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# |
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# i-scream central monitoring system |
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# http://www.i-scream.org.uk |
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# Copyright (C) 2000-2002 i-scream |
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# |
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# This program is free software; you can redistribute it and/or |
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# $Id$ |
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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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my($version) = '$Id$'; |
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$| = 1; |
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use strict; |
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use iscream::XMLParser; |
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use Getopt::Std; |
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use IO::Socket; |
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use iscream::XMLParser; |
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use RRDs; |
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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($imgdir) = "/home/pkg/iscream/public_html/graphs"; |
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# define variables that will be read from the config |
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# nb. keep this insync with the config file! |
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use vars qw{ |
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$imgdir $rrddir |
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$maxrrdage $maximgage $deleterrds $deleteimgs |
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$hex_slash $hex_underscore |
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$rrdstep $retry_wait |
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$verbose $quiet |
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}; |
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# Location of RRD databases |
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my($rrddir) = "/u1/i-scream/databases"; |
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# default locate of the config file |
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my($configfile) = "rrdgraphing.conf"; |
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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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# check for command line arguments |
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my(%opts); |
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my($ret) = getopts('hvqVc:', \%opts); |
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# / converted to a decimal then hex'd |
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my($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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# if invalid argument given, $ret will not be 1 |
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&usage() if $ret != 1; |
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# step interval in the rrd databases |
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my($rrdstep) = 15; |
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# first process the arguments which might mean we exit now |
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# time to wait (in seconds) before retrying a connection |
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my($retry_wait) = 10; |
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# -h is usage |
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if($opts{h}) { |
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&usage(); |
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} |
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# -V is version |
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if($opts{V}) { |
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print "watch.pl version: $version\n"; |
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exit(1); |
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} |
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# Then try getting the config |
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|
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# -c specifies the config file location |
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if($opts{c}) { |
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$configfile = $opts{c}; |
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} |
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# suck in the config |
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&log("reading config from $configfile\n"); |
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do $configfile; |
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|
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# Then any options we might want to override the config with |
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|
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# -v is verbose |
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if($opts{v}) { |
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$verbose = $opts{v}; |
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} |
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# -q is verbose |
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if($opts{q}) { |
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$quiet = $opts{q}; |
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# if we're meant to be quiet, we can hardly be verbose! |
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# $verbose = 0; |
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} |
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# Finally check for required arguments |
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|
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# check we still have two arguments left |
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if (@ARGV != 2) { |
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die "Usage: watch.pl [i-scream client interface] [TCP port]\n"; |
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&usage(); |
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} |
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# user supplied client interface server and port |
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my($addr) = $ARGV[0]; |
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my($cport) = $ARGV[1]; |
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# Main program loop |
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while(1) { |
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print "Connecting control channel to port $cport on $addr...\n"; |
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&log("Connecting control channel to port $cport on $addr...\n"); |
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# attempt to connect the control channel |
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my($csock) = new IO::Socket::INET( |
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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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&error("ERROR: Could not connect control channel to $addr:$cport.\n"); |
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&error("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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# 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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&log("CLI sent: $response"); |
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if ($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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&error("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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# send our identifier to the client interface |
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print $csock "rrdgraphing\n"; |
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&log("we sent: rrdgraphing\n"); |
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$response = <$csock>; |
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&log("CLI sent: $response"); |
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if ($response && $response ne "OK\n") { |
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print STDERR "Received unexpected response: $response\n"; |
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&error("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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# tell the client interface we'd like to start the data channel |
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print $csock "STARTDATA\n"; |
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&log("we sent: STARTDATA\n"); |
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# the response should be the socket to connect the data channel to |
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$response = <$csock>; |
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&log("CLI sent: $response"); |
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chomp $response; |
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my($dport) = $response; |
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print "Connecting data channel to port $dport on $addr...\n"; |
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&log("Connecting data channel to port $dport on $addr...\n"); |
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# attempt to connect the data channel |
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my($dsock) = new IO::Socket::INET( |
