply=(split("\n",$reply))[0];
  148:     $reply=~s/\W//g;
  149:     if ($reply ne $remote) { return $reply; }
  150:     return 'ok';
  151: }
  152: # ============================================================ Get a reply hash
  153: 
  154: sub replyhash {
  155:     my %returnhash=();
  156:     foreach (split(/\&/,&request(@_))) {
  157: 	my ($name,$value)=split(/\=/,$_);
  158: 	if ($name) {
  159: 	    unless ($value) { $value=''; }
  160: 	    $returnhash{$name}=$value;
  161: 	}
  162:     }
  163:     return %returnhash;
  164: }
  165: 
  166: # ================================================================ Link to host
  167: 
  168: sub otherwindow {
  169:     my ($local,$url,$label)=@_;
  170:     return
  171:   " <a href='http://$hostname{$local}$url' target='newwin$local'>$label</a> ";
  172: }
  173: 
  174: sub login {
  175:     my $local=shift;
  176:     print &otherwindow($local,'/adm/login?domain='.$perlvar{'lonDefDomain'},
  177: 		       'Login');
  178: }
  179: 
  180: sub runloncron {
  181:     my $local=shift;
  182:     print &otherwindow($local,'/cgi-bin/loncron.pl','Run loncron');
  183: }
  184: 
  185: sub loncron {
  186:     my $local=shift;
  187:     print &otherwindow($local,'/lon-status','loncron');
  188: }
  189: 
  190: sub lonc {
  191:     my $local=shift;
  192:     print &otherwindow($local,'/lon-status/loncstatus.txt','lonc');
  193: }
  194: 
  195: sub lond {
  196:     my $local=shift;
  197:     print &otherwindow($local,'/lon-status/londstatus.txt','lond');
  198: }
  199: 
  200: sub users {
  201:     my $local=shift;
  202:     print &otherwindow($local,'/cgi-bin/userstatus.pl','Users');
  203: }
  204: 
  205: sub versions {
  206:     my $local=shift;
  207:     print &otherwindow($local,'/cgi-bin/lonversions.pl','Versions');
  208: }
  209: 
  210: sub server {
  211:     my $local=shift;
  212:     print &otherwindow($local,'/server-status','Server Status');
  213: }
  214: 
  215: # ========================================================= Produce a green bar
  216: sub bar {
  217:     my $parm=shift;
  218:     my $number=int($parm+0.5);
  219:     print "<table><tr><td bgcolor='#225522'><font color='#225522'>";
  220:     for (my $i=0;$i<$number;$i++) {
  221: 	print "+";
  222:     }
  223:     print "</font></table>";
  224: }
  225: 
  226: # ========================================================== Show server status
  227: 
  228: sub serverstatus {
  229:     my ($local,$trouble)=@_;
  230:     print (<<ENDHEADER);
  231: <a name="$local" />
  232: <table width="100%" bgcolor="#225522" cellspacing="2" cellpadding="2" border="0">
  233: <tr><td bgcolor="#BBDDBB"><font color="#225522" face="arial"><b>
  234: $local $hostdom{$local}</b> <tt>($hostname{$local}; $hostrole{$local})</tt>
  235: <br />$domaindescription{$hostdom{$local}}
  236: </font></th></tr><tr><td bgcolor="#DDDDBB"><font color="#225522">
  237: ENDHEADER
  238:     &login($local);&server($local);&users($local);&versions($local);
  239:     &loncron($local);&lond($local);&lonc($local);&runloncron($local);
  240:     print "</font></td></tr>";
  241:     if ($trouble) {
  242: 	print ("<tr><td bgcolor='#DDBBBB'><font color='#552222' size='+2'>$trouble</font></td></tr>");
  243:     }
  244:     print "<tr><td bgcolor='#BBBBBB'>";
  245: # version
  246:     if ($host{$local.'_version'}) {
  247: 	print "<br />Version: ".$host{$local.'_version'}
  248:     }
