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Comparing projects/cms/source/host/ihost-perl/ihost.pl (file contents):
Revision 1.1 by pjm2, Fri Jan 26 17:09:29 2001 UTC vs.
Revision 1.30 by pjm2, Thu Mar 15 09:44:08 2001 UTC

#	Line 1 | Line 1
1	<	#!/usr/local/bin/perl -w
1	>	#!/usr/bin/perl -w
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	+	$pidfile
37	+	$retry_wait
38		);
39
40		if (@ARGV != 2) {
#	Line 41 | Line 45 | $filter_manager_addr = $ARGV[0];
45		$filter_manager_port = $ARGV[1];
46
47		$seq_no = 1;
48	+	$retry_wait = 600;
49
50	+	# write our PID to a file
51	+	$pidfile = "/var/tmp/ihost.pid";
52	+	&write_pid();
53	+
54		&tcp_configure();
55		&send_udp_packet();
56
57		$last_udp_time = time;
58		$last_tcp_time = time;
59		while (1) {
60	<	if (time >= $last_udp_time + $udp_update_time) {
60	>	my($time) = time;
61	>	if ($time >= $last_udp_time + $udp_update_time) {
62		&send_udp_packet();
63	<	$last_udp_time = time;
63	>	$last_udp_time = $time;
64		}
65	<	if (time >= $last_tcp_time + $tcp_update_time) {
65	>	if ($time >= $last_tcp_time + $tcp_update_time) {
66		&send_tcp_heartbeat();
67	<	$last_tcp_time = time;
67	>	$last_tcp_time = $time;
68		}
69	<	`sleep 1`;
69	>	my($next_udp) = $udp_update_time - $time + $last_udp_time;
70	>	my($next_tcp) = $tcp_update_time - $time + $last_tcp_time;
71	>	my($delay);
72	>	if ($next_udp < $next_tcp) {
73	>	$delay = $next_udp
74	>	}
75	>	else {
76	>	$delay = $next_tcp;
77	>	}
78	>	`sleep $delay`;
79		}
80
81	+	# we'll probably never get here...
82	+	`rm -f $pidfile`;
83		exit(0);
84
85	+
86	+	#-----------------------------------------------------------------------
87	+	# wait_then_retry
88	+	# Waits for the period of time specified in $retry_wait, then attempts
89	+	# to reconfigure with the server.
90	+	#-----------------------------------------------------------------------
91	+	sub wait_then_retry() {
92	+	print "Will retry configuration with filter manager in $retry_wait seconds.\n";
93	+	`sleep $retry_wait`;
94	+	}
95	+
96	+
97	+	#-----------------------------------------------------------------------
98	+	# tcp_configure
99	+	# Establishes a TCP connection to the specified i-scream filter manager.
100	+	# The host then requests details from the server, such as the intervals
101	+	# at which to send UDP packets.
102	+	#-----------------------------------------------------------------------
103		sub tcp_configure() {
104
105	<	my($sock) = new IO::Socket::INET(
106	<	PeerAddr => $filter_manager_addr,
107	<	PeerPort => $filter_manager_port,
108	<	Proto => 'tcp'
109	<	) or die "Could not perform configuration via TCP: $!\n";
105	>	while (1 == 1) {
106	>	my($sock) = new IO::Socket::INET(
107	>	PeerAddr => $filter_manager_addr,
108	>	PeerPort => $filter_manager_port,
109	>	Proto => 'tcp'
110	>	) or die "Cannot connect!";
111	>	if (!defined $sock) {
112	>	print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
113	>	print "Please check that there is an i-scream server at this address.\n";
114	>	wait_then_retry();
115	>	next;
116	>	}
117
118	<	die "Could not connect to the i-scream filter manager: $!\n" unless $sock;
119	<
74	<	# Now run through the configuration process.
75	<	my($response);
118	>	# Now run through the configuration process...
