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root/i-scream/projects/cms/source/host/ihost-perl/ihost.pl
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Comparing projects/cms/source/host/ihost-perl/ihost.pl (file contents):
Revision 1.9 by pjm2, Mon Jan 29 16:51:50 2001 UTC vs.
Revision 1.20 by tdb, Wed Feb 28 10:53:13 2001 UTC

# Line 2 | Line 2
2  
3   # -----------------------------------------------------------
4   # Perl i-scream Host.
5 + # http://www.i-scream.org.uk
6   #
7   # An all-in-one script to act as an i-scream host on
8   # a typical Unix/Linux box.  You may adapt the data-gathering
# Line 31 | Line 32 | use vars qw (
32               $tcp_port
33               $filter_addr
34               $file_list
35 +             $fqdn
36              );
37  
38   if (@ARGV != 2) {
# Line 71 | Line 73 | while (1) {
73  
74   exit(0);
75  
76 +
77 + #-----------------------------------------------------------------------
78 + # tcp_configure
79 + # Establishes a TCP connection to the specified i-scream filter manager.
80 + # The host then requests details from the server, such as the intervals
81 + # at which to send UDP packets.
82 + #-----------------------------------------------------------------------
83   sub tcp_configure() {
84      
85      my($sock) = new IO::Socket::INET(
86                                       PeerAddr => $filter_manager_addr,
87                                       PeerPort => $filter_manager_port,
88                                       Proto => 'tcp'
89 <                                    ) or die "Could not perform configuration via TCP: $!\n";
89 >                                    );
90 >    if (!defined $sock) {
91 >        print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
92 >        print "Please check that there is an i-scream server at this address.\n";
93 >        print "Program ended.\n";
94 >        exit(1);
95 >    }
96  
97 <    die "Could not connect to the i-scream filter manager: $!\n" unless $sock;
83 <
84 <    # Now run through the configuration process.
97 >    # Now run through the configuration process...
98      my($response);
99      
100      print $sock "STARTCONFIG\n";
# Line 107 | Line 120 | sub tcp_configure() {
120  
121      print "File list obtained: $file_list\n";
122  
123 +    print $sock "FQDN\n";
124 +    $response = <$sock>;
125 +    chop $response;
126 +    $fqdn = $response;
127 +
128 +    print "FQDN returned: $fqdn\n";
129 +
130      print $sock "UDPUpdateTime\n";
131      $response = <$sock>;
132      chop $response;
# Line 151 | Line 171 | sub tcp_configure() {
171      close($sock);
172  
173      print "Configuration finished sucessfully!\n";
174 +    
175 +    return;
176   }
177  
178 +
179 +
180 +
181 + #-----------------------------------------------------------------------
182 + # send_udp_packet
183 + # Sends a UDP packet to an i-scream filter.
184 + # The packet contains XML markup describing some of the machine's state.
185 + # Receipt of UDP packets is not guaranteed.
186 + #-----------------------------------------------------------------------
187   sub send_udp_packet() {
188  
189      my(@statgrab) = `./statgrab.pl`;
190      my(%packet);
191 <    for (my($i) = 0; $i < $#statgrab; $i++) {
191 >    for (my($i) = 0; $i <= $#statgrab; $i++) {
192          $statgrab[$i] =~ /^([^\s]*) (.*)$/;
193          $packet{$1} = $2;
194      }
# Line 167 | Line 198 | sub send_udp_packet() {
198      my($disk_info) = "<disk>";
199      my($i) = 0;
200      while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
201 <        $disk_info .= "<p$i>";
202 <        $disk_info .= qq/<name>$packet{"packet.disk.p$i.attributes.name"}<\/name>/;
203 <        $disk_info .= qq/<kbytes>$packet{"packet.disk.p$i.attributes.kbytes"}<\/kbytes>/;
204 <        $disk_info .= qq/<used>$packet{"packet.disk.p$i.attributes.used"}<\/used>/;
205 <        $disk_info .= qq/<avail>$packet{"packet.disk.p$i.attributes.avail"}<\/avail>/;
206 <        $disk_info .= qq/<mount>$packet{"packet.disk.p$i.attributes.mount"}<\/mount>/;
207 <        $disk_info .= "</p$i>";
201 >        $disk_info .= "<p$i";
