--- loncom/cgi/clusterstatus.pl	2003/07/30 21:20:16	1.8
+++ loncom/cgi/clusterstatus.pl	2003/09/14 18:24:34	1.22
@@ -1,14 +1,34 @@
 #!/usr/bin/perl
 $|=1;
-# The LearningOnline Network with CAPA
-# Cluster Status
-# (Versions
-# (Running loncron
-# 09/06/01 Gerd Kortemeyer)
-# 02/18/02,02/19/02 Gerd Kortemeyer)
+# Generates a html page showing various sataus reports about the cluster
+# $Id: clusterstatus.pl,v 1.22 2003/09/14 18:24:34 www Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
 
 use lib '/home/httpd/lib/perl/';
 use LONCAPA::Configuration;
+use strict;
 
 use LWP::UserAgent();
 use HTTP::Headers;
@@ -18,6 +38,48 @@ my %host=();
 my $oneday=60*60*24;
 
 my %connectionstatus=();
+my %perlvar=();
+
+my $mode;
+my $concount=0;
+my $fromcache;
+
+my %domaindescription = ();
+my %domain_auth_def = ();
+my %domain_auth_arg_def = ();
+my %domain_lang_def=();
+my %domain_city=();
+my %domain_longi=();
+my %domain_lati=();
+
+my %hostname=();
+my %hostip=();
+my %hostdom=();
+my %hostrole=();
+my %libserv=();
+
+my $maxusers=0;
+my $maxload=0;
+my $totalusers=0;
+
+my %FORM=();
+
+my $stat_total=0;
+my $stat_notyet=0;
+my $stat_fromcache=0;
+
+sub select_form {
+    my ($def,$name,%hash) = @_;
+    my $selectform = "<select name=\"$name\" size=\"1\">\n";
+    foreach (sort keys %hash) {
+        $selectform.="<option value=\"$_\" ".
+            ($_ eq $def ? 'selected' : '').
+                ">".$hash{$_}."</option>\n";
+    }
+    $selectform.="</select>";
+    return $selectform;
+}
+
 
 sub key {
     my ($local,$url)=@_;
@@ -33,13 +95,26 @@ sub hidden {
 
 sub request {
     my ($local,$url,$cachetime)=@_;
+    $cachetime*=(0.5+rand);
     my $key=&key($local,$url);
     my $reply='';
+    $stat_total++;
+# if fromcache flag is set, only return cached values
+    if ($fromcache) {
+	if ($FORM{$key.'_time'}) {
+	    return $FORM{$key};
+	    $stat_fromcache++;
+	} else {
+	    return 'not_yet';
+	    $stat_notyet++;
+	}
+    }
+# normal mode, refresh when expired or not yet present
     if ($FORM{$key.'_time'}) {
 	if ((time-$FORM{$key.'_time'})<$cachetime) {
 	    $reply=$FORM{$key};
 	    &hidden($key.'_time',$FORM{$key.'_time'});
-	    &hidden($key.'_fromcache',1);
+	    $stat_fromcache++;
 	}
     }
     unless ($reply) {
@@ -47,7 +122,7 @@ sub request {
 	    $reply='local_unknown'; 
 	} else {
 
-	    my $ua=new LWP::UserAgent(timeout => 20);
+	    my $ua=new LWP::UserAgent(timeout => 10);
     
 	    my $request=new HTTP::Request('GET',
 					  "http://".$hostname{$local}.$url);
@@ -77,16 +152,23 @@ sub connected {
     unless ($hostname{$remote}) { return 'remote_unknown'; }
     my $url='/cgi-bin/ping.pl?'.$remote;
 #
-# Slowly phase this in: if not cached, only do 10 percent of the cases 
+# Slowly phase this in: if not cached, only do 5 percent of the cases,
+# but always do the first five. 
 #
     unless ($FORM{&key($local,$url)}) {
-	unless (rand>0.9) { return 'not_yet'; }
+	unless (($concount<=5) || (rand>0.95)) {
+	    $stat_total++;
+	    $stat_notyet++; 
+	    return 'not_yet'; 
+	} else {
+	    $concount++;
+	}
     }
 #
 # Actually do the query
 #
     &statuslist($local,'connecting '.$remote);
-    my $reply=&request($local,$url,1800);
+    my $reply=&request($local,$url,3600);
     $reply=(split("\n",$reply))[0];
     $reply=~s/\W//g;
     if ($reply ne $remote) { return $reply; }
@@ -106,129 +188,240 @@ sub replyhash {
     return %returnhash;
 }
 
