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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 1.41 by tdb, Tue Nov 20 12:47:03 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
8	<	# methods as you see fit.
9	<	#  - pjm2@ukc.ac.uk
8	>	# a typical Unix/Linux box.
9		#
10		# $Author$
11		# $Id$
#	Line 31 | Line 30 | use vars qw (
30		$tcp_port
31		$filter_addr
32		$file_list
33	+	$fqdn
34	+	$pidfile
35	+	$retry_wait
36	+	@data
37		);
38
39		if (@ARGV != 2) {
#	Line 41 | 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	+	# use home dir by default
51	+	$pidfile = $ENV{"HOME"};
52	+	# or drop it in /var/tmp if we can't find HOME
53	+	$pidfile = "/var/tmp" if not defined $pidfile;
54	+	$pidfile .= "/.ihost.pid";
55	+	&write_pid();
56	+
57		&tcp_configure();
58		&send_udp_packet();
59
#	Line 66 | Line 78 | while (1) {
78		else {
79		$delay = $next_tcp;
80		}
81	<	`sleep $delay`;
81	>	sleep $delay;
82		}
83
84	+	# we'll probably never get here...
85	+	`rm -f $pidfile`;
86		exit(0);
87
88	+
89	+	#-----------------------------------------------------------------------
90	+	# wait_then_retry
91	+	# Waits for the period of time specified in $retry_wait, then attempts
92	+	# to reconfigure with the server.
93	+	#-----------------------------------------------------------------------
94	+	sub wait_then_retry() {
95	+	print "Will retry configuration with filter manager in $retry_wait seconds.\n";
96	+	sleep $retry_wait;
97	+	}
98	+
99	+
100	+	#-----------------------------------------------------------------------
101	+	# tcp_configure
102	+	# Establishes a TCP connection to the specified i-scream filter manager.
103	+	# The host then requests details from the server, such as the intervals
104	+	# at which to send UDP packets.
105	+	#-----------------------------------------------------------------------
106		sub tcp_configure() {
107
108	<	my($sock) = new IO::Socket::INET(
109	<	PeerAddr => $filter_manager_addr,
110	<	PeerPort => $filter_manager_port,
111	<	Proto => 'tcp'
112	<	) or die "Could not perform configuration via TCP: $!\n";
108	>	while (1) {
109	>	my($sock) = new IO::Socket::INET(
110	>	PeerAddr => $filter_manager_addr,
111	>	PeerPort => $filter_manager_port,
112	>	Proto => 'tcp'
113	>	) or die "Cannot connect!";
114	>	if (!defined $sock) {
115	>	print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
116	>	print "Please check that there is an i-scream server at this address.\n";
117	>	wait_then_retry();
118	>	next;
119	>	}
120
121	<	die "Could not connect to the i-scream filter manager: $!\n" unless $sock;
122	<
84	<	# Now run through the configuration process.
85	<	my($response);
121	>	# Now run through the configuration process...
122	>	my($response);
123
124	<	print $sock "STARTCONFIG\n";
125	<	$response = <$sock>;
126	<	if (!chop $response eq "OK") {
127	<	print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
128	<	exit(1);
129	<	}
124	>	print $sock "STARTCONFIG\n";
125	>	$response = <$sock>;
126	>	if ($response && !($response eq "OK\n")) {
127	>	print "The i-scream server rejected the STARTCONFIG command.\n";
128	>	close($sock);
129	>	wait_then_retry();
130	>	next;
131	>	}
132
133	<	print "Config started okay.\n";
133	>	print "Config started okay.\n";
134
135	<	print $sock "LASTMODIFIED\n";
136	<	$response = <$sock>;
137	<	chop $response;
138	<	$last_modified = $response;
135	>	print $sock "LASTMODIFIED\n";
136	>	$response = <$sock>;
137	>	if (!$response) {
138	>	print "The i-scream server did not return anything for the LASTMODIFIED command.\n";
139	>	close($sock);
140	>	wait_then_retry();
141	>	next;
142	>	}
143	>	chop $response;
144	>	$last_modified = $response;
145
146	<	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
146	>	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
147
148	<	print $sock "FILELIST\n";
149	<	$response = <$sock>;
150	<	chop $response;
151	<	$file_list = $response;
148	>	print $sock "FILELIST\n";
149	>	$response = <$sock>;
150	>	if (!$response) {
151	>	print "The i-scream server did not provide a configuration file list.\n";
152	>	close($sock);
