reports/rrdgraphing/watch.pl

#!/usr/bin/perl -w

# 
# i-scream central monitoring system
# http://www.i-scream.org.uk
# Copyright (C) 2000-2002 i-scream
# 
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#

# -----------------------------------------------------------
# i-scream graph generation scripts
# http://www.i-scream.org.uk
#
# Generates rrd databases for i-scream data by connecting to
# the i-scream server and collecting data.
#
# $Author: tdb $
# $Id: watch.pl,v 1.3 2002/05/21 15:01:43 tdb Exp $
#------------------------------------------------------------

my($version) = '$Id: watch.pl,v 1.3 2002/05/21 15:01:43 tdb Exp $';

$| = 1;

use strict;
use Getopt::Std;
use IO::Socket;
use iscream::XMLParser;
use RRDs;

# define variables that will be read from the config
# nb. keep this insync with the config file!
use vars qw{ 
    $imgdir $rrddir                     
    $maxrrdage $maximgage $deleterrds $deleteimgs
    $hex_slash $hex_underscore  
    $rrdstep $retry_wait
    $verbose $quiet
};

# default locate of the config file
my($configfile) = "rrdgraphing.conf";

# check for command line arguments
my(%opts);
my($ret) = getopts('hvqVc:', \%opts);

# if invalid argument given, $ret will not be 1
&usage() if $ret != 1;

# first process the arguments which might mean we exit now

# -h is usage
if($opts{h}) {
    &usage();
}
# -V is version
if($opts{V}) {
    print "watch.pl version: $version\n";
    exit(1);
}

# Then try getting the config

# -c specifies the config file location
if($opts{c}) {
    $configfile = $opts{c};
}
# suck in the config
&log("reading config from $configfile\n");
do $configfile;

# Then any options we might want to override the config with

# -v is verbose
if($opts{v}) {
    $verbose = $opts{v};
}
# -q is verbose
if($opts{q}) {
    $quiet = $opts{q};
    # if we're meant to be quiet, we can hardly be verbose!
#    $verbose = 0;
}

# Finally check for required arguments

# check we still have two arguments left
if (@ARGV != 2) {
    &usage();
}

# user supplied client interface server and port
my($addr) = $ARGV[0];
my($cport) = $ARGV[1];


# Main program loop
while(1) {
    
    &log("Connecting control channel to port $cport on $addr...\n");
    
    # attempt to connect the control channel
    my($csock) = new IO::Socket::INET(
        PeerAddr => $addr,
        PeerPort => $cport,
        Proto => 'tcp'
        );
    
    # if socket isn't defined connection failed
    if (!defined $csock) {
        &error("ERROR: Could not connect control channel to $addr:$cport.\n");
        &error("Please check that there is an i-scream server at this address.\n");
        &wait_then_retry();
        next;
    }
    
    my($response);
    
    # client interface should send it's protocol ID
    # we know about "PROTOCOL 1.1", and will only accept the same
    $response = <$csock>;
    &log("CLI sent: $response");
    if ($response && $response ne "PROTOCOL 1.1\n") {
        &error("The i-scream server sent an unexpected protocol ID: $response\n");
        close($csock);
        &wait_then_retry();
        next;
    }
    
    # send our identifier to the client interface
    print $csock "rrdgraphing\n";
    &log("we sent: rrdgraphing\n");
    $response = <$csock>;
    &log("CLI sent: $response");
    if ($response && $response ne "OK\n") {
        &error("Received unexpected response: $response\n");
        close($csock);
        &wait_then_retry();
        next;
    }
    
    # tell the client interface we'd like to start the data channel
    print $csock "STARTDATA\n";
    &log("we sent: STARTDATA\n");

    # the response should be the socket to connect the data channel to
    $response = <$csock>;
    &log("CLI sent: $response");
    chomp $response;
    
    my($dport) = $response;
    &log("Connecting data channel to port $dport on $addr...\n");
    
    # attempt to connect the data channel
    my($dsock) = new IO::Socket::INET(
        PeerAddr => $addr,
        PeerPort => $dport,
        Proto => 'tcp'
        ) or die "arse?";
    
    # if socket isn't defined connection failed
    if (!defined $dsock) {
        &error("ERROR: Could not connect data channel to $addr:$dport.\n");
        &error("Failure in communications.\n");
        close($csock);
        &wait_then_retry();
        next;
    }
    
