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Comparing projects/cms/source/host/ihost-perl/ihost.pl (file contents):
Revision 1.6 by pjm2, Fri Jan 26 17:47:18 2001 UTC vs.
Revision 1.28 by pjm2, Wed Mar 14 18:48:33 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 = 6;
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	>	close($sock);
115	>	wait_then_retry();
116	>	next;
117	>	}
118
119	<	die "Could not connect to the i-scream filter manager: $!\n" unless $sock;
120	<
74	<	# Now run through the configuration process.
75	<	my($response);
119	>	# Now run through the configuration process...
120	>	my($response);
121
122	<	print $sock "STARTCONFIG\n";
123	<	$response = <$sock>;
124	<	if (!chop $response eq "OK") {
125	<	print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
126	<	exit(1);
127	<	}
122	>	print $sock "STARTCONFIG\n";
123	>	$response = <$sock>;
124	>	if (!chop $response eq "OK") {
125	>	print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
126	>	close($sock);
127	>	wait_then_retry();
128	>	next;
129	>	}
130
131	<	print "Config started okay.\n";
131	>	print "Config started okay.\n";
132
133	<	print $sock "LASTMODIFIED\n";
134	<	$response = <$sock>;
135	<	chop $response;
136	<	$last_modified = $response;
133	>	print $sock "LASTMODIFIED\n";
134	>	$response = <$sock>;
135	>	chop $response;
136	>	$last_modified = $response;
137
138	<	print "Config last modified: ". scalar localtime $last_modified . "\n";
138	>	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
139
140	<	print $sock "FILELIST\n";
141	<	$response = <$sock>;
142	<	chop $response;
143	<	$file_list = $response;
140	>	print $sock "FILELIST\n";
141	>	$response = <$sock>;
142	>	chop $response;
143	>	$file_list = $response;
144
145	<	print "File list obtained: $file_list\n";
145	>	print "File list obtained: $file_list\n";
146
147	<	print $sock "UDPUpdateTime\n";
148	<	$response = <$sock>;
149	<	chop $response;
150	<	$udp_update_time = $response;
147	>	print $sock "FQDN\n";
148	>	$response = <$sock>;
149	>	chop $response;
150	>	$fqdn = $response;
151
152	<	print $sock "TCPUpdateTime\n";
153	<	$response = <$sock>;
154	<	chop $response;
155	<	$tcp_update_time = $response;
152	>	print "FQDN returned: $fqdn\n";
153	>
154	>	print $sock "UDPUpdateTime\n";
155	>	$response = <$sock>;
156	>	chop $response;
157	>	$udp_update_time = $response;
158	>
159	>	print $sock "TCPUpdateTime\n";
160	>	$response = <$sock>;
161	>	chop $response;
162	>	$tcp_update_time = $response;
163
164	<	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time.\n";
164	>	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
165
166	<	print $sock "ENDCONFIG\n";
167	<	$response = <$sock>;
168	<	chomp $response;
169	<	if (!$response eq "OK") {
170	<	print "ENDCONFIG command to server failed.  Terminated.\n";
171	<	exit(1);
172	<	}
166	>	print $sock "ENDCONFIG\n";
167	>	$response = <$sock>;
168	>	chomp $response;
169	>	if (!$response eq "OK") {
170	>	print "ENDCONFIG command to server failed.  Terminated.\n";
171	>	close($sock);
172	>	wait_then_retry();
173	>	next;
174	>	}
175
176	<	print "Config ended.\n";
176	>	print "Config ended.\n";
177
178	<	print $sock "FILTER\n";
179	<	$response = <$sock>;
180	<	chop $response;
181	<	$response =~ /(.*);(.*);(.*)/;
182	<	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
178	>	print $sock "FILTER\n";
179	>	$response = <$sock>;
180	>	unless (defined($response)) {
181	>	print "Failed: Could not get a filter address from the filter manager.\n";
182	>	close($sock);
183	>	wait_then_retry();
184	>	next;
185	>	}
186	>	chop $response;
187	>	$response =~ /(.*);(.*);(.*)/;
188	>	if ($response eq "ERROR") {
189	>	print "There are no active configured filters for your host.\n";
190	>	close($sock);
191	>	wait_then_retry();
192	>	next;
193	>	}
194	>	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
195	>	unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
196	>	print "Failed: Filter address response from server did not make sense: $response\n";
197	>	close($sock);
198	>	wait_then_retry();
199	>	next;
200	>	}
201
202	<	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
202	>	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
203
204	<	print $sock "END\n";
205	<	$response = <$sock>;
206	<	chop $response;
207	<	if ($response eq "OK") {
208	<	print "Host successfully configured via TCP.\n"
209	<	}
210	<	else {
211	<	print "The server failed the host configuration on the END command.";
212	<	exit(1);
213	<	}
204	>	print $sock "END\n";
205	>	$response = <$sock>;
206	>	chop $response;
207	>	if ($response eq "OK") {
208	>	print "Host successfully configured via TCP.\n"
209	>	}
210	>	else {
211	>	print "The server failed the host configuration on the END command.";
212	>	close($sock);
213	>	wait_then_retry();
214	>	next;
215	>	}
216
217	<	close($sock);
217	>	close($sock);
218
219	<	print "Configuration finished sucessfully!\n";
219	>	print "Configuration finished sucessfully!\n";
220	>	last;
221	>	}
222	>	return;
223		}
224
225	+
226	+
227	+
228	+	#-----------------------------------------------------------------------
229	+	# send_udp_packet
230	+	# Sends a UDP packet to an i-scream filter.
