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