host/ihost-perl/ihost.pl

#!/usr/bin/perl -w

# -----------------------------------------------------------
# Perl i-scream Host.
# http://www.i-scream.org.uk
#
# An all-in-one script to act as an i-scream host on
# a typical Unix/Linux box.  You may adapt the data-gathering
# methods as you see fit.
#  - pjm2@ukc.ac.uk
#
# $Author: pjm2 $
# $Id: ihost.pl,v 1.22 2001/03/01 10:49:27 pjm2 Exp $
#------------------------------------------------------------

$| = 1;

use strict;
use IO::Socket;
use Sys::Hostname;

use vars qw (
             $filter_manager_addr
             $filter_manager_port
             $seq_no
             $udp_update_time
             $tcp_update_time
             $last_udp_time
             $last_tcp_time
             $last_modified
             $udp_port
             $tcp_port
             $filter_addr
             $file_list
             $fqdn
            );

if (@ARGV != 2) {
    die "Usage: ihost.pl [i-scream filter manager] [TCP port]\n";
}

$filter_manager_addr = $ARGV[0];
$filter_manager_port = $ARGV[1];

$seq_no = 1;

&tcp_configure();
&send_udp_packet();

$last_udp_time = time;
$last_tcp_time = time;
while (1) {
    my($time) = time;
    if ($time >= $last_udp_time + $udp_update_time) {
        &send_udp_packet();
        $last_udp_time = $time;
    }
    if ($time >= $last_tcp_time + $tcp_update_time) {
        &send_tcp_heartbeat();
        $last_tcp_time = $time;
    }
    my($next_udp) = $udp_update_time - $time + $last_udp_time;
    my($next_tcp) = $tcp_update_time - $time + $last_tcp_time;
    my($delay);
    if ($next_udp < $next_tcp) {
        $delay = $next_udp
    }
    else {
        $delay = $next_tcp;
    }
    `sleep $delay`;
}

exit(0);


#-----------------------------------------------------------------------
# tcp_configure
# Establishes a TCP connection to the specified i-scream filter manager.
# The host then requests details from the server, such as the intervals
# at which to send UDP packets.
#-----------------------------------------------------------------------
sub tcp_configure() {
    
    my($sock) = new IO::Socket::INET(
                                     PeerAddr => $filter_manager_addr,
                                     PeerPort => $filter_manager_port,
                                     Proto => 'tcp'
                                    ) or die "Cannot connect!";
    if (!defined $sock) {
        print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
        print "Please check that there is an i-scream server at this address.\n";
        print "Program ended.\n";
        exit(1);
    }

    # Now run through the configuration process...
    my($response);
    
    print $sock "STARTCONFIG\n";
    $response = <$sock>;
    if (!chop $response eq "OK") {
        print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
        exit(1);
    }

    print "Config started okay.\n";
    
    print $sock "LASTMODIFIED\n";
    $response = <$sock>;
    chop $response;
    $last_modified = $response;
    
    print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";

    print $sock "FILELIST\n";
    $response = <$sock>;
    chop $response;
    $file_list = $response;

    print "File list obtained: $file_list\n";

    print $sock "FQDN\n";
    $response = <$sock>;
    chop $response;
    $fqdn = $response;

    print "FQDN returned: $fqdn\n";

    print $sock "UDPUpdateTime\n";
    $response = <$sock>;
    chop $response;
    $udp_update_time = $response;

    print $sock "TCPUpdateTime\n";
    $response = <$sock>;
    chop $response;
    $tcp_update_time = $response;
    
    print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";

    print $sock "ENDCONFIG\n";
    $response = <$sock>;
    chomp $response;
    if (!$response eq "OK") {
        print "ENDCONFIG command to server failed.  Terminated.\n";
        exit(1);
    }

    print "Config ended.\n";
    
    print $sock "FILTER\n";
    $response = <$sock>;
    chop $response;
    $response =~ /(.*);(.*);(.*)/;
    ($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
    
    print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";

    print $sock "END\n";
    $response = <$sock>;
    chop $response;
    if ($response eq "OK") {
        print "Host successfully configured via TCP.\n"
    }
    else {
        print "The server failed the host configuration on the END command.";
        exit(1);
    }
    
    close($sock);

