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Comparing projects/cms/source/host/ihost-perl/ihost.pl (file contents):
Revision 1.8 by pjm2, Mon Jan 29 09:19:16 2001 UTC vs.
Revision 1.42 by tdb, Wed Nov 21 10:08:20 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
8 < # methods as you see fit.
9 < #  - pjm2@ukc.ac.uk
8 > # a typical Unix/Linux box.
9   #
10   # $Author$
11   # $Id$
# Line 31 | Line 30 | use vars qw (
30               $tcp_port
31               $filter_addr
32               $file_list
33 +             $fqdn
34 +             $pidfile
35 +             $retry_wait
36 +             @data
37              );
38  
39   if (@ARGV != 2) {
# Line 41 | Line 44 | $filter_manager_addr = $ARGV[0];
44   $filter_manager_port = $ARGV[1];
45  
46   $seq_no = 1;
47 + $retry_wait = 60;
48  
49 + # write our PID to a file
50 + # use home dir by default
51 + #$pidfile = $ENV{"HOME"};
52 + # or drop it in /var/tmp if we can't find HOME
53 + $pidfile = "/var/tmp" if not defined $pidfile;
54 + $pidfile .= "/.ihost.pid";
55 + &write_pid();
56 +
57   &tcp_configure();
58   &send_udp_packet();
59  
60   $last_udp_time = time;
61   $last_tcp_time = time;
62   while (1) {
63 <    if (time >= $last_udp_time + $udp_update_time) {
63 >    my($time) = time;
64 >    if ($time >= $last_udp_time + $udp_update_time) {
65          &send_udp_packet();
66 <        $last_udp_time = time;
66 >        $last_udp_time = $time;
67      }
68 <    if (time >= $last_tcp_time + $tcp_update_time) {
68 >    if ($time >= $last_tcp_time + $tcp_update_time) {
69          &send_tcp_heartbeat();
70 <        $last_tcp_time = time;
70 >        $last_tcp_time = $time;
71      }
72 <    `sleep 1`;
72 >    my($next_udp) = $udp_update_time - $time + $last_udp_time;
73 >    my($next_tcp) = $tcp_update_time - $time + $last_tcp_time;
74 >    my($delay);
75 >    if ($next_udp < $next_tcp) {
76 >        $delay = $next_udp
77 >    }
78 >    else {
79 >        $delay = $next_tcp;
80 >    }
81 >    sleep $delay;
82   }
83  
84 + # we'll probably never get here...
85 + `rm -f $pidfile`;
86   exit(0);
87  
88 +
89 + #-----------------------------------------------------------------------
90 + # wait_then_retry
91 + # Waits for the period of time specified in $retry_wait, then attempts
92 + # to reconfigure with the server.
93 + #-----------------------------------------------------------------------
94 + sub wait_then_retry() {
95 +    print "Will retry configuration with filter manager in $retry_wait seconds.\n";
96 +    sleep $retry_wait;
97 + }
98 +
99 +
100 + #-----------------------------------------------------------------------
101 + # tcp_configure
102 + # Establishes a TCP connection to the specified i-scream filter manager.
103 + # The host then requests details from the server, such as the intervals
104 + # at which to send UDP packets.
105 + #-----------------------------------------------------------------------
106   sub tcp_configure() {
107      
108 <    my($sock) = new IO::Socket::INET(
109 <                                     PeerAddr => $filter_manager_addr,
110 <                                     PeerPort => $filter_manager_port,
111 <                                     Proto => 'tcp'
112 <                                    ) or die "Could not perform configuration via TCP: $!\n";
108 >    while (1) {
109 >        my($sock) = new IO::Socket::INET(
110 >                                         PeerAddr => $filter_manager_addr,
111 >                                         PeerPort => $filter_manager_port,
112 >                                         Proto => 'tcp'
113 >                                        ) or die "Cannot connect!";
114 >        if (!defined $sock) {
115 >            print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
116 >            print "Please check that there is an i-scream server at this address.\n";
117 >            wait_then_retry();
118 >            next;
119 >        }
120  
121 <    die "Could not connect to the i-scream filter manager: $!\n" unless $sock;
122 <
74 <    # Now run through the configuration process.
75 <    my($response);
121 >        # Now run through the configuration process...