    # the data channel should now be sending us data!
    
    # call sub to process data being received over the data channel
    &processdata($dsock);
    
    # data processing has stopped, close sockets
    close($csock);
    close($dsock);
    
    # wait before retrying
    &wait_then_retry();
}

# we'll never reach here... unless 1 becomes false for some reason ;)
exit 0;


#
# wait for a while before retrying
#
sub wait_then_retry() {
    &error("Will retry connection to i-scream server in $retry_wait seconds.\n\n");
    sleep $retry_wait;
}

#
# Given the socket of the data channel will process all
# the incoming XML data, creating and updating the appropriate
# database files.
#
# $dsock = socket connected to the data channel
#
sub processdata() {
    # the socket connected to the data channel
    my($dsock) = @_;
    # save us recreating this variable each time we loop
    my($xml);
    
    while(1) {
        # read data
        $xml = <$dsock>;
        
        # something odd has happened
        last if not defined $xml;
        
        # attempt to parse the data
        my($err, %xmlhash) = &iscream::XMLParser::parse($xml);
        if($err) {
            &error("Skipped, XML did not parse: $xml");
            next;
        }
        
        # standard data packet
        if($xmlhash{"packet.attributes.type"} eq "data") {
            my($machine) = $xmlhash{"packet.attributes.machine_name"};
            my($date) = $xmlhash{"packet.attributes.date"};
            
            # make directory for machine
            if(! -d "$rrddir/$machine") {
                # not sure on this umask, but it seems to work?
                mkdir "$rrddir/$machine", 0777;
                &log("created directory $rrddir/$machine\n");
            }
            
            my(@data);
            
            # cpu
            @data = ( "packet.cpu.idle:idle:GAUGE",
                      "packet.cpu.user:user:GAUGE",
                      "packet.cpu.kernel:kernel:GAUGE",
                      "packet.cpu.swap:swap:GAUGE",
                      "packet.cpu.iowait:iowait:GAUGE",
                     );
            &updaterrd($machine, "cpu", $date, $rrdstep, \%xmlhash, @data);
                   
            # mem
            @data = ( "packet.memory.free:free:GAUGE",
                      "packet.memory.total:total:GAUGE",
                     );
            &updaterrd($machine, "mem", $date, $rrdstep, \%xmlhash, @data);
                    
            # load
            @data = ( "packet.load.load1:load1:GAUGE",
                      "packet.load.load5:load5:GAUGE",
                      "packet.load.load15:load15:GAUGE",
                     );
            &updaterrd($machine, "load", $date, $rrdstep, \%xmlhash, @data);
            
            # processes
            @data = ( "packet.processes.cpu:cpu:GAUGE",
                      "packet.processes.sleeping:sleeping:GAUGE",
                      "packet.processes.stopped:stopped:GAUGE",
                      "packet.processes.total:total:GAUGE",
                      "packet.processes.zombie:zombie:GAUGE",
                     );
            &updaterrd($machine, "proc", $date, $rrdstep, \%xmlhash, @data);
            
            # swap
            @data = ( "packet.swap.free:free:GAUGE",
                      "packet.swap.total:total:GAUGE",
                     );
            &updaterrd($machine, "swap", $date, $rrdstep, \%xmlhash, @data);
            
            # users
            @data = ( "packet.users.count:count:GAUGE",
                     );
            &updaterrd($machine, "users", $date, $rrdstep, \%xmlhash, @data);
            
            # disk
            my($i) = 0;
            while(defined $xmlhash{"packet.disk.p$i.attributes.mount"}) {
                my($mount) = $xmlhash{"packet.disk.p$i.attributes.mount"};
                $mount =~ s/_/$hex_underscore/g;
                $mount =~ s/\//$hex_slash/g;
                @data = ( "packet.disk.p$i.attributes.kbytes:kbytes:GAUGE",
                          "packet.disk.p$i.attributes.used:used:GAUGE",
                         );
                &updaterrd($machine, "disk-$mount", $date, $rrdstep, \%xmlhash, @data);
                ++$i;
            }
        }
        
