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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 1.17 by pjm2, Tue Feb 27 19:14:26 2001 UTC vs.
Revision 1.48 by tdb, Sat May 11 17:20:07 2002 UTC

# Line 5 | Line 5
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
9 < # methods as you see fit.
10 < #  - pjm2@ukc.ac.uk
8 > # a typical Unix/Linux box.
9   #
10   # $Author$
11   # $Id$
# Line 33 | Line 31 | use vars qw (
31               $filter_addr
32               $file_list
33               $fqdn
34 +             $pidfile
35 +             $retry_wait
36 +             $ostype
37 +             $key
38 +             @data
39              );
40  
41   if (@ARGV != 2) {
# Line 43 | Line 46 | $filter_manager_addr = $ARGV[0];
46   $filter_manager_port = $ARGV[1];
47  
48   $seq_no = 1;
49 + $retry_wait = 60;
50  
51 + # work out our platform, if we can.
52 + $ostype = `uname -s`;
53 + chomp $ostype;
54 + $ostype = "unknown" if not defined $ostype;
55 +
56 + # write our PID to a file
57 + # use home dir by default
58 + #$pidfile = $ENV{"HOME"};
59 + # or drop it in /var/tmp if we can't find HOME
60 + $pidfile = "/var/tmp" if not defined $pidfile;
61 + $pidfile .= "/.ihost.pid";
62 + &write_pid();
63 +
64   &tcp_configure();
65 + &send_tcp_heartbeat();
66   &send_udp_packet();
67  
68   $last_udp_time = time;
# Line 68 | Line 86 | while (1) {
86      else {
87          $delay = $next_tcp;
88      }
89 <    `sleep $delay`;
89 >    sleep $delay;
90   }
91  
92 + # we'll probably never get here...
93 + `rm -f $pidfile`;
94   exit(0);
95  
96  
97   #-----------------------------------------------------------------------
98 + # wait_then_retry
99 + # Waits for the period of time specified in $retry_wait, then attempts
100 + # to reconfigure with the server.
101 + #-----------------------------------------------------------------------
102 + sub wait_then_retry() {
103 +    print "Will retry configuration with filter manager in $retry_wait seconds.\n";
104 +    sleep $retry_wait;
105 + }
106 +
107 +
108 + #-----------------------------------------------------------------------
109   # tcp_configure
110   # Establishes a TCP connection to the specified i-scream filter manager.
111   # The host then requests details from the server, such as the intervals
# Line 82 | Line 113 | exit(0);
113   #-----------------------------------------------------------------------
114   sub tcp_configure() {
115      
116 <    my($sock) = new IO::Socket::INET(
117 <                                     PeerAddr => $filter_manager_addr,
118 <                                     PeerPort => $filter_manager_port,
119 <                                     Proto => 'tcp'
120 <                                    );
121 <    if (!defined $sock) {
122 <        print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
123 <        print "Please check that there is an i-scream server at this address.\n";
124 <        print "Program ended.\n";
125 <        exit(1);
126 <    }
116 >    while (1) {
117 >        my($sock) = new IO::Socket::INET(
118 >                                         PeerAddr => $filter_manager_addr,
119 >                                         PeerPort => $filter_manager_port,
120 >                                         Proto => 'tcp'
121 >                                        ) or die "Cannot connect!";
122 >        if (!defined $sock) {
123 >            print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
124 >            print "Please check that there is an i-scream server at this address.\n";
125 >            wait_then_retry();
126 >            next;
127 >        }
128  
129 <    # Now run through the configuration process...
130 <    my($response);
129 >        # Now run through the configuration process...