122 >        my($response);
123      
124 <    print $sock "STARTCONFIG\n";
125 <    $response = <$sock>;
126 <    if (!chop $response eq "OK") {
127 <        print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
128 <        exit(1);
129 <    }
124 >        print $sock "STARTCONFIG\n";
125 >        $response = <$sock>;
126 >        if ($response && !($response eq "OK\n")) {
127 >            print "The i-scream server rejected the STARTCONFIG command.\n";
128 >            close($sock);
129 >            wait_then_retry();
130 >            next;
131 >        }
132  
133 <    print "Config started okay.\n";
133 >        print "Config started okay.\n";
134      
135 <    print $sock "LASTMODIFIED\n";
136 <    $response = <$sock>;
137 <    chop $response;
138 <    $last_modified = $response;
135 >        print $sock "LASTMODIFIED\n";
136 >        $response = <$sock>;
137 >        if (!$response) {
138 >            print "The i-scream server did not return anything for the LASTMODIFIED command.\n";
139 >            close($sock);
140 >            wait_then_retry();
141 >            next;
142 >        }
143 >        chop $response;
144 >        $last_modified = $response;
145      
146 <    print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
146 >        print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
147  
148 <    print $sock "FILELIST\n";
149 <    $response = <$sock>;
150 <    chop $response;
151 <    $file_list = $response;
148 >        print $sock "FILELIST\n";
149 >        $response = <$sock>;
150 >        if (!$response) {
151 >            print "The i-scream server did not provide a configuration file list.\n";
152 >            close($sock);
153 >            wait_then_retry();
154 >            next;
155 >        }
156 >        chop $response;
157 >        $file_list = $response;
158  
159 <    print "File list obtained: $file_list\n";
159 >        print "File list obtained: $file_list\n";
160  
161 <    print $sock "UDPUpdateTime\n";
162 <    $response = <$sock>;
163 <    chop $response;
164 <    $udp_update_time = $response;
161 >        print $sock "FQDN\n";
162 >        $response = <$sock>;
163 >        if (!$response) {
164 >            print "The i-scream server did not tell us our FQDN.\n";
165 >            close($sock);
166 >            wait_then_retry();
167 >            next;
168 >        }
169 >        chop $response;
170 >        $fqdn = $response;
171  
172 <    print $sock "TCPUpdateTime\n";
173 <    $response = <$sock>;
174 <    chop $response;
175 <    $tcp_update_time = $response;
172 >        print "FQDN returned: $fqdn\n";
173 >
174 >        print $sock "UDPUpdateTime\n";
175 >        $response = <$sock>;
176 >        if (!$response) {
177 >            print "The i-scream server did not give us a UDPUpdateTime.\n";
178 >            close($sock);
179 >            wait_then_retry();
180 >            next;
181 >        }
182 >        chop $response;
183 >        $udp_update_time = $response;
184 >
185 >        print $sock "TCPUpdateTime\n";
186 >        $response = <$sock>;
187 >        if (!$response) {
188 >            print "The i-scream server did not give us a TCPUpdateTime.\n";
189 >            close($sock);
190 >            wait_then_retry();
191 >            next;
192 >        }
193 >        chop $response;
194 >        $tcp_update_time = $response;
195      
196 <    print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
196 >        print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
197  
198 <    print $sock "ENDCONFIG\n";
199 <    $response = <$sock>;
200 <    chomp $response;
201 <    if (!$response eq "OK") {
202 <        print "ENDCONFIG command to server failed.  Terminated.\n";
203 <        exit(1);
204 <    }
198 >        print $sock "ENDCONFIG\n";
199 >        $response = <$sock>;
200 >        if ($response && !($response eq "OK\n")) {
201 >            print "ENDCONFIG command to server failed.  Terminated.\n";
202 >            close($sock);
203 >            wait_then_retry();
204 >            next;
205 >        }
206  
207 <    print "Config ended.\n";
207 >        print "Config ended.\n";
208      
209 <    print $sock "FILTER\n";
210 <    $response = <$sock>;
211 <    chop $response;