        # queue statistics packet
        elsif($xmlhash{"packet.attributes.type"} eq "queueStat") {
            # psuedo machine for internal server stuff
            my($machine) = "i-scream-server";
            # make directory
            if(! -d "$rrddir/$machine") {
                # not sure on this umask, but it seems to work?
                mkdir "$rrddir/$machine", 0777;
                &log("created directory $rrddir/$machine\n");
            }
            my($hash) = $xmlhash{"packet.attributes.hashCode"};
            my($date) = $xmlhash{"packet.attributes.date"};
            my($name) = $xmlhash{"packet.attributes.name"};
            # take a look to see if we have a shutdown packet...
            if($xmlhash{"packet.attributes.shutdown"} && $xmlhash{"packet.attributes.shutdown"} eq "true") {
                unlink <$rrddir/$machine/$hash\_*.rrd>, "$rrddir/$machine/$hash.def", <$imgdir/$machine/$hash*.png>;
                &log("deleted $rrddir/$machine/$hash\_*.rrd $rrddir/$machine/$hash.def $imgdir/$machine/$hash*.png\n");
                next;
            }
            # look through to see how many internal queues we have
            my($i) = 0;
            while(defined $xmlhash{"packet.queue.attributes.queue$i"}) {
                # see if the queue has been removed
                if($xmlhash{"packet.queue.attributes.queue$i"} eq "[deleted]") {
                    # delete the queues rrd
                    unlink "$rrddir/$machine/$hash\_$i.rrd";
                    &log("deleted $rrddir/$machine/$hash\_$i.rrd\n");
                    # are there any other rrd's left on this queue? if not, cleanup.
                    # get a list of any that may be still there..
                    opendir(DIR, "$rrddir/$machine");
                    my(@rrdcountfiles) = grep { -f "$rrddir/$machine/$_" && /^$hash\_\d+.rrd$/ } readdir(DIR);
                    closedir DIR;
                    # count them (+1 because an empty array is size -1)
                    my($rrdcount) = $#rrdcountfiles + 1;
                    if($rrdcount == 0) {
                        # clean up the def file and any images
                        unlink "$rrddir/$machine/$hash.def", <$imgdir/$machine/$hash*.png>;
                        &log("deleted $rrddir/$machine/$hash.def $imgdir/$machine/$hash*.png\n");
                    }
                    ++$i;
                    next;
                }
                # the &updaterrd will also do this check, but we want
                # to write our def file out first
                if( ! -f "$rrddir/$machine/$hash\_$i.rrd" ) {
                    open(DEF, ">$rrddir/$machine/$hash.def");
                    print DEF $name;
                    close DEF;
                    &log("created $rrddir/$machine/$hash.def\n");
                }
                my(@data) = ( "packet.queue.attributes.queue$i:size:GAUGE",
                              "packet.queue.attributes.total:total:COUNTER",
                             );
                &updaterrd($machine, "$hash\_$i", $date, $rrdstep, \%xmlhash, @data);
                ++$i;
            }
        }
        else {
            #&error("SKIPPED: valid xml, but not a data or statistics packet\n");
        }
    }
    
    # we'll now return from this sub and reconnect
    &error("Data channel socket gave no data, bailing out...\n");
}

#
# sub to update an rrd file
#
# $machine   = name of the machine
#              (eg. kernow.ukc.ac.uk)
# $type      = the type of graph for the machine
#              (eg. cpu)
# $date      = the date of the item we want to add
#              (in seconds since the epoch)
# $step      = the interval at which the database steps
#              used when we create a new rrd
# $xmlref    = reference to the xml data packet
# @data      = array containing data items to add
#              (eg. "packet.cpu.user:user:GAUGE")
#
sub updaterrd() {
    my($machine, $type, $date, $step, $xmlref, @data) = @_;
    # get hold of the xmlhash we have a reference to
    my(%xmlhash) = %$xmlref;
    # check if we need to create a new rrd
    if( ! -f "$rrddir/$machine/$type.rrd") {
        my(@createdata);
        # pull the details out of the data we've been given
        foreach my $dataitem (@data) {
            if($dataitem =~ /^\S+:(\S+):(\S+)$/) {
                push @createdata, "$1:$2";
            }
        }
        # call the &makerrd to actually create the rrd
        &log("making new rrd for $rrddir/$machine/$type.rrd\n");
        &makerrd($machine, $type, $date, $step, @createdata);
    }
    # get the details out of the data we've been given
    my($updateparams) = "$date";
    foreach my $dataitem (@data) {
        if($dataitem =~ /^(\S+):\S+:\S+$/) {
            # pull the values straight out of the xmlhash
            my($value) = $xmlhash{$1};
            # if it's undefined we'll set it to 0
            # this probably shouldn't happen, but it'd be best to handle it "nicely" :)
            $value = "0" if not defined $value;
            $updateparams .= ":$value";
        }
    }
    # perform the update
    RRDs::update ("$rrddir/$machine/$type.rrd", $updateparams);
    &log("updating $rrddir/$machine/$type.rrd\n");
    my($err) = RRDs::error;
    &error("Error updating $rrddir/$machine/$type.rrd: $err\n") if $err;
}

