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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 1.35 by tdb, Wed Nov 14 14:17:12 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	+	$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 = 60;
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
#	Line 66 | Line 75 | while (1) {
75		else {
76		$delay = $next_tcp;
77		}
78	<	`sleep $delay`;
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: $!\n";
105	>	while (1) {
106	>	my($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 $sock;
119	<
84	<	# Now run through the configuration process.
85	<	my($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 ($response && !($response eq "OK\n")) {
124	>	print "The i-scream server rejected the STARTCONFIG command.\n";
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	>	if (!$response) {
135	>	print "The i-scream server did not return anything for the LASTMODIFIED command.\n";
136	>	close($sock);
137	>	wait_then_retry();
138	>	next;
139	>	}
140	>	chop $response;
141	>	$last_modified = $response;
142
143	<	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
143	>	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
144
145	<	print $sock "FILELIST\n";
146	<	$response = <$sock>;
147	<	chop $response;
148	<	$file_list = $response;
145	>	print $sock "FILELIST\n";
146	>	$response = <$sock>;
147	>	if (!$response) {
148	>	print "The i-scream server did not provide a configuration file list.\n";
149	>	close($sock);
150	>	wait_then_retry();
151	>	next;
152	>	}
153	>	chop $response;
154	>	$file_list = $response;
155
156	<	print "File list obtained: $file_list\n";
156	>	print "File list obtained: $file_list\n";
157
158	<	print $sock "UDPUpdateTime\n";
159	<	$response = <$sock>;
160	<	chop $response;
161	<	$udp_update_time = $response;
158	>	print $sock "FQDN\n";
159	>	$response = <$sock>;
160	>	if (!$response) {
161	>	print "The i-scream server did not tell us our FQDN.\n";
162	>	close($sock);
163	>	wait_then_retry();
164	>	next;
165	>	}
166	>	chop $response;
167	>	$fqdn = $response;
168
169	<	print $sock "TCPUpdateTime\n";
170	<	$response = <$sock>;
171	<	chop $response;
172	<	$tcp_update_time = $response;
169	>	print "FQDN returned: $fqdn\n";
170	>
171	>	print $sock "UDPUpdateTime\n";
172	>	$response = <$sock>;
173	>	if (!$response) {
174	>	print "The i-scream server did not give us a UDPUpdateTime.\n";
175	>	close($sock);
176	>	wait_then_retry();
177	>	next;
178	>	}
179	>	chop $response;
180	>	$udp_update_time = $response;
181	>
182	>	print $sock "TCPUpdateTime\n";
183	>	$response = <$sock>;
184	>	if (!$response) {
185	>	print "The i-scream server did not give us a TCPUpdateTime.\n";
186	>	close($sock);
187	>	wait_then_retry();
188	>	next;
189	>	}
190	>	chop $response;
191	>	$tcp_update_time = $response;
192
193	<	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
193	>	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
194
195	<	print $sock "ENDCONFIG\n";
196	<	$response = <$sock>;
197	<	chomp $response;
198	<	if (!$response eq "OK") {
199	<	print "ENDCONFIG command to server failed.  Terminated.\n";
200	<	exit(1);
201	<	}
195	>	print $sock "ENDCONFIG\n";
196	>	$response = <$sock>;
197	>	if ($response && !($response eq "OK\n")) {
198	>	print "ENDCONFIG command to server failed.  Terminated.\n";
199	>	close($sock);
200	>	wait_then_retry();
201	>	next;
202	>	}
203
204	<	print "Config ended.\n";
204	>	print "Config ended.\n";
205
206	<	print $sock "FILTER\n";
207	<	$response = <$sock>;
208	<	chop $response;
209	<	$response =~ /(.*);(.*);(.*)/;
210	<	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
206	>	print $sock "FILTER\n";
207	>	$response = <$sock>;
208	>	if (!$response) {
209	>	print "Failed: Could not get a filter address from the filter manager.\n";
210	>	close($sock);
211	>	wait_then_retry();
212	>	next;
213	>	}
214	>	chop $response;
215	>	$response =~ /^(.*);(.*);(.*)/;
216	>	if ($response eq "ERROR") {
217	>	print "There are no active configured filters for your host.\n";
218	>	close($sock);
219	>	wait_then_retry();
220	>	next;
221	>	}
222	>	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
223	>	unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
224	>	print "Failed: Filter address response from server did not make sense: $response\n";
225	>	close($sock);
226	>	wait_then_retry();
227	>	next;
228	>	}
229
230	<	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
230	>	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
231
232	<	print $sock "END\n";
233	<	$response = <$sock>;
234	<	chop $response;
235	<	if ($response eq "OK") {
236	<	print "Host successfully configured via TCP.\n"
237	<	}
238	<	else {
239	<	print "The server failed the host configuration on the END command.";
240	<	exit(1);
241	<	}
232	>	print $sock "END\n";
233	>	$response = <$sock>;
234	>	if ($response && ($response eq "OK\n")) {
235	>	print "Host successfully configured via TCP.\n"
236	>	}
237	>	else {
238	>	print "The server failed the host configuration on the END command.\n";
239	>	close($sock);
240	>	wait_then_retry();
241	>	next;
242	>	}
243
244	<	close($sock);
244	>	close($sock);
245
246	<	print "Configuration finished sucessfully!\n";
246	>	print "Configuration finished sucessfully!\n";
247	>	last;
248	>	}
249	>	return;
250		}
251
252	+
253	+
254	+
255	+	#-----------------------------------------------------------------------
256	+	# send_udp_packet
257	+	# Sends a UDP packet to an i-scream filter.