212 <    $response =~ /(.*);(.*);(.*)/;
213 <    ($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
209 >        print $sock "FILTER\n";
210 >        $response = <$sock>;
211 >        if (!$response) {
212 >            print "Failed: Could not get a filter address from the filter manager.\n";
213 >            close($sock);
214 >            wait_then_retry();
215 >            next;
216 >        }
217 >        chop $response;
218 >        $response =~ /^(.*);(.*);(.*)/;
219 >        if ($response eq "ERROR") {
220 >            print "There are no active configured filters for your host.\n";
221 >            close($sock);
222 >            wait_then_retry();
223 >            next;
224 >        }
225 >        ($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
226 >        unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
227 >            print "Failed: Filter address response from server did not make sense: $response\n";
228 >            close($sock);
229 >            wait_then_retry();
230 >            next;
231 >        }
232      
233 <    print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
233 >        print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
234  
235 <    print $sock "END\n";
236 <    $response = <$sock>;
237 <    chop $response;
238 <    if ($response eq "OK") {
239 <        print "Host successfully configured via TCP.\n"
240 <    }
241 <    else {
242 <        print "The server failed the host configuration on the END command.";
243 <        exit(1);
244 <    }
235 >        print $sock "END\n";
236 >        $response = <$sock>;
237 >        if ($response && ($response eq "OK\n")) {
238 >            print "Host successfully configured via TCP.\n"
239 >        }
240 >        else {
241 >            print "The server failed the host configuration on the END command.\n";
242 >            close($sock);
243 >            wait_then_retry();
244 >            next;
245 >        }
246      
247 <    close($sock);
247 >        close($sock);
248  
249 <    print "Configuration finished sucessfully!\n";
249 >        print "Configuration finished sucessfully!\n";
250 >        last;
251 >    }
252 >    return;
253   }
254  
255 +
256 + #-----------------------------------------------------------------------
257 + # send_udp_packet
258 + # Sends a UDP packet to an i-scream filter.
259 + # The packet contains XML markup describing some of the machine's state.
260 + # Receipt of UDP packets is not guaranteed.
261 + #-----------------------------------------------------------------------
262   sub send_udp_packet() {
263  
264 <    my(@statgrab) = `./statgrab.pl`;
265 <    my(%packet);
266 <    for (my($i) = 0; $i < $#statgrab; $i++) {
267 <        $statgrab[$i] =~ /^([^\s]*) (.*)$/;
268 <        $packet{$1} = $2;
264 >    my($plugins_dir) = "plugins";
265 >    
266 >    opendir PLUGINS, $plugins_dir;
267 >    my(@plugins) = readdir PLUGINS;
268 >    foreach my $plugin (@plugins) {
269 >        push @data, `$plugins_dir/$plugin` if -x "$plugins_dir/$plugin" && -f "$plugins_dir/$plugin";
270      }
271      
272 +    # get some extra data
273      my($date) = time;
274 +    my($ip);
275 +    $ip = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost') or $ip = 'localhost';
276      
277 <    my($disk_info) = "<disk>";
278 <    my($i) = 0;
279 <    while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
280 <        $disk_info .= "<p$i>";
281 <        $disk_info .= qq/<name>$packet{"packet.disk.p$i.attributes.name"}<\/name>/;
282 <        $disk_info .= qq/<kbytes>$packet{"packet.disk.p$i.attributes.kbytes"}<\/kbytes>/;
163 <        $disk_info .= qq/<used>$packet{"packet.disk.p$i.attributes.used"}<\/used>/;
164 <        $disk_info .= qq/<avail>$packet{"packet.disk.p$i.attributes.avail"}<\/avail>/;
165 <        $disk_info .= qq/<mount>$packet{"packet.disk.p$i.attributes.mount"}<\/mount>/;
166 <        $disk_info .= "</p$i>";
167 <        ++$i;
168 <    }
169 <    $disk_info .= "</disk>";
170 <
171 <    my($hostname) = hostname();
172 <    $hostname =~ s/\..*$//g;
173 <    `cat /etc/resolv.conf` =~ /domain\s+([^\s]+)/;
174 <    my($domainname) = $1;
175 <    my($machine_name) = "$hostname.$domainname";
176 <    my($ip) = inet_ntoa(scalar(gethostbyname($hostname)) || 'localhost');