-# ========================================================== Show server status
+# ================================================================ Link to host
 
 sub otherwindow {
     my ($local,$url,$label)=@_;
     return
-  "<a href='http://$hostname{$local}$url' target='newwin$local'>$label</a>";
+  " <a href='http://$hostname{$local}$url' target='newwin$local'>$label</a> ";
 }
 
-sub serverstatus {
+sub login {
     my $local=shift;
-    print "\n<hr /><h3>$local $hostdom{$local} ($hostname{$local}; $hostrole{$local})</h3>\n";
-# checkrpms
-    if ($host{$local.'_checkrpms'}) {
-	print "<br />RPMs: ".$host{$local.'_checkrpms'}
-    }
-# mysql
-    if ($host{$local.'_mysql'}) {
-	print "<br />MySQL Database: ".$host{$local.'_mysql'}
-    }
+    print &otherwindow($local,'/adm/login?domain='.$perlvar{'lonDefDomain'},
+		       'Login');
 }
 
-# ====================================================================== Status
-sub statuslist {
-    my ($local,$what)=@_;
-    print 
-"<script>document.prgstat.progress.value='Testing $local ($hostname{$local}): $what';</script>\n";
+sub runloncron {
+    my $local=shift;
+    print &otherwindow($local,'/cgi-bin/loncron.pl','Run loncron');
 }
 
-#
-# Main program
-#
-# ========================================================= Get form parameters
-my $buffer;
+sub loncron {
+    my $local=shift;
+    print &otherwindow($local,'/lon-status','loncron');
+}
 
-read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});
-my @pairs=split(/&/,$buffer);
-my $pair; my $name; my $value;
-undef %FORM;
-%FORM=();
-foreach $pair (@pairs) {
-    ($name,$value) = split(/=/,$pair);
-    $value =~ tr/+/ /;
-    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
-    $FORM{$name}=$value;
-} 
+sub lonc {
+    my $local=shift;
+    print &otherwindow($local,'/lon-status/loncstatus.txt','lonc');
+}
 
-$buffer=$ENV{'QUERY_STRING'};
-@pairs=split(/&/,$buffer);
-foreach $pair (@pairs) {
-    ($name,$value) = split(/=/,$pair);
-    $value =~ tr/+/ /;
-    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
-    $FORM{$name}=$value;
-} 
+sub lond {
+    my $local=shift;
+    print &otherwindow($local,'/lon-status/londstatus.txt','lond');
+}
 
-# ====================================================== Determine refresh rate
+sub users {
+    my $local=shift;
+    print &otherwindow($local,'/cgi-bin/userstatus.pl','Users');
+}
 
-my $refresh=(($FORM{'refresh'}=~/^\d+$/)?$FORM{'refresh'}:60);
-if ($refresh<30) { $refresh=30; }
-my $starttime=time;
-# ================================================================ Send Headers
-print "Content-type: text/html\n\n".
-    "<html><body bgcolor=#FFFFFF>\n";
-# -------------------- Read loncapa.conf (and by default, loncapa_apache.conf).
-my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
-my %perlvar=%{$perlvarref};
-undef $perlvarref; # remove since sensitive and not needed
-delete $perlvar{'lonReceipt'}; # remove since sensitive and not needed
-delete $perlvar{'lonSqlAccess'}; # remove since sensitive and not needed
+sub versions {
+    my $local=shift;
+    print &otherwindow($local,'/cgi-bin/lonversions.pl','Versions');
+}
 
-# ------------------------------------------------------------- Read hosts file
-{
-    my $config=IO::File->new("$perlvar{'lonTabDir'}/hosts.tab");
+sub server {
+    my $local=shift;
+    print &otherwindow($local,'/server-status','Server Status');
+}
 
