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#!/usr/bin/perl -w |
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|
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# ----------------------------------------------------------- |
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# i-scream graph generation scripts |
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# http://www.i-scream.org.uk |
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# |
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# Generates rrd databases for i-scream data by connecting to |
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# the i-scream server and collecting data. |
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# |
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# $Author$ |
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# $Id$ |
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#------------------------------------------------------------ |
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|
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## TODO |
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# ought to think about cleaning up when we restart? |
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# -- old queue data etc |
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|
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$| = 1; |
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|
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use strict; |
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use iscream::XMLParser; |
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use IO::Socket; |
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use RRDs; |
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|
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# Base directory for images |
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# (a directory will be constructed for each host under this) |
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my($imgdir) = "/home/tdb/public_html/rrd"; |
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|
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# Location of RRD databases |
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my($rrddir) = "/u1/i-scream/rrd"; |
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|
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# for reference: |
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# ch -> hex: $hex = sprintf("%02x", ord($ch)); |
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# hex -> ch: $ch = chr(hex($hex)); |
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|
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# / converted to a decimal then hex'd |
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my($hex_slash) = "_2f"; |
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# _ converted to a decimal then hex'd |
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my($hex_underscore) = "_5f"; |
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|
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# step interval in the rrd databases |
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my($rrdstep) = 15; |
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|
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# time to wait (in seconds) before retrying a connection |
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my($retry_wait) = 10; |
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|
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if (@ARGV != 2) { |
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die "Usage: watch.pl [i-scream client interface] [TCP port]\n"; |
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} |
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|
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# user supplied client interface server and port |
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my($addr) = $ARGV[0]; |
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my($cport) = $ARGV[1]; |
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|
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while(1) { |
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|
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print "Connecting control channel to port $cport on $addr...\n"; |
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|
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# attempt to connect the control channel |
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my($csock) = new IO::Socket::INET( |
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PeerAddr => $addr, |
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PeerPort => $cport, |
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Proto => 'tcp' |
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); |
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|
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# if socket isn't defined connection failed |
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if (!defined $csock) { |
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print STDERR "ERROR: Could not connect control channel to $addr:$cport.\n"; |
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print STDERR "Please check that there is an i-scream server at this address.\n"; |
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&wait_then_retry(); |
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next; |
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} |
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|
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my($response); |
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|
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# client interface should send it's protocol ID |
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# we know about "PROTOCOL 1.1", and will only accept the same |
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$response = <$csock>; |
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if ($response && $response ne "PROTOCOL 1.1\n") { |
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print STDERR "The i-scream server sent an unexpected protocol ID: $response\n"; |
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close($csock); |
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&wait_then_retry(); |
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next; |
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} |
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|
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# send our identifier to the client interface |
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print $csock "rrdgraphing\n"; |
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$response = <$csock>; |
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if ($response && $response ne "OK\n") { |
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print STDERR "Received unexpected response: $response\n"; |
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close($csock); |
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&wait_then_retry(); |
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next; |
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} |
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|
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# tell the client interface we'd like to start the data channel |
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print $csock "STARTDATA\n"; |
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|
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# the response should be the socket to connect the data channel to |
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$response = <$csock>; |
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chomp $response; |
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|
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my($dport) = $response; |
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print "Connecting data channel to port $dport on $addr...\n"; |
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|
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# attempt to connect the data channel |
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my($dsock) = new IO::Socket::INET( |
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PeerAddr => $addr, |
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PeerPort => $dport, |
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Proto => 'tcp' |
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) or die "arse?"; |
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|
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# if socket isn't defined connection failed |
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if (!defined $dsock) { |
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print STDERR "ERROR: Could not connect data channel to $addr:$dport.\n"; |
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print STDERR "Failure in communications.\n"; |
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close($csock); |
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&wait_then_retry(); |
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next; |
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} |
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|
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# the data channel should now be sending us data! |
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|
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# call sub to process data being received over the data channel |
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&processdata($dsock); |
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|
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# data processing has stopped, close sockets |
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close($csock); |
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close($dsock); |
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|
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# wait before retrying |
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&wait_then_retry(); |
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} |
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|
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# we'll never reach here... unless 1 becomes false for some reason ;) |
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exit 0; |
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|
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|