    print "Configuration finished sucessfully!\n";
    
    return;
}


#-----------------------------------------------------------------------
# send_udp_packet
# Sends a UDP packet to an i-scream filter.
# The packet contains XML markup describing some of the machine's state.
# Receipt of UDP packets is not guaranteed.
#-----------------------------------------------------------------------
sub send_udp_packet() {

    my(@statgrab) = `./statgrab.pl`;
    my(%packet);
    for (my($i) = 0; $i <= $#statgrab; $i++) {
        $statgrab[$i] =~ /^([^\s]*) (.*)$/;
        $packet{$1} = $2;
    }
    
    my($date) = time;
    
    my($disk_info) = "<disk>";
    my($i) = 0;
    while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
        $disk_info .= "<p$i";
        $disk_info .= " name=\"" . $packet{"packet.disk.p$i.attributes.name"} . "\"";
        $disk_info .= " kbytes=\"" . $packet{"packet.disk.p$i.attributes.kbytes"} . "\"";
        $disk_info .= " used=\"" . $packet{"packet.disk.p$i.attributes.used"} . "\"";
        $disk_info .= " avail=\"" . $packet{"packet.disk.p$i.attributes.avail"} . "\"";
        $disk_info .= " mount=\"" . $packet{"packet.disk.p$i.attributes.mount"} . "\"";
        $disk_info .= "></p$i>";
        ++$i;
    }
    $disk_info .= "</disk>";

    my($ip) = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost');

    # Build the XML packet this way, as we can clearly
    # see the structure and contents... I like this ;-)
    # [Note that the server rejects UDP packets that are
    # larger than 8196 bytes]
    my($xml) = <<EOF;
    
<packet seq_no="$seq_no" machine_name="$fqdn" date="$date" type="data" ip="$ip">
    <load>
        <load1>$packet{"packet.load.load1"}</load1>
        <load5>$packet{"packet.load.load5"}</load5>
        <load15>$packet{"packet.load.load15"}</load15>
    </load>
    <os>
        <name>$packet{"packet.os.name"}</name>
        <release>$packet{"packet.os.release"}</release>
        <platform>$packet{"packet.os.platform"}</platform>
        <sysname>$packet{"packet.os.sysname"}</sysname>
        <version>$packet{"packet.os.version"}</version>
        <uptime>$packet{"packet.os.uptime"}</uptime>
    </os>
    <users>
        <count>$packet{"packet.users.count"}</count>
        <list>$packet{"packet.users.list"}</list>
    </users>
    <processes>
        <total>$packet{"packet.processes.total"}</total>
        <sleeping>$packet{"packet.processes.sleeping"}</sleeping>
        <zombie>$packet{"packet.processes.zombie"}</zombie>
        <stopped>$packet{"packet.processes.stopped"}</stopped>
        <cpu>$packet{"packet.processes.cpu"}</cpu>
    </processes>
    <cpu>
        <idle>$packet{"packet.cpu.idle"}</idle>
        <user>$packet{"packet.cpu.user"}</user>
        <kernel>$packet{"packet.cpu.kernel"}</kernel>
        <iowait>$packet{"packet.cpu.iowait"}</iowait>
        <swap>$packet{"packet.cpu.swap"}</swap>
    </cpu>
    <memory>
        <total>$packet{"packet.memory.total"}</total>
        <free>$packet{"packet.memory.free"}</free>
    </memory>
    <swap>
        <total>$packet{"packet.swap.total"}</total>
        <free>$packet{"packet.swap.free"}</free>
    </swap>
    $disk_info
</packet>

EOF

    # Make the packet smaller by stripping out newlines and leading spaces.
    $xml =~ s/\n\s*//g;

    my($sock) = new IO::Socket::INET (
                                      PeerPort => $udp_port,
                                      PeerAddr => $filter_addr,
                                      Proto => 'udp'
                                     ) or die "Could not send UDP: $!\n";

    print $sock $xml or die "Could not send UDP packet: $!\n";
    close($sock);
    $seq_no++;
    print "-";
    
    return;
}


#-----------------------------------------------------------------------
# send_tcp_heartbeat
# Establishes a TCP connection to an i-scream filter.
# The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
#-----------------------------------------------------------------------
sub send_tcp_heartbeat() {

    my($sock) = new IO::Socket::INET(
                                     PeerAddr => $filter_addr,
                                     PeerPort => $tcp_port,
                                     Proto => 'tcp'
                                    ) or return;
    if (!defined $sock) {
        print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
        return;
    }