#
# sub to create a new rrd file
#
# $machine = name of the machine
#            (eg. kernow.ukc.ac.uk)
# $type    = the type of graph for the machine
#            (eg. cpu)
# $start   = the date of the first item we want to add
#            (in seconds since the epoch)
# $step    = the interval at which the database steps
# @data    = the data items we want to put in the rrd
#            in the form: $dsname:dstype
#            (eg. "size:GAUGE")
#
sub makerrd() {
    my($machine, $type, $start, $step, @data) = @_;
    # check if directory exists for rrd
    if(! -d "$rrddir/$machine") {
        # not sure on this umask, but it seems to work?
        mkdir "$rrddir/$machine", 0777;
        &log("created directory $rrddir/$machine\n");
    }
    my(@rrdcmd);
    # we'll want to add our first data item at $start,
    # so we start our rrd $step before that.
    $start -= $step;
    push @rrdcmd, "$rrddir/$machine/$type.rrd";
    push @rrdcmd, "--start=$start";
    push @rrdcmd, "--step=$step";
    foreach my $dataitem (@data) {
        # dataitem should be: "dsname:dstype"
        if($dataitem =~ /^(\S+):(\S+)$/) {
            push @rrdcmd, "DS:$1:$2:600:U:U";
        }
    }
    push @rrdcmd, (
        # 3h in 15s samples
        "RRA:AVERAGE:0.5:1:720",
        "RRA:MAX:0.5:1:720",
        # 1d in 2m samples
        "RRA:AVERAGE:0.5:8:720",
        "RRA:MAX:0.5:8:720",
        # 1w in 15m samples
        "RRA:AVERAGE:0.5:60:672",
        "RRA:MAX:0.5:60:672",
        # 1m in 1hr samples
        "RRA:AVERAGE:0.5:240:744",
        "RRA:MAX:0.5:240:744",
        # 1y in 12hr samples
        "RRA:AVERAGE:0.5:2880:730",
        "RRA:MAX:0.5:2880:730",
    );
    RRDs::create (@rrdcmd);
    my($err) = RRDs::error;
    &error("Error creating rrd for $rrddir/$machine/$type: $err\n") if $err;
}

# prints out usage information then exits
sub usage() {
    print "Usage: watch.pl [options] i-scream_client_interface port\n";
    print "Options\n";
    print "  -c config        Specifies the configuration file\n";
    print "                    default: rrdgraphing.conf\n";
    print "  -v               Be verbose about what's happening\n";
    print "  -q               Be quiet, even supress errors\n";
    print "  -V               Print version number\n";
    print "  -h               Prints this help page\n";
    exit(1);
}