153	>	wait_then_retry();
154	>	next;
155	>	}
156	>	chop $response;
157	>	$file_list = $response;
158
159	<	print "File list obtained: $file_list\n";
159	>	print "File list obtained: $file_list\n";
160
161	<	print $sock "UDPUpdateTime\n";
162	<	$response = <$sock>;
163	<	chop $response;
164	<	$udp_update_time = $response;
161	>	print $sock "FQDN\n";
162	>	$response = <$sock>;
163	>	if (!$response) {
164	>	print "The i-scream server did not tell us our FQDN.\n";
165	>	close($sock);
166	>	wait_then_retry();
167	>	next;
168	>	}
169	>	chop $response;
170	>	$fqdn = $response;
171
172	<	print $sock "TCPUpdateTime\n";
173	<	$response = <$sock>;
174	<	chop $response;
175	<	$tcp_update_time = $response;
172	>	print "FQDN returned: $fqdn\n";
173	>
174	>	print $sock "UDPUpdateTime\n";
175	>	$response = <$sock>;
176	>	if (!$response) {
177	>	print "The i-scream server did not give us a UDPUpdateTime.\n";
178	>	close($sock);
179	>	wait_then_retry();
180	>	next;
181	>	}
182	>	chop $response;
183	>	$udp_update_time = $response;
184	>
185	>	print $sock "TCPUpdateTime\n";
186	>	$response = <$sock>;
187	>	if (!$response) {
188	>	print "The i-scream server did not give us a TCPUpdateTime.\n";
189	>	close($sock);
190	>	wait_then_retry();
191	>	next;
192	>	}
193	>	chop $response;
194	>	$tcp_update_time = $response;
195
196	<	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
196	>	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
197
198	<	print $sock "ENDCONFIG\n";
199	<	$response = <$sock>;
200	<	chomp $response;
201	<	if (!$response eq "OK") {
202	<	print "ENDCONFIG command to server failed.  Terminated.\n";
203	<	exit(1);
204	<	}
198	>	print $sock "ENDCONFIG\n";
199	>	$response = <$sock>;
200	>	if ($response && !($response eq "OK\n")) {
201	>	print "ENDCONFIG command to server failed.  Terminated.\n";
202	>	close($sock);
203	>	wait_then_retry();
204	>	next;
205	>	}
206
207	<	print "Config ended.\n";
207	>	print "Config ended.\n";
208
209	<	print $sock "FILTER\n";
210	<	$response = <$sock>;
211	<	chop $response;
212	<	$response =~ /(.*);(.*);(.*)/;
213	<	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
209	>	print $sock "FILTER\n";
210	>	$response = <$sock>;
211	>	if (!$response) {
212	>	print "Failed: Could not get a filter address from the filter manager.\n";
213	>	close($sock);
214	>	wait_then_retry();
215	>	next;
216	>	}
217	>	chop $response;
218	>	$response =~ /^(.*);(.*);(.*)/;
219	>	if ($response eq "ERROR") {
220	>	print "There are no active configured filters for your host.\n";
221	>	close($sock);
222	>	wait_then_retry();
223	>	next;
224	>	}
225	>	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
226	>	unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
227	>	print "Failed: Filter address response from server did not make sense: $response\n";
228	>	close($sock);
229	>	wait_then_retry();
230	>	next;
231	>	}
232
233	<	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
233	>	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
234
235	<	print $sock "END\n";
236	<	$response = <$sock>;
237	<	chop $response;
238	<	if ($response eq "OK") {
239	<	print "Host successfully configured via TCP.\n"
240	<	}
241	<	else {
242	<	print "The server failed the host configuration on the END command.";
243	<	exit(1);
244	<	}
235	>	print $sock "END\n";
236	>	$response = <$sock>;
237	>	if ($response && ($response eq "OK\n")) {
238	>	print "Host successfully configured via TCP.\n"
239	>	}
240	>	else {
241	>	print "The server failed the host configuration on the END command.\n";
242	>	close($sock);
243	>	wait_then_retry();
244	>	next;
245	>	}
246
247	<	close($sock);
247	>	close($sock);
248
249	<	print "Configuration finished sucessfully!\n";
249	>	print "Configuration finished sucessfully!\n";
250	>	last;
251	>	}
252	>	return;
253		}
254
255	+
256	+	#-----------------------------------------------------------------------
257	+	# send_udp_packet
258	+	# Sends a UDP packet to an i-scream filter.
259	+	# The packet contains XML markup describing some of the machine's state.
260	+	# Receipt of UDP packets is not guaranteed.
