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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 1.37 by tdb, Mon Nov 19 14:15:14 2001 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 +             @data
37              );
38  
39   if (@ARGV != 2) {
# Line 43 | Line 44 | $filter_manager_addr = $ARGV[0];
44   $filter_manager_port = $ARGV[1];
45  
46   $seq_no = 1;
47 + $retry_wait = 60;
48  
49 + # write our PID to a file
50 + $pidfile = "/var/tmp/ihost.pid";
51 + &write_pid();
52 +
53   &tcp_configure();
54   &send_udp_packet();
55  
# Line 68 | Line 74 | while (1) {
74      else {
75          $delay = $next_tcp;
76      }
77 <    `sleep $delay`;
77 >    sleep $delay;
78   }
79  
80 + # we'll probably never get here...
81 + `rm -f $pidfile`;
82   exit(0);
83  
84  
85   #-----------------------------------------------------------------------
86 + # wait_then_retry
87 + # Waits for the period of time specified in $retry_wait, then attempts
88 + # to reconfigure with the server.
89 + #-----------------------------------------------------------------------
90 + sub wait_then_retry() {
91 +    print "Will retry configuration with filter manager in $retry_wait seconds.\n";
92 +    sleep $retry_wait;
93 + }
94 +
95 +
96 + #-----------------------------------------------------------------------
97   # tcp_configure
98   # Establishes a TCP connection to the specified i-scream filter manager.
99   # The host then requests details from the server, such as the intervals
# Line 82 | Line 101 | exit(0);
101   #-----------------------------------------------------------------------
102   sub tcp_configure() {
103      
104 <    my($sock) = new IO::Socket::INET(
105 <                                     PeerAddr => $filter_manager_addr,
106 <                                     PeerPort => $filter_manager_port,
107 <                                     Proto => 'tcp'
108 <                                    );
109 <    if (!defined $sock) {
110 <        print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
111 <        print "Please check that there is an i-scream server at this address.\n";
112 <        print "Program ended.\n";
113 <        exit(1);
114 <    }
104 >    while (1) {
105 >        my($sock) = new IO::Socket::INET(
106 >                                         PeerAddr => $filter_manager_addr,
107 >                                         PeerPort => $filter_manager_port,
108 >                                         Proto => 'tcp'
109 >                                        ) or die "Cannot connect!";
110 >        if (!defined $sock) {
111 >            print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
112 >            print "Please check that there is an i-scream server at this address.\n";
113 >            wait_then_retry();
114 >            next;
115 >        }
116  
117 <    # Now run through the configuration process...
118 <    my($response);
117 >        # Now run through the configuration process...
118 >        my($response);
119      
120 <    print $sock "STARTCONFIG\n";
121 <    $response = <$sock>;
122 <    if (!chop $response eq "OK") {
123 <        print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
124 <        exit(1);
125 <    }
120 >        print $sock "STARTCONFIG\n";
121 >        $response = <$sock>;
122 >        if ($response && !($response eq "OK\n")) {
123 >            print "The i-scream server rejected the STARTCONFIG command.\n";
124 >            close($sock);
125 >            wait_then_retry();
126 >            next;
127 >        }
128  
129 <    print "Config started okay.\n";
129 >        print "Config started okay.\n";
130      
131 <    print $sock "LASTMODIFIED\n";
132 <    $response = <$sock>;
133 <    chop $response;
134 <    $last_modified = $response;
131 >        print $sock "LASTMODIFIED\n";
132 >        $response = <$sock>;
133 >        if (!$response) {
134 >            print "The i-scream server did not return anything for the LASTMODIFIED command.\n";
135 >            close($sock);
136 >            wait_then_retry();
137 >            next;
138 >        }
139 >        chop $response;
140 >        $last_modified = $response;
141      
142 <    print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
142 >        print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
143  
144 <    print $sock "FILELIST\n";
145 <    $response = <$sock>;
146 <    chop $response;
147 <    $file_list = $response;
144 >        print $sock "FILELIST\n";
145 >        $response = <$sock>;
146 >        if (!$response) {
147 >            print "The i-scream server did not provide a configuration file list.\n";
148 >            close($sock);
149 >            wait_then_retry();
150 >            next;
151 >        }
152 >        chop $response;
153 >        $file_list = $response;
154  
155 <    print "File list obtained: $file_list\n";
