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 1.6 2003/03/10 11:34:43 tdb Exp $
#------------------------------------------------------------

BEGIN {
    push (@INC, "/usr/local/packages/rrdtool/lib/perl5/site_perl/5.8.2/sun4-solaris");
}

my($version) = '$Id: watch.pl,v 1.6 2003/03/10 11:34:43 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",
                      "packet.memory.cache:cache: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);

            # paging
            @data = ( "packet.pages.pageins:pageins:GAUGE",
                      "packet.pages.pageouts:pageouts:GAUGE",
                     );
            &updaterrd($machine, "paging", $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$i.attributes.total:total:GAUGE",
                          "packet.disk.p$i.attributes.used:used:GAUGE",
                          "packet.disk.p$i.attributes.totalinodes:totalinodes:GAUGE",
                          "packet.disk.p$i.attributes.freeinodes:freeinodes:GAUGE",
                         );
                &updaterrd($machine, "disk-$mount", $date, $rrdstep, \%xmlhash, @data);
                ++$i;
            }

            # diskio
            $i = 0;
            while(defined $xmlhash{"packet.diskio.p$i.attributes.name"}) {
                my($name) = $xmlhash{"packet.diskio.p$i.attributes.name"};
                @data = ( "packet.diskio.p$i.attributes.rbytes:rbytes:GAUGE",
                          "packet.diskio.p$i.attributes.wbytes:wbytes:GAUGE",
                         );
                &updaterrd($machine, "diskio-$name", $date, $rrdstep, \%xmlhash, @data);
                ++$i
            }

            # net
            $i = 0;
            while(defined $xmlhash{"packet.net.p$i.attributes.name"}) {
                my($name) = $xmlhash{"packet.net.p$i.attributes.name"};
                @data = ( "packet.net.p$i.attributes.rx:rx:GAUGE",
                          "packet.net.p$i.attributes.tx:tx:GAUGE",
                         );
                &updaterrd($machine, "net-$name", $date, $rrdstep, \%xmlhash, @data);
                ++$i
            }

            # mailq
            $i = 0;
            while(defined $xmlhash{"packet.mailq.p$i.attributes.name"}) {
                my($name) = $xmlhash{"packet.mailq.p$i.attributes.name"};
                $name =~ s/\s+//g;
                @data = ( "packet.mailq.p$i.attributes.size:size:GAUGE",
                         );
                &updaterrd($machine, "mailq-$name", $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:	1.7
Committed:	Thu Mar 4 11:27:30 2004 UTC (20 years, 9 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.6:	+19 -4 lines
Log Message:	Latest versions of the rrdgraphing code. Some graphs now use areas, others use stacks. Added cache memory, and our mail queue graphs.
#	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	1.7	# $Id: watch.pl,v 1.6 2003/03/10 11:34:43 tdb Exp $
32	tdb	1.1	#------------------------------------------------------------
33
34	tdb	1.7	BEGIN {
35			push (@INC, "/usr/local/packages/rrdtool/lib/perl5/site_perl/5.8.2/sun4-solaris");
36			}
37
38			my($version) = '$Id: watch.pl,v 1.6 2003/03/10 11:34:43 tdb Exp $';
39	tdb	1.1
40			$\| = 1;
41
42			use strict;
43	tdb	1.3	use Getopt::Std;
44			use IO::Socket;
45	tdb	1.1	use iscream::XMLParser;
46			use RRDs;
47
48	tdb	1.3	# define variables that will be read from the config
49			# nb. keep this insync with the config file!