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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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&error("ERROR: Could not connect data channel to $addr:$dport.\n"); |
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&error("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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# 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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&error("Will retry connection to i-scream server in $retry_wait seconds.\n\n"); |
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sleep $retry_wait; |
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} |
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# attempt to parse the data |
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my($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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&error("Skipped, XML did not parse: $xml"); |
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next; |
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} |
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if(! -d "$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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&log("created directory $rrddir/$machine\n"); |
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} |
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my(@data); |
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@data = ( "packet.users.count:count:GAUGE", |
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); |
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&updaterrd($machine, "users", $date, $rrdstep, \%xmlhash, @data); |
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# paging |
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@data = ( "packet.pages.swapins:swapins:GAUGE", |
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"packet.pages.swapouts:swapouts:GAUGE", |
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); |
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&updaterrd($machine, "paging", $date, $rrdstep, \%xmlhash, @data); |
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# disk |
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my($i) = 0; |
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while(defined $xmlhash{"packet.disk.p$i.attributes.mount"}) { |
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$mount =~ s/\//$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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"packet.disk.p$i.attributes.totalinodes:totalinodes:GAUGE", |
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"packet.disk.p$i.attributes.freeinodes:freeinodes: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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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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&log("created directory $rrddir/$machine\n"); |
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} |
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my($hash) = $xmlhash{"packet.attributes.hashCode"}; |
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my($date) = $xmlhash{"packet.attributes.date"}; |
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# take a look to see if we have a shutdown packet... |
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if($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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&log("deleted $rrddir/$machine/$hash\_*.rrd $rrddir/$machine/$hash.def $imgdir/$machine/$hash*.png\n"); |
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next; |
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} |
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# look through to see how many internal queues we have |
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if($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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&log("deleted $rrddir/$machine/$hash\_$i.rrd\n"); |
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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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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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&log("deleted $rrddir/$machine/$hash.def $imgdir/$machine/$hash*.png\n"); |
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} |
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++$i; |
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next; |
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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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&log("created $rrddir/$machine/$hash.def\n"); |
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} |
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my(@data) = ( "packet.queue.attributes.queue$i:size:GAUGE", |
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"packet.queue.attributes.total:total:COUNTER", |
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} |
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} |
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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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#&error("SKIPPED: valid xml, but not a data or statistics packet\n"); |
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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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&error("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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} |
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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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&log("making new rrd for $rrddir/$machine/$type.rrd\n"); |
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&makerrd($machine, $type, $date, $step, @createdata); |
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} |
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# get the details out of the data we've been given |
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} |
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# perform the update |
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RRDs::update ("$rrddir/$machine/$type.rrd", $updateparams); |
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&log("updating $rrddir/$machine/$type.rrd\n"); |
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my($err) = RRDs::error; |
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print STDERR "Error updating $rrddir/$machine/$type.rrd: $err\n" if $err; |
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&error("Error updating $rrddir/$machine/$type.rrd: $err\n") if $err; |
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} |
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# |
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if(! -d "$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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&log("created directory $rrddir/$machine\n"); |
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} |
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my(@rrdcmd); |
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# we'll want to add our first data item at $start, |
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); |
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RRDs::create (@rrdcmd); |
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my($err) = RRDs::error; |
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print STDERR "Error creating rrd for $rrddir/$machine/$type: $err\n" if $err; |
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&error("Error creating rrd for $rrddir/$machine/$type: $err\n") if $err; |
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} |
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|
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# prints out usage information then exits |
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sub usage() { |
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print "Usage: watch.pl [options] i-scream_client_interface port\n"; |
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print "Options\n"; |
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print " -c config Specifies the configuration file\n"; |
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print " default: rrdgraphing.conf\n"; |
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print " -v Be verbose about what's happening\n"; |
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print " -q Be quiet, even supress errors\n"; |
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print " -V Print version number\n"; |
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print " -h Prints this help page\n"; |
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exit(1); |
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} |
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|
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# prints a log message if verbose is turned on |
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sub log() { |
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my($msg) = @_; |
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print $msg if $verbose; |
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} |
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|
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# prints an error message unless quiet is turned on |
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sub error() { |
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my($msg) = @_; |
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print STDERR $msg unless $quiet; |
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} |
