host/ihost-perl/ihost.pl

#!/usr/bin/perl -w

# -----------------------------------------------------------
# Perl i-scream Host.
#
# 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: tdb1 $
# $Id: ihost.pl,v 1.10 2001/02/01 03:17:32 tdb1 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
            );

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);

sub tcp_configure() {
    
    my($sock) = new IO::Socket::INET(
                                     PeerAddr => $filter_manager_addr,
                                     PeerPort => $filter_manager_port,
                                     Proto => 'tcp'
                                    );
    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 "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";
}

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>";
        $disk_info .= qq/<name>$packet{"packet.disk.p$i.attributes.name"}<\/name>/;
        $disk_info .= qq/<kbytes>$packet{"packet.disk.p$i.attributes.kbytes"}<\/kbytes>/;
        $disk_info .= qq/<used>$packet{"packet.disk.p$i.attributes.used"}<\/used>/;
        $disk_info .= qq/<avail>$packet{"packet.disk.p$i.attributes.avail"}<\/avail>/;
        $disk_info .= qq/<mount>$packet{"packet.disk.p$i.attributes.mount"}<\/mount>/;
        $disk_info .= "</p$i>";
        ++$i;
    }
    $disk_info .= "</disk>";

    my($hostname) = hostname();
    $hostname =~ s/\..*$//g;
    `cat /etc/resolv.conf` =~ /domain\s+([^\s]+)/;
    my($domainname) = $1;
    my($machine_name) = "$hostname.$domainname";
    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 ;-)
    my($xml) = <<EOF;
    
<packet seq_no="$seq_no" machine_name="$machine_name" 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.real"}</total>
        <free>$packet{"packet.memory.free"}</free>
    </memory>
    <swap>
        <total>$packet{"packet.memory.swap_total"}</total>
        <free>$packet{"packet.memory.swap_free"}</free>
    </swap>
    $disk_info
</packet>

EOF

    $xml =~ s/\n\s*//g;
    
    my($sock) = new IO::Socket::INET (
                                      PeerPort => $udp_port,
                                      PeerAddr => $filter_addr,
                                      Proto => 'udp'
                                     ) or die "Socket: $!\n";

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

sub send_tcp_heartbeat() {

    my($sock) = new IO::Socket::INET(
                                     PeerAddr => $filter_addr,
                                     PeerPort => $tcp_port,
                                     Proto => 'tcp'
                                    );
    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>;
    chop $response;
    if (!$response eq "OK") {
        close($sock);
        print "Server gave wrong response to HEARTBEAT: $response\n";
        return;
    }
    
    print $sock "CONFIG\n";
    $response = <$sock>;
    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>;
    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>;
    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>;
    chop $response;
    if (!$response eq "OK") {
        close($sock);
        print "Server gave wrong response to ENDHEARTBEAT: $response\n";
        return;
    }
    