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# |
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# wait for a while before retrying |
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# |
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sub wait_then_retry() { |
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print STDERR "Will retry connection to i-scream server in $retry_wait seconds.\n\n"; |
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sleep $retry_wait; |
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} |
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|
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# |
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# Given the socket of the data channel will process all |
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# the incoming XML data, creating and updating the appropriate |
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# database files. |
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# |
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# $dsock = socket connected to the data channel |
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# |
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sub processdata() { |
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# the socket connected to the data channel |
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my($dsock) = @_; |
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# save us recreating this variable each time we loop |
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my($xml); |
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|
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while(1) { |
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# read data |
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$xml = <$dsock>; |
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|
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# something odd has happened |
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last if not defined $xml; |
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|
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# attempt to parse the data |
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my($err, %xmlhash) = &iscream::XMLParser::parse($xml); |
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if($err) { |
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print STDERR "Skipped, XML did not parse: $xml"; |
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next; |
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} |
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|
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# standard data packet |
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if($xmlhash{"packet.attributes.type"} eq "data") { |
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my($machine) = $xmlhash{"packet.attributes.machine_name"}; |
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my($date) = $xmlhash{"packet.attributes.date"}; |
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|
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# make directory for machine |
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if(! -d "$rrddir/$machine") { |
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# not sure on this umask, but it seems to work? |
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mkdir "$rrddir/$machine", 0777; |
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} |
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|
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my(@data); |
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|
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# cpu |
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@data = ( "packet.cpu.idle:idle:GAUGE", |
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"packet.cpu.user:user:GAUGE", |
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"packet.cpu.kernel:kernel:GAUGE", |
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"packet.cpu.swap:swap:GAUGE", |
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"packet.cpu.iowait:iowait:GAUGE", |
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); |
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&updaterrd($machine, "cpu", $date, $rrdstep, \%xmlhash, @data); |
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|
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# mem |
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@data = ( "packet.memory.free:free:GAUGE", |
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"packet.memory.total:total:GAUGE", |
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); |
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&updaterrd($machine, "mem", $date, $rrdstep, \%xmlhash, @data); |
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|
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# load |
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@data = ( "packet.load.load1:load1:GAUGE", |
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"packet.load.load5:load5:GAUGE", |
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"packet.load.load15:load15:GAUGE", |
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); |
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&updaterrd($machine, "load", $date, $rrdstep, \%xmlhash, @data); |
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|
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# processes |
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@data = ( "packet.processes.cpu:cpu:GAUGE", |
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"packet.processes.sleeping:sleeping:GAUGE", |
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"packet.processes.stopped:stopped:GAUGE", |
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"packet.processes.total:total:GAUGE", |
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"packet.processes.zombie:zombie:GAUGE", |
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); |
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&updaterrd($machine, "proc", $date, $rrdstep, \%xmlhash, @data); |
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|
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# swap |
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@data = ( "packet.swap.free:free:GAUGE", |
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"packet.swap.total:total:GAUGE", |
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); |
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&updaterrd($machine, "swap", $date, $rrdstep, \%xmlhash, @data); |
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|
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# users |
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@data = ( "packet.users.count:count:GAUGE", |
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); |
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&updaterrd($machine, "users", $date, $rrdstep, \%xmlhash, @data); |
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|
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# disk |
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my($i) = 0; |
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while(defined $xmlhash{"packet.disk.p$i.attributes.mount"}) { |
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my($mount) = $xmlhash{"packet.disk.p$i.attributes.mount"}; |
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$mount =~ s/_/$hex_underscore/g; |
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$mount =~ s/\//$hex_slash/g; |
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@data = ( "packet.disk.p$i.attributes.kbytes:kbytes:GAUGE", |
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"packet.disk.p$i.attributes.used:used:GAUGE", |
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); |
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&updaterrd($machine, "disk-$mount", $date, $rrdstep, \%xmlhash, @data); |
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++$i; |
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} |
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} |
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|
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# queue statistics packet |
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elsif($xmlhash{"packet.attributes.type"} eq "queueStat") { |
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# psuedo machine for internal server stuff |
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my($machine) = "i-scream-server"; |
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# make directory |
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if(! -d "$rrddir/$machine") { |
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# not sure on this umask, but it seems to work? |
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mkdir "$rrddir/$machine", 0777; |
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} |
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my($hash) = $xmlhash{"packet.attributes.hashCode"}; |
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my($date) = $xmlhash{"packet.attributes.date"}; |
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my($name) = $xmlhash{"packet.attributes.name"}; |
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# take a look to see if we have a shutdown packet... |
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if($xmlhash{"packet.attributes.shutdown"} && $xmlhash{"packet.attributes.shutdown"} eq "true") { |
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unlink <$rrddir/$machine/$hash\_*.rrd>, "$rrddir/$machine/$hash.def", <$imgdir/$machine/$hash*.png>; |
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next; |
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} |
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# look through to see how many internal queues we have |
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my($i) = 0; |
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while(defined $xmlhash{"packet.queue.attributes.queue$i"}) { |
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# see if the queue has been removed |
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if($xmlhash{"packet.queue.attributes.queue$i"} eq "[deleted]") { |
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# delete the queues rrd |
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unlink "$rrddir/$machine/$hash\_$i.rrd"; |
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# are there any other rrd's left on this queue? if not, cleanup. |
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# get a list of any that may be still there.. |
