reports/graphing/watch.pl

#!/usr/bin/perl -w

# -----------------------------------------------------------
# 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.
#
# $Author$
# $Id$
#------------------------------------------------------------

$| = 1;

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

# Base directory for images
# (a directory will be constructed for each host under this)
my($imgdir) = "/home/tdb/public_html/rrd";

# Location of RRD databases
my($rrddir) = "/u1/i-scream/rrd";

# for reference:
# ch -> hex: $hex = sprintf("%02x", ord($ch));
# hex -> ch: $ch = chr(hex($hex));

# / converted to a decimal then hex'd
my($hex_slash) = "_2f";
# _ converted to a decimal then hex'd
my($hex_underscore) = "_5f";

if (@ARGV != 2) {
    die "Usage: ihost.pl [i-scream client interface] [TCP port]\n";
}

my($addr) = $ARGV[0];
my($cport) = $ARGV[1];

my($csock) = new IO::Socket::INET(
    PeerAddr => $addr,
    PeerPort => $cport,
    Proto => 'tcp'
    ) or die "Cannot connect!";

if (!defined $csock) {
    print "ERROR: Could not connect to $addr:$cport.\n";
    print "Please check that there is an i-scream server at this address.\n";
    exit(1);
}

my($response);

$response = <$csock>;
if ($response && $response ne "PROTOCOL 1.1\n") {
    print "The i-scream server sent an unexpected protocol id: $response\n";
    close($csock);
    exit(1);
}

print $csock "cpugrapher\n";
$response = <$csock>;
if ($response && $response ne "OK\n") {
    print "Received unexpected response: $response\n";
    close($csock);
    exit(1);
}

print $csock "STARTDATA\n";
$response = <$csock>;

chop $response;
print "Asked to connect to port $response on $addr, connecting...\n";

my($dport) = $response;

my($dsock) = new IO::Socket::INET(
    PeerAddr => $addr,
    PeerPort => $dport,
    Proto => 'tcp'
    ) or die "Cannot connect!";

if (!defined $dsock) {
    print "ERROR: Could not connect to $addr:$dport.\n";
    print "Failure in communications.\n";
    close($csock);
    exit(1);
}

## below here has been "improved"
## above is still a mess ;)

while(1) {
    # read data
    $response = <$dsock>;
    
    # attemp to parse the data
    my($err, %xmlhash) = &iscream::XMLParser::parse($response);
    if($err) {
        print STDERR "Skipped, XML did not parse: $response";
        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;
        }
        
        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, 15, \%xmlhash, @data);
               
        # mem
        @data = ( "packet.memory.free:free:GAUGE",
                  "packet.memory.total:total:GAUGE",
                 );
        &updaterrd($machine, "mem", $date, 15, \%xmlhash, @data);
                
        # load
        @data = ( "packet.load.load1:load1:GAUGE",
                  "packet.load.load5:load5:GAUGE",
                  "packet.load.load15:load15:GAUGE",
                 );
        &updaterrd($machine, "load", $date, 15, \%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, 15, \%xmlhash, @data);
        
        # swap
        @data = ( "packet.swap.free:free:GAUGE",
                  "packet.swap.total:total:GAUGE",
                 );
        &updaterrd($machine, "swap", $date, 15, \%xmlhash, @data);
        
        # users
        @data = ( "packet.users.count:count:GAUGE",
                 );
        &updaterrd($machine, "users", $date, 15, \%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", $date, 15, \%xmlhash, @data);
            ++$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;
        }
        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>;
            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";
                # 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>;
                }
                ++$i;
                next;
            }
            # the &updaterrd will also do this check, but we want
            # to write our def file out first
            if( ! -f "$rrddir/$machine/$hash\_$i.rrd" ) {
                open(DEF, ">$rrddir/$machine/$hash.def");
                print DEF $name;
                close DEF;
            }
            my(@data) = ( "packet.queue.attributes.queue$i:size:GAUGE",
                          "packet.queue.attributes.total:total:GAUGE",
                         );
            &updaterrd($machine, "$hash\_$i", $date, 15, \%xmlhash, @data);
            ++$i;
        }
    }
    else {
        #print "SKIPPED: valid xml, but not a data or statistics packet\n";
    }
}