50			use vars qw{
51			$imgdir $rrddir
52			$maxrrdage $maximgage $deleterrds $deleteimgs
53			$hex_slash $hex_underscore
54			$rrdstep $retry_wait
55			$verbose $quiet
56			};
57
58			# default locate of the config file
59			my($configfile) = "rrdgraphing.conf";
60
61			# check for command line arguments
62			my(%opts);
63			my($ret) = getopts('hvqVc:', \%opts);
64
65			# if invalid argument given, $ret will not be 1
66			&usage() if $ret != 1;
67
68			# first process the arguments which might mean we exit now
69
70			# -h is usage
71			if($opts{h}) {
72			&usage();
73			}
74			# -V is version
75			if($opts{V}) {
76			print "watch.pl version: $version\n";
77			exit(1);
78			}
79	tdb	1.1
80	tdb	1.3	# Then try getting the config
81	tdb	1.1
82	tdb	1.3	# -c specifies the config file location
83			if($opts{c}) {
84			$configfile = $opts{c};
85			}
86			# suck in the config
87			&log("reading config from $configfile\n");
88			do $configfile;
89
90			# Then any options we might want to override the config with
91
92			# -v is verbose
93			if($opts{v}) {
94			$verbose = $opts{v};
95			}
96			# -q is verbose
97			if($opts{q}) {
98			$quiet = $opts{q};
99			# if we're meant to be quiet, we can hardly be verbose!
100			# $verbose = 0;
101			}
102	tdb	1.1
103	tdb	1.3	# Finally check for required arguments
104
105			# check we still have two arguments left
106	tdb	1.1	if (@ARGV != 2) {
107	tdb	1.3	&usage();
108	tdb	1.1	}
109
110			# user supplied client interface server and port
111			my($addr) = $ARGV[0];
112			my($cport) = $ARGV[1];
113
114	tdb	1.3
115			# Main program loop
116	tdb	1.1	while(1) {
117
118	tdb	1.3	&log("Connecting control channel to port $cport on $addr...\n");
119	tdb	1.1
120			# attempt to connect the control channel
121			my($csock) = new IO::Socket::INET(
122			PeerAddr => $addr,
123			PeerPort => $cport,
124			Proto => 'tcp'
125			);
126
127			# if socket isn't defined connection failed
128			if (!defined $csock) {
129	tdb	1.3	&error("ERROR: Could not connect control channel to $addr:$cport.\n");
130			&error("Please check that there is an i-scream server at this address.\n");
131	tdb	1.1	&wait_then_retry();
132			next;
133			}
134
135			my($response);
136
137			# client interface should send it's protocol ID
138			# we know about "PROTOCOL 1.1", and will only accept the same
139			$response = <$csock>;
140	tdb	1.3	&log("CLI sent: $response");
141	tdb	1.1	if ($response && $response ne "PROTOCOL 1.1\n") {
142	tdb	1.3	&error("The i-scream server sent an unexpected protocol ID: $response\n");
143	tdb	1.1	close($csock);
144			&wait_then_retry();
145			next;
146			}
147
148			# send our identifier to the client interface
149			print $csock "rrdgraphing\n";
150	tdb	1.3	&log("we sent: rrdgraphing\n");
151	tdb	1.1	$response = <$csock>;
152	tdb	1.3	&log("CLI sent: $response");
153	tdb	1.1	if ($response && $response ne "OK\n") {
154	tdb	1.3	&error("Received unexpected response: $response\n");
155	tdb	1.1	close($csock);
156			&wait_then_retry();
157			next;
158			}
159
160			# tell the client interface we'd like to start the data channel
161			print $csock "STARTDATA\n";
162	tdb	1.3	&log("we sent: STARTDATA\n");
163
164	tdb	1.1	# the response should be the socket to connect the data channel to
165			$response = <$csock>;
166	tdb	1.3	&log("CLI sent: $response");
167	tdb	1.1	chomp $response;
168
169			my($dport) = $response;
170	tdb	1.3	&log("Connecting data channel to port $dport on $addr...\n");
171	tdb	1.1
172			# attempt to connect the data channel
173			my($dsock) = new IO::Socket::INET(
174			PeerAddr => $addr,
175			PeerPort => $dport,
176			Proto => 'tcp'
177			) or die "arse?";
178
179			# if socket isn't defined connection failed
180			if (!defined $dsock) {
181	tdb	1.3	&error("ERROR: Could not connect data channel to $addr:$dport.\n");
182			&error("Failure in communications.\n");
183	tdb	1.1	close($csock);
184			&wait_then_retry();
185			next;
186			}
187
188			# the data channel should now be sending us data!