155 >        print "File list obtained: $file_list\n";
156  
157 <    print $sock "FQDN\n";
158 <    $response = <$sock>;
159 <    chop $response;
160 <    $fqdn = $response;
157 >        print $sock "FQDN\n";
158 >        $response = <$sock>;
159 >        if (!$response) {
160 >            print "The i-scream server did not tell us our FQDN.\n";
161 >            close($sock);
162 >            wait_then_retry();
163 >            next;
164 >        }
165 >        chop $response;
166 >        $fqdn = $response;
167  
168 <    print "FQDN returned: $fqdn\n";
168 >        print "FQDN returned: $fqdn\n";
169  
170 <    print $sock "UDPUpdateTime\n";
171 <    $response = <$sock>;
172 <    chop $response;
173 <    $udp_update_time = $response;
170 >        print $sock "UDPUpdateTime\n";
171 >        $response = <$sock>;
172 >        if (!$response) {
173 >            print "The i-scream server did not give us a UDPUpdateTime.\n";
174 >            close($sock);
175 >            wait_then_retry();
176 >            next;
177 >        }
178 >        chop $response;
179 >        $udp_update_time = $response;
180  
181 <    print $sock "TCPUpdateTime\n";
182 <    $response = <$sock>;
183 <    chop $response;
184 <    $tcp_update_time = $response;
181 >        print $sock "TCPUpdateTime\n";
182 >        $response = <$sock>;
183 >        if (!$response) {
184 >            print "The i-scream server did not give us a TCPUpdateTime.\n";
185 >            close($sock);
186 >            wait_then_retry();
187 >            next;
188 >        }
189 >        chop $response;
190 >        $tcp_update_time = $response;
191      
192 <    print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
192 >        print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
193  
194 <    print $sock "ENDCONFIG\n";
195 <    $response = <$sock>;
196 <    chomp $response;
197 <    if (!$response eq "OK") {
198 <        print "ENDCONFIG command to server failed.  Terminated.\n";
199 <        exit(1);
200 <    }
194 >        print $sock "ENDCONFIG\n";
195 >        $response = <$sock>;
196 >        if ($response && !($response eq "OK\n")) {
197 >            print "ENDCONFIG command to server failed.  Terminated.\n";
198 >            close($sock);
199 >            wait_then_retry();
200 >            next;
201 >        }
202  
203 <    print "Config ended.\n";
203 >        print "Config ended.\n";
204      
205 <    print $sock "FILTER\n";
206 <    $response = <$sock>;
207 <    chop $response;
208 <    $response =~ /(.*);(.*);(.*)/;
209 <    ($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
205 >        print $sock "FILTER\n";
206 >        $response = <$sock>;
207 >        if (!$response) {
208 >            print "Failed: Could not get a filter address from the filter manager.\n";
209 >            close($sock);
210 >            wait_then_retry();
211 >            next;
212 >        }
213 >        chop $response;
214 >        $response =~ /^(.*);(.*);(.*)/;
215 >        if ($response eq "ERROR") {
216 >            print "There are no active configured filters for your host.\n";
217 >            close($sock);
218 >            wait_then_retry();
219 >            next;
220 >        }
221 >        ($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
222 >        unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
223 >            print "Failed: Filter address response from server did not make sense: $response\n";
224 >            close($sock);
225 >            wait_then_retry();
226 >            next;
227 >        }
228      
229 <    print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
229 >        print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
230  
231 <    print $sock "END\n";
232 <    $response = <$sock>;
233 <    chop $response;
234 <    if ($response eq "OK") {
235 <        print "Host successfully configured via TCP.\n"
236 <    }
237 <    else {
238 <        print "The server failed the host configuration on the END command.";
239 <        exit(1);
240 <    }
231 >        print $sock "END\n";
232 >        $response = <$sock>;
233 >        if ($response && ($response eq "OK\n")) {
234 >            print "Host successfully configured via TCP.\n"
235 >        }
236 >        else {
237 >            print "The server failed the host configuration on the END command.\n";
238 >            close($sock);
239 >            wait_then_retry();
240 >            next;
241 >        }
242      
243 <    close($sock);
243 >        close($sock);
244  
245 <    print "Configuration finished sucessfully!\n";
246 <    
245 >        print "Configuration finished sucessfully!\n";
246 >        last;
247 >    }
248      return;
249   }
250  
251  
179
180
252   #-----------------------------------------------------------------------
253   # send_udp_packet
254   # Sends a UDP packet to an i-scream filter.