    # Now run through the configuration process.
    my($response);

    print $sock "HEARTBEAT\n";
    $response = <$sock>;
    return if (!defined $response);
    chop $response;
    if (!$response eq "OK") {
        close($sock);
        print "Server gave wrong response to HEARTBEAT: $response\n";
        return;
    }
    
    print $sock "CONFIG\n";
    $response = <$sock>;
    return if (!defined $response);
    chop $response;
    if (!$response eq "OK") {
        close($sock);
        print "Server gave wrong response to CONFIG: $response\n";
        return;
    }

    print $sock "$file_list\n";
    $response = <$sock>;
    return if (!defined $response);
    chop $response;
    if (!$response eq "OK") {
        close($sock);
        print "Server gave wrong response to file list: $response\n";
        return;
    }
    
    print $sock "$last_modified\n";
    $response = <$sock>;
    return if (!defined $response);
    chop $response;
    if ($response eq "ERROR") {
        close($sock);
        &tcp_configure();
        return;
    }
    if (!$response eq "OK") {
        close($sock);
        print "Server gave wrong response to HEARTBEAT: $response\n";
        return;
    }
    
    print $sock "ENDHEARTBEAT\n";
    $response = <$sock>;
    return if (!defined $response);
    chop $response;
    if (!$response eq "OK") {
        close($sock);
        print "Server gave wrong response to ENDHEARTBEAT: $response\n";
        return;
    }
    
    close($sock);
    print "^";
    