    close($sock);
    print "^";
}
Revision:	1.11
Committed:	Thu Feb 1 09:10:52 2001 UTC (23 years, 9 months ago) by pjm2
Content type:	text/plain
Branch:	MAIN
Changes since 1.10:	+14 -8 lines
Log Message:	If the server 'disappears', then the ihost host will carry on running until it is once again able to deliver TCP heartbeats.
#	User	Rev	Content
1	pjm2	1.6	#!/usr/bin/perl -w
2	pjm2	1.1
3			# -----------------------------------------------------------
4			# Perl i-scream Host.
5			#
6			# An all-in-one script to act as an i-scream host on
7			# a typical Unix/Linux box. You may adapt the data-gathering
8			# methods as you see fit.
9			# - pjm2@ukc.ac.uk
10			#
11	pjm2	1.11	# $Author: tdb1 $
12			# $Id: ihost.pl,v 1.10 2001/02/01 03:17:32 tdb1 Exp $
13	pjm2	1.1	#------------------------------------------------------------
14
15			$\| = 1;
16
17			use strict;
18			use IO::Socket;
19			use Sys::Hostname;
20
21			use vars qw (
22			$filter_manager_addr
23			$filter_manager_port
24			$seq_no
25			$udp_update_time
26			$tcp_update_time
27			$last_udp_time
28			$last_tcp_time
29			$last_modified
30			$udp_port
31			$tcp_port
32			$filter_addr
33			$file_list
34			);
35
36			if (@ARGV != 2) {
37			die "Usage: ihost.pl [i-scream filter manager] [TCP port]\n";
38			}
39
40			$filter_manager_addr = $ARGV[0];
41			$filter_manager_port = $ARGV[1];
42
43			$seq_no = 1;
44
45			&tcp_configure();
46			&send_udp_packet();
47
48			$last_udp_time = time;
49			$last_tcp_time = time;
50			while (1) {
51	pjm2	1.9	my($time) = time;
52			if ($time >= $last_udp_time + $udp_update_time) {
53	pjm2	1.1	&send_udp_packet();
54	pjm2	1.9	$last_udp_time = $time;
55	pjm2	1.1	}
56	pjm2	1.9	if ($time >= $last_tcp_time + $tcp_update_time) {
57	pjm2	1.1	&send_tcp_heartbeat();
58	pjm2	1.9	$last_tcp_time = $time;
59	pjm2	1.1	}
60	pjm2	1.9	my($next_udp) = $udp_update_time - $time + $last_udp_time;
61			my($next_tcp) = $tcp_update_time - $time + $last_tcp_time;
62			my($delay);
63			if ($next_udp < $next_tcp) {
64			$delay = $next_udp
65			}
66			else {
67			$delay = $next_tcp;
68			}
69			`sleep $delay`;
70	pjm2	1.1	}
71
72			exit(0);
73
74			sub tcp_configure() {
75
76			my($sock) = new IO::Socket::INET(
77			PeerAddr => $filter_manager_addr,
78			PeerPort => $filter_manager_port,
79			Proto => 'tcp'
80	pjm2	1.11	);
81			if (!defined $sock) {
82			print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
83			print "Please check that there is an i-scream server at this address.\n";
84			print "Program ended.\n";
85			exit(1);
86			}
87	pjm2	1.1
88			# Now run through the configuration process.
89			my($response);
90
91			print $sock "STARTCONFIG\n";
92			$response = <$sock>;
93			if (!chop $response eq "OK") {
94			print "The i-scream server rejected the STARTCONFIG command. Terminated.";
95			exit(1);
96			}
97
98			print "Config started okay.\n";
99
100			print $sock "LASTMODIFIED\n";
101			$response = <$sock>;
102			chop $response;
103			$last_modified = $response;
104
105	pjm2	1.7	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
106	pjm2	1.1
107			print $sock "FILELIST\n";
108			$response = <$sock>;
109			chop $response;
110			$file_list = $response;
111
112			print "File list obtained: $file_list\n";
113
114			print $sock "UDPUpdateTime\n";
115			$response = <$sock>;
116			chop $response;
117			$udp_update_time = $response;
118
119			print $sock "TCPUpdateTime\n";
120			$response = <$sock>;
121			chop $response;
122			$tcp_update_time = $response;
123
124	pjm2	1.7	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
125	pjm2	1.1
126			print $sock "ENDCONFIG\n";
127			$response = <$sock>;
128			chomp $response;
129			if (!$response eq "OK") {
130			print "ENDCONFIG command to server failed. Terminated.\n";
131			exit(1);
132			}
133
134			print "Config ended.\n";
135
136			print $sock "FILTER\n";
137			$response = <$sock>;
138			chop $response;
139			$response =~ /(.);(.);(.*)/;
140			($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
141
142			print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
143
144			print $sock "END\n";
145			$response = <$sock>;
146			chop $response;
147			if ($response eq "OK") {
148			print "Host successfully configured via TCP.\n"
149			}
150			else {
151			print "The server failed the host configuration on the END command.";
152			exit(1);
153			}
154
155			close($sock);
156
157			print "Configuration finished sucessfully!\n";
158			}
159
160			sub send_udp_packet() {
161
162			my(@statgrab) = `./statgrab.pl`;
163			my(%packet);
164			for (my($i) = 0; $i < $#statgrab; $i++) {
165			$statgrab[$i] =~ /^([^\s]) (.)$/;
166			$packet{$1} = $2;
167			}
168
169			my($date) = time;
170
171			my($disk_info) = "<disk>";