261	+	#-----------------------------------------------------------------------
262		sub send_udp_packet() {
263
264	<	my(@statgrab) = `./statgrab.pl`;
265	<	my(%packet);
266	<	for (my($i) = 0; $i < $#statgrab; $i++) {
267	<	$statgrab[$i] =~ /^([^\s]*) (.*)$/;
268	<	$packet{$1} = $2;
264	>	my($plugins_dir) = "plugins";
265	>
266	>	opendir PLUGINS, $plugins_dir;
267	>	my(@plugins) = readdir PLUGINS;
268	>	foreach my $plugin (@plugins) {
269	>	push @data, `$plugins_dir/$plugin` if -x "$plugins_dir/$plugin" && -f "$plugins_dir/$plugin";
270		}
271
272	+	# get some extra data
273		my($date) = time;
274	+	my($ip);
275	+	$ip = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost') or $ip = 'localhost';
276
277	<	my($disk_info) = "<disk>";
278	<	my($i) = 0;
279	<	while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
280	<	$disk_info .= "<p$i>";
281	<	$disk_info .= qq/<name>$packet{"packet.disk.p$i.attributes.name"}<\/name>/;
282	<	$disk_info .= qq/<kbytes>$packet{"packet.disk.p$i.attributes.kbytes"}<\/kbytes>/;
173	<	$disk_info .= qq/<used>$packet{"packet.disk.p$i.attributes.used"}<\/used>/;
174	<	$disk_info .= qq/<avail>$packet{"packet.disk.p$i.attributes.avail"}<\/avail>/;
175	<	$disk_info .= qq/<mount>$packet{"packet.disk.p$i.attributes.mount"}<\/mount>/;
176	<	$disk_info .= "</p$i>";
177	<	++$i;
178	<	}
179	<	$disk_info .= "</disk>";
180	<
181	<	my($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');
187	<
188	<	# Build the XML packet this way, as we can clearly
189	<	# see the structure and contents... I like this ;-)
190	<	my($xml) = <<EOF;
277	>	# add some extra data to the array
278	>	push(@data, "packet.attributes.seq_no=$seq_no");
279	>	push(@data, "packet.attributes.machine_name=$fqdn");
280	>	push(@data, "packet.attributes.date=$date");
281	>	push(@data, "packet.attributes.type=data");
282	>	push(@data, "packet.attributes.ip=$ip");
283
284	<	<packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
285	<	<load>
194	<	<load1>$packet{"packet.load.load1"}</load1>
195	<	<load5>$packet{"packet.load.load5"}</load5>
196	<	<load15>$packet{"packet.load.load15"}</load15>
197	<	</load>
198	<	<os>
199	<	<name>$packet{"packet.os.name"}</name>
200	<	<release>$packet{"packet.os.release"}</release>
201	<	<platform>$packet{"packet.os.platform"}</platform>
202	<	<sysname>$packet{"packet.os.sysname"}</sysname>
203	<	<version>$packet{"packet.os.version"}</version>
204	<	</os>
205	<	<users>
206	<	<count>$packet{"packet.users.count"}</count>
207	<	<list>$packet{"packet.users.list"}</list>
208	<	</users>
209	<	<processes>
210	<	<total>$packet{"packet.processes.total"}</total>
211	<	<sleeping>$packet{"packet.processes.sleeping"}</sleeping>
212	<	<zombie>$packet{"packet.processes.zombie"}</zombie>
213	<	<stopped>$packet{"packet.processes.stopped"}</stopped>
214	<	<cpu>$packet{"packet.processes.cpu"}</cpu>
215	<	</processes>
216	<	<cpu>
217	<	<idle>$packet{"packet.cpu.idle"}</idle>
218	<	<user>$packet{"packet.cpu.user"}</user>
219	<	<kernel>$packet{"packet.cpu.kernel"}</kernel>
220	<	<iowait>$packet{"packet.cpu.iowait"}</iowait>
221	<	<swap>$packet{"packet.cpu.swap"}</swap>
222	<	</cpu>
223	<	<memory>
224	<	<total>$packet{"packet.memory.real"}</total>
225	<	<free>$packet{"packet.memory.free"}</free>
226	<	</memory>
227	<	<swap>
228	<	<total>$packet{"packet.memory.swap_total"}</total>
229	<	<free>$packet{"packet.memory.swap_free"}</free>
230	<	</swap>
231	<	$disk_info
232	<	</packet>
233	<
234	<	EOF
235	<
236	<	$xml =~ s/\n\s*//g;
284	>	# sort the data
285	>	@data = sort(@data);
286
287	+	# turn the array into some nice XML
288	+	my($xml) = &make_xml("", "");
289	+
290		my($sock) = new IO::Socket::INET (
291		PeerPort => $udp_port,
292		PeerAddr => $filter_addr,
293		Proto => 'udp'
294	<	) or die "Socket: $!\n";
295	<
294	>	) or die "Could not send UDP: $!\n";
295	>
296		print $sock $xml or die "Could not send UDP packet: $!\n";
297		close($sock);
298		$seq_no++;
299		print "-";
300	+
301	+	return;
302		}
303
304	+
305	+	#-----------------------------------------------------------------------
306	+	# send_tcp_heartbeat
307	+	# Establishes a TCP connection to an i-scream filter.
308	+	# The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
309	+	# If we need to reconfigure, then we complete the heartbeat before
310	+	# doing so.