# prints a log message if verbose is turned on
sub log() {
    my($msg) = @_;
    print $msg if $verbose;
}

# prints an error message unless quiet is turned on
sub error() {
    my($msg) = @_;
    print STDERR $msg unless $quiet;
}
Revision:	1.4
Committed:	Tue May 21 16:47:16 2002 UTC (22 years, 5 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.3:	+3 -2 lines
Log Message:	Added URL to GPL headers.
#	User	Rev	Content
1	tdb	1.1	#!/usr/bin/perl -w
2
3	tdb	1.2	#
4			# i-scream central monitoring system
5	tdb	1.4	# http://www.i-scream.org.uk
6	tdb	1.2	# Copyright (C) 2000-2002 i-scream
7			#
8			# This program is free software; you can redistribute it and/or
9			# modify it under the terms of the GNU General Public License
10			# as published by the Free Software Foundation; either version 2
11			# of the License, or (at your option) any later version.
12			#
13			# This program is distributed in the hope that it will be useful,
14			# but WITHOUT ANY WARRANTY; without even the implied warranty of
15			# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			# GNU General Public License for more details.
17			#
18			# You should have received a copy of the GNU General Public License
19			# along with this program; if not, write to the Free Software
20			# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21			#
22
23	tdb	1.1	# -----------------------------------------------------------
24			# i-scream graph generation scripts
25			# http://www.i-scream.org.uk
26			#
27			# Generates rrd databases for i-scream data by connecting to
28			# the i-scream server and collecting data.
29			#
30			# $Author: tdb $
31	tdb	1.4	# $Id: watch.pl,v 1.3 2002/05/21 15:01:43 tdb Exp $
32	tdb	1.1	#------------------------------------------------------------
33
34	tdb	1.4	my($version) = '$Id: watch.pl,v 1.3 2002/05/21 15:01:43 tdb Exp $';
35	tdb	1.1
36			$\| = 1;
37
38			use strict;
39	tdb	1.3	use Getopt::Std;
40			use IO::Socket;
41	tdb	1.1	use iscream::XMLParser;
42			use RRDs;
43
44	tdb	1.3	# define variables that will be read from the config
45			# nb. keep this insync with the config file!
46			use vars qw{
47			$imgdir $rrddir
48			$maxrrdage $maximgage $deleterrds $deleteimgs
49			$hex_slash $hex_underscore
50			$rrdstep $retry_wait
51			$verbose $quiet
52			};
53
54			# default locate of the config file
55			my($configfile) = "rrdgraphing.conf";
56
57			# check for command line arguments
58			my(%opts);
59			my($ret) = getopts('hvqVc:', \%opts);
60
61			# if invalid argument given, $ret will not be 1
62			&usage() if $ret != 1;
63
64			# first process the arguments which might mean we exit now
65
66			# -h is usage
67			if($opts{h}) {
68			&usage();
69			}
70			# -V is version
71			if($opts{V}) {
72			print "watch.pl version: $version\n";
73			exit(1);
74			}
75	tdb	1.1
76	tdb	1.3	# Then try getting the config
77	tdb	1.1
78	tdb	1.3	# -c specifies the config file location
79			if($opts{c}) {
80			$configfile = $opts{c};
81			}
82			# suck in the config
83			&log("reading config from $configfile\n");
84			do $configfile;
85
86			# Then any options we might want to override the config with
87
88			# -v is verbose
89			if($opts{v}) {
90			$verbose = $opts{v};
91			}
92			# -q is verbose
93			if($opts{q}) {
94			$quiet = $opts{q};
95			# if we're meant to be quiet, we can hardly be verbose!
96			# $verbose = 0;
97			}
98	tdb	1.1
99	tdb	1.3	# Finally check for required arguments
100
101			# check we still have two arguments left
102	tdb	1.1	if (@ARGV != 2) {
103	tdb	1.3	&usage();
104	tdb	1.1	}
105
106			# user supplied client interface server and port
107			my($addr) = $ARGV[0];
108			my($cport) = $ARGV[1];
109
110	tdb	1.3
111			# Main program loop
112	tdb	1.1	while(1) {
113
114	tdb	1.3	&log("Connecting control channel to port $cport on $addr...\n");
115	tdb	1.1
116			# attempt to connect the control channel
117			my($csock) = new IO::Socket::INET(
118			PeerAddr => $addr,
119			PeerPort => $cport,
120			Proto => 'tcp'
121			);
122
123			# if socket isn't defined connection failed
124			if (!defined $csock) {
125	tdb	1.3	&error("ERROR: Could not connect control channel to $addr:$cport.\n");
126			&error("Please check that there is an i-scream server at this address.\n");
127	tdb	1.1	&wait_then_retry();
128			next;
129			}
130
