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#!/usr/bin/perl -w |
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# |
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# i-scream central monitoring system |
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# Copyright (C) 2000-2002 i-scream |
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# |
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# This program is free software; you can redistribute it and/or |
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# modify it under the terms of the GNU General Public License |
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# as published by the Free Software Foundation; either version 2 |
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# of the License, or (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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# |
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|
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# ----------------------------------------------------------- |
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# Perl i-scream Host. |
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# http://www.i-scream.org.uk |
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# |
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# An all-in-one script to act as an i-scream host on |
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# a typical Unix/Linux box. You may adapt the data-gathering |
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# methods as you see fit. |
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# - pjm2@ukc.ac.uk |
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# a typical Unix/Linux box. |
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# |
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# $Author$ |
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# $Id$ |
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$fqdn |
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$pidfile |
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$retry_wait |
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$ostype |
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$key |
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@data |
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); |
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|
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if (@ARGV != 2) { |
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$filter_manager_port = $ARGV[1]; |
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|
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$seq_no = 1; |
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$retry_wait = 6; |
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$retry_wait = 60; |
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|
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# work out our platform, if we can. |
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$ostype = `uname -s`; |
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chomp $ostype; |
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$ostype = "unknown" if not defined $ostype; |
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|
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# write our PID to a file |
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$pidfile = "/var/tmp/ihost.pid"; |
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# use home dir by default |
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#$pidfile = $ENV{"HOME"}; |
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# or drop it in /var/tmp if we can't find HOME |
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$pidfile = "/var/tmp" if not defined $pidfile; |
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$pidfile .= "/.ihost.pid"; |
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&write_pid(); |
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|
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&tcp_configure(); |
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&send_tcp_heartbeat(); |
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&send_udp_packet(); |
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|
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$last_udp_time = time; |
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else { |
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$delay = $next_tcp; |
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} |
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`sleep $delay`; |
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sleep $delay; |
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} |
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|
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# we'll probably never get here... |
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#----------------------------------------------------------------------- |
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sub wait_then_retry() { |
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print "Will retry configuration with filter manager in $retry_wait seconds.\n"; |
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`sleep $retry_wait`; |
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sleep $retry_wait; |
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} |
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print $sock "LASTMODIFIED\n"; |
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$response = <$sock>; |
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if (!$response) { |
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print "The i-scream server did not return anything for the LASTMODIFIED command.\n"; |
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if (!$response || $response eq "ERROR\n") { |
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print "The i-scream server did not provide the LASTMODIFIED value.\n"; |
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close($sock); |
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wait_then_retry(); |
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next; |
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} |
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chop $response; |