189
190			# call sub to process data being received over the data channel
191			&processdata($dsock);
192
193			# data processing has stopped, close sockets
194			close($csock);
195			close($dsock);
196
197			# wait before retrying
198			&wait_then_retry();
199			}
200
201			# we'll never reach here... unless 1 becomes false for some reason ;)
202			exit 0;
203
204
205			#
206			# wait for a while before retrying
207			#
208			sub wait_then_retry() {
209	tdb	1.3	&error("Will retry connection to i-scream server in $retry_wait seconds.\n\n");
210	tdb	1.1	sleep $retry_wait;
211			}
212
213			#
214			# Given the socket of the data channel will process all
215			# the incoming XML data, creating and updating the appropriate
216			# database files.
217			#
218			# $dsock = socket connected to the data channel
219			#
220			sub processdata() {
221			# the socket connected to the data channel
222			my($dsock) = @_;
223			# save us recreating this variable each time we loop
224			my($xml);
225
226			while(1) {
227			# read data
228			$xml = <$dsock>;
229
230			# something odd has happened
231			last if not defined $xml;
232
233			# attempt to parse the data
234			my($err, %xmlhash) = &iscream::XMLParser::parse($xml);
235			if($err) {
236	tdb	1.3	&error("Skipped, XML did not parse: $xml");
237	tdb	1.1	next;
238			}
239
240			# standard data packet
241			if($xmlhash{"packet.attributes.type"} eq "data") {
242			my($machine) = $xmlhash{"packet.attributes.machine_name"};
243			my($date) = $xmlhash{"packet.attributes.date"};
244
245			# make directory for machine
246			if(! -d "$rrddir/$machine") {
247			# not sure on this umask, but it seems to work?
248			mkdir "$rrddir/$machine", 0777;
249	tdb	1.3	&log("created directory $rrddir/$machine\n");
250	tdb	1.1	}
251
252			my(@data);
253
254			# cpu
255			@data = ( "packet.cpu.idle:idle:GAUGE",
256			"packet.cpu.user:user:GAUGE",
257			"packet.cpu.kernel:kernel:GAUGE",
258			"packet.cpu.swap:swap:GAUGE",
259			"packet.cpu.iowait:iowait:GAUGE",
260			);
261			&updaterrd($machine, "cpu", $date, $rrdstep, \%xmlhash, @data);
262
263			# mem
264			@data = ( "packet.memory.free:free:GAUGE",
265			"packet.memory.total:total:GAUGE",
266	tdb	1.7	"packet.memory.cache:cache:GAUGE",
267	tdb	1.1	);
268			&updaterrd($machine, "mem", $date, $rrdstep, \%xmlhash, @data);
269
270			# load
271			@data = ( "packet.load.load1:load1:GAUGE",
272			"packet.load.load5:load5:GAUGE",
273			"packet.load.load15:load15:GAUGE",
274			);
275			&updaterrd($machine, "load", $date, $rrdstep, \%xmlhash, @data);
276
277			# processes
278			@data = ( "packet.processes.cpu:cpu:GAUGE",
279			"packet.processes.sleeping:sleeping:GAUGE",
280			"packet.processes.stopped:stopped:GAUGE",
281			"packet.processes.total:total:GAUGE",
282			"packet.processes.zombie:zombie:GAUGE",
283			);
284			&updaterrd($machine, "proc", $date, $rrdstep, \%xmlhash, @data);
285
286			# swap