131			my($response);
132
133			# client interface should send it's protocol ID
134			# we know about "PROTOCOL 1.1", and will only accept the same
135			$response = <$csock>;
136	tdb	1.3	&log("CLI sent: $response");
137	tdb	1.1	if ($response && $response ne "PROTOCOL 1.1\n") {
138	tdb	1.3	&error("The i-scream server sent an unexpected protocol ID: $response\n");
139	tdb	1.1	close($csock);
140			&wait_then_retry();
141			next;
142			}
143
144			# send our identifier to the client interface
145			print $csock "rrdgraphing\n";
146	tdb	1.3	&log("we sent: rrdgraphing\n");
147	tdb	1.1	$response = <$csock>;
148	tdb	1.3	&log("CLI sent: $response");
149	tdb	1.1	if ($response && $response ne "OK\n") {
150	tdb	1.3	&error("Received unexpected response: $response\n");
151	tdb	1.1	close($csock);
152			&wait_then_retry();
153			next;
154			}
155
156			# tell the client interface we'd like to start the data channel
157			print $csock "STARTDATA\n";
158	tdb	1.3	&log("we sent: STARTDATA\n");
159
160	tdb	1.1	# the response should be the socket to connect the data channel to
161			$response = <$csock>;
162	tdb	1.3	&log("CLI sent: $response");
163	tdb	1.1	chomp $response;
164
165			my($dport) = $response;
166	tdb	1.3	&log("Connecting data channel to port $dport on $addr...\n");
167	tdb	1.1
168			# attempt to connect the data channel
169			my($dsock) = new IO::Socket::INET(
170			PeerAddr => $addr,
171			PeerPort => $dport,
172			Proto => 'tcp'
173			) or die "arse?";
174
175			# if socket isn't defined connection failed
176			if (!defined $dsock) {
177	tdb	1.3	&error("ERROR: Could not connect data channel to $addr:$dport.\n");
178			&error("Failure in communications.\n");
179	tdb	1.1	close($csock);
180			&wait_then_retry();
181			next;
182			}
183
184			# the data channel should now be sending us data!
185
186			# call sub to process data being received over the data channel
187			&processdata($dsock);
188
189			# data processing has stopped, close sockets
190			close($csock);
191			close($dsock);
192
193			# wait before retrying
194			&wait_then_retry();
195			}
196
197			# we'll never reach here... unless 1 becomes false for some reason ;)
198			exit 0;
199
200
201			#
202			# wait for a while before retrying
203			#
204			sub wait_then_retry() {
205	tdb	1.3	&error("Will retry connection to i-scream server in $retry_wait seconds.\n\n");
206	tdb	1.1	sleep $retry_wait;
207			}
208
209			#
210			# Given the socket of the data channel will process all
211			# the incoming XML data, creating and updating the appropriate
212			# database files.
213			#
214			# $dsock = socket connected to the data channel
215			#
216			sub processdata() {
217			# the socket connected to the data channel
218			my($dsock) = @_;
219			# save us recreating this variable each time we loop
220			my($xml);
221
222			while(1) {
223			# read data
224			$xml = <$dsock>;
225
226			# something odd has happened
227			last if not defined $xml;
228
229			# attempt to parse the data
230			my($err, %xmlhash) = &iscream::XMLParser::parse($xml);
231			if($err) {
232	tdb	1.3	&error("Skipped, XML did not parse: $xml");
233	tdb	1.1	next;
234			}
235
236			# standard data packet
237			if($xmlhash{"packet.attributes.type"} eq "data") {
238			my($machine) = $xmlhash{"packet.attributes.machine_name"};
239			my($date) = $xmlhash{"packet.attributes.date"};
240
241			# make directory for machine
242			if(! -d "$rrddir/$machine") {
243			# not sure on this umask, but it seems to work?
244			mkdir "$rrddir/$machine", 0777;
245	tdb	1.3	&log("created directory $rrddir/$machine\n");
246	tdb	1.1	}
247
248			my(@data);
249
250			# cpu
251			@data = ( "packet.cpu.idle:idle:GAUGE",
252			"packet.cpu.user:user:GAUGE",
253			"packet.cpu.kernel:kernel:GAUGE",
254			"packet.cpu.swap:swap:GAUGE",
255			"packet.cpu.iowait:iowait:GAUGE",
256			);
257			&updaterrd($machine, "cpu", $date, $rrdstep, \%xmlhash, @data);
258
259			# mem
260			@data = ( "packet.memory.free:free:GAUGE",
261			"packet.memory.total:total:GAUGE",
262			);
263			&updaterrd($machine, "mem", $date, $rrdstep, \%xmlhash, @data);
264
265			# load
266			@data = ( "packet.load.load1:load1:GAUGE",
267			"packet.load.load5:load5:GAUGE",
268			"packet.load.load15:load15:GAUGE",
269			);
270			&updaterrd($machine, "load", $date, $rrdstep, \%xmlhash, @data);
