ViewVC Help
View File | Revision Log | Show Annotations | Revision Graph | Root Listing
root/i-scream/projects/cms/source/host/ihost-perl/ihost.pl
(Generate patch)

Comparing projects/cms/source/host/ihost-perl/ihost.pl (file contents):
Revision 1.10 by tdb, Thu Feb 1 03:17:32 2001 UTC vs.
Revision 1.40 by tdb, Mon Nov 19 22:31:18 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 + $pidfile = "/var/tmp/ihost.pid";
51 + &write_pid();
52 +
53   &tcp_configure();
54   &send_udp_packet();
55  
# Line 66 | Line 74 | while (1) {
74      else {
75          $delay = $next_tcp;
76      }
77 <    `sleep $delay`;
77 >    sleep $delay;
78   }
79  
80 + # we'll probably never get here...
81 + `rm -f $pidfile`;
82   exit(0);
83  
84 +
85 + #-----------------------------------------------------------------------
86 + # wait_then_retry
87 + # Waits for the period of time specified in $retry_wait, then attempts
88 + # to reconfigure with the server.
89 + #-----------------------------------------------------------------------
90 + sub wait_then_retry() {
91 +    print "Will retry configuration with filter manager in $retry_wait seconds.\n";
92 +    sleep $retry_wait;
93 + }
94 +
95 +
96 + #-----------------------------------------------------------------------
97 + # tcp_configure
98 + # Establishes a TCP connection to the specified i-scream filter manager.
99 + # The host then requests details from the server, such as the intervals
100 + # at which to send UDP packets.
101 + #-----------------------------------------------------------------------
102   sub tcp_configure() {
103      
104 <    my($sock) = new IO::Socket::INET(
105 <                                     PeerAddr => $filter_manager_addr,
106 <                                     PeerPort => $filter_manager_port,
107 <                                     Proto => 'tcp'
108 <                                    ) or die "Could not perform configuration via TCP: $!\n";
104 >    while (1) {
105 >        my($sock) = new IO::Socket::INET(
106 >                                         PeerAddr => $filter_manager_addr,
107 >                                         PeerPort => $filter_manager_port,
108 >                                         Proto => 'tcp'
109 >                                        ) or die "Cannot connect!";
110 >        if (!defined $sock) {
111 >            print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
112 >            print "Please check that there is an i-scream server at this address.\n";
113 >            wait_then_retry();
114 >            next;
115 >        }
116  
117 <    die "Could not connect to the i-scream filter manager: $!\n" unless $sock;
118 <
84 <    # Now run through the configuration process.
85 <    my($response);
117 >        # Now run through the configuration process...
118 >        my($response);
119      
120 <    print $sock "STARTCONFIG\n";
121 <    $response = <$sock>;
122 <    if (!chop $response eq "OK") {
123 <        print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
124 <        exit(1);
125 <    }
120 >        print $sock "STARTCONFIG\n";
121 >        $response = <$sock>;
122 >        if ($response && !($response eq "OK\n")) {
123 >            print "The i-scream server rejected the STARTCONFIG command.\n";
124 >            close($sock);
125 >            wait_then_retry();
126 >            next;
127 >        }
128  
129 <    print "Config started okay.\n";
129 >        print "Config started okay.\n";
130      
131 <    print $sock "LASTMODIFIED\n";
132 <    $response = <$sock>;
133 <    chop $response;
134 <    $last_modified = $response;
131 >        print $sock "LASTMODIFIED\n";
132 >        $response = <$sock>;
133 >        if (!$response) {
134 >            print "The i-scream server did not return anything for the LASTMODIFIED command.\n";
135 >            close($sock);
136 >            wait_then_retry();
137 >            next;
138 >        }
139 >        chop $response;
140 >        $last_modified = $response;
141      
142 <    print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
142 >        print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
143  
144 <    print $sock "FILELIST\n";
145 <    $response = <$sock>;
146 <    chop $response;
147 <    $file_list = $response;
144 >        print $sock "FILELIST\n";
145 >        $response = <$sock>;
146 >        if (!$response) {
147 >            print "The i-scream server did not provide a configuration file list.\n";
148 >            close($sock);
149 >            wait_then_retry();
150 >            next;
151 >        }
152 >        chop $response;
153 >        $file_list = $response;
154  
155 <    print "File list obtained: $file_list\n";