177 <
178 <    # Build the XML packet this way, as we can clearly
179 <    # see the structure and contents... I like this ;-)
180 <    my($xml) = <<EOF;
277 >    # add some extra data to the array
278 >    push(@data, "packet.attributes.seq_no=$seq_no");
279 >    push(@data, "packet.attributes.machine_name=$fqdn");
280 >    push(@data, "packet.attributes.date=$date");
281 >    push(@data, "packet.attributes.type=data");
282 >    push(@data, "packet.attributes.ip=$ip");
283      
284 < <packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
285 <    <load>
184 <        <load1>$packet{"packet.load.load1"}</load1>
185 <        <load5>$packet{"packet.load.load5"}</load5>
186 <        <load15>$packet{"packet.load.load15"}</load15>
187 <    </load>
188 <    <os>
189 <        <name>$packet{"packet.os.name"}</name>
190 <        <release>$packet{"packet.os.release"}</release>
191 <        <platform>$packet{"packet.os.platform"}</platform>
192 <        <sysname>$packet{"packet.os.sysname"}</sysname>
193 <        <version>$packet{"packet.os.version"}</version>
194 <    </os>
195 <    <users>
196 <        <count>$packet{"packet.users.count"}</count>
197 <        <list>$packet{"packet.users.list"}</list>
198 <    </users>
199 <    <processes>
200 <        <total>$packet{"packet.processes.total"}</total>
201 <        <sleeping>$packet{"packet.processes.sleeping"}</sleeping>
202 <        <zombie>$packet{"packet.processes.zombie"}</zombie>
203 <        <stopped>$packet{"packet.processes.stopped"}</stopped>
204 <        <cpu>$packet{"packet.processes.cpu"}</cpu>
205 <    </processes>
206 <    <cpu>
207 <        <idle>$packet{"packet.cpu.idle"}</idle>
208 <        <user>$packet{"packet.cpu.user"}</user>
209 <        <kernel>$packet{"packet.cpu.kernel"}</kernel>
210 <        <iowait>$packet{"packet.cpu.iowait"}</iowait>
211 <        <swap>$packet{"packet.cpu.swap"}</swap>
212 <    </cpu>
213 <    <memory>
214 <        <total>$packet{"packet.memory.real"}</total>
215 <        <free>$packet{"packet.memory.free"}</free>
216 <    </memory>
217 <    <swap>
218 <        <total>$packet{"packet.memory.swap_total"}</total>
219 <        <free>$packet{"packet.memory.swap_free"}</free>
220 <    </swap>
221 <    $disk_info
222 < </packet>
223 <
224 < EOF
225 <
226 <    $xml =~ s/\n\s*//g;
284 >    # sort the data
285 >    @data = sort(@data);
286      
287 +    # turn the array into some nice XML
288 +    my($xml) = &make_xml("", "");
289 +    
290      my($sock) = new IO::Socket::INET (
291                                        PeerPort => $udp_port,
292                                        PeerAddr => $filter_addr,
293                                        Proto => 'udp'
294 <                                     ) or die "Socket: $!\n";
295 <
294 >                                     ) or die "Could not send UDP: $!\n";
295 >    
296      print $sock $xml or die "Could not send UDP packet: $!\n";
297      close($sock);
298      $seq_no++;
299      print "-";
300 +    
301 +    return;
302   }
303  
304 +
305 + #-----------------------------------------------------------------------
306 + # send_tcp_heartbeat
307 + # Establishes a TCP connection to an i-scream filter.
308 + # The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
309 + # If we need to reconfigure, then we complete the heartbeat before
310 + # doing so.
311 + #-----------------------------------------------------------------------
312   sub send_tcp_heartbeat() {
313  
314 +    my ($doReconfigure) = 0;
315 +
316      my($sock) = new IO::Socket::INET(
317                                       PeerAddr => $filter_addr,
318                                       PeerPort => $tcp_port,
319                                       Proto => 'tcp'
320 <                                    ) or die "Could not perform heartbeat via TCP: $!\n";
320 >                                    ) or return;
321 >    if (!defined $sock) {
322 >        print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
323 >        &tcp_configure();
324 >        return;
325 >    }
326  
248    die "Could not connect to the i-scream filter: $!\n" unless $sock;
249
327      # Now run through the configuration process.
