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File:  [LON-CAPA] / loncom / cgi / clusterstatus.pl
Revision 1.6: download - view: text, annotated - select for diffs
Mon Feb 3 18:03:52 2003 UTC (21 years, 4 months ago) by harris41
Branches: MAIN
CVS tags: HEAD
best wishes to all.

    1: #!/usr/bin/perl
    2: $|=1;
    3: # The LearningOnline Network with CAPA
    4: # Cluster Status
    5: # (Versions
    6: # (Running loncron
    7: # 09/06/01 Gerd Kortemeyer)
    8: # 02/18/02,02/19/02 Gerd Kortemeyer)
    9: 
   10: use lib '/home/httpd/lib/perl/';
   11: use LONCAPA::Configuration;
   12: 
   13: use LWP::UserAgent();
   14: use HTTP::Headers;
   15: use IO::File;
   16: use Net::Ping;
   17: 
   18: sub online {
   19:     my $host=shift;
   20:     return 1;
   21: # ping is broken
   22:     my $p=Net::Ping->new("tcp",10);
   23:     my $online=$p->ping("$host");
   24:     $p->close();
   25:     undef ($p);
   26:     return $online;
   27: }
   28: 
   29: sub connected {
   30:     my ($local,$remote)=@_;
   31:     $local=~s/\W//g;
   32:     $remote=~s/\W//g;
   33: 
   34:     unless ($hostname{$local}) { return 'local_unknown'; }
   35:     unless ($hostname{$remote}) { return 'remote_unknown'; }
   36: 
   37:     unless (&online($hostname{$local})) { return 'local_offline'; }
   38: 
   39:     my $ua=new LWP::UserAgent;
   40:     
   41:     my $request=new HTTP::Request('GET',
   42:       "http://".$hostname{$local}.'/cgi-bin/ping.pl?'.$remote);
   43: 
   44:     my $response=$ua->request($request);
   45: 
   46:     unless ($response->is_success) { return 'local_error'; }
   47: 
   48:     my $reply=$response->content;
   49:     $reply=(split("\n",$reply))[0];
   50:     $reply=~s/\W//g;
   51:     if ($reply ne $remote) { return $reply; }
   52:     return 'ok';
   53: }
   54: 
   55:  
   56: print "Content-type: text/html\n\n".
   57:       "<html><body bgcolor=#FFFFFF>\n";
   58: # -------------------- Read loncapa.conf (and by default, loncapa_apache.conf).
   59: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
   60: my %perlvar=%{$perlvarref};
   61: undef $perlvarref; # remove since sensitive and not needed
   62: delete $perlvar{'lonReceipt'}; # remove since sensitive and not needed
   63: delete $perlvar{'lonSqlAccess'}; # remove since sensitive and not needed
   64: 
   65: # ------------------------------------------------------------- Read hosts file
   66: {
   67:     my $config=IO::File->new("$perlvar{'lonTabDir'}/hosts.tab");
   68: 
   69:     $total=0;
   70:     while (my $configline=<$config>) {
   71:        my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
   72:        $hostname{$id}=$name;
   73:        $hostdom{$id}=$domain;
   74:        $hostrole{$id}=$role;
   75:        $hostip{$id}=$ip;
   76:        $total++;
   77:        if (($role eq 'library') && ($id ne $perlvar{'lonHostID'})) {
   78: 	   $libserv{$id}=$name;
   79:        }
   80:     }
   81: }
   82: 
   83: print 
   84: "<h1>Cluster Status</h1>";
   85: print "Please be patient while building cluster status ...<p>\n";
   86: $table='';
   87: 
   88: $table.="<table border=2><tr><th rowspan=2>From (local)</th>".
   89: "<th colspan=$total>To (remote)</th></tr><tr>";
   90: foreach $remote (sort keys %hostname) {
   91:    $table.="<th";
   92:    if ($remote eq $perlvar{'lonHostID'}) {
   93:        $table.=" bgcolor=#CCFFBB";
   94:    } else {
   95:        if ($libserv{$remote}) { $table.=" bgcolor=#FFFF99"; }
   96:    }
   97:    $table.=
   98:  "><a href=http://".$hostname{$remote}."/lon-status/>$remote</a></th>";
   99: }
  100: $table.="</tr>";
  101: foreach $local (sort keys %hostname) {
  102:     print "Checking $local ";
  103:    $table.="<tr><td";
  104:    if ($local eq $perlvar{'lonHostID'}) {
  105:        $table.=" bgcolor=#CCFFBB";
  106:    } else {
  107:        if ($libserv{$local}) { $table.=" bgcolor=#FFFF99"; }
  108:    }
  109:    $table.=
  110:  "><b><a href=http://".$hostname{$local}."/lon-status/>$local</a></b><br>".
  111:      $hostrole{$local}.' '.$hostdom{$local}.'<br>'.
  112:      "<tt><a href=http://".$hostname{$local}."/server-status/>".
  113:       $hostname{$local}."</a></tt><br>".
  114:      "<a href=http://".$hostname{$local}."/cgi-bin/loncron.pl>New Report</a>".
  115:      "</td>";
  116:   if (&online($hostname{$local})) {
  117:    foreach $remote (sort keys %hostname) {
  118:        $status=&connected($local,$remote);
  119:        if ($status eq 'ok') {
  120: 	   $table.="<td";
  121:            if ($libserv{$remote}) {
  122: 	       if ($libserv{$local}) {
  123: 		   $table.=" bgcolor=#FFFF44";
  124:                } else {
  125:                    $table.=" bgcolor=#FFFF99";
  126:                }
  127:            } elsif ($libserv{$local}) {
  128:                $table.=" bgcolor=#FFFF99";
  129:            }
  130:            $table.="><b><font color=#00FF00>OK</font></b></td>";
  131:            print ".";
  132:        } else {
  133:            print "X";
  134:            $table.="<td><b><font color=#FF0000>".$status."</font></b><br>".
  135:      "<a href=http://".$hostname{$local}.
  136: 	 "/lon-status/loncstatus.txt>lonc</a>";
  137:            if (&online($hostname{$remote})) {
  138:               $table.=" <a href=http://".$hostname{$remote}.
  139:       "/lon-status/londstatus.txt>lond</a>".
  140:             "</td>";
  141: 	  } else {
  142:               $table.=' offline';
  143:           }
  144:   
  145:        }
  146:    }
  147:   } else {
  148:       print "offline";
  149:       $table.='<th colspan='.$total.'><font color=#FF0000>Offline</font></th>';
  150:   }
  151:    $table.="</tr>\n";
  152:     print "<br>\n";
  153: }
  154: $table.="</table>";
  155: print $table;
  156: print "</body></html>";
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