-    $total=0;
-    while (my $configline=<$config>) {
-       $configline=~s/#.*$//;
-       unless ($configline=~/\w/) { next; } 
-       my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
-       $hostname{$id}=$name;
-       $hostdom{$id}=$domain;
-       $hostrole{$id}=$role;
-       $hostip{$id}=$ip;
-       $total++;
-       if (($role eq 'library') && ($id ne $perlvar{'lonHostID'})) {
-	   $libserv{$id}=$name;
-       }
+sub announcement {
+    my $local=shift;
+    print &otherwindow($local,'/announcement.txt','Announcement');
+}
+
+sub takeonline {
+    my $local=shift;
+    print &otherwindow($local,'/cgi-bin/takeonline.pl','Take online');
+}
+
+# ========================================================= Produce a green bar
+sub bar {
+    my $parm=shift;
+    my $number=int($parm+0.5);
+    print "<table><tr><td bgcolor='#225522'><font color='#225522'>";
+    for (my $i=0;$i<$number;$i++) {
+	print "+";
     }
+    print "</font></table>";
 }
 
-print "<h1>Cluster Status ".localtime()."</h1>";
-print "<form name='prgstat'>\n".
-"<input type='text' name='progress' value='Starting ...' size='100' /><br />".
-"</form>\n";;
-print "<form name='status' method='post'>\n";
-&hidden('refresh',$refresh);
+# ========================================================== Show server status
+
+sub serverstatus {
+    my ($local,$trouble)=@_;
+    print (<<ENDHEADER);
+<a name="$local" />
+<table width="100%" bgcolor="#225522" cellspacing="2" cellpadding="2" border="0">
+<tr><td bgcolor="#BBDDBB"><font color="#225522" face="arial"><b>
+$local $hostdom{$local}</b> <tt>($hostname{$local}; $hostrole{$local})</tt>
+<br />$domaindescription{$hostdom{$local}}
+$domain_city{$hostdom{$local}}
+</font></th></tr><tr><td bgcolor="#DDDDBB"><font color="#225522">
+ENDHEADER
+    &login($local);&server($local);&users($local);&versions($local);
+    &announcement($local);
+    &loncron($local);&lond($local);&lonc($local);&runloncron($local);
+    print "</font></td></tr>";
+    if ($trouble) {
+	print ("<tr><td bgcolor='#DDBBBB'><font color='#552222' size='+2'>$trouble</font></td></tr>");
+    }
+    print "<tr><td bgcolor='#BBBBBB'>";
+# re-routing
+    if ($host{$local.'_reroute'}) {
+	print "<br />Reroute: ".$host{$local.'_reroute'};
+	&takeonline($local);
+    }
+# version
+    if ($host{$local.'_version'}) {
+	print "<br />Version: ".$host{$local.'_version'}
+    }
+# load
+    if (($host{$local.'_load_doomed'}>0.5) || ($mode eq 'load_doomed')) {
+	print "<br />Load: ".$host{$local.'_load'}
+    }
+# users
+    if (($host{$local.'_users_doomed'}>10) || ($mode eq 'users_doomed')) {
+	print "<br />Active Users: ".$host{$local.'_users'}
+    }
+
+# checkrpms
+    if ($host{$local.'_checkrpms'}) {
+	print "<br />RPMs: ".$host{$local.'_checkrpms'}
+    }
+# mysql
+    if ($host{$local.'_mysql'}) {
+	print "<br />MySQL Database: ".$host{$local.'_mysql'}
+    }
+# connections
+    if ($host{$local.'_notconnected'}) {
+	print "<br />Not connected: ";
+	foreach (split(/ /,$host{$local.'_notconnected'})) {
+	    if ($_) {
+		print " <a href='#$_'>$_</a>";
+	    }
+	}
+    }
+# errors
+    if ($host{$local.'_errors'}) {
+	print "<br />loncron errors: ".$host{$local.'_errors'};
+    }
+    print "</td></tr></table><br />";
+}
+
+# =========================================================== Doomedness sorted
+
+sub doomedness {
+    my $crit=shift;
+    my %alldoomed=();
+    my @allhosts=();
+    foreach (keys %host) {
+	if ($_=~/^(\w+)\_$crit$/) {
+	    if ($host{$_}) {
+		push (@allhosts,$1);
+		$alldoomed{$1}=$host{$_};
+	    }
+	}
+    }
+    return sort { $alldoomed{$b} <=> $alldoomed{$a} } @allhosts;
+}
 
+sub resetvars {
+   $maxusers=0;
+   $maxload=0;
+   $totalusers=0;
+   $stat_total=0;
+   $stat_notyet=0;
+   $stat_fromcache=0;
+   $concount=0;
+   undef %host;
+   %host=();
+}
+
+sub mainloop {
+    &resetvars();
 # ==================================================== Main Loop over all Hosts
 