  249: # load
  250:     if (($host{$local.'_load_doomed'}>0.5) || ($mode eq 'load_doomed')) {
  251: 	print "<br />Load: ".$host{$local.'_load'}
  252:     }
  253: # users
  254:     if (($host{$local.'_users_doomed'}>10) || ($mode eq 'users_doomed')) {
  255: 	print "<br />Active Users: ".$host{$local.'_users'}
  256:     }
  257: 
  258: # checkrpms
  259:     if ($host{$local.'_checkrpms'}) {
  260: 	print "<br />RPMs: ".$host{$local.'_checkrpms'}
  261:     }
  262: # mysql
  263:     if ($host{$local.'_mysql'}) {
  264: 	print "<br />MySQL Database: ".$host{$local.'_mysql'}
  265:     }
  266: # connections
  267:     if ($host{$local.'_notconnected'}) {
  268: 	print "<br />Not connected: ";
  269: 	foreach (split(/ /,$host{$local.'_notconnected'})) {
  270: 	    if ($_) {
  271: 		print " <a href='#$_'>$_</a>";
  272: 	    }
  273: 	}
  274:     }
  275: # errors
  276:     if ($host{$local.'_errors'}) {
  277: 	print "<br />loncron errors: ".$host{$local.'_errors'};
  278:     }
  279:     print "</td></tr></table><br />";
  280: }
  281: 
  282: # =========================================================== Doomedness sorted
  283: 
  284: sub doomedness {
  285:     my $crit=shift;
  286:     my %alldoomed=();
  287:     my @allhosts=();
  288:     foreach (keys %host) {
  289: 	if ($_=~/^(\w+)\_$crit$/) {
  290: 	    if ($host{$_}) {
  291: 		push (@allhosts,$1);
  292: 		$alldoomed{$1}=$host{$_};
  293: 	    }
  294: 	}
  295:     }
  296:     return sort { $alldoomed{$b} <=> $alldoomed{$a} } @allhosts;
  297: }
  298: 
  299: sub resetvars {
  300:    $maxusers=0;
  301:    $maxload=0;
  302:    $totalusers=0;
  303:    $stat_total=0;
  304:    $stat_notyet=0;
  305:    $stat_fromcache=0;
  306:    $concount=0;
  307:    undef %host;
  308:    %host=();
  309: }
  310: 
  311: sub mainloop {
  312:     &resetvars();
  313: # ==================================================== Main Loop over all Hosts
  314: 
  315: foreach my $local (sort keys %hostname) {
  316:     $host{$local.'_unresponsive_doomed'}=0;
  317: # -- Check general status
  318:     &statuslist($local,'General');
  319:     my %loncron=&replyhash($local,'/lon-status/loncron_simple.txt',1200);
  320:     if (defined($loncron{'local_error'})) {
  321: 	$host{$local.'_loncron'}='Could not determine.';
  322: 	$host{$local.'_unresponsive_doomed'}++;
  323:     } else {
  324: 	if ((time-$loncron{'time'})>$oneday) {
  325: 	    $host{$local.'_loncron'}='Stale.';
  326: 	    $host{$local.'_unresponsive_doomed'}++;
  327: 	} else {
  328: 	    $host{$local.'_loncron_doomed'}=$loncron{'notices'}
  329: 	                                 +4*$loncron{'warnings'}
  330: 	                               +100*$loncron{'errors'};
  331: 	    $host{$local.'_errors'}=$loncron{'errors'};
  332: 	}
  333:     }
  334: # -- Check version
  335:     &statuslist($local,'Version');
  336:     my $version=&request($local,'/lon-status/version.txt',7200);
  337:     if ($version eq 'local_error') {
  338: 	$host{$local.'_version'}='Could not determine.';
  339: 	$host{$local.'_unresponsive_doomed'}++;
  340:     } else {
  341: 	$host{$local.'_version'}=$version;
  342:     }
  343: # -- Check user status
  344:     &statuslist($local,'Users');
  345:     my %userstatus=&replyhash($local,'/cgi-bin/userstatus.pl?simple',600);
  346:     if (defined($userstatus{'local_error'})) {
  347: 	$host{$local.'_userstatus'}='Could not determine.';