287			@data = ( "packet.swap.free:free:GAUGE",
288			"packet.swap.total:total:GAUGE",
289			);
290			&updaterrd($machine, "swap", $date, $rrdstep, \%xmlhash, @data);
291
292			# users
293			@data = ( "packet.users.count:count:GAUGE",
294			);
295			&updaterrd($machine, "users", $date, $rrdstep, \%xmlhash, @data);
296	tdb	1.5
297			# paging
298	tdb	1.6	@data = ( "packet.pages.pageins:pageins:GAUGE",
299			"packet.pages.pageouts:pageouts:GAUGE",
300	tdb	1.5	);
301			&updaterrd($machine, "paging", $date, $rrdstep, \%xmlhash, @data);
302
303	tdb	1.1	# disk
304			my($i) = 0;
305			while(defined $xmlhash{"packet.disk.p$i.attributes.mount"}) {
306			my($mount) = $xmlhash{"packet.disk.p$i.attributes.mount"};
307			$mount =~ s/_/$hex_underscore/g;
308			$mount =~ s/\//$hex_slash/g;
309	tdb	1.6	@data = ( "packet.disk.p$i.attributes.total:total:GAUGE",
310	tdb	1.1	"packet.disk.p$i.attributes.used:used:GAUGE",
311	tdb	1.5	"packet.disk.p$i.attributes.totalinodes:totalinodes:GAUGE",
312			"packet.disk.p$i.attributes.freeinodes:freeinodes:GAUGE",
313	tdb	1.1	);
314			&updaterrd($machine, "disk-$mount", $date, $rrdstep, \%xmlhash, @data);
315			++$i;
316	tdb	1.6	}
317
318			# diskio
319			$i = 0;
320			while(defined $xmlhash{"packet.diskio.p$i.attributes.name"}) {
321			my($name) = $xmlhash{"packet.diskio.p$i.attributes.name"};
322			@data = ( "packet.diskio.p$i.attributes.rbytes:rbytes:GAUGE",
323			"packet.diskio.p$i.attributes.wbytes:wbytes:GAUGE",
324			);
325			&updaterrd($machine, "diskio-$name", $date, $rrdstep, \%xmlhash, @data);
326			++$i
327			}
328
329			# net
330			$i = 0;
331			while(defined $xmlhash{"packet.net.p$i.attributes.name"}) {
332			my($name) = $xmlhash{"packet.net.p$i.attributes.name"};
333			@data = ( "packet.net.p$i.attributes.rx:rx:GAUGE",
334			"packet.net.p$i.attributes.tx:tx:GAUGE",
335			);
336	tdb	1.7	&updaterrd($machine, "net-$name", $date, $rrdstep, \%xmlhash, @data);
337			++$i
338			}
339
340			# mailq
341			$i = 0;
342			while(defined $xmlhash{"packet.mailq.p$i.attributes.name"}) {
343			my($name) = $xmlhash{"packet.mailq.p$i.attributes.name"};
344			$name =~ s/\s+//g;
345			@data = ( "packet.mailq.p$i.attributes.size:size:GAUGE",
346			);
347			&updaterrd($machine, "mailq-$name", $date, $rrdstep, \%xmlhash, @data);
348	tdb	1.6	++$i
349	tdb	1.1	}
350			}
351
352			# queue statistics packet
353			elsif($xmlhash{"packet.attributes.type"} eq "queueStat") {
354			# psuedo machine for internal server stuff
355			my($machine) = "i-scream-server";
356			# make directory
357			if(! -d "$rrddir/$machine") {
358			# not sure on this umask, but it seems to work?
359			mkdir "$rrddir/$machine", 0777;
360	tdb	1.3	&log("created directory $rrddir/$machine\n");
361	tdb	1.1	}
362			my($hash) = $xmlhash{"packet.attributes.hashCode"};
363			my($date) = $xmlhash{"packet.attributes.date"};
364			my($name) = $xmlhash{"packet.attributes.name"};
365			# take a look to see if we have a shutdown packet...