-foreach $local (sort keys %hostname) {
+foreach my $local (sort keys %hostname) {
+    $host{$local.'_unresponsive_doomed'}=0;
 # -- Check general status
     &statuslist($local,'General');
     my %loncron=&replyhash($local,'/lon-status/loncron_simple.txt',1200);
     if (defined($loncron{'local_error'})) {
 	$host{$local.'_loncron'}='Could not determine.';
+	$host{$local.'_unresponsive_doomed'}++;
     } else {
 	if ((time-$loncron{'time'})>$oneday) {
 	    $host{$local.'_loncron'}='Stale.';
+	    $host{$local.'_unresponsive_doomed'}++;
 	} else {
+	    $host{$local.'_loncron_doomed'}=$loncron{'notices'}
+	                                 +4*$loncron{'warnings'}
+	                               +100*$loncron{'errors'};
+	    $host{$local.'_errors'}=$loncron{'errors'};
 	}
     }
+# -- Check version
+    &statuslist($local,'Version');
+    my $version=&request($local,'/lon-status/version.txt',7200);
+    if ($version eq 'local_error') {
+	$host{$local.'_version'}='Could not determine.';
+	$host{$local.'_unresponsive_doomed'}++;
+    } else {
+	$host{$local.'_version'}=$version;
+    }
 # -- Check user status
     &statuslist($local,'Users');
     my %userstatus=&replyhash($local,'/cgi-bin/userstatus.pl?simple',600);
     if (defined($userstatus{'local_error'})) {
 	$host{$local.'_userstatus'}='Could not determine.';
+	$host{$local.'_unresponsive_doomed'}++;
     } else {
+	$host{$local.'_users_doomed'}=$userstatus{'Active'};
+	$host{$local.'_users'}=$userstatus{'Active'};
+	unless ($host{$local.'_users'}) { $host{$local.'_users'}=0; }
+	if ($host{$local.'_users'}>$maxusers) { 
+	    $maxusers=$host{$local.'_users'};
+	}
+	$totalusers+=$host{$local.'_users'};
+	my ($sload,$mload,$lload)=split(/ /,$userstatus{'loadavg'});
+	$host{$local.'_load_doomed'}=$mload;
+	if ($mload>$maxload) { 
+	    $maxload=$mload;
+	}
+	$host{$local.'_load'}=$userstatus{'loadavg'};
+    }
+# -- Check reroute status
+    &statuslist($local,'Reroute');
+    my %reroute=&replyhash($local,'/lon-status/reroute.txt',1800);
+    if ($reroute{'status'} eq 'rerouting') {
+	if ($reroute{'server'}) {
+	    $host{$local.'_reroute'}=
+		'Rerouting to <tt>'.$reroute{'server'}.
+                   '</tt>, domain: '.$reroute{'domain'}.
+		 ' (since '.localtime($reroute{'time'}).')';
+	} else {
+	    $host{$local.'_reroute'}='offline';
+	}
     }
 # -- Check mysql status
     &statuslist($local,'Database');
-    my %mysql=&replyhash($local,'/lon-status/mysql.txt',1200);
+    my %mysql=&replyhash($local,'/lon-status/mysql.txt',3600);
     if (defined($mysql{'local_error'})) {
 	$host{$local.'_mysql'}='Could not determine.';
+	$host{$local.'_unresponsive_doomed'}++;
     } else {
 	if ((time-$mysql{'time'})>(7*$oneday)) {
 	    if ($hostrole{$local} eq 'library') {
@@ -246,13 +439,15 @@ foreach $local (sort keys %hostname) {
     }
 # -- Check rpm status
     &statuslist($local,'RPMs');
-    my %checkrpms=&replyhash($local,'/lon-status/checkrpms.txt',2400);
+    my %checkrpms=&replyhash($local,'/lon-status/checkrpms.txt',7200);
     if (defined($checkrpms{'local_error'})) {
 	$host{$local.'_checkrpms'}='Could not determine.';
+	$host{$local.'_unresponsive_doomed'}++;
     } else {
 	if ((time-$checkrpms{'time'})>(4*$oneday)) {
 	    $host{$local.'_checkrpms'}='Stale.';
 	    $host{$local.'_checkrpms_doomed'}=50;
+	    $host{$local.'_unresponsive_doomed'}++;
 	} elsif ($checkrpms{'status'} eq 'fail') {
 	    $host{$local.'_checkrpms'}='Could not checked RPMs.';
 	    $host{$local.'_checkrpms_doomed'}=100;
@@ -266,7 +461,7 @@ foreach $local (sort keys %hostname) {
     &statuslist($local,'Connections');
     $host{$local.'_notconnected'}='';
     $host{$local.'_notconnected_doomed'}=0;
-    foreach $remote (sort keys %hostname) {
+    foreach my $remote (sort keys %hostname) {
 	my $status=&connected($local,$remote);
 	$connectionstatus{$local.'_TO_'.$remote}=$status;
 	unless (($status eq 'ok') || ($status eq 'not_yet')) {
@@ -274,18 +469,288 @@ foreach $local (sort keys %hostname) {
 	    $host{$local.'_notconnected_doomed'}++;
 	}
     }
-# Eventually, use doomed count
-    &serverstatus($local);
+# =============================================================== End Main Loop
+}
+
 }
 