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


#
# 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
        print "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
            $updateparams .= ":$xmlhash{$1}";
        }
    }
    # perform the update
    RRDs::update ("$rrddir/$machine/$type.rrd", $updateparams);
    my($err) = RRDs::error;
    print STDERR "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;
    }
    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:$2:600:U:U";
        }
    }
    push @rrdcmd, (
        # 3h in 15s samples
        "RRA:AVERAGE:0.5:1:720",
        "RRA:MAX:0.5:1:720",
        # 1d in 2m samples
        "RRA:AVERAGE:0.5:8:720",
        "RRA:MAX:0.5:8:720",
        # 1w in 15m samples
        "RRA:AVERAGE:0.5:60:672",
        "RRA:MAX:0.5:60:672",
        # 1m in 1hr samples
        "RRA:AVERAGE:0.5:240:744",
        "RRA:MAX:0.5:60:744",
    );
    RRDs::create (@rrdcmd);
    my($err) = RRDs::error;
    print STDERR "Error creating rrd for $rrddir/$machine/$type: $err\n" if $err;
}
Revision:	1.2
Committed:	Sun Mar 10 00:26:24 2002 UTC (22 years, 2 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+219 -253 lines
Log Message:	Rewritten most of the processing part. Now uses subroutines to avoid a lot of unnecessary code duplication. Much tidier, and easier to follow. Maybe this, and graph.pl, would benefit from an external configuration? maybe... Still need to tidy the connection handling part, it could bail out without much notice. It would be better if it kept retrying - ihost style ;)
#	User	Rev	Content
1	tdb	1.1	#!/usr/bin/perl -w
2
3	tdb	1.2	# -----------------------------------------------------------
4			# i-scream graph generation scripts
5			# http://www.i-scream.org.uk
6			#
7			# Generates rrd databases for i-scream data by connecting to
8			# the i-scream server and collecting data.
9			#
10			# $Author$
11			# $Id$
12			#------------------------------------------------------------
13
14	tdb	1.1	$\| = 1;
15
16			use strict;
17			use iscream::XMLParser;
18			use IO::Socket;
19			use RRDs;
20
21	tdb	1.2	# Base directory for images
22			# (a directory will be constructed for each host under this)
23			my($imgdir) = "/home/tdb/public_html/rrd";
24
25			# Location of RRD databases
26			my($rrddir) = "/u1/i-scream/rrd";
27
28			# for reference:
29			# ch -> hex: $hex = sprintf("%02x", ord($ch));
30			# hex -> ch: $ch = chr(hex($hex));
31
32			# / converted to a decimal then hex'd
33			my($hex_slash) = "_2f";
34			# _ converted to a decimal then hex'd
35			my($hex_underscore) = "_5f";
36
37	tdb	1.1	if (@ARGV != 2) {
38			die "Usage: ihost.pl [i-scream client interface] [TCP port]\n";
39			}
40
41			my($addr) = $ARGV[0];
42			my($cport) = $ARGV[1];
43
44			my($csock) = new IO::Socket::INET(
45			PeerAddr => $addr,
46			PeerPort => $cport,
47			Proto => 'tcp'
48			) or die "Cannot connect!";
49
50			if (!defined $csock) {
51			print "ERROR: Could not connect to $addr:$cport.\n";
52			print "Please check that there is an i-scream server at this address.\n";
53			exit(1);
54			}
55
56			my($response);
57
58			$response = <$csock>;
59			if ($response && $response ne "PROTOCOL 1.1\n") {