    return;
}
Revision:	1.23
Committed:	Thu Mar 1 18:53:42 2001 UTC (23 years, 7 months ago) by pjm2
Content type:	text/plain
Branch:	MAIN
Changes since 1.22:	+11 -6 lines
Log Message:	Changed the way in which the host behaves when the server goes down mid-heartbeat. It shouldn't complain; it will just silently withdraw.
#	Content
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
9	# methods as you see fit.
10	# - pjm2@ukc.ac.uk
11	#
12	# $Author: pjm2 $
13	# $Id: ihost.pl,v 1.22 2001/03/01 10:49:27 pjm2 Exp $
14	#------------------------------------------------------------
15
16	$\| = 1;
17
18	use strict;
19	use IO::Socket;
20	use Sys::Hostname;
21
22	use vars qw (
23	$filter_manager_addr
24	$filter_manager_port
25	$seq_no
26	$udp_update_time
27	$tcp_update_time
28	$last_udp_time
29	$last_tcp_time
30	$last_modified
31	$udp_port
32	$tcp_port
33	$filter_addr
34	$file_list
35	$fqdn
36	);
37
38	if (@ARGV != 2) {
39	die "Usage: ihost.pl [i-scream filter manager] [TCP port]\n";
40	}
41
42	$filter_manager_addr = $ARGV[0];
43	$filter_manager_port = $ARGV[1];
44
45	$seq_no = 1;
46
47	&tcp_configure();
48	&send_udp_packet();
49
50	$last_udp_time = time;
51	$last_tcp_time = time;
52	while (1) {
53	my($time) = time;
54	if ($time >= $last_udp_time + $udp_update_time) {
55	&send_udp_packet();
56	$last_udp_time = $time;
57	}
58	if ($time >= $last_tcp_time + $tcp_update_time) {
59	&send_tcp_heartbeat();
60	$last_tcp_time = $time;
61	}
62	my($next_udp) = $udp_update_time - $time + $last_udp_time;
63	my($next_tcp) = $tcp_update_time - $time + $last_tcp_time;
64	my($delay);
65	if ($next_udp < $next_tcp) {
66	$delay = $next_udp
67	}
68	else {
69	$delay = $next_tcp;
70	}
71	`sleep $delay`;
72	}
73
74	exit(0);
75
76
77	#-----------------------------------------------------------------------
78	# tcp_configure
79	# Establishes a TCP connection to the specified i-scream filter manager.
80	# The host then requests details from the server, such as the intervals
81	# at which to send UDP packets.
82	#-----------------------------------------------------------------------
83	sub tcp_configure() {
84
85	my($sock) = new IO::Socket::INET(
86	PeerAddr => $filter_manager_addr,
87	PeerPort => $filter_manager_port,
88	Proto => 'tcp'
89	) or die "Cannot connect!";
90	if (!defined $sock) {
91	print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
92	print "Please check that there is an i-scream server at this address.\n";
93	print "Program ended.\n";
94	exit(1);
95	}
96
97	# Now run through the configuration process...
98	my($response);
99
100	print $sock "STARTCONFIG\n";
101	$response = <$sock>;
102	if (!chop $response eq "OK") {
103	print "The i-scream server rejected the STARTCONFIG command. Terminated.";
104	exit(1);
105	}
106
107	print "Config started okay.\n";
108
109	print $sock "LASTMODIFIED\n";
110	$response = <$sock>;
111	chop $response;
112	$last_modified = $response;
113
114	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
115
116	print $sock "FILELIST\n";
117	$response = <$sock>;
118	chop $response;
119	$file_list = $response;
120
121	print "File list obtained: $file_list\n";
122
123	print $sock "FQDN\n";
124	$response = <$sock>;
125	chop $response;
126	$fqdn = $response;
127
128	print "FQDN returned: $fqdn\n";
129
130	print $sock "UDPUpdateTime\n";
131	$response = <$sock>;
132	chop $response;
133	$udp_update_time = $response;
134
135	print $sock "TCPUpdateTime\n";
136	$response = <$sock>;
137	chop $response;
138	$tcp_update_time = $response;
139
140	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
141
142	print $sock "ENDCONFIG\n";
143	$response = <$sock>;
144	chomp $response;
145	if (!$response eq "OK") {
146	print "ENDCONFIG command to server failed. Terminated.\n";
147	exit(1);
148	}
149
150	print "Config ended.\n";
151
152	print $sock "FILTER\n";
153	$response = <$sock>;
154	chop $response;
155	$response =~ /(.);(.);(.*)/;
156	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
157
158	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
159
160	print $sock "END\n";
161	$response = <$sock>;
162	chop $response;
163	if ($response eq "OK") {
164	print "Host successfully configured via TCP.\n"
165	}
166	else {
167	print "The server failed the host configuration on the END command.";
168	exit(1);
169	}
170
171	close($sock);
172
173	print "Configuration finished sucessfully!\n";
174
175	return;
176	}
177
178
179
180
181	#-----------------------------------------------------------------------
182	# send_udp_packet
183	# Sends a UDP packet to an i-scream filter.
184	# The packet contains XML markup describing some of the machine's state.
185	# Receipt of UDP packets is not guaranteed.
186	#-----------------------------------------------------------------------
187	sub send_udp_packet() {
188