231	+	# The packet contains XML markup describing some of the machine's state.
232	+	# Receipt of UDP packets is not guaranteed.
233	+	#-----------------------------------------------------------------------
234		sub send_udp_packet() {
235
236		my(@statgrab) = `./statgrab.pl`;
237		my(%packet);
238	<	for (my($i) = 0; $i < $#statgrab; $i++) {
238	>	for (my($i) = 0; $i <= $#statgrab; $i++) {
239		$statgrab[$i] =~ /^([^\s]*) (.*)$/;
240		$packet{$1} = $2;
241		}
#	Line 157 | Line 245 | sub send_udp_packet() {
245		my($disk_info) = "<disk>";
246		my($i) = 0;
247		while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
248	<	$disk_info .= "<p$i>";
249	<	$disk_info .= qq/<name>$packet{"packet.disk.p$i.attributes.name"}<\/name>/;
250	<	$disk_info .= qq/<kbytes>$packet{"packet.disk.p$i.attributes.kbytes"}<\/kbytes>/;
251	<	$disk_info .= qq/<used>$packet{"packet.disk.p$i.attributes.used"}<\/used>/;
252	<	$disk_info .= qq/<avail>$packet{"packet.disk.p$i.attributes.avail"}<\/avail>/;
253	<	$disk_info .= qq/<mount>$packet{"packet.disk.p$i.attributes.mount"}<\/mount>/;
254	<	$disk_info .= "</p$i>";
248	>	$disk_info .= "<p$i";
249	>	$disk_info .= " name=\"" . $packet{"packet.disk.p$i.attributes.name"} . "\"";
250	>	$disk_info .= " kbytes=\"" . $packet{"packet.disk.p$i.attributes.kbytes"} . "\"";
251	>	$disk_info .= " used=\"" . $packet{"packet.disk.p$i.attributes.used"} . "\"";
252	>	$disk_info .= " avail=\"" . $packet{"packet.disk.p$i.attributes.avail"} . "\"";
253	>	$disk_info .= " mount=\"" . $packet{"packet.disk.p$i.attributes.mount"} . "\"";
254	>	$disk_info .= "></p$i>";
255		++$i;
256		}
257		$disk_info .= "</disk>";
258
259	<	my($hostname) = hostname();
172	<	$hostname =~ s/\..*$//g;
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');
259	>	my($ip) = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost');
260
261		# Build the XML packet this way, as we can clearly
262		# see the structure and contents... I like this ;-)
263	+	# [Note that the server rejects UDP packets that are
264	+	# larger than 8196 bytes]
265		my($xml) = <<EOF;
266
267	<	<packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
267	>	<packet seq_no="$seq_no" machine_name="$fqdn" date="$date" type="data" ip="$ip">
268		<load>
269		<load1>$packet{"packet.load.load1"}</load1>
270		<load5>$packet{"packet.load.load5"}</load5>
#	Line 191 | Line 276 | sub send_udp_packet() {
276		<platform>$packet{"packet.os.platform"}</platform>
277		<sysname>$packet{"packet.os.sysname"}</sysname>
278		<version>$packet{"packet.os.version"}</version>
279	+	<uptime>$packet{"packet.os.uptime"}</uptime>
280		</os>
281		<users>
282		<count>$packet{"packet.users.count"}</count>
#	Line 211 | Line 297 | sub send_udp_packet() {
297		<swap>$packet{"packet.cpu.swap"}</swap>
298		</cpu>
299		<memory>
300	<	<total>$packet{"packet.memory.real"}</total>
300	>	<total>$packet{"packet.memory.total"}</total>
301		<free>$packet{"packet.memory.free"}</free>
302		</memory>
303		<swap>
304	<	<total>$packet{"packet.memory.swap_total"}</total>
305	<	<free>$packet{"packet.memory.swap_free"}</free>
304	>	<total>$packet{"packet.swap.total"}</total>
305	>	<free>$packet{"packet.swap.free"}</free>
306		</swap>
307		$disk_info
308		</packet>
309
310		EOF
311
312	+	# Make the packet smaller by stripping out newlines and leading spaces.