60			print "The i-scream server sent an unexpected protocol id: $response\n";
61			close($csock);
62			exit(1);
63			}
64
65			print $csock "cpugrapher\n";
66			$response = <$csock>;
67			if ($response && $response ne "OK\n") {
68			print "Received unexpected response: $response\n";
69			close($csock);
70			exit(1);
71			}
72
73			print $csock "STARTDATA\n";
74			$response = <$csock>;
75
76			chop $response;
77			print "Asked to connect to port $response on $addr, connecting...\n";
78
79			my($dport) = $response;
80
81			my($dsock) = new IO::Socket::INET(
82			PeerAddr => $addr,
83			PeerPort => $dport,
84			Proto => 'tcp'
85			) or die "Cannot connect!";
86
87			if (!defined $dsock) {
88			print "ERROR: Could not connect to $addr:$dport.\n";
89			print "Failure in communications.\n";
90			close($csock);
91			exit(1);
92			}
93
94	tdb	1.2	## below here has been "improved"
95			## above is still a mess ;)
96
97	tdb	1.1	while(1) {
98	tdb	1.2	# read data
99	tdb	1.1	$response = <$dsock>;
100	tdb	1.2
101			# attemp to parse the data
102	tdb	1.1	my($err, %xmlhash) = &iscream::XMLParser::parse($response);
103			if($err) {
104	tdb	1.2	print STDERR "Skipped, XML did not parse: $response";
105			next;
106	tdb	1.1	}
107	tdb	1.2
108			# standard data packet
109	tdb	1.1	if($xmlhash{"packet.attributes.type"} eq "data") {
110			my($machine) = $xmlhash{"packet.attributes.machine_name"};
111			my($date) = $xmlhash{"packet.attributes.date"};
112	tdb	1.2
113	tdb	1.1	# make directory for machine
114	tdb	1.2	if(! -d "$rrddir/$machine") {
115	tdb	1.1	# not sure on this umask, but it seems to work?
116	tdb	1.2	mkdir "$rrddir/$machine", 0777;
117	tdb	1.1	}
118	tdb	1.2
119			my(@data);
120
121	tdb	1.1	# cpu
122	tdb	1.2	@data = ( "packet.cpu.idle:idle:GAUGE",
123			"packet.cpu.user:user:GAUGE",
124			"packet.cpu.kernel:kernel:GAUGE",
125			"packet.cpu.swap:swap:GAUGE",
126			"packet.cpu.iowait:iowait:GAUGE",
127			);
128			&updaterrd($machine, "cpu", $date, 15, \%xmlhash, @data);
129
130	tdb	1.1	# mem
131	tdb	1.2	@data = ( "packet.memory.free:free:GAUGE",
132			"packet.memory.total:total:GAUGE",
133			);
134			&updaterrd($machine, "mem", $date, 15, \%xmlhash, @data);
135
136	tdb	1.1	# load
137	tdb	1.2	@data = ( "packet.load.load1:load1:GAUGE",
138			"packet.load.load5:load5:GAUGE",
139			"packet.load.load15:load15:GAUGE",
140			);
141			&updaterrd($machine, "load", $date, 15, \%xmlhash, @data);
142
143	tdb	1.1	# processes
144	tdb	1.2	@data = ( "packet.processes.cpu:cpu:GAUGE",
145			"packet.processes.sleeping:sleeping:GAUGE",
146			"packet.processes.stopped:stopped:GAUGE",
147			"packet.processes.total:total:GAUGE",
148			"packet.processes.zombie:zombie:GAUGE",
149			);
150			&updaterrd($machine, "proc", $date, 15, \%xmlhash, @data);
151
152	tdb	1.1	# swap
153	tdb	1.2	@data = ( "packet.swap.free:free:GAUGE",
154			"packet.swap.total:total:GAUGE",
155			);
156			&updaterrd($machine, "swap", $date, 15, \%xmlhash, @data);
157
158	tdb	1.1	# users
159	tdb	1.2	@data = ( "packet.users.count:count:GAUGE",
160			);
161			&updaterrd($machine, "users", $date, 15, \%xmlhash, @data);
162
163	tdb	1.1	# disk
164			my($i) = 0;