172			my($i) = 0;
173			while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
174			$disk_info .= "<p$i>";
175			$disk_info .= qq/<name>$packet{"packet.disk.p$i.attributes.name"}<\/name>/;
176			$disk_info .= qq/<kbytes>$packet{"packet.disk.p$i.attributes.kbytes"}<\/kbytes>/;
177			$disk_info .= qq/<used>$packet{"packet.disk.p$i.attributes.used"}<\/used>/;
178			$disk_info .= qq/<avail>$packet{"packet.disk.p$i.attributes.avail"}<\/avail>/;
179			$disk_info .= qq/<mount>$packet{"packet.disk.p$i.attributes.mount"}<\/mount>/;
180			$disk_info .= "</p$i>";
181			++$i;
182			}
183			$disk_info .= "</disk>";
184
185			my($hostname) = hostname();
186	pjm2	1.4	$hostname =~ s/\..*$//g;
187	pjm2	1.8	`cat /etc/resolv.conf` =~ /domain\s+([^\s]+)/;
188			my($domainname) = $1;
189	pjm2	1.1	my($machine_name) = "$hostname.$domainname";
190			my($ip) = inet_ntoa(scalar(gethostbyname($hostname)) \|\| 'localhost');
191
192			# Build the XML packet this way, as we can clearly
193			# see the structure and contents... I like this ;-)
194			my($xml) = <<EOF;
195
196			<packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
197			<load>
198			<load1>$packet{"packet.load.load1"}</load1>
199			<load5>$packet{"packet.load.load5"}</load5>
200			<load15>$packet{"packet.load.load15"}</load15>
201			</load>
202			<os>
203			<name>$packet{"packet.os.name"}</name>
204			<release>$packet{"packet.os.release"}</release>
205			<platform>$packet{"packet.os.platform"}</platform>
206			<sysname>$packet{"packet.os.sysname"}</sysname>
207			<version>$packet{"packet.os.version"}</version>
208	tdb	1.10	<uptime>$packet{"packet.os.uptime"}</uptime>
209	pjm2	1.1	</os>
210			<users>
211			<count>$packet{"packet.users.count"}</count>
212			<list>$packet{"packet.users.list"}</list>
213			</users>
214			<processes>
215			<total>$packet{"packet.processes.total"}</total>
216			<sleeping>$packet{"packet.processes.sleeping"}</sleeping>
217			<zombie>$packet{"packet.processes.zombie"}</zombie>
218			<stopped>$packet{"packet.processes.stopped"}</stopped>
219			<cpu>$packet{"packet.processes.cpu"}</cpu>
220			</processes>
221			<cpu>
222			<idle>$packet{"packet.cpu.idle"}</idle>
223			<user>$packet{"packet.cpu.user"}</user>
224			<kernel>$packet{"packet.cpu.kernel"}</kernel>
225			<iowait>$packet{"packet.cpu.iowait"}</iowait>
226			<swap>$packet{"packet.cpu.swap"}</swap>
227			</cpu>
228			<memory>
229			<total>$packet{"packet.memory.real"}</total>
230			<free>$packet{"packet.memory.free"}</free>
231			</memory>
232			<swap>
233			<total>$packet{"packet.memory.swap_total"}</total>
234			<free>$packet{"packet.memory.swap_free"}</free>
235			</swap>
236			$disk_info
237			</packet>
238
239			EOF
240
241			$xml =~ s/\n\s*//g;
242
243			my($sock) = new IO::Socket::INET (
244			PeerPort => $udp_port,
245			PeerAddr => $filter_addr,
246			Proto => 'udp'
247			) or die "Socket: $!\n";
248
249			print $sock $xml or die "Could not send UDP packet: $!\n";
250			close($sock);
251			$seq_no++;
252			print "-";
253			}
254
255			sub send_tcp_heartbeat() {
256
257			my($sock) = new IO::Socket::INET(
258			PeerAddr => $filter_addr,
259			PeerPort => $tcp_port,
260			Proto => 'tcp'
261	pjm2	1.11	);
262			if (!defined $sock) {
263			print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
264			return;
265			}
266	pjm2	1.1
267			# Now run through the configuration process.
268			my($response);
269
270			print $sock "HEARTBEAT\n";
271			$response = <$sock>;
272			chop $response;
273			if (!$response eq "OK") {
274			close($sock);
275			print "Server gave wrong response to HEARTBEAT: $response\n";
276			return;
277			}
278
279			print $sock "CONFIG\n";
280			$response = <$sock>;
281			chop $response;
282			if (!$response eq "OK") {
283			close($sock);
284			print "Server gave wrong response to CONFIG: $response\n";
285			return;
286			}
287
288			print $sock "$file_list\n";
289			$response = <$sock>;
290			chop $response;
291			if (!$response eq "OK") {
292			close($sock);
293			print "Server gave wrong response to file list: $response\n";
294			return;
295			}
296
297			print $sock "$last_modified\n";
298			$response = <$sock>;
299			chop $response;
300			if ($response eq "ERROR") {
301			close($sock);
302			&tcp_configure();
303			return;
304			}
305			if (!$response eq "OK") {
306			close($sock);
307			print "Server gave wrong response to HEARTBEAT: $response\n";
308			return;
309			}
310
311			print $sock "ENDHEARTBEAT\n";
312			$response = <$sock>;
313			chop $response;
314			if (!$response eq "OK") {
315			close($sock);
316			print "Server gave wrong response to ENDHEARTBEAT: $response\n";
317			return;
318			}
319
320			close($sock);
321			print "^";
322			}