313		$xml =~ s/\n\s*//g;
314	<
314	>
315		my($sock) = new IO::Socket::INET (
316		PeerPort => $udp_port,
317		PeerAddr => $filter_addr,
318		Proto => 'udp'
319	<	) or die "Socket: $!\n";
319	>	) or die "Could not send UDP: $!\n";
320
321		print $sock $xml or die "Could not send UDP packet: $!\n";
322		close($sock);
323		$seq_no++;
324		print "-";
325	+
326	+	return;
327		}
328
329	+
330	+
331	+
332	+	#-----------------------------------------------------------------------
333	+	# send_tcp_heartbeat
334	+	# Establishes a TCP connection to an i-scream filter.
335	+	# The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
336	+	#-----------------------------------------------------------------------
337		sub send_tcp_heartbeat() {
338
339		my($sock) = new IO::Socket::INET(
340		PeerAddr => $filter_addr,
341		PeerPort => $tcp_port,
342		Proto => 'tcp'
343	<	) or die "Could not perform heartbeat via TCP: $!\n";
343	>	) or return;
344	>	if (!defined $sock) {
345	>	print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
346	>	&tcp_configure();
347	>	return;
348	>	}
349
248	–	die "Could not connect to the i-scream filter: $!\n" unless $sock;
249	–
350		# Now run through the configuration process.
351		my($response);
352
353		print $sock "HEARTBEAT\n";
354		$response = <$sock>;
355	+	return if (!defined $response);
356		chop $response;
357		if (!$response eq "OK") {
358		close($sock);
359		print "Server gave wrong response to HEARTBEAT: $response\n";
360	+	&tcp_configure();
361		return;
362		}
363
364		print $sock "CONFIG\n";
365		$response = <$sock>;
366	+	return if (!defined $response);
367		chop $response;
368		if (!$response eq "OK") {
369		close($sock);
370		print "Server gave wrong response to CONFIG: $response\n";
371	+	&tcp_configure();
372		return;
373		}
374
375		print $sock "$file_list\n";
376		$response = <$sock>;
377	+	return if (!defined $response);
378		chop $response;
379		if (!$response eq "OK") {
380		close($sock);
381		print "Server gave wrong response to file list: $response\n";
382	+	&tcp_configure();
383		return;
384		}
385
386		print $sock "$last_modified\n";
387		$response = <$sock>;
388	+	return if (!defined $response);
389		chop $response;
390		if ($response eq "ERROR") {
391		close($sock);
392	+	print "Server configuration changed.  Reconfiguring with filter manager.\n";
393		&tcp_configure();
394		return;
395		}
396		if (!$response eq "OK") {
397		close($sock);
398		print "Server gave wrong response to HEARTBEAT: $response\n";
399	+	&tcp_configure();
400		return;
401		}
402
403		print $sock "ENDHEARTBEAT\n";
404		$response = <$sock>;
405	+	return if (!defined $response);
406		chop $response;
407		if (!$response eq "OK") {
408		close($sock);
409		print "Server gave wrong response to ENDHEARTBEAT: $response\n";
410	+	&tcp_configure();
411		return;
412		}
413
414		close($sock);
415		print "^";
416	+
417	+	return;
418	+	}
419	+
420	+	#-----------------------------------------------------------------------
421	+	# write_pid
422	+	# Writes the PID (process ID) of this instance to $pidfile.
423	+	# This is then used by a seperate script to check (and restart) ihost.
424	+	#-----------------------------------------------------------------------
425	+	sub write_pid() {
426	+	open PID, ">$pidfile";
427	+	print PID $$;
428	+	close PID;
429	+
430	+	return;
431		}

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