130 >        my($response);
131      
132 <    print $sock "STARTCONFIG\n";
133 <    $response = <$sock>;
134 <    if (!chop $response eq "OK") {
135 <        print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
136 <        exit(1);
137 <    }
132 >        print $sock "STARTCONFIG\n";
133 >        $response = <$sock>;
134 >        if ($response && !($response eq "OK\n")) {
135 >            print "The i-scream server rejected the STARTCONFIG command.\n";
136 >            close($sock);
137 >            wait_then_retry();
138 >            next;
139 >        }
140  
141 <    print "Config started okay.\n";
141 >        print "Config started okay.\n";
142      
143 <    print $sock "LASTMODIFIED\n";
144 <    $response = <$sock>;
145 <    chop $response;
146 <    $last_modified = $response;
143 >        print $sock "LASTMODIFIED\n";
144 >        $response = <$sock>;
145 >        if (!$response || $response eq "ERROR\n") {
146 >            print "The i-scream server did not provide the LASTMODIFIED value.\n";
147 >            close($sock);
148 >            wait_then_retry();
149 >            next;
150 >        }
151 >        chomp $response;
152 >        $last_modified = $response;
153      
154 <    print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
154 >        print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
155  
156 <    print $sock "FILELIST\n";
157 <    $response = <$sock>;
158 <    chop $response;
159 <    $file_list = $response;
156 >        print $sock "FILELIST\n";
157 >        $response = <$sock>;
158 >        if (!$response || $response eq "ERROR\n") {
159 >            print "The i-scream server did not provide a configuration file list.\n";
160 >            close($sock);
161 >            wait_then_retry();
162 >            next;
163 >        }
164 >        chomp $response;
165 >        $file_list = $response;
166  
167 <    print "File list obtained: $file_list\n";
167 >        print "File list obtained: $file_list\n";
168  
169 <    print $sock "FQDN\n";
170 <    $response = <$sock>;
171 <    chop $response;
172 <    $fqdn = $response;
169 >        print $sock "FQDN\n";
170 >        $response = <$sock>;
171 >        if (!$response || $response eq "ERROR\n") {
172 >            print "The i-scream server did not tell us our FQDN.\n";
173 >            close($sock);
174 >            wait_then_retry();
175 >            next;
176 >        }
177 >        chomp $response;
178 >        $fqdn = $response;
179  
180 <    print "FQDN returned: $fqdn\n";
180 >        print "FQDN returned: $fqdn\n";
181  
182 <    print $sock "UDPUpdateTime\n";
183 <    $response = <$sock>;
184 <    chop $response;
185 <    $udp_update_time = $response;
182 >        print $sock "UDPUpdateTime\n";
183 >        $response = <$sock>;
184 >        if (!$response || $response eq "ERROR\n") {
185 >            print "The i-scream server did not give us a UDPUpdateTime.\n";
186 >            close($sock);
187 >            wait_then_retry();
188 >            next;
189 >        }
190 >        chomp $response;
191 >        $udp_update_time = $response;
192  
193 <    print $sock "TCPUpdateTime\n";
194 <    $response = <$sock>;
195 <    chop $response;
196 <    $tcp_update_time = $response;
193 >        print $sock "TCPUpdateTime\n";
194 >        $response = <$sock>;
195 >        if (!$response || $response eq "ERROR\n") {
196 >            print "The i-scream server did not give us a TCPUpdateTime.\n";
197 >            close($sock);
198 >            wait_then_retry();
199 >            next;
200 >        }
201 >        chomp $response;
202 >        $tcp_update_time = $response;
203      
204 <    print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
204 >        print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
205  
206 <    print $sock "ENDCONFIG\n";
207 <    $response = <$sock>;
208 <    chomp $response;
209 <    if (!$response eq "OK") {
210 <        print "ENDCONFIG command to server failed.  Terminated.\n";
211 <        exit(1);
212 <    }
206 >        print $sock "ENDCONFIG\n";
207 >        $response = <$sock>;
208 >        if ($response && !($response eq "OK\n")) {
209 >            print "ENDCONFIG command to server failed.  Terminated.\n";
210 >            close($sock);
211 >            wait_then_retry();
212 >            next;
213 >        }
214  
215 <    print "Config ended.\n";
215 >        print "Config ended.\n";
216      
217 <    print $sock "FILTER\n";
218 <    $response = <$sock>;
219 <    chop $response;
220 <    $response =~ /(.*);(.*);(.*)/;
221 <    ($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
217 >        print $sock "FILTER\n";
218 >        $response = <$sock>;
219 >        if (!$response) {
220 >            print "Failed: Could not get a filter address from the filter manager.\n";
221 >            close($sock);
222 >            wait_then_retry();
223 >            next;
224 >        }
225 >        chomp $response;
226 >        if ($response eq "ERROR") {
227 >            print "There are no active configured filters for your host.\n";
228 >            close($sock);
229 >            wait_then_retry();
230 >            next;
231 >        }
232 >        $response =~ /^(.*);(.*);(.*)/;
233 >        ($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
234 >        unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
235 >            print "Failed: Filter address response from server did not make sense: $response\n";
236 >            close($sock);
237 >            wait_then_retry();
238 >            next;
239 >        }
240      
241 <    print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
241 >        print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
242  
243 <    print $sock "END\n";
244 <    $response = <$sock>;
245 <    chop $response;
246 <    if ($response eq "OK") {
247 <        print "Host successfully configured via TCP.\n"
248 <    }
249 <    else {
250 <        print "The server failed the host configuration on the END command.";
251 <        exit(1);
252 <    }
243 >        print $sock "END\n";
244 >        $response = <$sock>;
245 >        if ($response && ($response eq "OK\n")) {
246 >            print "Host successfully configured via TCP.\n"
247 >        }
248 >        else {
249 >            print "The server failed the host configuration on the END command.\n";
250 >            close($sock);
251 >            wait_then_retry();
252 >            next;
253 >        }
254      
255 <    close($sock);
255 >        close($sock);
256  
257 <    print "Configuration finished sucessfully!\n";
258 <    
257 >        print "Configuration finished sucessfully!\n";
258 >        last;
259 >    }
260      return;
261   }
262  
263  
179
180
264   #-----------------------------------------------------------------------
265   # send_udp_packet
266   # Sends a UDP packet to an i-scream filter.