311	+	#-----------------------------------------------------------------------
312		sub send_tcp_heartbeat() {
313
314	+	my ($doReconfigure) = 0;
315	+
316		my($sock) = new IO::Socket::INET(
317		PeerAddr => $filter_addr,
318		PeerPort => $tcp_port,
319		Proto => 'tcp'
320	<	) or die "Could not perform heartbeat via TCP: $!\n";
320	>	) or return;
321	>	if (!defined $sock) {
322	>	print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
323	>	&tcp_configure();
324	>	return;
325	>	}
326
258	–	die "Could not connect to the i-scream filter: $!\n" unless $sock;
259	–
327		# Now run through the configuration process.
328		my($response);
329
330		print $sock "HEARTBEAT\n";
331		$response = <$sock>;
332	<	chop $response;
266	<	if (!$response eq "OK") {
332	>	if (!$response eq "OK\n") {
333		close($sock);
334		print "Server gave wrong response to HEARTBEAT: $response\n";
335	+	&tcp_configure();
336		return;
337		}
338
339		print $sock "CONFIG\n";
340		$response = <$sock>;
341	<	chop $response;
275	<	if (!$response eq "OK") {
341	>	if (!$response eq "OK\n") {
342		close($sock);
343		print "Server gave wrong response to CONFIG: $response\n";
344	+	&tcp_configure();
345		return;
346		}
347
348		print $sock "$file_list\n";
349		$response = <$sock>;
350	<	chop $response;
284	<	if (!$response eq "OK") {
350	>	if (!$response eq "OK\n") {
351		close($sock);
352		print "Server gave wrong response to file list: $response\n";
353	+	&tcp_configure();
354		return;
355		}
356
357		print $sock "$last_modified\n";
358		$response = <$sock>;
359	<	chop $response;
293	<	if ($response eq "ERROR") {
359	>	if ($response eq "ERROR\n") {
360		close($sock);
361	<	&tcp_configure();
362	<	return;
361	>	print "Server configuration changed.  Reconfiguring with filter manager.\n";
362	>	$doReconfigure = 1;
363		}
364	<	if (!$response eq "OK") {
364	>	if (!$response eq "OK\n") {
365		close($sock);
366		print "Server gave wrong response to HEARTBEAT: $response\n";
367	+	&tcp_configure();
368		return;
369		}
370
371		print $sock "ENDHEARTBEAT\n";
372		$response = <$sock>;
373	<	chop $response;
307	<	if (!$response eq "OK") {
373	>	if (!$response eq "OK\n") {
374		close($sock);
375		print "Server gave wrong response to ENDHEARTBEAT: $response\n";
376	+	&tcp_configure();
377		return;
378		}
379
380		close($sock);
381		print "^";
382	+
383	+	&tcp_configure() if $doReconfigure;
384	+
385	+	return;
386	+	}
387	+
388	+
389	+	#-----------------------------------------------------------------------
390	+	# write_pid
391	+	# Writes the PID (process ID) of this instance to $pidfile.
392	+	# This is then used by a seperate script to check (and restart) ihost.
393	+	#-----------------------------------------------------------------------
394	+	sub write_pid() {
395	+	open PID, ">$pidfile";
396	+	print PID $$;
397	+	close PID;
398	+
399	+	return;
400	+	}
401	+
402	+	#-----------------------------------------------------------------------
403	+	# make_xml
404	+	# Turns an array of plugins data into an XML string.
405	+	#-----------------------------------------------------------------------
406	+	sub make_xml() {
407	+	my($curlevel, $curline) = @_;
408	+	my($xmltemp) = ""; my($curtag) = ""; my($attributes) = "";
409	+	while(1) {
410	+	$curline = shift(@data) if $curline eq ""; chomp $curline;
411	+	if($curline =~ /^$curlevel([^\.\s]+\.)/) {
412	+	$curtag=$1;
413	+	}
414	+	if($curline =~ /^$curlevel$curtag([^\.\s]+)\s+(.*)$/) {
415	+	$xmltemp .= "<$1$attributes>$2</$1>";
416	+	}
417	+	elsif($curline =~ /^$curlevel$curtag(attributes)\.([^\.=]+)=(.*)$/) {
418	+	$attributes .= " $2=\"$3\"";
419	+	}
420	+	else {
421	+	$xmltemp .= &make_xml("$curlevel$curtag", $curline);
422	+	}
423	+	my($nextline) = $data[0]; chomp $nextline if defined $nextline;
424	+	$curtag =~ s/(.*)\./$1/;
425	+	if((defined $nextline) && ($nextline =~ /^$curlevel$curtag\./)) {
426	+	$curline = "";
427	+	}
428	+	else {
429	+	$xmltemp = "<$curtag$attributes>$xmltemp</$curtag>" unless $curtag eq "";
430	+	return $xmltemp;
431	+	}
432	+	}
433		}

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