366			if($xmlhash{"packet.attributes.shutdown"} && $xmlhash{"packet.attributes.shutdown"} eq "true") {
367			unlink <$rrddir/$machine/$hash\_.rrd>, "$rrddir/$machine/$hash.def", <$imgdir/$machine/$hash.png>;
368	tdb	1.3	&log("deleted $rrddir/$machine/$hash\_.rrd $rrddir/$machine/$hash.def $imgdir/$machine/$hash.png\n");
369	tdb	1.1	next;
370			}
371			# look through to see how many internal queues we have
372			my($i) = 0;
373			while(defined $xmlhash{"packet.queue.attributes.queue$i"}) {
374			# see if the queue has been removed
375			if($xmlhash{"packet.queue.attributes.queue$i"} eq "[deleted]") {
376			# delete the queues rrd
377			unlink "$rrddir/$machine/$hash\_$i.rrd";
378	tdb	1.3	&log("deleted $rrddir/$machine/$hash\_$i.rrd\n");
379	tdb	1.1	# are there any other rrd's left on this queue? if not, cleanup.
380			# get a list of any that may be still there..
381			opendir(DIR, "$rrddir/$machine");
382			my(@rrdcountfiles) = grep { -f "$rrddir/$machine/$_" && /^$hash\_\d+.rrd$/ } readdir(DIR);
383			closedir DIR;
384			# count them (+1 because an empty array is size -1)
385			my($rrdcount) = $#rrdcountfiles + 1;
386			if($rrdcount == 0) {
387			# clean up the def file and any images
388			unlink "$rrddir/$machine/$hash.def", <$imgdir/$machine/$hash*.png>;
389	tdb	1.3	&log("deleted $rrddir/$machine/$hash.def $imgdir/$machine/$hash*.png\n");
390	tdb	1.1	}
391			++$i;
392			next;
393			}
394			# the &updaterrd will also do this check, but we want
395			# to write our def file out first
396			if( ! -f "$rrddir/$machine/$hash\_$i.rrd" ) {
397			open(DEF, ">$rrddir/$machine/$hash.def");
398			print DEF $name;
399			close DEF;
400	tdb	1.3	&log("created $rrddir/$machine/$hash.def\n");
401	tdb	1.1	}
402			my(@data) = ( "packet.queue.attributes.queue$i:size:GAUGE",
403			"packet.queue.attributes.total:total:COUNTER",
404			);
405			&updaterrd($machine, "$hash\_$i", $date, $rrdstep, \%xmlhash, @data);
406			++$i;
407			}
408			}
409			else {
410	tdb	1.3	#&error("SKIPPED: valid xml, but not a data or statistics packet\n");
411	tdb	1.1	}
412			}
413
414			# we'll now return from this sub and reconnect
415	tdb	1.3	&error("Data channel socket gave no data, bailing out...\n");
416	tdb	1.1	}
417
418			#
419			# sub to update an rrd file
420			#
421			# $machine = name of the machine
422			# (eg. kernow.ukc.ac.uk)
423			# $type = the type of graph for the machine
424			# (eg. cpu)
425			# $date = the date of the item we want to add
426			# (in seconds since the epoch)
427			# $step = the interval at which the database steps
428			# used when we create a new rrd
429			# $xmlref = reference to the xml data packet
430			# @data = array containing data items to add
431			# (eg. "packet.cpu.user:user:GAUGE")
432			#
433			sub updaterrd() {
434			my($machine, $type, $date, $step, $xmlref, @data) = @_;
435			# get hold of the xmlhash we have a reference to
436			my(%xmlhash) = %$xmlref;
437			# check if we need to create a new rrd
438			if( ! -f "$rrddir/$machine/$type.rrd") {
439			my(@createdata);
440			# pull the details out of the data we've been given
441			foreach my $dataitem (@data) {
442			if($dataitem =~ /^\S+:(\S+):(\S+)$/) {
443			push @createdata, "$1:$2";
444			}
445			}
446			# call the &makerrd to actually create the rrd
447	tdb	1.3	&log("making new rrd for $rrddir/$machine/$type.rrd\n");
448	tdb	1.1	&makerrd($machine, $type, $date, $step, @createdata);