  348: 	$host{$local.'_unresponsive_doomed'}++;
  349:     } else {
  350: 	$host{$local.'_users_doomed'}=$userstatus{'Active'};
  351: 	$host{$local.'_users'}=$userstatus{'Active'};
  352: 	unless ($host{$local.'_users'}) { $host{$local.'_users'}=0; }
  353: 	if ($host{$local.'_users'}>$maxusers) { 
  354: 	    $maxusers=$host{$local.'_users'};
  355: 	}
  356: 	$totalusers+=$host{$local.'_users'};
  357: 	my ($sload,$mload,$lload)=split(/ /,$userstatus{'loadavg'});
  358: 	$host{$local.'_load_doomed'}=$mload;
  359: 	if ($mload>$maxload) { 
  360: 	    $maxload=$mload;
  361: 	}
  362: 	$host{$local.'_load'}=$userstatus{'loadavg'};
  363:     }
  364: # -- Check mysql status
  365:     &statuslist($local,'Database');
  366:     my %mysql=&replyhash($local,'/lon-status/mysql.txt',3600);
  367:     if (defined($mysql{'local_error'})) {
  368: 	$host{$local.'_mysql'}='Could not determine.';
  369: 	$host{$local.'_unresponsive_doomed'}++;
  370:     } else {
  371: 	if ((time-$mysql{'time'})>(7*$oneday)) {
  372: 	    if ($hostrole{$local} eq 'library') {
  373: 		$host{$local.'_mysql'}='Stale.';
  374: 		$host{$local.'_mysql_doomed'}=1;
  375: 	    }
  376: 	    if ($mysql{'mysql'} eq 'defunct') {
  377: 		$host{$local.'_mysql'}='Defunct (maybe stale).';
  378: 		$host{$local.'_mysql_doomed'}=2;
  379: 	    }
  380: 	} elsif ($mysql{'mysql'} eq 'defunct') {
  381: 	    $host{$local.'_mysql'}='Defunct.';
  382: 	    $host{$local.'_mysql_doomed'}=3;
  383: 	}
  384:     }
  385: # -- Check rpm status
  386:     &statuslist($local,'RPMs');
  387:     my %checkrpms=&replyhash($local,'/lon-status/checkrpms.txt',7200);
  388:     if (defined($checkrpms{'local_error'})) {
  389: 	$host{$local.'_checkrpms'}='Could not determine.';
  390: 	$host{$local.'_unresponsive_doomed'}++;
  391:     } else {
  392: 	if ((time-$checkrpms{'time'})>(4*$oneday)) {
  393: 	    $host{$local.'_checkrpms'}='Stale.';
  394: 	    $host{$local.'_checkrpms_doomed'}=50;
  395: 	    $host{$local.'_unresponsive_doomed'}++;
  396: 	} elsif ($checkrpms{'status'} eq 'fail') {
  397: 	    $host{$local.'_checkrpms'}='Could not checked RPMs.';
  398: 	    $host{$local.'_checkrpms_doomed'}=100;
  399: 	} elsif ($checkrpms{'rpmcount'}) {
  400: 	    $host{$local.'_checkrpms'}='Outdated RPMs: '.
  401: 		$checkrpms{'rpmcount'};
  402: 	    $host{$local.'_checkrpms_doomed'}=$checkrpms{'rpmcount'};
  403: 	}
  404:     }
  405: # -- Check connections
  406:     &statuslist($local,'Connections');
  407:     $host{$local.'_notconnected'}='';
  408:     $host{$local.'_notconnected_doomed'}=0;
  409:     foreach my $remote (sort keys %hostname) {
  410: 	my $status=&connected($local,$remote);
  411: 	$connectionstatus{$local.'_TO_'.$remote}=$status;
  412: 	unless (($status eq 'ok') || ($status eq 'not_yet')) {
  413: 	    $host{$local.'_notconnected'}.=' '.$remote;
  414: 	    $host{$local.'_notconnected_doomed'}++;
  415: 	}
  416:     }
  417: # =============================================================== End Main Loop
  418: }
  419: 
  420: }
  421: 
  422: sub reports {
  423: # ====================================================================== Output
  424:     if ($mode=~/\_doomed$/) {
  425: # Output by doomedness
  426: 	foreach (&doomedness($mode)) {
  427: 	    &serverstatus($_);
  428: 	}
  429:     } elsif ($mode eq 'connections') {
  430: 	print 
  431:        "<table cellspacing='3' cellpadding='3' border='0' bgcolor='#225522'>".