# Line 186 | Line 257 | sub tcp_configure() {
257   #-----------------------------------------------------------------------
258   sub send_udp_packet() {
259  
260 <    my(@statgrab) = `./statgrab.pl`;
261 <    my(%packet);
262 <    for (my($i) = 0; $i <= $#statgrab; $i++) {
263 <        $statgrab[$i] =~ /^([^\s]*) (.*)$/;
264 <        $packet{$1} = $2;
260 >    my($plugins_dir) = "plugins";
261 >    
262 >    opendir PLUGINS, $plugins_dir;
263 >    my(@plugins) = readdir PLUGINS;
264 >    foreach my $plugin (@plugins) {
265 >        push @data, `$plugins_dir/$plugin` if -x "$plugins_dir/$plugin" && -f "$plugins_dir/$plugin";
266      }
267      
268 +    # get some extra data
269      my($date) = time;
270 +    my($ip);
271 +    $ip = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost') or $ip = 'localhost';
272      
273 <    my($disk_info) = "<disk>";
274 <    my($i) = 0;
275 <    while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
276 <        $disk_info .= "<p$i";
277 <        $disk_info .= " name=\"" . $packet{"packet.disk.p$i.attributes.name"} . "\"";
278 <        $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();
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;
273 >    # add some extra data to the array
274 >    push(@data, "packet.attributes.seq_no=$seq_no");
275 >    push(@data, "packet.attributes.machine_name=$fqdn");
276 >    push(@data, "packet.attributes.date=$date");
277 >    push(@data, "packet.attributes.type=data");
278 >    push(@data, "packet.attributes.ip=$ip");
279      
280 < <packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
281 <    <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>
281 <
282 < EOF
283 <
284 <    # Make the packet smaller by stripping out newlines and leading spaces.
285 <    $xml =~ s/\n\s*//g;
280 >    # turn the array into some nice XML
281 >    my($xml) = &make_xml("", "");
282      
283      my($sock) = new IO::Socket::INET (
284                                        PeerPort => $udp_port,
285                                        PeerAddr => $filter_addr,
286                                        Proto => 'udp'
287 <                                     ) or die "Socket: $!\n";
288 <
287 >                                     ) or die "Could not send UDP: $!\n";
288 >    
289      print $sock $xml or die "Could not send UDP packet: $!\n";
290      close($sock);
291      $seq_no++;
292 <    print "-";
292 >    print "-: $xml\n";
293      
294      return;
295   }
296  
297  
302
303
298   #-----------------------------------------------------------------------
299   # send_tcp_heartbeat
300   # Establishes a TCP connection to an i-scream filter.
301   # The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
302 + # If we need to reconfigure, then we complete the heartbeat before
303 + # doing so.