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chomp $response; |
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$last_modified = $response; |
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|
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print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n"; |
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|
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print $sock "FILELIST\n"; |
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$response = <$sock>; |
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if (!$response) { |
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if (!$response || $response eq "ERROR\n") { |
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print "The i-scream server did not provide a configuration file list.\n"; |
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close($sock); |
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wait_then_retry(); |
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next; |
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} |
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chop $response; |
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chomp $response; |
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$file_list = $response; |
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print "File list obtained: $file_list\n"; |
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|
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print $sock "FQDN\n"; |
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$response = <$sock>; |
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if (!$response) { |
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if (!$response || $response eq "ERROR\n") { |
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print "The i-scream server did not tell us our FQDN.\n"; |
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close($sock); |
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wait_then_retry(); |
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next; |
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} |
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chop $response; |
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chomp $response; |
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$fqdn = $response; |
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print "FQDN returned: $fqdn\n"; |
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|
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print $sock "UDPUpdateTime\n"; |
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$response = <$sock>; |
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if (!$response) { |
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if (!$response || $response eq "ERROR\n") { |
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print "The i-scream server did not give us a UDPUpdateTime.\n"; |
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close($sock); |
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wait_then_retry(); |
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next; |
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} |
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chop $response; |
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chomp $response; |
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$udp_update_time = $response; |
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|
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print $sock "TCPUpdateTime\n"; |
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$response = <$sock>; |
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if (!$response) { |
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if (!$response || $response eq "ERROR\n") { |
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print "The i-scream server did not give us a TCPUpdateTime.\n"; |
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close($sock); |
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wait_then_retry(); |
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next; |
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} |
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chop $response; |
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chomp $response; |
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$tcp_update_time = $response; |
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|
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print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n"; |
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wait_then_retry(); |
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next; |
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} |
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chop $response; |
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$response =~ /^(.*);(.*);(.*)/; |
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chomp $response; |
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if ($response eq "ERROR") { |
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print "There are no active configured filters for your host.\n"; |
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close($sock); |
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wait_then_retry(); |
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next; |
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} |
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$response =~ /^(.*);(.*);(.*)/; |
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($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3); |
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unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) { |
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print "Failed: Filter address response from server did not make sense: $response\n"; |
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} |
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|
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|
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– |
|
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– |
|
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#----------------------------------------------------------------------- |
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# send_udp_packet |