165			while(defined $xmlhash{"packet.disk.p$i.attributes.mount"}) {
166			my($mount) = $xmlhash{"packet.disk.p$i.attributes.mount"};
167	tdb	1.2	$mount =~ s/_/$hex_underscore/g;
168			$mount =~ s/\//$hex_slash/g;
169			@data = ( "packet.disk.p$i.attributes.kbytes:kbytes:GAUGE",
170			"packet.disk.p$i.attributes.used:used:GAUGE",
171			);
172			&updaterrd($machine, "disk-$mount", $date, 15, \%xmlhash, @data);
173	tdb	1.1	++$i;
174			}
175			}
176	tdb	1.2
177			# queue statistics packet
178	tdb	1.1	elsif($xmlhash{"packet.attributes.type"} eq "queueStat") {
179	tdb	1.2	# psuedo machine for internal server stuff
180			my($machine) = "i-scream-server";
181	tdb	1.1	# make directory
182	tdb	1.2	if(! -d "$rrddir/$machine") {
183	tdb	1.1	# not sure on this umask, but it seems to work?
184	tdb	1.2	mkdir "$rrddir/$machine", 0777;
185	tdb	1.1	}
186	tdb	1.2	my($hash) = $xmlhash{"packet.attributes.hashCode"};
187			my($date) = $xmlhash{"packet.attributes.date"};
188			my($name) = $xmlhash{"packet.attributes.name"};
189	tdb	1.1	# take a look to see if we have a shutdown packet...
190			if($xmlhash{"packet.attributes.shutdown"} && $xmlhash{"packet.attributes.shutdown"} eq "true") {
191	tdb	1.2	unlink <$rrddir/$machine/$hash\_.rrd>, "$rrddir/$machine/$hash.def", <$imgdir/$machine/$hash.png>;
192	tdb	1.1	next;
193			}
194	tdb	1.2	# look through to see how many internal queues we have
195	tdb	1.1	my($i) = 0;
196			while(defined $xmlhash{"packet.queue.attributes.queue$i"}) {
197			# see if the queue has been removed
198	tdb	1.2	if($xmlhash{"packet.queue.attributes.queue$i"} eq "[deleted]") {
199			# delete the queues rrd
200			unlink "$rrddir/$machine/$hash\_$i.rrd";
201			# are there any other rrd's left on this queue? if not, cleanup.
202			# get a list of any that may be still there..
203			opendir(DIR, "$rrddir/$machine");
204			my(@rrdcountfiles) = grep { -f "$rrddir/$machine/$_" && /^$hash\_\d+.rrd$/ } readdir(DIR);
205			closedir DIR;
206			# count them (+1 because an empty array is size -1)
207			my($rrdcount) = $#rrdcountfiles + 1;
208	tdb	1.1	if($rrdcount == 0) {
209	tdb	1.2	# clean up the def file and any images
210			unlink "$rrddir/$machine/$hash.def", <$imgdir/$machine/$hash*.png>;
211	tdb	1.1	}
212	tdb	1.2	++$i;
213			next;
214	tdb	1.1	}
215	tdb	1.2	# the &updaterrd will also do this check, but we want
216			# to write our def file out first
217			if( ! -f "$rrddir/$machine/$hash\_$i.rrd" ) {
218			open(DEF, ">$rrddir/$machine/$hash.def");
219			print DEF $name;
220			close DEF;
221	tdb	1.1	}
222	tdb	1.2	my(@data) = ( "packet.queue.attributes.queue$i:size:GAUGE",
223			"packet.queue.attributes.total:total:GAUGE",
224			);
225			&updaterrd($machine, "$hash\_$i", $date, 15, \%xmlhash, @data);
226	tdb	1.1	++$i;
227			}
228			}
229			else {
230	tdb	1.2	#print "SKIPPED: valid xml, but not a data or statistics packet\n";
231	tdb	1.1	}
232			}
233
234	tdb	1.2	# we'll never reach here... unless 1 becomes false for some reason ;)
235	tdb	1.1	exit 0;
236
237
238	tdb	1.2	#
239			# sub to update an rrd file
240			#
241			# $machine = name of the machine
242			# (eg. kernow.ukc.ac.uk)
243			# $type = the type of graph for the machine
244			# (eg. cpu)