304   #-----------------------------------------------------------------------
305   sub send_tcp_heartbeat() {
306  
307 +    my ($doReconfigure) = 0;
308 +
309      my($sock) = new IO::Socket::INET(
310                                       PeerAddr => $filter_addr,
311                                       PeerPort => $tcp_port,
312                                       Proto => 'tcp'
313 <                                    );
313 >                                    ) or return;
314      if (!defined $sock) {
315          print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
316 +        &tcp_configure();
317          return;
318      }
319  
# Line 323 | Line 322 | sub send_tcp_heartbeat() {
322  
323      print $sock "HEARTBEAT\n";
324      $response = <$sock>;
325 <    chop $response;
327 <    if (!$response eq "OK") {
325 >    if (!$response eq "OK\n") {
326          close($sock);
327          print "Server gave wrong response to HEARTBEAT: $response\n";
328 +        &tcp_configure();
329          return;
330      }
331      
332      print $sock "CONFIG\n";
333      $response = <$sock>;
334 <    chop $response;
336 <    if (!$response eq "OK") {
334 >    if (!$response eq "OK\n") {
335          close($sock);
336          print "Server gave wrong response to CONFIG: $response\n";
337 +        &tcp_configure();
338          return;
339      }
340  
341      print $sock "$file_list\n";
342      $response = <$sock>;
343 <    chop $response;
345 <    if (!$response eq "OK") {
343 >    if (!$response eq "OK\n") {
344          close($sock);
345          print "Server gave wrong response to file list: $response\n";
346 +        &tcp_configure();
347          return;
348      }
349      
350      print $sock "$last_modified\n";
351      $response = <$sock>;
352 <    chop $response;
354 <    if ($response eq "ERROR") {
352 >    if ($response eq "ERROR\n") {
353          close($sock);
354 <        &tcp_configure();
355 <        return;
354 >        print "Server configuration changed.  Reconfiguring with filter manager.\n";
355 >        $doReconfigure = 1;
356      }
357 <    if (!$response eq "OK") {
357 >    if (!$response eq "OK\n") {
358          close($sock);
359          print "Server gave wrong response to HEARTBEAT: $response\n";
360 +        &tcp_configure();
361          return;
362      }
363      
364      print $sock "ENDHEARTBEAT\n";
365      $response = <$sock>;
366 <    chop $response;
368 <    if (!$response eq "OK") {
366 >    if (!$response eq "OK\n") {
367          close($sock);
368          print "Server gave wrong response to ENDHEARTBEAT: $response\n";
369 +        &tcp_configure();
370          return;
371      }
372      
373      close($sock);
374      print "^";
375      
376 +    &tcp_configure() if $doReconfigure;
377 +    
378      return;
379 + }
380 +
381 +
382 + #-----------------------------------------------------------------------
383 + # write_pid
384 + # Writes the PID (process ID) of this instance to $pidfile.
385 + # This is then used by a seperate script to check (and restart) ihost.
386 + #-----------------------------------------------------------------------
387 + sub write_pid() {
388 +    open PID, ">$pidfile";
389 +    print PID $$;
390 +    close PID;
391 +    
392 +    return;
393 + }
394 +
395 + #-----------------------------------------------------------------------
396 + # make_xml
397 + # Turns an array of plugins data into an XML string.
398 + #-----------------------------------------------------------------------
399 + sub make_xml() {
400 +    my($curlevel, $curline) = @_;
401 +    my($xmltemp) = ""; my($curtag) = ""; my($attributes) = "";
402 +    while(true) {
403 +        $curline = shift(@data) if $curline eq ""; chomp $curline;
404 +        if($curline =~ /^$curlevel([^\.\s]+\.)/) {
405 +            $curtag=$1;
406 +        }
407 +        if($curline =~ /^$curlevel$curtag([^\.\s]+)\s+(.*)$/) {
408 +            $xmltemp .= "<$1$attributes>$2</$1>";
409 +        }
410 +        elsif($curline =~ /^$curlevel$curtag(attributes)\.([^\.=]+)=(.*)$/) {
411 +            $attributes .= " $2=\"$3\"";
412 +        }
413 +        else {
414 +            $xmltemp .= &make_xml("$curlevel$curtag", $curline);
415 +        }
416 +        my($nextline) = $data[0]; chomp $nextline if defined $nextline;
417 +        $curtag =~ s/(.*)\./$1/;                
418 +        if(defined $nextline && $nextline =~ /^$curlevel$curtag\./) {
419 +            $curline = "";
420 +        }
421 +        else {
422 +            $xmltemp = "<$curtag$attributes>$xmltemp</$curtag>" unless $curtag eq "";
423 +            return $xmltemp;
424 +        }
425 +    }
426   }

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