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# Sends a UDP packet to an i-scream filter. |
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#----------------------------------------------------------------------- |
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sub send_udp_packet() { |
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|
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my(@statgrab) = `./statgrab.pl`; |
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my(%packet); |
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for (my($i) = 0; $i <= $#statgrab; $i++) { |
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$statgrab[$i] =~ /^([^\s]*) (.*)$/; |
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$packet{$1} = $2; |
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my($plugins_dir) = "plugins"; |
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> |
|
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opendir PLUGINS, $plugins_dir; |
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my(@plugins) = readdir PLUGINS; |
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foreach my $plugin (@plugins) { |
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push @data, `$plugins_dir/$plugin $ostype` if -x "$plugins_dir/$plugin" && -f "$plugins_dir/$plugin"; |
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} |
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|
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# get some extra data |
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my($date) = time; |
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my($ip); |
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$ip = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost') or $ip = 'localhost'; |
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|
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my($disk_info) = "<disk>"; |
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my($i) = 0; |
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< |
while (defined $packet{"packet.disk.p$i.attributes.mount"}) { |
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$disk_info .= "<p$i"; |
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$disk_info .= " name=\"" . $packet{"packet.disk.p$i.attributes.name"} . "\""; |
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< |
$disk_info .= " kbytes=\"" . $packet{"packet.disk.p$i.attributes.kbytes"} . "\""; |
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$disk_info .= " used=\"" . $packet{"packet.disk.p$i.attributes.used"} . "\""; |
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$disk_info .= " avail=\"" . $packet{"packet.disk.p$i.attributes.avail"} . "\""; |
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$disk_info .= " mount=\"" . $packet{"packet.disk.p$i.attributes.mount"} . "\""; |
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< |
$disk_info .= "></p$i>"; |
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++$i; |
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} |
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< |
$disk_info .= "</disk>"; |
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|
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my($ip) = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost'); |
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|
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< |
# Build the XML packet this way, as we can clearly |
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# see the structure and contents... I like this ;-) |
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# [Note that the server rejects UDP packets that are |
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< |
# larger than 8196 bytes] |
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< |
my($xml) = <<EOF; |
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> |
# add some extra data to the array |
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> |
push(@data, "packet.attributes.seq_no $seq_no"); |
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> |
push(@data, "packet.attributes.machine_name $fqdn"); |
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> |
push(@data, "packet.attributes.date $date"); |
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> |
push(@data, "packet.attributes.type data"); |
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> |
push(@data, "packet.attributes.ip $ip"); |
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> |
push(@data, "packet.attributes.key $key"); |
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|
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< |
<packet seq_no="$seq_no" machine_name="$fqdn" date="$date" type="data" ip="$ip"> |
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< |
<load> |
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< |
<load1>$packet{"packet.load.load1"}</load1> |
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< |
<load5>$packet{"packet.load.load5"}</load5> |
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< |
<load15>$packet{"packet.load.load15"}</load15> |
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< |
</load> |
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< |
<os> |
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< |
<name>$packet{"packet.os.name"}</name> |
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< |
<release>$packet{"packet.os.release"}</release> |
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< |
<platform>$packet{"packet.os.platform"}</platform> |
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< |
<sysname>$packet{"packet.os.sysname"}</sysname> |
| 305 |
< |
<version>$packet{"packet.os.version"}</version> |
| 306 |
< |
<uptime>$packet{"packet.os.uptime"}</uptime> |
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< |
</os> |
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< |
<users> |
| 309 |
< |
<count>$packet{"packet.users.count"}</count> |
| 310 |
< |
<list>$packet{"packet.users.list"}</list> |
| 311 |
< |
</users> |
| 312 |
< |
<processes> |
| 313 |
< |
<total>$packet{"packet.processes.total"}</total> |
| 314 |
< |
<sleeping>$packet{"packet.processes.sleeping"}</sleeping> |
| 315 |
< |
<zombie>$packet{"packet.processes.zombie"}</zombie> |
| 316 |
< |
<stopped>$packet{"packet.processes.stopped"}</stopped> |