# Line 186 | Line 269 | sub tcp_configure() {
269   #-----------------------------------------------------------------------
270   sub send_udp_packet() {
271  
272 <    my(@statgrab) = `./statgrab.pl`;
273 <    my(%packet);
274 <    for (my($i) = 0; $i <= $#statgrab; $i++) {
275 <        $statgrab[$i] =~ /^([^\s]*) (.*)$/;
276 <        $packet{$1} = $2;
272 >    my($plugins_dir) = "plugins";
273 >    
274 >    opendir PLUGINS, $plugins_dir;
275 >    my(@plugins) = readdir PLUGINS;
276 >    foreach my $plugin (@plugins) {
277 >        push @data, `$plugins_dir/$plugin $ostype` if -x "$plugins_dir/$plugin" && -f "$plugins_dir/$plugin";
278      }
279      
280 +    # get some extra data
281      my($date) = time;
282 +    my($ip);
283 +    $ip = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost') or $ip = 'localhost';
284      
285 <    my($disk_info) = "<disk>";
286 <    my($i) = 0;
287 <    while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
288 <        $disk_info .= "<p$i";
289 <        $disk_info .= " name=\"" . $packet{"packet.disk.p$i.attributes.name"} . "\"";
290 <        $disk_info .= " kbytes=\"" . $packet{"packet.disk.p$i.attributes.kbytes"} . "\"";
291 <        $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();
213 <    $hostname =~ s/\..*$//g;
214 <    my($resolv) = `cat /etc/resolv.conf`;
215 <    my($domainname);
216 <    my($machine_name);
217 <    if($resolv =~ /domain\s+([^\s]+)/) {
218 <        # some machines have domain <domain> in resolv.conf
219 <        $domainname = $1;
220 <        $machine_name = "$hostname.$domainname";
221 <    }
222 <    elsif($resolv =~ /search\s+([^\s]+)/) {
223 <        # some machines have search <domain> in resolv.conf
224 <        $domainname = $1;
225 <        $machine_name = "$hostname.$domainname";
226 <    }
227 <    else {
228 <        # we can't find out the domain
229 <        $machine_name = $hostname;
230 <    }
231 <    my($ip) = inet_ntoa(scalar(gethostbyname($hostname)) || 'localhost');
232 <
233 <    # Build the XML packet this way, as we can clearly
234 <    # see the structure and contents... I like this ;-)
235 <    # [Note that the server rejects UDP packets that are
236 <    # larger than 8196 bytes]
237 <    my($xml) = <<EOF;
285 >    # add some extra data to the array
286 >    push(@data, "packet.attributes.seq_no $seq_no");
287 >    push(@data, "packet.attributes.machine_name $fqdn");
288 >    push(@data, "packet.attributes.date $date");
289 >    push(@data, "packet.attributes.type data");
290 >    push(@data, "packet.attributes.ip $ip");
291 >    push(@data, "packet.attributes.key $key");
292      
293 < <packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
294 <    <load>
241 <        <load1>$packet{"packet.load.load1"}</load1>
242 <        <load5>$packet{"packet.load.load5"}</load5>
243 <        <load15>$packet{"packet.load.load15"}</load15>
244 <    </load>
245 <    <os>
246 <        <name>$packet{"packet.os.name"}</name>
247 <        <release>$packet{"packet.os.release"}</release>
248 <        <platform>$packet{"packet.os.platform"}</platform>
249 <        <sysname>$packet{"packet.os.sysname"}</sysname>
250 <        <version>$packet{"packet.os.version"}</version>
251 <        <uptime>$packet{"packet.os.uptime"}</uptime>
252 <    </os>
253 <    <users>
254 <        <count>$packet{"packet.users.count"}</count>
255 <        <list>$packet{"packet.users.list"}</list>
256 <    </users>
257 <    <processes>
258 <        <total>$packet{"packet.processes.total"}</total>
259 <        <sleeping>$packet{"packet.processes.sleeping"}</sleeping>
260 <        <zombie>$packet{"packet.processes.zombie"}</zombie>
261 <        <stopped>$packet{"packet.processes.stopped"}</stopped>
262 <        <cpu>$packet{"packet.processes.cpu"}</cpu>
263 <    </processes>
264 <    <cpu>
265 <        <idle>$packet{"packet.cpu.idle"}</idle>