155 >        print "File list obtained: $file_list\n";
156  
157 <    print $sock "UDPUpdateTime\n";
158 <    $response = <$sock>;
159 <    chop $response;
160 <    $udp_update_time = $response;
157 >        print $sock "FQDN\n";
158 >        $response = <$sock>;
159 >        if (!$response) {
160 >            print "The i-scream server did not tell us our FQDN.\n";
161 >            close($sock);
162 >            wait_then_retry();
163 >            next;
164 >        }
165 >        chop $response;
166 >        $fqdn = $response;
167  
168 <    print $sock "TCPUpdateTime\n";
169 <    $response = <$sock>;
170 <    chop $response;
171 <    $tcp_update_time = $response;
168 >        print "FQDN returned: $fqdn\n";
169 >
170 >        print $sock "UDPUpdateTime\n";
171 >        $response = <$sock>;
172 >        if (!$response) {
173 >            print "The i-scream server did not give us a UDPUpdateTime.\n";
174 >            close($sock);
175 >            wait_then_retry();
176 >            next;
177 >        }
178 >        chop $response;
179 >        $udp_update_time = $response;
180 >
181 >        print $sock "TCPUpdateTime\n";
182 >        $response = <$sock>;
183 >        if (!$response) {
184 >            print "The i-scream server did not give us a TCPUpdateTime.\n";
185 >            close($sock);
186 >            wait_then_retry();
187 >            next;
188 >        }
189 >        chop $response;
190 >        $tcp_update_time = $response;
191      
192 <    print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
192 >        print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
193  
194 <    print $sock "ENDCONFIG\n";
195 <    $response = <$sock>;
196 <    chomp $response;
197 <    if (!$response eq "OK") {
198 <        print "ENDCONFIG command to server failed.  Terminated.\n";
199 <        exit(1);
200 <    }
194 >        print $sock "ENDCONFIG\n";
195 >        $response = <$sock>;
196 >        if ($response && !($response eq "OK\n")) {
197 >            print "ENDCONFIG command to server failed.  Terminated.\n";
198 >            close($sock);
199 >            wait_then_retry();
200 >            next;
201 >        }
202  
203 <    print "Config ended.\n";
203 >        print "Config ended.\n";
204      
205 <    print $sock "FILTER\n";
206 <    $response = <$sock>;
207 <    chop $response;
208 <    $response =~ /(.*);(.*);(.*)/;
209 <    ($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
205 >        print $sock "FILTER\n";
206 >        $response = <$sock>;
207 >        if (!$response) {
208 >            print "Failed: Could not get a filter address from the filter manager.\n";
209 >            close($sock);
210 >            wait_then_retry();
211 >            next;
212 >        }
213 >        chop $response;
214 >        $response =~ /^(.*);(.*);(.*)/;
215 >        if ($response eq "ERROR") {
216 >            print "There are no active configured filters for your host.\n";
217 >            close($sock);
218 >            wait_then_retry();
219 >            next;
220 >        }
221 >        ($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
222 >        unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
223 >            print "Failed: Filter address response from server did not make sense: $response\n";
224 >            close($sock);
225 >            wait_then_retry();
226 >            next;
227 >        }
228      
229 <    print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
229 >        print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
230  
231 <    print $sock "END\n";
232 <    $response = <$sock>;
233 <    chop $response;
234 <    if ($response eq "OK") {
235 <        print "Host successfully configured via TCP.\n"
236 <    }
237 <    else {
238 <        print "The server failed the host configuration on the END command.";
239 <        exit(1);
240 <    }
231 >        print $sock "END\n";
232 >        $response = <$sock>;
233 >        if ($response && ($response eq "OK\n")) {
234 >            print "Host successfully configured via TCP.\n"
235 >        }
236 >        else {
237 >            print "The server failed the host configuration on the END command.\n";
238 >            close($sock);
239 >            wait_then_retry();
240 >            next;
241 >        }
242      
243 <    close($sock);
243 >        close($sock);
244  
245 <    print "Configuration finished sucessfully!\n";
245 >        print "Configuration finished sucessfully!\n";
246 >        last;
247 >    }
248 >    return;
249   }
250  
251 +
252 + #-----------------------------------------------------------------------
253 + # send_udp_packet
254 + # Sends a UDP packet to an i-scream filter.