119	>	my($response);
120
121	<	print $sock "STARTCONFIG\n";
122	<	$response = <$sock>;
123	<	if (!chop $response eq "OK") {
124	<	print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
125	<	exit(1);
126	<	}
121	>	print $sock "STARTCONFIG\n";
122	>	$response = <$sock>;
123	>	if (!chop $response eq "OK") {
124	>	print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
125	>	close($sock);
126	>	wait_then_retry();
127	>	next;
128	>	}
129
130	<	print "Config started okay.\n";
130	>	print "Config started okay.\n";
131
132	<	print $sock "LASTMODIFIED\n";
133	<	$response = <$sock>;
134	<	chop $response;
135	<	$last_modified = $response;
132	>	print $sock "LASTMODIFIED\n";
133	>	$response = <$sock>;
134	>	chop $response;
135	>	$last_modified = $response;
136
137	<	print "Config last modified: ". scalar localtime $last_modified . "\n";
137	>	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
138
139	<	print $sock "FILELIST\n";
140	<	$response = <$sock>;
141	<	chop $response;
142	<	$file_list = $response;
139	>	print $sock "FILELIST\n";
140	>	$response = <$sock>;
141	>	chop $response;
142	>	$file_list = $response;
143
144	<	print "File list obtained: $file_list\n";
144	>	print "File list obtained: $file_list\n";
145
146	<	print $sock "UDPUpdateTime\n";
147	<	$response = <$sock>;
148	<	chop $response;
149	<	$udp_update_time = $response;
146	>	print $sock "FQDN\n";
147	>	$response = <$sock>;
148	>	chop $response;
149	>	$fqdn = $response;
150
151	<	print $sock "TCPUpdateTime\n";
152	<	$response = <$sock>;
153	<	chop $response;
154	<	$tcp_update_time = $response;
151	>	print "FQDN returned: $fqdn\n";
152	>
153	>	print $sock "UDPUpdateTime\n";
154	>	$response = <$sock>;
155	>	chop $response;
156	>	$udp_update_time = $response;
157	>
158	>	print $sock "TCPUpdateTime\n";
159	>	$response = <$sock>;
160	>	chop $response;
161	>	$tcp_update_time = $response;
162
163	<	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time.\n";
163	>	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
164
165	<	print $sock "ENDCONFIG\n";
166	<	$response = <$sock>;
167	<	chomp $response;
168	<	if (!$response eq "OK") {
169	<	print "ENDCONFIG command to server failed.  Terminated.\n";
170	<	exit(1);
171	<	}
165	>	print $sock "ENDCONFIG\n";
166	>	$response = <$sock>;
167	>	chomp $response;
168	>	if (!$response eq "OK") {
169	>	print "ENDCONFIG command to server failed.  Terminated.\n";
170	>	close($sock);
171	>	wait_then_retry();
172	>	next;
173	>	}
174
175	<	print "Config ended.\n";
175	>	print "Config ended.\n";
176
177	<	print $sock "FILTER\n";
178	<	$response = <$sock>;
179	<	chop $response;
180	<	$response =~ /(.*);(.*);(.*)/;
181	<	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
177	>	print $sock "FILTER\n";
178	>	$response = <$sock>;
179	>	unless (defined($response)) {
180	>	print "Failed: Could not get a filter address from the filter manager.\n";
181	>	close($sock);
182	>	wait_then_retry();
183	>	next;
184	>	}
185	>	chop $response;
186	>	$response =~ /(.*);(.*);(.*)/;
187	>	if ($response eq "ERROR") {
188	>	print "There are no active configured filters for your host.\n";
189	>	close($sock);
190	>	wait_then_retry();
191	>	next;
192	>	}
193	>	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
194	>	unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
195	>	print "Failed: Filter address response from server did not make sense: $response\n";
196	>	close($sock);
197	>	wait_then_retry();
198	>	next;
199	>	}
200
201	<	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
201	>	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
202
203	<	print $sock "END\n";
204	<	$response = <$sock>;
205	<	chop $response;
206	<	if ($response eq "OK") {
207	<	print "Host successfully configured via TCP.\n"
208	<	}
209	<	else {
210	<	print "The server failed the host configuration on the END command.";
211	<	exit(1);
212	<	}
203	>	print $sock "END\n";
204	>	$response = <$sock>;
205	>	chop $response;
206	>	if ($response eq "OK") {
207	>	print "Host successfully configured via TCP.\n"
208	>	}
209	>	else {
210	>	print "The server failed the host configuration on the END command.";
211	>	close($sock);
212	>	wait_then_retry();
213	>	next;
214	>	}
215
216	<	close($sock);
216	>	close($sock);
217
218	<	print "Configuration finished sucessfully!\n";
218	>	print "Configuration finished sucessfully!\n";
219	>	last;
220	>	}
221	>	return;
222		}
223
224	+
225	+
226	+
227	+	#-----------------------------------------------------------------------
228	+	# send_udp_packet
229	+	# Sends a UDP packet to an i-scream filter.