271
272			# processes
273			@data = ( "packet.processes.cpu:cpu:GAUGE",
274			"packet.processes.sleeping:sleeping:GAUGE",
275			"packet.processes.stopped:stopped:GAUGE",
276			"packet.processes.total:total:GAUGE",
277			"packet.processes.zombie:zombie:GAUGE",
278			);
279			&updaterrd($machine, "proc", $date, $rrdstep, \%xmlhash, @data);
280
281			# swap
282			@data = ( "packet.swap.free:free:GAUGE",
283			"packet.swap.total:total:GAUGE",
284			);
285			&updaterrd($machine, "swap", $date, $rrdstep, \%xmlhash, @data);
286
287			# users
288			@data = ( "packet.users.count:count:GAUGE",
289			);
290			&updaterrd($machine, "users", $date, $rrdstep, \%xmlhash, @data);
291
292			# disk
293			my($i) = 0;
294			while(defined $xmlhash{"packet.disk.p$i.attributes.mount"}) {
295			my($mount) = $xmlhash{"packet.disk.p$i.attributes.mount"};
296			$mount =~ s/_/$hex_underscore/g;
297			$mount =~ s/\//$hex_slash/g;
298			@data = ( "packet.disk.p$i.attributes.kbytes:kbytes:GAUGE",
299			"packet.disk.p$i.attributes.used:used:GAUGE",
300			);
301			&updaterrd($machine, "disk-$mount", $date, $rrdstep, \%xmlhash, @data);
302			++$i;
303			}
304			}
305
306			# queue statistics packet
307			elsif($xmlhash{"packet.attributes.type"} eq "queueStat") {
308			# psuedo machine for internal server stuff
309			my($machine) = "i-scream-server";
310			# make directory
311			if(! -d "$rrddir/$machine") {
312			# not sure on this umask, but it seems to work?
313			mkdir "$rrddir/$machine", 0777;
314	tdb	1.3	&log("created directory $rrddir/$machine\n");
315	tdb	1.1	}
316			my($hash) = $xmlhash{"packet.attributes.hashCode"};
317			my($date) = $xmlhash{"packet.attributes.date"};
318			my($name) = $xmlhash{"packet.attributes.name"};
319			# take a look to see if we have a shutdown packet...
320			if($xmlhash{"packet.attributes.shutdown"} && $xmlhash{"packet.attributes.shutdown"} eq "true") {
321			unlink <$rrddir/$machine/$hash\_.rrd>, "$rrddir/$machine/$hash.def", <$imgdir/$machine/$hash.png>;
322	tdb	1.3	&log("deleted $rrddir/$machine/$hash\_.rrd $rrddir/$machine/$hash.def $imgdir/$machine/$hash.png\n");
323	tdb	1.1	next;
324			}
325			# look through to see how many internal queues we have
326			my($i) = 0;
327			while(defined $xmlhash{"packet.queue.attributes.queue$i"}) {
328			# see if the queue has been removed
329			if($xmlhash{"packet.queue.attributes.queue$i"} eq "[deleted]") {
330			# delete the queues rrd
331			unlink "$rrddir/$machine/$hash\_$i.rrd";
332	tdb	1.3	&log("deleted $rrddir/$machine/$hash\_$i.rrd\n");
333	tdb	1.1	# are there any other rrd's left on this queue? if not, cleanup.
334			# get a list of any that may be still there..
335			opendir(DIR, "$rrddir/$machine");
336			my(@rrdcountfiles) = grep { -f "$rrddir/$machine/$_" && /^$hash\_\d+.rrd$/ } readdir(DIR);
337			closedir DIR;
338			# count them (+1 because an empty array is size -1)
339			my($rrdcount) = $#rrdcountfiles + 1;
340			if($rrdcount == 0) {
341			# clean up the def file and any images
342			unlink "$rrddir/$machine/$hash.def", <$imgdir/$machine/$hash*.png>;
343	tdb	1.3	&log("deleted $rrddir/$machine/$hash.def $imgdir/$machine/$hash*.png\n");
344	tdb	1.1	}
345			++$i;
346			next;
347			}
348			# the &updaterrd will also do this check, but we want
349			# to write our def file out first
350			if( ! -f "$rrddir/$machine/$hash\_$i.rrd" ) {
351			open(DEF, ">$rrddir/$machine/$hash.def");
352			print DEF $name;
353			close DEF;
354	tdb	1.3	&log("created $rrddir/$machine/$hash.def\n");
355	tdb	1.1	}
356			my(@data) = ( "packet.queue.attributes.queue$i:size:GAUGE",
357			"packet.queue.attributes.total:total:COUNTER",
358			);
359			&updaterrd($machine, "$hash\_$i", $date, $rrdstep, \%xmlhash, @data);
360			++$i;
361			}
362			}
363			else {
364	tdb	1.3	#&error("SKIPPED: valid xml, but not a data or statistics packet\n");
365	tdb	1.1	}
366			}
367
368			# we'll now return from this sub and reconnect
369	tdb	1.3	&error("Data channel socket gave no data, bailing out...\n");
370	tdb	1.1	}
371
372			#
373			# sub to update an rrd file
374			#
375			# $machine = name of the machine
376			# (eg. kernow.ukc.ac.uk)
377			# $type = the type of graph for the machine
378			# (eg. cpu)
379			# $date = the date of the item we want to add
380			# (in seconds since the epoch)