255 + # The packet contains XML markup describing some of the machine's state.
256 + # Receipt of UDP packets is not guaranteed.
257 + #-----------------------------------------------------------------------
258   sub send_udp_packet() {
259  
260 <    my(@statgrab) = `./statgrab.pl`;
261 <    my(%packet);
262 <    for (my($i) = 0; $i < $#statgrab; $i++) {
263 <        $statgrab[$i] =~ /^([^\s]*) (.*)$/;
264 <        $packet{$1} = $2;
260 >    my($plugins_dir) = "plugins";
261 >    
262 >    opendir PLUGINS, $plugins_dir;
263 >    my(@plugins) = readdir PLUGINS;
264 >    foreach my $plugin (@plugins) {
265 >        push @data, `$plugins_dir/$plugin` if -x "$plugins_dir/$plugin" && -f "$plugins_dir/$plugin";
266      }
267      
268 +    # get some extra data
269      my($date) = time;
270 +    my($ip);
271 +    $ip = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost') or $ip = 'localhost';
272      
273 <    my($disk_info) = "<disk>";
274 <    my($i) = 0;
275 <    while (defined $packet{"packet.disk.p$i.attributes.mount"}) {
276 <        $disk_info .= "<p$i>";
277 <        $disk_info .= qq/<name>$packet{"packet.disk.p$i.attributes.name"}<\/name>/;
278 <        $disk_info .= qq/<kbytes>$packet{"packet.disk.p$i.attributes.kbytes"}<\/kbytes>/;
173 <        $disk_info .= qq/<used>$packet{"packet.disk.p$i.attributes.used"}<\/used>/;
174 <        $disk_info .= qq/<avail>$packet{"packet.disk.p$i.attributes.avail"}<\/avail>/;
175 <        $disk_info .= qq/<mount>$packet{"packet.disk.p$i.attributes.mount"}<\/mount>/;
176 <        $disk_info .= "</p$i>";
177 <        ++$i;
178 <    }
179 <    $disk_info .= "</disk>";
180 <
181 <    my($hostname) = hostname();
182 <    $hostname =~ s/\..*$//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');
187 <
188 <    # Build the XML packet this way, as we can clearly
189 <    # see the structure and contents... I like this ;-)
190 <    my($xml) = <<EOF;
273 >    # add some extra data to the array
274 >    push(@data, "packet.attributes.seq_no=$seq_no");
275 >    push(@data, "packet.attributes.machine_name=$fqdn");
276 >    push(@data, "packet.attributes.date=$date");
277 >    push(@data, "packet.attributes.type=data");
278 >    push(@data, "packet.attributes.ip=$ip");
279      
280 < <packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
281 <    <load>
194 <        <load1>$packet{"packet.load.load1"}</load1>
195 <        <load5>$packet{"packet.load.load5"}</load5>
196 <        <load15>$packet{"packet.load.load15"}</load15>
197 <    </load>
198 <    <os>
199 <        <name>$packet{"packet.os.name"}</name>
200 <        <release>$packet{"packet.os.release"}</release>
201 <        <platform>$packet{"packet.os.platform"}</platform>
202 <        <sysname>$packet{"packet.os.sysname"}</sysname>
203 <        <version>$packet{"packet.os.version"}</version>
204 <        <uptime>$packet{"packet.os.uptime"}</uptime>
205 <    </os>
206 <    <users>
207 <        <count>$packet{"packet.users.count"}</count>