189	my(@statgrab) = `./statgrab.pl`;
190	my(%packet);
191	for (my($i) = 0; $i <= $#statgrab; $i++) {
192	$statgrab[$i] =~ /^([^\s]) (.)$/;
193	$packet{$1} = $2;
194	}
195
196	my($date) = time;
197
198	my($disk_info) = "<disk>";
199	my($i) = 0;
200	while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
201	$disk_info .= "<p$i";
202	$disk_info .= " name=\"" . $packet{"packet.disk.p$i.attributes.name"} . "\"";
203	$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	$disk_info .= "</disk>";
211
212	my($ip) = inet_ntoa(scalar(gethostbyname(hostname())) \|\| 'localhost');
213
214	# Build the XML packet this way, as we can clearly
215	# see the structure and contents... I like this ;-)
216	# [Note that the server rejects UDP packets that are
217	# larger than 8196 bytes]
218	my($xml) = <<EOF;
219
220	<packet seq_no="$seq_no" machine_name="$fqdn" date="$date" type="data" ip="$ip">
221	<load>
222	<load1>$packet{"packet.load.load1"}</load1>
223	<load5>$packet{"packet.load.load5"}</load5>
224	<load15>$packet{"packet.load.load15"}</load15>
225	</load>
226	<os>
227	<name>$packet{"packet.os.name"}</name>
228	<release>$packet{"packet.os.release"}</release>
229	<platform>$packet{"packet.os.platform"}</platform>
230	<sysname>$packet{"packet.os.sysname"}</sysname>
231	<version>$packet{"packet.os.version"}</version>
232	<uptime>$packet{"packet.os.uptime"}</uptime>
233	</os>
234	<users>
235	<count>$packet{"packet.users.count"}</count>
236	<list>$packet{"packet.users.list"}</list>
237	</users>
238	<processes>
239	<total>$packet{"packet.processes.total"}</total>
240	<sleeping>$packet{"packet.processes.sleeping"}</sleeping>
241	<zombie>$packet{"packet.processes.zombie"}</zombie>
242	<stopped>$packet{"packet.processes.stopped"}</stopped>
243	<cpu>$packet{"packet.processes.cpu"}</cpu>
244	</processes>
245	<cpu>
246	<idle>$packet{"packet.cpu.idle"}</idle>
247	<user>$packet{"packet.cpu.user"}</user>
248	<kernel>$packet{"packet.cpu.kernel"}</kernel>
249	<iowait>$packet{"packet.cpu.iowait"}</iowait>
250	<swap>$packet{"packet.cpu.swap"}</swap>
251	</cpu>
252	<memory>
253	<total>$packet{"packet.memory.total"}</total>
254	<free>$packet{"packet.memory.free"}</free>
255	</memory>
256	<swap>
257	<total>$packet{"packet.swap.total"}</total>
258	<free>$packet{"packet.swap.free"}</free>
259	</swap>
260	$disk_info
261	</packet>
262
263	EOF
264
265	# Make the packet smaller by stripping out newlines and leading spaces.
266	$xml =~ s/\n\s*//g;
267
268	my($sock) = new IO::Socket::INET (
269	PeerPort => $udp_port,
270	PeerAddr => $filter_addr,
271	Proto => 'udp'
272	) or die "Could not send UDP: $!\n";
273
274	print $sock $xml or die "Could not send UDP packet: $!\n";
275	close($sock);
276	$seq_no++;
277	print "-";
278
279	return;
280	}
281
282
283
284
285	#-----------------------------------------------------------------------
286	# send_tcp_heartbeat
287	# Establishes a TCP connection to an i-scream filter.
288	# The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
289	#-----------------------------------------------------------------------
290	sub send_tcp_heartbeat() {
291
292	my($sock) = new IO::Socket::INET(
293	PeerAddr => $filter_addr,
294	PeerPort => $tcp_port,
295	Proto => 'tcp'
296	) or return;
297	if (!defined $sock) {
298	print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
299	return;
300	}
301
302	# Now run through the configuration process.
303	my($response);
304
305	print $sock "HEARTBEAT\n";
306	$response = <$sock>;
307	return if (!defined $response);
308	chop $response;
309	if (!$response eq "OK") {
310	close($sock);
311	print "Server gave wrong response to HEARTBEAT: $response\n";
312	return;
313	}
314
315	print $sock "CONFIG\n";
316	$response = <$sock>;
317	return if (!defined $response);
318	chop $response;
319	if (!$response eq "OK") {
320	close($sock);
321	print "Server gave wrong response to CONFIG: $response\n";
322	return;
323	}
324
325	print $sock "$file_list\n";
326	$response = <$sock>;
327	return if (!defined $response);
328	chop $response;
329	if (!$response eq "OK") {
330	close($sock);
331	print "Server gave wrong response to file list: $response\n";
332	return;
333	}
334
335	print $sock "$last_modified\n";
336	$response = <$sock>;
337	return if (!defined $response);
338	chop $response;
339	if ($response eq "ERROR") {
340	close($sock);
341	&tcp_configure();
342	return;
343	}
344	if (!$response eq "OK") {
345	close($sock);
346	print "Server gave wrong response to HEARTBEAT: $response\n";
347	return;
348	}
349
350	print $sock "ENDHEARTBEAT\n";
351	$response = <$sock>;
352	return if (!defined $response);
353	chop $response;
354	if (!$response eq "OK") {
355	close($sock);
356	print "Server gave wrong response to ENDHEARTBEAT: $response\n";
357	return;
358	}
359
360	close($sock);
361	print "^";
362
363	return;
364	}