230	+	# The packet contains XML markup describing some of the machine's state.
231	+	# Receipt of UDP packets is not guaranteed.
232	+	#-----------------------------------------------------------------------
233		sub send_udp_packet() {
234
235		my(@statgrab) = `./statgrab.pl`;
236		my(%packet);
237	<	for (my($i) = 0; $i < $#statgrab; $i++) {
237	>	for (my($i) = 0; $i <= $#statgrab; $i++) {
238		$statgrab[$i] =~ /^([^\s]*) (.*)$/;
239		$packet{$1} = $2;
240		}
#	Line 157 | Line 244 | sub send_udp_packet() {
244		my($disk_info) = "<disk>";
245		my($i) = 0;
246		while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
247	<	$disk_info .= "<p$i>";
248	<	$disk_info .= qq/<name>$packet{"packet.disk.p$i.attributes.name"}<\/name>/;
249	<	$disk_info .= qq/<kbytes>$packet{"packet.disk.p$i.attributes.kbytes"}<\/kbytes>/;
250	<	$disk_info .= qq/<used>$packet{"packet.disk.p$i.attributes.used"}<\/used>/;
251	<	$disk_info .= qq/<avail>$packet{"packet.disk.p$i.attributes.avail"}<\/avail>/;
252	<	$disk_info .= qq/<mount>$packet{"packet.disk.p$i.attributes.mount"}<\/mount>/;
253	<	$disk_info .= "</p$i>";
247	>	$disk_info .= "<p$i";
248	>	$disk_info .= " name=\"" . $packet{"packet.disk.p$i.attributes.name"} . "\"";
249	>	$disk_info .= " kbytes=\"" . $packet{"packet.disk.p$i.attributes.kbytes"} . "\"";
250	>	$disk_info .= " used=\"" . $packet{"packet.disk.p$i.attributes.used"} . "\"";
251	>	$disk_info .= " avail=\"" . $packet{"packet.disk.p$i.attributes.avail"} . "\"";
252	>	$disk_info .= " mount=\"" . $packet{"packet.disk.p$i.attributes.mount"} . "\"";
253	>	$disk_info .= "></p$i>";
254		++$i;
255		}
256		$disk_info .= "</disk>";
257
258	<	my($hostname) = hostname();
172	<	$hostname =~ s/^([^\.]*?)/$1/;
173	<	my($domainname) = `cat /etc/resolv.conf`;
174	<	$domainname =~ s/domain\s*([^\s]*?)/$1/;
175	<	my($machine_name) = "$hostname.$domainname";
176	<	my($ip) = inet_ntoa(scalar(gethostbyname($hostname)) || 'localhost');
258	>	my($ip) = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost');
259
260		# Build the XML packet this way, as we can clearly
261		# see the structure and contents... I like this ;-)
262	+	# [Note that the server rejects UDP packets that are
263	+	# larger than 8196 bytes]
264		my($xml) = <<EOF;
265
266	<	<packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
266	>	<packet seq_no="$seq_no" machine_name="$fqdn" date="$date" type="data" ip="$ip">
267		<load>
268		<load1>$packet{"packet.load.load1"}</load1>
269		<load5>$packet{"packet.load.load5"}</load5>
#	Line 191 | Line 275 | sub send_udp_packet() {
275		<platform>$packet{"packet.os.platform"}</platform>
276		<sysname>$packet{"packet.os.sysname"}</sysname>
277		<version>$packet{"packet.os.version"}</version>
278	+	<uptime>$packet{"packet.os.uptime"}</uptime>
279		</os>
280		<users>
281		<count>$packet{"packet.users.count"}</count>
#	Line 211 | Line 296 | sub send_udp_packet() {
296		<swap>$packet{"packet.cpu.swap"}</swap>
297		</cpu>
298		<memory>
299	<	<total>$packet{"packet.memory.real"}</total>
299	>	<total>$packet{"packet.memory.total"}</total>
300		<free>$packet{"packet.memory.free"}</free>
301		</memory>
302		<swap>
303	<	<total>$packet{"packet.memory.swap_total"}</total>
304	<	<free>$packet{"packet.memory.swap_free"}</free>
303	>	<total>$packet{"packet.swap.total"}</total>
304	>	<free>$packet{"packet.swap.free"}</free>
305		</swap>
306		$disk_info
307		</packet>
308
309		EOF
310
311	+	# Make the packet smaller by stripping out newlines and leading spaces.