  432:        "<tr><td bgcolor='#225522'>&nbsp;</td>";
  433: 	foreach my $remote (sort keys %hostname) {
  434: 	    print '<td bgcolor="#DDDDBB">'.$remote.'</td>';
  435: 	}
  436: 	print "</tr>\n";
  437: # connection matrix
  438: 	foreach my $local (sort keys %hostname) {
  439: 	    print '<tr><td bgcolor="#DDDDBB">'.$local.'</td>';
  440: 	    foreach my $remote (sort keys %hostname) {
  441: 		if ($connectionstatus{$local.'_TO_'.$remote} eq 'not_yet') {
  442: 		    my $cellcolor='#FFFFFF';
  443: 		    if ($local eq $remote) { $cellcolor='#DDDDDD'; }
  444: 		    print '<td bgcolor="'.$cellcolor.'"><font color="#555522" size="-2">not yet tested</font></td>';
  445: 		} elsif ($connectionstatus{$local.'_TO_'.$remote} eq 'ok') {
  446: 		    my $cellcolor='#BBDDBB';
  447: 		    if ($local eq $remote) { $cellcolor='#99DD99'; }
  448: 		    print 
  449: '<td bgcolor="'.$cellcolor.'"><font color="#225522" face="arial"><b>ok</b></td>';
  450: 		} else {
  451: 		    my $cellcolor='#DDBBBB';
  452: 		    if ($connectionstatus{$local.'_TO_'.$remote} eq 'local_error') {
  453: 			if ($local eq $remote) { 
  454: 			    $cellcolor='#DD88AA'; 
  455: 			} else {
  456: 			    $cellcolor='#DDAACC';
  457: 			}
  458: 		    } else {
  459: 			if ($local eq $remote) { $cellcolor='#DD9999'; }
  460: 		    }
  461: 		    print 
  462: 		  '<td bgcolor="'.$cellcolor.'"><font color="#552222" size="-2">'.
  463: 		  $connectionstatus{$local.'_TO_'.$remote}.'<br />';
  464: 		    &lonc($local); &lond($remote);
  465: 		    print '</td>';
  466: 		}
  467: 	    }
  468: 	    print "</tr>\n";
  469: 	}
  470: 	print "</table>";
  471:     } elsif ($mode eq 'users') {
  472: # Users
  473: 	if ($maxusers) {
  474: 	    my $factor=50/$maxusers;
  475: 	    print "<h3>Total active user(s): $totalusers</h3>". 
  476:        "<table cellspacing='3' cellpadding='3' border='0' bgcolor='#225522'>";
  477: 
  478: 	    foreach my $local (sort keys %hostname) {
  479: 		if (defined($host{$local.'_users'})) {
  480: 		    print 
  481: '<tr><td bgcolor="#BBDDBB"><font face="arial" color="#225522" size="+1">'.$local.
  482: 			'</font><br /><font size="-2">'.
  483: 			$domaindescription{$hostdom{$local}}.
  484: 		       '</font></td><td bgcolor="#DDDDBB">';
  485: 		    &users($local);
  486: 		    print 
  487: 	      '</td><td bgcolor="#DDDDBB"><font face="arial" color="#225522">'.
  488: 	      $host{$local.'_users'}.'</font></td><td bgcolor="#DDDDBB"';
  489: 		    &bar($factor*$host{$local.'_users'});
  490: 		    print "</td></tr>\n";
  491: 		}
  492: 	    }
  493: 	    print "</table>";
  494: 	} else {
  495: 	    print "No active users logged in.";
  496: 	}
  497:     } elsif ($mode eq 'load') {
  498: # Load
  499: 	if ($maxload) {
  500: 	    my $factor=50/$maxload; 
  501: 	    print
  502:        "<table cellspacing='3' cellpadding='3' border='0' bgcolor='#225522'>";
  503: 	    foreach my $local (sort keys %hostname) {
  504: 		if (defined($host{$local.'_load_doomed'})) {
  505: 		    print 
  506: '<tr><td bgcolor="#BBDDBB"><font face="arial" color="#225522" size="+1">'.
  507:                         $local.
  508: 			'</font><br /><font size="-2">'.