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opendir(DIR, "$rrddir/$machine"); |
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my(@rrdcountfiles) = grep { -f "$rrddir/$machine/$_" && /^$hash\_\d+.rrd$/ } readdir(DIR); |
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closedir DIR; |
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# count them (+1 because an empty array is size -1) |
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my($rrdcount) = $#rrdcountfiles + 1; |
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if($rrdcount == 0) { |
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# clean up the def file and any images |
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unlink "$rrddir/$machine/$hash.def", <$imgdir/$machine/$hash*.png>; |
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} |
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++$i; |
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next; |
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} |
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# the &updaterrd will also do this check, but we want |
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# to write our def file out first |
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if( ! -f "$rrddir/$machine/$hash\_$i.rrd" ) { |
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open(DEF, ">$rrddir/$machine/$hash.def"); |
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print DEF $name; |
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close DEF; |
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} |
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my(@data) = ( "packet.queue.attributes.queue$i:size:GAUGE", |
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"packet.queue.attributes.total:total:COUNTER", |
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); |
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&updaterrd($machine, "$hash\_$i", $date, $rrdstep, \%xmlhash, @data); |
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++$i; |
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} |
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} |
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else { |
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#print STDERR "SKIPPED: valid xml, but not a data or statistics packet\n"; |
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} |
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} |
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|
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# we'll now return from this sub and reconnect |
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print STDERR "Data channel socket gave no data, bailing out...\n"; |
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} |
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|
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# |
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# sub to update an rrd file |
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# |
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# $machine = name of the machine |
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# (eg. kernow.ukc.ac.uk) |
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# $type = the type of graph for the machine |
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# (eg. cpu) |
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# $date = the date of the item we want to add |
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# (in seconds since the epoch) |
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# $step = the interval at which the database steps |
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# used when we create a new rrd |
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# $xmlref = reference to the xml data packet |
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# @data = array containing data items to add |
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# (eg. "packet.cpu.user:user:GAUGE") |
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# |
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sub updaterrd() { |
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my($machine, $type, $date, $step, $xmlref, @data) = @_; |
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# get hold of the xmlhash we have a reference to |
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my(%xmlhash) = %$xmlref; |
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# check if we need to create a new rrd |
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if( ! -f "$rrddir/$machine/$type.rrd") { |
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my(@createdata); |
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# pull the details out of the data we've been given |
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foreach my $dataitem (@data) { |
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if($dataitem =~ /^\S+:(\S+):(\S+)$/) { |
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push @createdata, "$1:$2"; |
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} |
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} |
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# call the &makerrd to actually create the rrd |
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print "making new rrd for $rrddir/$machine/$type.rrd\n"; |
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&makerrd($machine, $type, $date, $step, @createdata); |
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} |
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# get the details out of the data we've been given |
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my($updateparams) = "$date"; |
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foreach my $dataitem (@data) { |
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if($dataitem =~ /^(\S+):\S+:\S+$/) { |
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# pull the values straight out of the xmlhash |
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$updateparams .= ":$xmlhash{$1}"; |
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} |
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} |
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# perform the update |
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RRDs::update ("$rrddir/$machine/$type.rrd", $updateparams); |
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my($err) = RRDs::error; |
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print STDERR "Error updating $rrddir/$machine/$type.rrd: $err\n" if $err; |
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} |
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|
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# |
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# sub to create a new rrd file |
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# |
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# $machine = name of the machine |
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# (eg. kernow.ukc.ac.uk) |
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# $type = the type of graph for the machine |
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# (eg. cpu) |
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# $start = the date of the first item we want to add |
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# (in seconds since the epoch) |
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# $step = the interval at which the database steps |
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# @data = the data items we want to put in the rrd |
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# in the form: $dsname:dstype |
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# (eg. "size:GAUGE") |
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# |
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sub makerrd() { |
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my($machine, $type, $start, $step, @data) = @_; |
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# check if directory exists for rrd |
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if(! -d "$rrddir/$machine") { |
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# not sure on this umask, but it seems to work? |
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mkdir "$rrddir/$machine", 0777; |
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} |
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my(@rrdcmd); |
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# we'll want to add our first data item at $start, |
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# so we start our rrd $step before that. |
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$start -= $step; |
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push @rrdcmd, "$rrddir/$machine/$type.rrd"; |
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push @rrdcmd, "--start=$start"; |
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push @rrdcmd, "--step=$step"; |
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foreach my $dataitem (@data) { |
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# dataitem should be: "dsname:dstype" |
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if($dataitem =~ /^(\S+):(\S+)$/) { |
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push @rrdcmd, "DS:$1:$2:600:U:U"; |
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} |
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} |
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push @rrdcmd, ( |
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# 3h in 15s samples |
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"RRA:AVERAGE:0.5:1:720", |
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"RRA:MAX:0.5:1:720", |
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# 1d in 2m samples |
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"RRA:AVERAGE:0.5:8:720", |
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"RRA:MAX:0.5:8:720", |
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# 1w in 15m samples |
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"RRA:AVERAGE:0.5:60:672", |
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"RRA:MAX:0.5:60:672", |
| 394 |
# 1m in 1hr samples |
| 395 |
"RRA:AVERAGE:0.5:240:744", |
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"RRA:MAX:0.5:60:744", |
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); |
| 398 |
RRDs::create (@rrdcmd); |
| 399 |
my($err) = RRDs::error; |
| 400 |
print STDERR "Error creating rrd for $rrddir/$machine/$type: $err\n" if $err; |
| 401 |
} |