-# =============================================================== End Mail Loop
+sub reports {
+# ====================================================================== Output
+    if ($mode=~/\_doomed$/) {
+# Output by doomedness
+	foreach (&doomedness($mode)) {
+	    &serverstatus($_);
+	}
+    } elsif ($mode eq 'connections') {
+	print 
+       "<table cellspacing='3' cellpadding='3' border='0' bgcolor='#225522'>".
+       "<tr><td bgcolor='#225522'>&nbsp;</td>";
+	foreach my $remote (sort keys %hostname) {
+	    print '<td bgcolor="#DDDDBB">'.$remote.'</td>';
+	}
+	print "</tr>\n";
+# connection matrix
+	foreach my $local (sort keys %hostname) {
+	    print '<tr><td bgcolor="#DDDDBB">'.$local.'</td>';
+	    foreach my $remote (sort keys %hostname) {
+		if ($connectionstatus{$local.'_TO_'.$remote} eq 'not_yet') {
+		    my $cellcolor='#FFFFFF';
+		    if ($local eq $remote) { $cellcolor='#DDDDDD'; }
+		    print '<td bgcolor="'.$cellcolor.'"><font color="#555522" size="-2">not yet tested</font></td>';
+		} elsif ($connectionstatus{$local.'_TO_'.$remote} eq 'ok') {
+		    my $cellcolor='#BBDDBB';
+		    if ($local eq $remote) { $cellcolor='#99DD99'; }
+		    print 
+'<td bgcolor="'.$cellcolor.'"><font color="#225522" face="arial"><b>ok</b></td>';
+		} else {
+		    my $cellcolor='#DDCCAA';
+		    if ($connectionstatus{$local.'_TO_'.$remote} eq 'local_error') {
+			if ($local eq $remote) { 
+			    $cellcolor='#DD88AA'; 
+			} else {
+			    $cellcolor='#DDAACC';
+			}
+		    } else {
+			if ($local eq $remote) { $cellcolor='#DDBB77'; }
+		    }
+		    print 
+		  '<td bgcolor="'.$cellcolor.'"><font color="#552222" size="-2">'.
+		  $connectionstatus{$local.'_TO_'.$remote}.'<br />';
+		    &lonc($local); &lond($remote);
+		    print '</td>';
+		}
+	    }
+	    print "</tr>\n";
+	}
+	print "</table>";
+    } elsif ($mode eq 'users') {
+# Users
+	if ($maxusers) {
+	    my $factor=50/$maxusers;
+	    print "<h3>Total active user(s): $totalusers</h3>". 
+       "<table cellspacing='3' cellpadding='3' border='0' bgcolor='#225522'>";
+
+	    foreach my $local (sort keys %hostname) {
+		if (defined($host{$local.'_users'})) {
+		    print 
+'<tr><td bgcolor="#BBDDBB"><font face="arial" color="#225522" size="+1">'.$local.
+			'</font><br /><font size="-2">'.
+			$domaindescription{$hostdom{$local}}.
+		       '</font></td><td bgcolor="#DDDDBB">';
+		    &users($local);
+		    print 
+	      '</td><td bgcolor="#DDDDBB"><font face="arial" color="#225522">'.
+	      $host{$local.'_users'}.'</font></td><td bgcolor="#DDDDBB"';
+		    &bar($factor*$host{$local.'_users'});
+		    print "</td></tr>\n";
+		}
+	    }
+	    print "</table>";
+	} else {
+	    print "No active users logged in.";
+	}
+    } elsif ($mode eq 'load') {
+# Load
+	if ($maxload) {
+	    my $factor=50/$maxload; 
+	    print
+       "<table cellspacing='3' cellpadding='3' border='0' bgcolor='#225522'>";
+	    foreach my $local (sort keys %hostname) {
+		if (defined($host{$local.'_load_doomed'})) {
+		    print 
+'<tr><td bgcolor="#BBDDBB"><font face="arial" color="#225522" size="+1">'.
+                        $local.
+			'</font><br /><font size="-2">'.
+			$domaindescription{$hostdom{$local}}.
+		       '</font></td><td bgcolor="#DDDDBB">';
+		    &server($local);
+		    print 
+	      '</td><td bgcolor="#DDDDBB"><font face="arial" color="#225522">'.