208 <        <list>$packet{"packet.users.list"}</list>
209 <    </users>
210 <    <processes>
211 <        <total>$packet{"packet.processes.total"}</total>
212 <        <sleeping>$packet{"packet.processes.sleeping"}</sleeping>
213 <        <zombie>$packet{"packet.processes.zombie"}</zombie>
214 <        <stopped>$packet{"packet.processes.stopped"}</stopped>
215 <        <cpu>$packet{"packet.processes.cpu"}</cpu>
216 <    </processes>
217 <    <cpu>
218 <        <idle>$packet{"packet.cpu.idle"}</idle>
219 <        <user>$packet{"packet.cpu.user"}</user>
220 <        <kernel>$packet{"packet.cpu.kernel"}</kernel>
221 <        <iowait>$packet{"packet.cpu.iowait"}</iowait>
222 <        <swap>$packet{"packet.cpu.swap"}</swap>
223 <    </cpu>
224 <    <memory>
225 <        <total>$packet{"packet.memory.real"}</total>
226 <        <free>$packet{"packet.memory.free"}</free>
227 <    </memory>
228 <    <swap>
229 <        <total>$packet{"packet.memory.swap_total"}</total>
230 <        <free>$packet{"packet.memory.swap_free"}</free>
231 <    </swap>
232 <    $disk_info
233 < </packet>
234 <
235 < EOF
236 <
237 <    $xml =~ s/\n\s*//g;
280 >    # sort the data
281 >    @data = sort(@data);
282      
283 +    # turn the array into some nice XML
284 +    my($xml) = &make_xml("", "");
285 +    
286      my($sock) = new IO::Socket::INET (
287                                        PeerPort => $udp_port,
288                                        PeerAddr => $filter_addr,
289                                        Proto => 'udp'
290 <                                     ) or die "Socket: $!\n";
291 <
290 >                                     ) or die "Could not send UDP: $!\n";
291 >    
292      print $sock $xml or die "Could not send UDP packet: $!\n";
293      close($sock);
294      $seq_no++;
295      print "-";
296 +    
297 +    return;
298   }
299  
300 +
301 + #-----------------------------------------------------------------------
302 + # send_tcp_heartbeat
303 + # Establishes a TCP connection to an i-scream filter.
304 + # The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
305 + # If we need to reconfigure, then we complete the heartbeat before
306 + # doing so.
307 + #-----------------------------------------------------------------------
308   sub send_tcp_heartbeat() {
309  
310 +    my ($doReconfigure) = 0;
311 +
312      my($sock) = new IO::Socket::INET(
313                                       PeerAddr => $filter_addr,
314                                       PeerPort => $tcp_port,
315                                       Proto => 'tcp'
316 <                                    ) or die "Could not perform heartbeat via TCP: $!\n";
316 >                                    ) or return;
317 >    if (!defined $sock) {
318 >        print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
319 >        &tcp_configure();
320 >        return;
321 >    }
322  
259    die "Could not connect to the i-scream filter: $!\n" unless $sock;
260
323      # Now run through the configuration process.