202 >        $disk_info .= " name=\"" . $packet{"packet.disk.p$i.attributes.name"} . "\"";
203 >        $disk_info .= " kbytes=\"" . $packet{"packet.disk.p$i.attributes.kbytes"} . "\"";
204 >        $disk_info .= " used=\"" . $packet{"packet.disk.p$i.attributes.used"} . "\"";
205 >        $disk_info .= " avail=\"" . $packet{"packet.disk.p$i.attributes.avail"} . "\"";
206 >        $disk_info .= " mount=\"" . $packet{"packet.disk.p$i.attributes.mount"} . "\"";
207 >        $disk_info .= "></p$i>";
208          ++$i;
209      }
210      $disk_info .= "</disk>";
211  
212 <    my($hostname) = hostname();
182 <    $hostname =~ s/\..*$//g;
183 <    `cat /etc/resolv.conf` =~ /domain\s+([^\s]+)/;
184 <    my($domainname) = $1;
185 <    my($machine_name) = "$hostname.$domainname";
186 <    my($ip) = inet_ntoa(scalar(gethostbyname($hostname)) || 'localhost');
212 >    my($ip) = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost');
213  
214      # Build the XML packet this way, as we can clearly
215      # see the structure and contents... I like this ;-)
216 +    # [Note that the server rejects UDP packets that are
217 +    # larger than 8196 bytes]
218      my($xml) = <<EOF;
219      
220 < <packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
220 > <packet seq_no="$seq_no" machine_name="$fqdn" date="$date" type="data" ip="$ip">
221      <load>
222          <load1>$packet{"packet.load.load1"}</load1>
223          <load5>$packet{"packet.load.load5"}</load5>
# Line 201 | Line 229 | sub send_udp_packet() {
229          <platform>$packet{"packet.os.platform"}</platform>
230          <sysname>$packet{"packet.os.sysname"}</sysname>
231          <version>$packet{"packet.os.version"}</version>
232 +        <uptime>$packet{"packet.os.uptime"}</uptime>
233      </os>
234      <users>
235          <count>$packet{"packet.users.count"}</count>
# Line 221 | Line 250 | sub send_udp_packet() {
250          <swap>$packet{"packet.cpu.swap"}</swap>
251      </cpu>
252      <memory>
253 <        <total>$packet{"packet.memory.real"}</total>
253 >        <total>$packet{"packet.memory.total"}</total>
254          <free>$packet{"packet.memory.free"}</free>
255      </memory>
256      <swap>
257 <        <total>$packet{"packet.memory.swap_total"}</total>
258 <        <free>$packet{"packet.memory.swap_free"}</free>
257 >        <total>$packet{"packet.swap.total"}</total>
258 >        <free>$packet{"packet.swap.free"}</free>
259      </swap>
260      $disk_info
261   </packet>
262  
263   EOF
264  
265 +    # Make the packet smaller by stripping out newlines and leading spaces.
266      $xml =~ s/\n\s*//g;
267 <    
267 >
268      my($sock) = new IO::Socket::INET (
269                                        PeerPort => $udp_port,
270                                        PeerAddr => $filter_addr,
# Line 245 | Line 275 | EOF
275      close($sock);
276      $seq_no++;
277      print "-";
278 +    
279 +    return;
280   }
281  
282 +
283 +
284 +
285 + #-----------------------------------------------------------------------
286 + # send_tcp_heartbeat
287 + # Establishes a TCP connection to an i-scream filter.
288 + # The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
289 + #-----------------------------------------------------------------------
290   sub send_tcp_heartbeat() {
291  
292      my($sock) = new IO::Socket::INET(
293                                       PeerAddr => $filter_addr,
294                                       PeerPort => $tcp_port,
295                                       Proto => 'tcp'
296 <                                    ) or die "Could not perform heartbeat via TCP: $!\n";
296 >                                    );
297 >    if (!defined $sock) {
298 >        print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
299 >        return;
300 >    }
301  
258    die "Could not connect to the i-scream filter: $!\n" unless $sock;
259
302      # Now run through the configuration process.
303      my($response);
304  
# Line 312 | Line 354 | sub send_tcp_heartbeat() {
354      
355      close($sock);
356      print "^";
357 +    
358 +    return;
359   }

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