+	      $host{$local.'_load_doomed'}.'</font></td><td bgcolor="#DDDDBB"';
+		    &bar($factor*$host{$local.'_load_doomed'});
+		    print "</td></tr>\n";
+		}
+	    }
+	    print "</table>";
+	} else {
+	    print "No workload.";
+	}
+    } elsif ($mode eq 'trouble') {
+	my $count=0;
+	foreach my $local (sort keys %hostname) {
+	    my $trouble='';
+	    if ($host{$local.'_unresponsive_doomed'}>3) {
+		$trouble='Does not respond to several queries.<br />';
+	    }
+	    if ($host{$local.'_errors'}) {
+		$trouble='Has loncron errors.<br />';
+	    } elsif ($host{$local.'_loncron_doomed'}>600) {
+		$trouble='High loncron count.<br />';
+	    }
+	    if ($host{$local.'_load_doomed'}>5) {
+		$trouble='High load.<br />';
+	    }
+	    if ($host{$local.'_users_doomed'}>200) {
+		$trouble='High user volume.<br />';
+	    }
+	    if ($host{$local.'_mysql_doomed'}>1) {
+		$trouble='MySQL database apparently offline.<br />';
+	    }
+	    if ($host{$local.'_checkrpms_doomed'}>100) {
+		$trouble='RPMs outdated.<br />';
+	    }
+	    if ($host{$local.'_reroute'}) {
+		$trouble='Re-Routing<br >';
+	    }
+	    if ($trouble) { $count++; &serverstatus($local,$trouble); }
+	}
+	unless ($count) { print "No mayor trouble."; }
+    }
+}
+
+# ====================================================================== Status
+sub statuslist {
+    my ($local,$what)=@_;
+    print 
+"<script>document.prgstat.progress.value='Testing $local ($hostname{$local}): $what';</script>\n";
+}
+
+# =============================================================================
+# =============================================================================
+# Main program
+#
+# ========================================================= Get form parameters
+my $buffer;
+
+read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});
+my @pairs=split(/&/,$buffer);
+my $pair; my $name; my $value;
+undef %FORM;
+%FORM=();
+foreach $pair (@pairs) {
+    ($name,$value) = split(/=/,$pair);
+    $value =~ tr/+/ /;
+    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+    $FORM{$name}=$value;
+} 
+
+$buffer=$ENV{'QUERY_STRING'};
+@pairs=split(/&/,$buffer);
+foreach $pair (@pairs) {
+    ($name,$value) = split(/=/,$pair);
+    $value =~ tr/+/ /;
+    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+    $FORM{$name}=$value;
+} 
+
+# ====================================================== Determine refresh rate
+
+my $refresh=(($FORM{'refresh'}=~/^\d+$/)?$FORM{'refresh'}:30);
+if ($refresh<30) { $refresh=30; }
+my $starttime=time;
+
+# ============================================================== Determine mode
+
+my %modes=('trouble' => 'Trouble',
+	   'users_doomed' => 'Doomed: Users',
+	   'loncron_doomed' => 'Doomed: General (loncron)',
+	   'mysql_doomed' => 'Doomed: Database (mysql)',
+	   'notconnected_doomed' => 'Doomed: Connections',
+	   'checkrpms_doomed' => 'Doomed: RPMs',
+	   'load_doomed' => 'Doomed: Load',
+	   'unresponsive_doomed' => 'Doomed: Status could not be determined',
+	   'users' => 'User Report',
+	   'load' => 'Load Report',
+	   'connections' => 'Connections Matrix');
+
+$mode=$FORM{'mode'};
+unless ($modes{$mode}) { $mode='trouble'; }
+# ================================================================ Send Headers
+print "Content-type: text/html\n\n".
+    "<html><body bgcolor='#FFFFFF'>\n";