449			}
450			# get the details out of the data we've been given
451			my($updateparams) = "$date";
452			foreach my $dataitem (@data) {
453			if($dataitem =~ /^(\S+):\S+:\S+$/) {
454			# pull the values straight out of the xmlhash
455			my($value) = $xmlhash{$1};
456			# if it's undefined we'll set it to 0
457			# this probably shouldn't happen, but it'd be best to handle it "nicely" :)
458			$value = "0" if not defined $value;
459			$updateparams .= ":$value";
460			}
461			}
462			# perform the update
463			RRDs::update ("$rrddir/$machine/$type.rrd", $updateparams);
464	tdb	1.3	&log("updating $rrddir/$machine/$type.rrd\n");
465	tdb	1.1	my($err) = RRDs::error;
466	tdb	1.3	&error("Error updating $rrddir/$machine/$type.rrd: $err\n") if $err;
467	tdb	1.1	}
468
469			#
470			# sub to create a new rrd file
471			#
472			# $machine = name of the machine
473			# (eg. kernow.ukc.ac.uk)
474			# $type = the type of graph for the machine
475			# (eg. cpu)
476			# $start = the date of the first item we want to add
477			# (in seconds since the epoch)
478			# $step = the interval at which the database steps
479			# @data = the data items we want to put in the rrd
480			# in the form: $dsname:dstype
481			# (eg. "size:GAUGE")
482			#
483			sub makerrd() {
484			my($machine, $type, $start, $step, @data) = @_;
485			# check if directory exists for rrd
486			if(! -d "$rrddir/$machine") {
487			# not sure on this umask, but it seems to work?
488			mkdir "$rrddir/$machine", 0777;
489	tdb	1.3	&log("created directory $rrddir/$machine\n");
490	tdb	1.1	}
491			my(@rrdcmd);
492			# we'll want to add our first data item at $start,
493			# so we start our rrd $step before that.
494			$start -= $step;
495			push @rrdcmd, "$rrddir/$machine/$type.rrd";
496			push @rrdcmd, "--start=$start";
497			push @rrdcmd, "--step=$step";
498			foreach my $dataitem (@data) {
499			# dataitem should be: "dsname:dstype"
500			if($dataitem =~ /^(\S+):(\S+)$/) {
501			push @rrdcmd, "DS:$1:$2:600:U:U";
502			}
503			}
504			push @rrdcmd, (
505			# 3h in 15s samples
506			"RRA:AVERAGE:0.5:1:720",
507			"RRA:MAX:0.5:1:720",
508			# 1d in 2m samples
509			"RRA:AVERAGE:0.5:8:720",
510			"RRA:MAX:0.5:8:720",
511			# 1w in 15m samples
512			"RRA:AVERAGE:0.5:60:672",
513			"RRA:MAX:0.5:60:672",
514			# 1m in 1hr samples
515			"RRA:AVERAGE:0.5:240:744",
516			"RRA:MAX:0.5:240:744",
517			# 1y in 12hr samples
518			"RRA:AVERAGE:0.5:2880:730",
519			"RRA:MAX:0.5:2880:730",
520			);
521			RRDs::create (@rrdcmd);
522			my($err) = RRDs::error;
523	tdb	1.3	&error("Error creating rrd for $rrddir/$machine/$type: $err\n") if $err;
524			}
525
526			# prints out usage information then exits
527			sub usage() {
528			print "Usage: watch.pl [options] i-scream_client_interface port\n";
529			print "Options\n";
530			print " -c config Specifies the configuration file\n";
531			print " default: rrdgraphing.conf\n";
532			print " -v Be verbose about what's happening\n";
533			print " -q Be quiet, even supress errors\n";
534			print " -V Print version number\n";
535			print " -h Prints this help page\n";
536			exit(1);
537			}
538
539			# prints a log message if verbose is turned on
540			sub log() {
541			my($msg) = @_;
542			print $msg if $verbose;
543			}
544
545			# prints an error message unless quiet is turned on
546			sub error() {
547			my($msg) = @_;
548			print STDERR $msg unless $quiet;
549	tdb	1.1	}