258	+	# The packet contains XML markup describing some of the machine's state.
259	+	# Receipt of UDP packets is not guaranteed.
260	+	#-----------------------------------------------------------------------
261		sub send_udp_packet() {
262
263		my(@statgrab) = `./statgrab.pl`;
264		my(%packet);
265	<	for (my($i) = 0; $i < $#statgrab; $i++) {
265	>	for (my($i) = 0; $i <= $#statgrab; $i++) {
266		$statgrab[$i] =~ /^([^\s]*) (.*)$/;
267		$packet{$1} = $2;
268		}
#	Line 167 | Line 272 | sub send_udp_packet() {
272		my($disk_info) = "<disk>";
273		my($i) = 0;
274		while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
275	<	$disk_info .= "<p$i>";
276	<	$disk_info .= qq/<name>$packet{"packet.disk.p$i.attributes.name"}<\/name>/;
277	<	$disk_info .= qq/<kbytes>$packet{"packet.disk.p$i.attributes.kbytes"}<\/kbytes>/;
278	<	$disk_info .= qq/<used>$packet{"packet.disk.p$i.attributes.used"}<\/used>/;
279	<	$disk_info .= qq/<avail>$packet{"packet.disk.p$i.attributes.avail"}<\/avail>/;
280	<	$disk_info .= qq/<mount>$packet{"packet.disk.p$i.attributes.mount"}<\/mount>/;
281	<	$disk_info .= "</p$i>";
275	>	$disk_info .= "<p$i";
276	>	$disk_info .= " name=\"" . $packet{"packet.disk.p$i.attributes.name"} . "\"";
277	>	$disk_info .= " kbytes=\"" . $packet{"packet.disk.p$i.attributes.kbytes"} . "\"";
278	>	$disk_info .= " used=\"" . $packet{"packet.disk.p$i.attributes.used"} . "\"";
279	>	$disk_info .= " avail=\"" . $packet{"packet.disk.p$i.attributes.avail"} . "\"";
280	>	$disk_info .= " mount=\"" . $packet{"packet.disk.p$i.attributes.mount"} . "\"";
281	>	$disk_info .= "></p$i>";
282		++$i;
283		}
284		$disk_info .= "</disk>";
285
286	<	my($hostname) = hostname();
287	<	$hostname =~ s/\..*$//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');
286	>	my($ip);
287	>	$ip = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost') or $ip = 'localhost';
288
289		# Build the XML packet this way, as we can clearly
290		# see the structure and contents... I like this ;-)
291	+	# [Note that the server rejects UDP packets that are
292	+	# larger than 8196 bytes]
293		my($xml) = <<EOF;
294
295	<	<packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
295	>	<packet seq_no="$seq_no" machine_name="$fqdn" date="$date" type="data" ip="$ip">
296		<load>
297		<load1>$packet{"packet.load.load1"}</load1>
298		<load5>$packet{"packet.load.load5"}</load5>
#	Line 201 | Line 304 | sub send_udp_packet() {
304		<platform>$packet{"packet.os.platform"}</platform>
305		<sysname>$packet{"packet.os.sysname"}</sysname>
306		<version>$packet{"packet.os.version"}</version>
307	+	<uptime>$packet{"packet.os.uptime"}</uptime>
308		</os>
309		<users>
310		<count>$packet{"packet.users.count"}</count>
#	Line 221 | Line 325 | sub send_udp_packet() {
325		<swap>$packet{"packet.cpu.swap"}</swap>
326		</cpu>
327		<memory>
328	<	<total>$packet{"packet.memory.real"}</total>
328	>	<total>$packet{"packet.memory.total"}</total>
329		<free>$packet{"packet.memory.free"}</free>
330		</memory>
331		<swap>
332	<	<total>$packet{"packet.memory.swap_total"}</total>
333	<	<free>$packet{"packet.memory.swap_free"}</free>
332	>	<total>$packet{"packet.swap.total"}</total>
333	>	<free>$packet{"packet.swap.free"}</free>
334		</swap>
335		$disk_info
336		</packet>
337
338		EOF
339
340	+	# Make the packet smaller by stripping out newlines and leading spaces.