381			# $step = the interval at which the database steps
382			# used when we create a new rrd
383			# $xmlref = reference to the xml data packet
384			# @data = array containing data items to add
385			# (eg. "packet.cpu.user:user:GAUGE")
386			#
387			sub updaterrd() {
388			my($machine, $type, $date, $step, $xmlref, @data) = @_;
389			# get hold of the xmlhash we have a reference to
390			my(%xmlhash) = %$xmlref;
391			# check if we need to create a new rrd
392			if( ! -f "$rrddir/$machine/$type.rrd") {
393			my(@createdata);
394			# pull the details out of the data we've been given
395			foreach my $dataitem (@data) {
396			if($dataitem =~ /^\S+:(\S+):(\S+)$/) {
397			push @createdata, "$1:$2";
398			}
399			}
400			# call the &makerrd to actually create the rrd
401	tdb	1.3	&log("making new rrd for $rrddir/$machine/$type.rrd\n");
402	tdb	1.1	&makerrd($machine, $type, $date, $step, @createdata);
403			}
404			# get the details out of the data we've been given
405			my($updateparams) = "$date";
406			foreach my $dataitem (@data) {
407			if($dataitem =~ /^(\S+):\S+:\S+$/) {
408			# pull the values straight out of the xmlhash
409			my($value) = $xmlhash{$1};
410			# if it's undefined we'll set it to 0
411			# this probably shouldn't happen, but it'd be best to handle it "nicely" :)
412			$value = "0" if not defined $value;
413			$updateparams .= ":$value";
414			}
415			}
416			# perform the update
417			RRDs::update ("$rrddir/$machine/$type.rrd", $updateparams);
418	tdb	1.3	&log("updating $rrddir/$machine/$type.rrd\n");
419	tdb	1.1	my($err) = RRDs::error;
420	tdb	1.3	&error("Error updating $rrddir/$machine/$type.rrd: $err\n") if $err;
421	tdb	1.1	}
422
423			#
424			# sub to create a new rrd file
425			#
426			# $machine = name of the machine
427			# (eg. kernow.ukc.ac.uk)
428			# $type = the type of graph for the machine
429			# (eg. cpu)
430			# $start = the date of the first item we want to add
431			# (in seconds since the epoch)
432			# $step = the interval at which the database steps
433			# @data = the data items we want to put in the rrd
434			# in the form: $dsname:dstype
435			# (eg. "size:GAUGE")
436			#
437			sub makerrd() {
438			my($machine, $type, $start, $step, @data) = @_;
439			# check if directory exists for rrd
440			if(! -d "$rrddir/$machine") {
441			# not sure on this umask, but it seems to work?
442			mkdir "$rrddir/$machine", 0777;
443	tdb	1.3	&log("created directory $rrddir/$machine\n");
444	tdb	1.1	}
445			my(@rrdcmd);
446			# we'll want to add our first data item at $start,
447			# so we start our rrd $step before that.
448			$start -= $step;
449			push @rrdcmd, "$rrddir/$machine/$type.rrd";
450			push @rrdcmd, "--start=$start";
451			push @rrdcmd, "--step=$step";
452			foreach my $dataitem (@data) {
453			# dataitem should be: "dsname:dstype"
454			if($dataitem =~ /^(\S+):(\S+)$/) {
455			push @rrdcmd, "DS:$1:$2:600:U:U";
456			}
457			}
458			push @rrdcmd, (
459			# 3h in 15s samples
460			"RRA:AVERAGE:0.5:1:720",
461			"RRA:MAX:0.5:1:720",
462			# 1d in 2m samples
463			"RRA:AVERAGE:0.5:8:720",
464			"RRA:MAX:0.5:8:720",
465			# 1w in 15m samples
466			"RRA:AVERAGE:0.5:60:672",
467			"RRA:MAX:0.5:60:672",
468			# 1m in 1hr samples
469			"RRA:AVERAGE:0.5:240:744",
470			"RRA:MAX:0.5:240:744",
471			# 1y in 12hr samples
472			"RRA:AVERAGE:0.5:2880:730",
473			"RRA:MAX:0.5:2880:730",
474			);
475			RRDs::create (@rrdcmd);
476			my($err) = RRDs::error;
477	tdb	1.3	&error("Error creating rrd for $rrddir/$machine/$type: $err\n") if $err;
478			}
479
480			# prints out usage information then exits
481			sub usage() {
482			print "Usage: watch.pl [options] i-scream_client_interface port\n";
483			print "Options\n";
484			print " -c config Specifies the configuration file\n";
485			print " default: rrdgraphing.conf\n";
486			print " -v Be verbose about what's happening\n";
487			print " -q Be quiet, even supress errors\n";
488			print " -V Print version number\n";
489			print " -h Prints this help page\n";
490			exit(1);
491			}
492
493			# prints a log message if verbose is turned on
494			sub log() {
495			my($msg) = @_;
496			print $msg if $verbose;
497			}
498
499			# prints an error message unless quiet is turned on
500			sub error() {
501			my($msg) = @_;
502			print STDERR $msg unless $quiet;
503	tdb	1.1	}