266 <        <user>$packet{"packet.cpu.user"}</user>
267 <        <kernel>$packet{"packet.cpu.kernel"}</kernel>
268 <        <iowait>$packet{"packet.cpu.iowait"}</iowait>
269 <        <swap>$packet{"packet.cpu.swap"}</swap>
270 <    </cpu>
271 <    <memory>
272 <        <total>$packet{"packet.memory.total"}</total>
273 <        <free>$packet{"packet.memory.free"}</free>
274 <    </memory>
275 <    <swap>
276 <        <total>$packet{"packet.swap.total"}</total>
277 <        <free>$packet{"packet.swap.free"}</free>
278 <    </swap>
279 <    $disk_info
280 < </packet>
293 >    # sort the data
294 >    @data = sort(grep(!/^$/, grep(/^packet\./, @data)));
295  
296 < EOF
296 >    # turn the array into some nice XML
297 >    my($xml) = &make_xml("", "");
298  
284    # Make the packet smaller by stripping out newlines and leading spaces.
285    $xml =~ s/\n\s*//g;
286    
299      my($sock) = new IO::Socket::INET (
300                                        PeerPort => $udp_port,
301                                        PeerAddr => $filter_addr,
302                                        Proto => 'udp'
303 <                                     ) or die "Socket: $!\n";
304 <
303 >                                     ) or die "Could not send UDP: $!\n";
304 >    
305      print $sock $xml or die "Could not send UDP packet: $!\n";
306      close($sock);
307      $seq_no++;
# Line 299 | Line 311 | EOF
311   }
312  
313  
302
303
314   #-----------------------------------------------------------------------
315   # send_tcp_heartbeat
316   # Establishes a TCP connection to an i-scream filter.
317   # The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
318 + # If we need to reconfigure, then we complete the heartbeat before
319 + # doing so.
320   #-----------------------------------------------------------------------
321   sub send_tcp_heartbeat() {
322  
323 +    my ($doReconfigure) = 0;
324 +
325      my($sock) = new IO::Socket::INET(
326                                       PeerAddr => $filter_addr,
327                                       PeerPort => $tcp_port,
328                                       Proto => 'tcp'
329 <                                    );
329 >                                    ) or return;
330      if (!defined $sock) {
331          print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
332 +        &tcp_configure();
333          return;
334      }
335  
# Line 323 | Line 338 | sub send_tcp_heartbeat() {
338  
339      print $sock "HEARTBEAT\n";
340      $response = <$sock>;
341 <    chop $response;
327 <    if (!$response eq "OK") {
341 >    if (!$response eq "OK\n") {
342          close($sock);
343          print "Server gave wrong response to HEARTBEAT: $response\n";
344 +        &tcp_configure();
345          return;
346      }
347      
348      print $sock "CONFIG\n";
349      $response = <$sock>;
350 <    chop $response;
336 <    if (!$response eq "OK") {
350 >    if (!$response eq "OK\n") {
351          close($sock);
352          print "Server gave wrong response to CONFIG: $response\n";
353 +        &tcp_configure();
354          return;
355      }
356  
357      print $sock "$file_list\n";
358      $response = <$sock>;
359 <    chop $response;
345 <    if (!$response eq "OK") {
359 >    if (!$response eq "OK\n") {
360          close($sock);
361          print "Server gave wrong response to file list: $response\n";
362 +        &tcp_configure();
363          return;
364      }
365      
366      print $sock "$last_modified\n";
367      $response = <$sock>;
368 <    chop $response;
354 <    if ($response eq "ERROR") {
368 >    if ($response eq "ERROR\n") {
369          close($sock);
370 <        &tcp_configure();
371 <        return;
370 >        print "Server configuration changed.  Reconfiguring with filter manager.\n";
371 >        $doReconfigure = 1;
372      }