341		$xml =~ s/\n\s*//g;
342	<
342	>
343		my($sock) = new IO::Socket::INET (
344		PeerPort => $udp_port,
345		PeerAddr => $filter_addr,
346		Proto => 'udp'
347	<	) or die "Socket: $!\n";
347	>	) or die "Could not send UDP: $!\n";
348
349		print $sock $xml or die "Could not send UDP packet: $!\n";
350		close($sock);
351		$seq_no++;
352		print "-";
353	+
354	+	return;
355		}
356
357	+
358	+
359	+
360	+	#-----------------------------------------------------------------------
361	+	# send_tcp_heartbeat
362	+	# Establishes a TCP connection to an i-scream filter.
363	+	# The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
364	+	# If we need to reconfigure, then we complete the heartbeat before
365	+	# doing so.
366	+	#-----------------------------------------------------------------------
367		sub send_tcp_heartbeat() {
368
369	+	my ($doReconfigure) = 0;
370	+
371		my($sock) = new IO::Socket::INET(
372		PeerAddr => $filter_addr,
373		PeerPort => $tcp_port,
374		Proto => 'tcp'
375	<	) or die "Could not perform heartbeat via TCP: $!\n";
375	>	) or return;
376	>	if (!defined $sock) {
377	>	print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
378	>	&tcp_configure();
379	>	return;
380	>	}
381
258	–	die "Could not connect to the i-scream filter: $!\n" unless $sock;
259	–
382		# Now run through the configuration process.
383		my($response);
384
385		print $sock "HEARTBEAT\n";
386		$response = <$sock>;
387	<	chop $response;
266	<	if (!$response eq "OK") {
387	>	if (!$response eq "OK\n") {
388		close($sock);
389		print "Server gave wrong response to HEARTBEAT: $response\n";
390	+	&tcp_configure();
391		return;
392		}
393
394		print $sock "CONFIG\n";
395		$response = <$sock>;
396	<	chop $response;
275	<	if (!$response eq "OK") {
396	>	if (!$response eq "OK\n") {
397		close($sock);
398		print "Server gave wrong response to CONFIG: $response\n";
399	+	&tcp_configure();
400		return;
401		}
402
403		print $sock "$file_list\n";
404		$response = <$sock>;
405	<	chop $response;
284	<	if (!$response eq "OK") {
405	>	if (!$response eq "OK\n") {
406		close($sock);
407		print "Server gave wrong response to file list: $response\n";
408	+	&tcp_configure();
409		return;
410		}
411
412		print $sock "$last_modified\n";
413		$response = <$sock>;
414	<	chop $response;
293	<	if ($response eq "ERROR") {
414	>	if ($response eq "ERROR\n") {
415		close($sock);
416	<	&tcp_configure();
417	<	return;
416	>	print "Server configuration changed.  Reconfiguring with filter manager.\n";
417	>	$doReconfigure = 1;
418		}
419	<	if (!$response eq "OK") {
419	>	if (!$response eq "OK\n") {
420		close($sock);
421		print "Server gave wrong response to HEARTBEAT: $response\n";
422	+	&tcp_configure();
423		return;
424		}
425
426		print $sock "ENDHEARTBEAT\n";
427		$response = <$sock>;
428	<	chop $response;
307	<	if (!$response eq "OK") {
428	>	if (!$response eq "OK\n") {
429		close($sock);
430		print "Server gave wrong response to ENDHEARTBEAT: $response\n";
431	+	&tcp_configure();
432		return;
433		}
434
435		close($sock);
436		print "^";
437	+
438	+	&tcp_configure() if $doReconfigure;
439	+
440	+	return;
441	+	}
442	+
443	+	#-----------------------------------------------------------------------
444	+	# write_pid
445	+	# Writes the PID (process ID) of this instance to $pidfile.
446	+	# This is then used by a seperate script to check (and restart) ihost.
447	+	#-----------------------------------------------------------------------
448	+	sub write_pid() {
449	+	open PID, ">$pidfile";
450	+	print PID $$;
451	+	close PID;
452	+
453	+	return;
454		}

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