  509: 			$domaindescription{$hostdom{$local}}.
  510: 		       '</font></td><td bgcolor="#DDDDBB">';
  511: 		    &server($local);
  512: 		    print 
  513: 	      '</td><td bgcolor="#DDDDBB"><font face="arial" color="#225522">'.
  514: 	      $host{$local.'_load_doomed'}.'</font></td><td bgcolor="#DDDDBB"';
  515: 		    &bar($factor*$host{$local.'_load_doomed'});
  516: 		    print "</td></tr>\n";
  517: 		}
  518: 	    }
  519: 	    print "</table>";
  520: 	} else {
  521: 	    print "No workload.";
  522: 	}
  523:     } elsif ($mode eq 'trouble') {
  524: 	my $count=0;
  525: 	foreach my $local (sort keys %hostname) {
  526: 	    my $trouble='';
  527: 	    if ($host{$local.'_unresponsive_doomed'}>3) {
  528: 		$trouble='Does not respond to several queries.<br />';
  529: 	    }
  530: 	    if ($host{$local.'_errors'}) {
  531: 		$trouble='Has loncron errors.<br />';
  532: 	    } elsif ($host{$local.'_loncron_doomed'}>600) {
  533: 		$trouble='High loncron count.<br />';
  534: 	    }
  535: 	    if ($host{$local.'_load_doomed'}>5) {
  536: 		$trouble='High load.<br />';
  537: 	    }
  538: 	    if ($host{$local.'_users_doomed'}>200) {
  539: 		$trouble='High user volume.<br />';
  540: 	    }
  541: 	    if ($host{$local.'_mysql_doomed'}>1) {
  542: 		$trouble='MySQL database apparently offline.<br />';
  543: 	    }
  544: 	    if ($host{$local.'_checkrpms_doomed'}>100) {
  545: 		$trouble='RPMs outdated.<br />';
  546: 	    }
  547: 	    if ($trouble) { $count++; &serverstatus($local,$trouble); }
  548: 	}
  549: 	unless ($count) { print "No mayor trouble."; }
  550:     }
  551: }
  552: 
  553: # ====================================================================== Status
  554: sub statuslist {
  555:     my ($local,$what)=@_;
  556:     print 
  557: "<script>document.prgstat.progress.value='Testing $local ($hostname{$local}): $what';</script>\n";
  558: }
  559: 
  560: # =============================================================================
  561: # =============================================================================
  562: # Main program
  563: #
  564: # ========================================================= Get form parameters
  565: my $buffer;
  566: 
  567: read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});
  568: my @pairs=split(/&/,$buffer);
  569: my $pair; my $name; my $value;
  570: undef %FORM;
  571: %FORM=();
  572: foreach $pair (@pairs) {
  573:     ($name,$value) = split(/=/,$pair);
  574:     $value =~ tr/+/ /;
  575:     $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  576:     $FORM{$name}=$value;
  577: } 
  578: 
  579: $buffer=$ENV{'QUERY_STRING'};
  580: @pairs=split(/&/,$buffer);
  581: foreach $pair (@pairs) {
  582:     ($name,$value) = split(/=/,$pair);
  583:     $value =~ tr/+/ /;
  584:     $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  585:     $FORM{$name}=$value;
  586: } 
  587: 
  588: # ====================================================== Determine refresh rate
  589: 
  590: my $refresh=(($FORM{'refresh'}=~/^\d+$/)?$FORM{'refresh'}:30);
  591: if ($refresh<30) { $refresh=30; }
  592: my $starttime=time;
  593: 
  594: # ============================================================== Determine mode
  595: 
  596: my %modes=('trouble' => 'Trouble',
  597: 	   'users_doomed' => 'Doomed: Users',
  598: 	   'loncron_doomed' => 'Doomed: General (loncron)',
  599: 	   'mysql_doomed' => 'Doomed: Database (mysql)',
  600: 	   'notconnected_doomed' => 'Doomed: Connections',
  601: 	   'checkrpms_doomed' => 'Doomed: RPMs',
  602: 	   'load_doomed' => 'Doomed: Load',
  603: 	   'unresponsive_doomed' => 'Doomed: Status could not be determined',
  604: 	   'users' => 'User Report',
  605: 	   'load' => 'Load Report',
  606: 	   'connections' => 'Connections Matrix');
  607: 
  608: $mode=$FORM{'mode'};
  609: unless ($modes{$mode}) { $mode='trouble'; }
  610: # ================================================================ Send Headers
  611: print "Content-type: text/html\n\n".