245			# $date = the date of the item we want to add
246			# (in seconds since the epoch)
247			# $step = the interval at which the database steps
248			# used when we create a new rrd
249			# $xmlref = reference to the xml data packet
250			# @data = array containing data items to add
251			# (eg. "packet.cpu.user:user:GAUGE")
252			#
253			sub updaterrd() {
254			my($machine, $type, $date, $step, $xmlref, @data) = @_;
255			# get hold of the xmlhash we have a reference to
256			my(%xmlhash) = %$xmlref;
257			# check if we need to create a new rrd
258			if( ! -f "$rrddir/$machine/$type.rrd") {
259			my(@createdata);
260			# pull the details out of the data we've been given
261			foreach my $dataitem (@data) {
262			if($dataitem =~ /^\S+:(\S+):(\S+)$/) {
263			push @createdata, "$1:$2";
264			}
265			}
266			# call the &makerrd to actually create the rrd
267			print "making new rrd for $rrddir/$machine/$type.rrd\n";
268			&makerrd($machine, $type, $date, $step, @createdata);
269			}
270			# get the details out of the data we've been given
271			my($updateparams) = "$date";
272			foreach my $dataitem (@data) {
273			if($dataitem =~ /^(\S+):\S+:\S+$/) {
274			# pull the values straight out of the xmlhash
275			$updateparams .= ":$xmlhash{$1}";
276			}
277			}
278			# perform the update
279			RRDs::update ("$rrddir/$machine/$type.rrd", $updateparams);
280			my($err) = RRDs::error;
281			print STDERR "Error updating $rrddir/$machine/$type.rrd: $err\n" if $err;
282			}
283
284			#
285			# sub to create a new rrd file
286			#
287			# $machine = name of the machine
288			# (eg. kernow.ukc.ac.uk)
289			# $type = the type of graph for the machine
290			# (eg. cpu)
291			# $start = the date of the first item we want to add
292			# (in seconds since the epoch)
293			# $step = the interval at which the database steps
294			# @data = the data items we want to put in the rrd
295			# in the form: $dsname:dstype
296			# (eg. "size:GAUGE")
297			#
298			sub makerrd() {
299			my($machine, $type, $start, $step, @data) = @_;
300			# check if directory exists for rrd
301			if(! -d "$rrddir/$machine") {
302			# not sure on this umask, but it seems to work?
303			mkdir "$rrddir/$machine", 0777;
304			}
305			my(@rrdcmd);
306			# we'll want to add our first data item at $start,
307			# so we start our rrd $step before that.
308			$start -= $step;
309			push @rrdcmd, "$rrddir/$machine/$type.rrd";
310			push @rrdcmd, "--start=$start";
311			push @rrdcmd, "--step=$step";
312			foreach my $dataitem (@data) {
313			# dataitem should be: "dsname:dstype"
314			if($dataitem =~ /^(\S+):(\S+)$/) {
315			push @rrdcmd, "DS:$1:$2:600:U:U";
316			}
317			}
318			push @rrdcmd, (
319			# 3h in 15s samples
320			"RRA:AVERAGE:0.5:1:720",
321			"RRA:MAX:0.5:1:720",
322			# 1d in 2m samples
323			"RRA:AVERAGE:0.5:8:720",
324			"RRA:MAX:0.5:8:720",
325			# 1w in 15m samples
326			"RRA:AVERAGE:0.5:60:672",
327			"RRA:MAX:0.5:60:672",
328			# 1m in 1hr samples
329			"RRA:AVERAGE:0.5:240:744",
330			"RRA:MAX:0.5:60:744",
331			);
332			RRDs::create (@rrdcmd);
333			my($err) = RRDs::error;
334			print STDERR "Error creating rrd for $rrddir/$machine/$type: $err\n" if $err;
335	tdb	1.1	}