373 <    if (!$response eq "OK") {
373 >    if (!$response eq "OK\n") {
374          close($sock);
375          print "Server gave wrong response to HEARTBEAT: $response\n";
376 +        &tcp_configure();
377          return;
378      }
379      
380 +    print $sock "KEY\n";
381 +    $key = <$sock>;
382 +    
383      print $sock "ENDHEARTBEAT\n";
384      $response = <$sock>;
385 <    chop $response;
368 <    if (!$response eq "OK") {
385 >    if (!$response eq "OK\n") {
386          close($sock);
387          print "Server gave wrong response to ENDHEARTBEAT: $response\n";
388 +        &tcp_configure();
389          return;
390      }
391      
392      close($sock);
393      print "^";
394      
395 +    &tcp_configure() if $doReconfigure;
396 +    
397      return;
398 + }
399 +
400 +
401 + #-----------------------------------------------------------------------
402 + # write_pid
403 + # Writes the PID (process ID) of this instance to $pidfile.
404 + # This is then used by a seperate script to check (and restart) ihost.
405 + #-----------------------------------------------------------------------
406 + sub write_pid() {
407 +    open PID, ">$pidfile";
408 +    print PID $$;
409 +    close PID;
410 +    
411 +    return;
412 + }
413 +
414 + #-----------------------------------------------------------------------
415 + # make_xml
416 + # Turns an array of plugins data into an XML string.
417 + #-----------------------------------------------------------------------
418 + sub make_xml() {
419 +    my($curlevel, $curline) = @_;
420 +    my($xmltemp) = ""; my($curtag) = ""; my($attributes) = "";
421 +    while(1) {
422 +        $curline = shift(@data) if $curline eq "";
423 +        return $xmltemp if not defined $curline;
424 +        chomp $curline;
425 +        # dealing with nest (or attributes)
426 +        if($curline =~ /^$curlevel([^\.\s]+\.)/) {
427 +            $curtag=$1;
428 +            if($curline =~ /^$curlevel$curtag([^\.\s]+)\s+(.*)$/) {
429 +                $xmltemp .= &make_xml("$curlevel$curtag", $curline);
430 +            }
431 +            elsif($curline =~ /^$curlevel$curtag(attributes)\.([^\.\s]+)\s+(.*)$/) {
432 +                $attributes .= " $2=\"$3\"";
433 +            }
434 +            else {
435 +                $xmltemp .= &make_xml("$curlevel$curtag", $curline);
436 +            }
437 +            my($nextline) = $data[0]; chomp $nextline if defined $nextline;
438 +            $curtag =~ s/(.*)\./$1/;
439 +            if((defined $nextline) && ($nextline =~ /^$curlevel$curtag\./)) {
440 +                $curline = "";
441 +            }
442 +            else {
443 +                $xmltemp = "<$curtag$attributes>$xmltemp</$curtag>" unless $curtag eq "";
444 +                return $xmltemp;
445 +            }
446 +        }
447 +        # dealing with value
448 +        elsif($curline =~ /^$curlevel([^\.\s]+)\s+(.*)$/) {
449 +            $curtag=$1;
450 +            $xmltemp=$2;          
451 +            my($nextline) = $data[0]; chomp $nextline if defined $nextline;
452 +            if(defined $nextline && ($nextline =~ /^$curlevel$curtag\./ || $nextline =~ /^$curlevel$curtag\s+/)) {
453 +                $curline = "";
454 +            }
455 +            else {
456 +                $xmltemp = "<$curtag$attributes>$xmltemp</$curtag>" unless $curtag eq "";
457 +                return $xmltemp;
458 +            }
459 +        }
460 +        # dealing with a null value
461 +        elsif($curline =~ /^$curlevel([^\.\s]+)$/) {
462 +            # simply adding a space makes the above elsif deal with it :)
463 +            # just level with an empty tag in the XML
464 +            $curline .= " ";
465 +        }
466 +        # failing all that, skip the line
467 +        else {
468 +            $curline = "";
469 +        }
470 +    }
471   }

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