328      my($response);
329  
330      print $sock "HEARTBEAT\n";
331      $response = <$sock>;
332 <    chop $response;
256 <    if (!$response eq "OK") {
332 >    if (!$response eq "OK\n") {
333          close($sock);
334          print "Server gave wrong response to HEARTBEAT: $response\n";
335 +        &tcp_configure();
336          return;
337      }
338      
339      print $sock "CONFIG\n";
340      $response = <$sock>;
341 <    chop $response;
265 <    if (!$response eq "OK") {
341 >    if (!$response eq "OK\n") {
342          close($sock);
343          print "Server gave wrong response to CONFIG: $response\n";
344 +        &tcp_configure();
345          return;
346      }
347  
348      print $sock "$file_list\n";
349      $response = <$sock>;
350 <    chop $response;
274 <    if (!$response eq "OK") {
350 >    if (!$response eq "OK\n") {
351          close($sock);
352          print "Server gave wrong response to file list: $response\n";
353 +        &tcp_configure();
354          return;
355      }
356      
357      print $sock "$last_modified\n";
358      $response = <$sock>;
359 <    chop $response;
283 <    if ($response eq "ERROR") {
359 >    if ($response eq "ERROR\n") {
360          close($sock);
361 <        &tcp_configure();
362 <        return;
361 >        print "Server configuration changed.  Reconfiguring with filter manager.\n";
362 >        $doReconfigure = 1;
363      }
364 <    if (!$response eq "OK") {
364 >    if (!$response eq "OK\n") {
365          close($sock);
366          print "Server gave wrong response to HEARTBEAT: $response\n";
367 +        &tcp_configure();
368          return;
369      }
370      
371      print $sock "ENDHEARTBEAT\n";
372      $response = <$sock>;
373 <    chop $response;
297 <    if (!$response eq "OK") {
373 >    if (!$response eq "OK\n") {
374          close($sock);
375          print "Server gave wrong response to ENDHEARTBEAT: $response\n";
376 +        &tcp_configure();
377          return;
378      }
379      
380      close($sock);
381      print "^";
382 +    
383 +    &tcp_configure() if $doReconfigure;
384 +    
385 +    return;
386 + }
387 +
388 +
389 + #-----------------------------------------------------------------------
390 + # write_pid
391 + # Writes the PID (process ID) of this instance to $pidfile.
392 + # This is then used by a seperate script to check (and restart) ihost.
393 + #-----------------------------------------------------------------------
394 + sub write_pid() {
395 +    open PID, ">$pidfile";
396 +    print PID $$;
397 +    close PID;
398 +    
399 +    return;
400 + }
401 +
402 + #-----------------------------------------------------------------------
403 + # make_xml
404 + # Turns an array of plugins data into an XML string.
405 + #-----------------------------------------------------------------------
406 + sub make_xml() {
407 +    my($curlevel, $curline) = @_;
408 +    my($xmltemp) = ""; my($curtag) = ""; my($attributes) = "";
409 +    while(1) {
410 +        $curline = shift(@data) if $curline eq ""; chomp $curline;
411 +        if($curline =~ /^$curlevel([^\.\s]+\.)/) {
412 +            $curtag=$1;
413 +        }
414 +        if($curline =~ /^$curlevel$curtag([^\.\s]+)\s+(.*)$/) {
415 +            $xmltemp .= "<$1$attributes>$2</$1>";
416 +        }
417 +        elsif($curline =~ /^$curlevel$curtag(attributes)\.([^\.=]+)=(.*)$/) {
418 +            $attributes .= " $2=\"$3\"";
419 +        }
420 +        else {
421 +            $xmltemp .= &make_xml("$curlevel$curtag", $curline);
422 +        }
423 +        my($nextline) = $data[0]; chomp $nextline if defined $nextline;
424 +        $curtag =~ s/(.*)\./$1/;                
425 +        if((defined $nextline) && ($nextline =~ /^$curlevel$curtag\./)) {
426 +            $curline = "";
427 +        }
428 +        else {
429 +            $xmltemp = "<$curtag$attributes>$xmltemp</$curtag>" unless $curtag eq "";
430 +            return $xmltemp;
431 +        }
432 +    }
433   }

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