312		$xml =~ s/\n\s*//g;
313	<
313	>
314		my($sock) = new IO::Socket::INET (
315		PeerPort => $udp_port,
316		PeerAddr => $filter_addr,
317		Proto => 'udp'
318	<	) or die "Socket: $!\n";
318	>	) or die "Could not send UDP: $!\n";
319
320		print $sock $xml or die "Could not send UDP packet: $!\n";
321		close($sock);
322		$seq_no++;
323		print "-";
324	+
325	+	return;
326		}
327
328	+
329	+
330	+
331	+	#-----------------------------------------------------------------------
332	+	# send_tcp_heartbeat
333	+	# Establishes a TCP connection to an i-scream filter.
334	+	# The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
335	+	#-----------------------------------------------------------------------
336		sub send_tcp_heartbeat() {
337
338		my($sock) = new IO::Socket::INET(
339		PeerAddr => $filter_addr,
340		PeerPort => $tcp_port,
341		Proto => 'tcp'
342	<	) or die "Could not perform heartbeat via TCP: $!\n";
342	>	) or return;
343	>	if (!defined $sock) {
344	>	print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
345	>	&tcp_configure();
346	>	return;
347	>	}
348
248	–	die "Could not connect to the i-scream filter: $!\n" unless $sock;
249	–
349		# Now run through the configuration process.
350		my($response);
351
352		print $sock "HEARTBEAT\n";
353		$response = <$sock>;
354	+	return if (!defined $response);
355		chop $response;
356		if (!$response eq "OK") {
357		close($sock);
358		print "Server gave wrong response to HEARTBEAT: $response\n";
359	+	&tcp_configure();
360		return;
361		}
362
363		print $sock "CONFIG\n";
364		$response = <$sock>;
365	+	return if (!defined $response);
366		chop $response;
367		if (!$response eq "OK") {
368		close($sock);
369		print "Server gave wrong response to CONFIG: $response\n";
370	+	&tcp_configure();
371		return;
372		}
373
374		print $sock "$file_list\n";
375		$response = <$sock>;
376	+	return if (!defined $response);
377		chop $response;
378		if (!$response eq "OK") {
379		close($sock);
380		print "Server gave wrong response to file list: $response\n";
381	+	&tcp_configure();
382		return;
383		}
384
385		print $sock "$last_modified\n";
386		$response = <$sock>;
387	+	return if (!defined $response);
388		chop $response;
389		if ($response eq "ERROR") {
390		close($sock);
391	+	print "Server configuration changed.  Reconfiguring with filter manager.\n";
392		&tcp_configure();
393		return;
394		}
395		if (!$response eq "OK") {
396		close($sock);
397		print "Server gave wrong response to HEARTBEAT: $response\n";
398	+	&tcp_configure();
399		return;
400		}
401
402		print $sock "ENDHEARTBEAT\n";
403		$response = <$sock>;
404	+	return if (!defined $response);
405		chop $response;
406		if (!$response eq "OK") {
407		close($sock);
408		print "Server gave wrong response to ENDHEARTBEAT: $response\n";
409	+	&tcp_configure();
410		return;
411		}
412
413		close($sock);
414		print "^";
415	+
416	+	return;
417	+	}
418	+
419	+	#-----------------------------------------------------------------------
420	+	# write_pid
421	+	# Writes the PID (process ID) of this instance to $pidfile.
422	+	# This is then used by a seperate script to check (and restart) ihost.
423	+	#-----------------------------------------------------------------------
424	+	sub write_pid() {
425	+	open PID, ">$pidfile";
426	+	print PID $$;
427	+	close PID;
428	+
429	+	return;
430		}

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