+# -------------------- Read loncapa.conf (and by default, loncapa_apache.conf).
+my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
+%perlvar=%{$perlvarref};
+undef $perlvarref; # remove since sensitive and not needed
+delete $perlvar{'lonReceipt'}; # remove since sensitive and not needed
+delete $perlvar{'lonSqlAccess'}; # remove since sensitive and not needed
+
+# ------------------------------------------------------------- Read hosts file
+{
+    my $config=IO::File->new("$perlvar{'lonTabDir'}/hosts.tab");
+
+    while (my $configline=<$config>) {
+       $configline=~s/#.*$//;
+       unless ($configline=~/\w/) { next; } 
+       my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
+       $hostname{$id}=$name;
+       $hostdom{$id}=$domain;
+       $hostrole{$id}=$role;
+       $hostip{$id}=$ip;
+       if (($role eq 'library') && ($id ne $perlvar{'lonHostID'})) {
+	   $libserv{$id}=$name;
+       }
+    }
+}
+# ------------------------------------------------------------ Read domain file
+{
+    my $fh=IO::File->new($perlvar{'lonTabDir'}.'/domain.tab');
+    if ($fh) {
+       while (<$fh>) {
+           next if (/^(\#|\s*$)/);
+           chomp;
+           my ($domain, $domain_description, $def_auth, $def_auth_arg,
+	       $def_lang, $city, $longi, $lati) = split(/:/,$_);
+	   $domain_auth_def{$domain}=$def_auth;
+           $domain_auth_arg_def{$domain}=$def_auth_arg;
+	   $domaindescription{$domain}=$domain_description;
+	   $domain_lang_def{$domain}=$def_lang;
+	   $domain_city{$domain}=$city;
+	   $domain_longi{$domain}=$longi;
+	   $domain_lati{$domain}=$lati;
+       }
+    }
+}
+
+print "<img src='/adm/lonIcons/lonlogos.gif' align='right' /><h1>LON-CAPA Cluster Status ".localtime()."</h1>";
+print "<form name='prgstat'>\n".
+"<input type='text' name='progress' value='Starting ...' size='100' /><br />".
+"</form>\n";;
+print "<form name='status' method='post'>\n";
+print 'Choose next report: '.&select_form($mode,'mode',%modes).'<hr />';
+&hidden('refresh',$refresh);
+
+    if (!$FORM{'runonetime'}) {
+	print 
+   "<h3>Gathering initial cluster data</h3>This may take some time ...<br />";
+	$fromcache=0;
+	&mainloop();
+	&statuslist('Done initial run.');
+	&reports();
+    } else {
+	$fromcache=1;
+	&mainloop();
+	&statuslist('Done gathering cached data');
+	&reports();
+	$fromcache=0;
+	&mainloop();
+    }
+    &hidden('runonetime',1);
+print '<tt><br />Total number of queries: '.$stat_total.
+          '<br />Percent complete: '.
+	  int(($stat_total-$stat_notyet)/$stat_total*100.).
+	  '<br />Percent from cache: '.
+          int($stat_fromcache/$stat_total*100.).'</tt>';
+
+# ============================================================== Close, refresh
 print "</form><script>";
-$runtime=time-$starttime;
-if ($runtime>=$refresh) {
-    print 'document.status.submit();';
+my $runtime=time-$starttime;
+if (($refresh-$runtime)<0) {
+    print "document.status.submit();";
 } else {
-    $refreshtime=int(1000*($refresh-$runtime));
-    print "setTimeout('document.status.submit()',$refreshtime);";
+    my $refreshtime=int(1000*($refresh-$runtime));
+    print "setTimeout('document.status.submit()',$refreshtime);\n".
+          "document.prgstat.progress.value='Will automatically refresh ($refresh secs refresh cycle)'";
 }
 print "</script></body></html>";
 exit 0;