| 317 |
< |
<cpu>$packet{"packet.processes.cpu"}</cpu> |
| 318 |
< |
</processes> |
| 319 |
< |
<cpu> |
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< |
<idle>$packet{"packet.cpu.idle"}</idle> |
| 321 |
< |
<user>$packet{"packet.cpu.user"}</user> |
| 322 |
< |
<kernel>$packet{"packet.cpu.kernel"}</kernel> |
| 323 |
< |
<iowait>$packet{"packet.cpu.iowait"}</iowait> |
| 324 |
< |
<swap>$packet{"packet.cpu.swap"}</swap> |
| 325 |
< |
</cpu> |
| 326 |
< |
<memory> |
| 327 |
< |
<total>$packet{"packet.memory.total"}</total> |
| 328 |
< |
<free>$packet{"packet.memory.free"}</free> |
| 329 |
< |
</memory> |
| 330 |
< |
<swap> |
| 331 |
< |
<total>$packet{"packet.swap.total"}</total> |
| 332 |
< |
<free>$packet{"packet.swap.free"}</free> |
| 333 |
< |
</swap> |
| 334 |
< |
$disk_info |
| 335 |
< |
</packet> |
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> |
# sort the data |
| 313 |
> |
@data = sort(grep(!/^$/, grep(/^packet\./, @data))); |
| 314 |
|
|
| 315 |
< |
EOF |
| 315 |
> |
# turn the array into some nice XML |
| 316 |
> |
my($xml) = &make_xml("", ""); |
| 317 |
|
|
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– |
# Make the packet smaller by stripping out newlines and leading spaces. |
| 340 |
– |
$xml =~ s/\n\s*//g; |
| 341 |
– |
|
| 318 |
|
my($sock) = new IO::Socket::INET ( |
| 319 |
|
PeerPort => $udp_port, |
| 320 |
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PeerAddr => $filter_addr, |
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Proto => 'udp' |
| 322 |
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) or die "Could not send UDP: $!\n"; |
| 323 |
< |
|
| 323 |
> |
|
| 324 |
|
print $sock $xml or die "Could not send UDP packet: $!\n"; |
| 325 |
|
close($sock); |
| 326 |
|
$seq_no++; |
| 330 |
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} |
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|
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|
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– |
|
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– |
|
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#----------------------------------------------------------------------- |
| 334 |
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# send_tcp_heartbeat |
| 335 |
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# Establishes a TCP connection to an i-scream filter. |
| 336 |
|
# The heartbeat is used as a guaranteed "I'm alive" delivery mechanism. |
| 337 |
+ |
# If we need to reconfigure, then we complete the heartbeat before |
| 338 |
+ |
# doing so. |
| 339 |
|
#----------------------------------------------------------------------- |
| 340 |
|
sub send_tcp_heartbeat() { |
| 341 |
|
|
| 342 |
+ |
my ($doReconfigure) = 0; |
| 343 |
+ |
|
| 344 |
|
my($sock) = new IO::Socket::INET( |
| 345 |
|
PeerAddr => $filter_addr, |
| 346 |
|
PeerPort => $tcp_port, |
| 387 |
|
if ($response eq "ERROR\n") { |
| 388 |
|
close($sock); |
| 389 |
|
print "Server configuration changed. Reconfiguring with filter manager.\n"; |
| 390 |
< |
&tcp_configure(); |
| 413 |
< |
return; |
| 390 |
> |
$doReconfigure = 1; |
| 391 |
|
} |
| 392 |
|
if (!$response eq "OK\n") { |
| 393 |
|
close($sock); |
| 396 |
|
return; |
| 397 |
|
} |
| 398 |
|
|
| 399 |
+ |
print $sock "KEY\n"; |
| 400 |
+ |
$key = <$sock>; |
| 401 |
+ |
|
| 402 |
|
print $sock "ENDHEARTBEAT\n"; |
| 403 |
|
$response = <$sock>; |
| 404 |
|
if (!$response eq "OK\n") { |
| 411 |
|
close($sock); |
| 412 |
|
print "^"; |
| 413 |
|
|
| 414 |
+ |
&tcp_configure() if $doReconfigure; |
| 415 |
+ |
|
| 416 |
|
return; |
| 417 |
|
} |
| 418 |
|
|
| 419 |
+ |
|
| 420 |
|
#----------------------------------------------------------------------- |
| 421 |
|
# write_pid |
| 422 |
|
# Writes the PID (process ID) of this instance to $pidfile. |
| 428 |
|
close PID; |
| 429 |
|
|
| 430 |
|
return; |
| 431 |
+ |
} |
| 432 |
+ |
|
| 433 |
+ |
#----------------------------------------------------------------------- |
| 434 |
+ |
# make_xml |
| 435 |
+ |
# Turns an array of plugins data into an XML string. |
| 436 |
+ |
#----------------------------------------------------------------------- |
| 437 |
+ |
sub make_xml() { |
| 438 |
+ |
my($curlevel, $curline) = @_; |
| 439 |
+ |
my($xmltemp) = ""; my($curtag) = ""; my($attributes) = ""; |
| 440 |
+ |
while(1) { |
| 441 |
+ |
$curline = shift(@data) if $curline eq ""; |
| 442 |
+ |
return $xmltemp if not defined $curline; |
| 443 |
+ |
chomp $curline; |
| 444 |
+ |
# dealing with nest (or attributes) |
| 445 |
+ |
if($curline =~ /^$curlevel([^\.\s]+\.)/) { |
| 446 |
+ |
$curtag=$1; |
| 447 |
+ |
if($curline =~ /^$curlevel$curtag([^\.\s]+)\s+(.*)$/) { |
| 448 |
+ |
$xmltemp .= &make_xml("$curlevel$curtag", $curline); |
| 449 |
+ |
} |
| 450 |
+ |
elsif($curline =~ /^$curlevel$curtag(attributes)\.([^\.\s]+)\s+(.*)$/) { |
| 451 |
+ |
$attributes .= " $2=\"$3\""; |
| 452 |
+ |
} |
| 453 |
+ |
else { |
| 454 |
+ |
$xmltemp .= &make_xml("$curlevel$curtag", $curline); |
| 455 |
+ |
} |
| 456 |
+ |
my($nextline) = $data[0]; chomp $nextline if defined $nextline; |
| 457 |
+ |
$curtag =~ s/(.*)\./$1/; |
| 458 |
+ |
if((defined $nextline) && ($nextline =~ /^$curlevel$curtag\./)) { |
| 459 |
+ |
$curline = ""; |
| 460 |
+ |
} |
| 461 |
+ |
else { |
| 462 |
+ |
$xmltemp = "<$curtag$attributes>$xmltemp</$curtag>" unless $curtag eq ""; |
| 463 |
+ |
return $xmltemp; |
| 464 |
+ |
} |
| 465 |
+ |
} |
| 466 |
+ |
# dealing with value |
| 467 |
+ |
elsif($curline =~ /^$curlevel([^\.\s]+)\s+(.*)$/) { |
| 468 |
+ |
$curtag=$1; |
| 469 |
+ |
$xmltemp=$2; |
| 470 |
+ |
my($nextline) = $data[0]; chomp $nextline if defined $nextline; |
| 471 |
+ |
if(defined $nextline && ($nextline =~ /^$curlevel$curtag\./ || $nextline =~ /^$curlevel$curtag\s+/)) { |
| 472 |
+ |
$curline = ""; |
| 473 |
+ |
} |
| 474 |
+ |
else { |
| 475 |
+ |
$xmltemp = "<$curtag$attributes>$xmltemp</$curtag>" unless $curtag eq ""; |
| 476 |
+ |
return $xmltemp; |
| 477 |
+ |
} |
| 478 |
+ |
} |
| 479 |
+ |
# dealing with a null value |
| 480 |
+ |
elsif($curline =~ /^$curlevel([^\.\s]+)$/) { |
| 481 |
+ |
# simply adding a space makes the above elsif deal with it :) |
| 482 |
+ |
# just level with an empty tag in the XML |
| 483 |
+ |
$curline .= " "; |
| 484 |
+ |
} |
| 485 |
+ |
# failing all that, skip the line |
| 486 |
+ |
else { |
| 487 |
+ |
$curline = ""; |
| 488 |
+ |
} |
| 489 |
+ |
} |
| 490 |
|
} |