  612:     "<html><body bgcolor='#FFFFFF'>\n";
  613: # -------------------- Read loncapa.conf (and by default, loncapa_apache.conf).
  614: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
  615: %perlvar=%{$perlvarref};
  616: undef $perlvarref; # remove since sensitive and not needed
  617: delete $perlvar{'lonReceipt'}; # remove since sensitive and not needed
  618: delete $perlvar{'lonSqlAccess'}; # remove since sensitive and not needed
  619: 
  620: # ------------------------------------------------------------- Read hosts file
  621: {
  622:     my $config=IO::File->new("$perlvar{'lonTabDir'}/hosts.tab");
  623: 
  624:     while (my $configline=<$config>) {
  625:        $configline=~s/#.*$//;
  626:        unless ($configline=~/\w/) { next; } 
  627:        my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
  628:        $hostname{$id}=$name;
  629:        $hostdom{$id}=$domain;
  630:        $hostrole{$id}=$role;
  631:        $hostip{$id}=$ip;
  632:        if (($role eq 'library') && ($id ne $perlvar{'lonHostID'})) {
  633: 	   $libserv{$id}=$name;
  634:        }
  635:     }
  636: }
  637: # ------------------------------------------------------------ Read domain file
  638: {
  639:     my $fh=IO::File->new($perlvar{'lonTabDir'}.'/domain.tab');
  640:     if ($fh) {
  641:        while (<$fh>) {
  642:            next if (/^(\#|\s*$)/);
  643:            chomp;
  644:            my ($domain, $domain_description, $def_auth, $def_auth_arg)
  645:                = split(/:/,$_,4);
  646:            $domain_auth_def{$domain}=$def_auth;
  647:            $domain_auth_arg_def{$domain}=$def_auth_arg;
  648:            $domaindescription{$domain}=$domain_description;
  649:        }
  650:     }
  651: }
  652: 
  653: print "<img src='/adm/lonIcons/lonlogos.gif' align='right' /><h1>LON-CAPA Cluster Status ".localtime()."</h1>";
  654: print "<form name='prgstat'>\n".
  655: "<input type='text' name='progress' value='Starting ...' size='100' /><br />".
  656: "</form>\n";;
  657: print "<form name='status' method='post'>\n";
  658: print 'Choose next report: '.&select_form($mode,'mode',%modes).'<hr />';
  659: &hidden('refresh',$refresh);
  660: 
  661:     if (!$FORM{'runonetime'}) {
  662: 	print 
  663:    "<h3>Gathering initial cluster data</h3>This may take some time ...<br />";
  664: 	$fromcache=0;
  665: 	&mainloop();
  666: 	&statuslist('Done initial run.');
  667: 	&reports();
  668:     } else {
  669: 	$fromcache=1;
  670: 	&mainloop();
  671: 	&statuslist('Done gathering cached data');
  672: 	&reports();
  673: 	$fromcache=0;
  674: 	&mainloop();
  675:     }
  676:     &hidden('runonetime',1);
  677: print '<tt><br />Total number of queries: '.$stat_total.
  678:           '<br />Percent complete: '.
  679: 	  int(($stat_total-$stat_notyet)/$stat_total*100.).
  680: 	  '<br />Percent from cache: '.
  681:           int($stat_fromcache/$stat_total*100.).'</tt>';
  682: 
  683: # ============================================================== Close, refresh
  684: print "</form><script>";
  685: my $runtime=time-$starttime;
  686: if (($refresh-$runtime)<0) {
  687:     print "document.status.submit();";
  688: } else {
  689:     my $refreshtime=int(1000*($refresh-$runtime));
  690:     print "setTimeout('document.status.submit()',$refreshtime);\n".
  691:           "document.prgstat.progress.value='Will automatically refresh ($refresh secs refresh cycle)'";
  692: }
  693: print "</script></body></html>";
  694: exit 0;

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