324      my($response);
325  
326      print $sock "HEARTBEAT\n";
327      $response = <$sock>;
328 <    chop $response;
267 <    if (!$response eq "OK") {
328 >    if (!$response eq "OK\n") {
329          close($sock);
330          print "Server gave wrong response to HEARTBEAT: $response\n";
331 +        &tcp_configure();
332          return;
333      }
334      
335      print $sock "CONFIG\n";
336      $response = <$sock>;
337 <    chop $response;
276 <    if (!$response eq "OK") {
337 >    if (!$response eq "OK\n") {
338          close($sock);
339          print "Server gave wrong response to CONFIG: $response\n";
340 +        &tcp_configure();
341          return;
342      }
343  
344      print $sock "$file_list\n";
345      $response = <$sock>;
346 <    chop $response;
285 <    if (!$response eq "OK") {
346 >    if (!$response eq "OK\n") {
347          close($sock);
348          print "Server gave wrong response to file list: $response\n";
349 +        &tcp_configure();
350          return;
351      }
352      
353      print $sock "$last_modified\n";
354      $response = <$sock>;
355 <    chop $response;
294 <    if ($response eq "ERROR") {
355 >    if ($response eq "ERROR\n") {
356          close($sock);
357 <        &tcp_configure();
358 <        return;
357 >        print "Server configuration changed.  Reconfiguring with filter manager.\n";
358 >        $doReconfigure = 1;
359      }
360 <    if (!$response eq "OK") {
360 >    if (!$response eq "OK\n") {
361          close($sock);
362          print "Server gave wrong response to HEARTBEAT: $response\n";
363 +        &tcp_configure();
364          return;
365      }
366      
367      print $sock "ENDHEARTBEAT\n";
368      $response = <$sock>;
369 <    chop $response;
308 <    if (!$response eq "OK") {
369 >    if (!$response eq "OK\n") {
370          close($sock);
371          print "Server gave wrong response to ENDHEARTBEAT: $response\n";
372 +        &tcp_configure();
373          return;
374      }
375      
376      close($sock);
377      print "^";
378 +    
379 +    &tcp_configure() if $doReconfigure;
380 +    
381 +    return;
382 + }
383 +
384 +
385 + #-----------------------------------------------------------------------
386 + # write_pid
387 + # Writes the PID (process ID) of this instance to $pidfile.
388 + # This is then used by a seperate script to check (and restart) ihost.
389 + #-----------------------------------------------------------------------
390 + sub write_pid() {
391 +    open PID, ">$pidfile";
392 +    print PID $$;
393 +    close PID;
394 +    
395 +    return;
396 + }
397 +
398 + #-----------------------------------------------------------------------
399 + # make_xml
400 + # Turns an array of plugins data into an XML string.
401 + #-----------------------------------------------------------------------
402 + sub make_xml() {
403 +    my($curlevel, $curline) = @_;
404 +    my($xmltemp) = ""; my($curtag) = ""; my($attributes) = "";
405 +    while(1) {
406 +        $curline = shift(@data) if $curline eq ""; chomp $curline;
407 +        if($curline =~ /^$curlevel([^\.\s]+\.)/) {
408 +            $curtag=$1;
409 +        }
410 +        if($curline =~ /^$curlevel$curtag([^\.\s]+)\s+(.*)$/) {
411 +            $xmltemp .= "<$1$attributes>$2</$1>";
412 +        }
413 +        elsif($curline =~ /^$curlevel$curtag(attributes)\.([^\.=]+)=(.*)$/) {
414 +            $attributes .= " $2=\"$3\"";
415 +        }
416 +        else {
417 +            $xmltemp .= &make_xml("$curlevel$curtag", $curline);
418 +        }
419 +        my($nextline) = $data[0]; chomp $nextline if defined $nextline;
420 +        $curtag =~ s/(.*)\./$1/;                
421 +        if((defined $nextline) && ($nextline =~ /^$curlevel$curtag\./)) {
422 +            $curline = "";
423 +        }
424 +        else {
425 +            $xmltemp = "<$curtag$attributes>$xmltemp</$curtag>" unless $curtag eq "";
426 +            return $xmltemp;
427 +        }
428 +    }
429   }

Diff Legend

Removed lines
+ Added lines
< Changed lines
> Changed lines