WebSVN - weathermap - Blame - Rev 51 - /lib/datasources/WeatherMapDataSource

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simandl

<?php

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// RRDtool datasource plugin.

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// gauge:filename.rrd:ds_in:ds_out

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// filename.rrd:ds_in:ds_out

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// filename.rrd:ds_in:ds_out

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//

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class WeatherMapDataSource_rrd extends WeatherMapDataSource {

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function Init(&$map)

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{

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if (file_exists($map->rrdtool)) {

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if((function_exists('is_executable')) && (!is_executable($map->rrdtool)))

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{

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warn("RRD DS: RRDTool exists but is not executable?\n");

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return(FALSE);

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}

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$map->rrdtool_check="FOUND";

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return(TRUE);

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}

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// normally, DS plugins shouldn't really pollute the logs

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// this particular one is important to most users though...

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if($map->context=='cli')

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{

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                        warn("RRD DS: Can't find RRDTOOL. Check line 29 of the 'weathermap' script.\nRRD-based TARGETs will fail.\n");

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}

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if($map->context=='cacti')

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{ // unlikely to ever occur

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warn("RRD DS: Can't find RRDTOOL. Check your Cacti config.\n");

}

return(FALSE);

}

function Recognise($targetstring)

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{

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if(preg_match("/^(.*\.rrd):([\-a-zA-Z0-9_]+):([\-a-zA-Z0-9_]+)$/",$targetstring,$matches))

{

return TRUE;

}

elseif(preg_match("/^(.*\.rrd)$/",$targetstring,$matches))

{

return TRUE;

}

else

{

return FALSE;

}

}

// Actually read data from a data source, and return it

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// returns a 3-part array (invalue, outvalue and datavalid time_t)

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// invalue and outvalue should be -1,-1 if there is no valid data

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// data_time is intended to allow more informed graphing in the future

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function ReadData($targetstring, &$map, &$item)

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{

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$in_ds = "traffic_in";

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$out_ds = "traffic_out";

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$rrdfile = $targetstring;

$multiplier = 8;

$inbw=-1;

$outbw=-1;

$data_time = 0;

if(preg_match("/^(.*\.rrd):([\-a-zA-Z0-9_]+):([\-a-zA-Z0-9_]+)$/",$targetstring,$matches))

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{

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$in_ds = $matches[2];

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$out_ds = $matches[3];

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$rrdfile = $matches[1];

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debug("Special DS names seen ($in_ds and $out_ds).\n");

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}

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if(preg_match("/^rrd:(.*)/",$rrdfile,$matches))

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{

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$rrdfile = $matches[1];

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}

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if(preg_match("/^gauge:(.*)/",$rrdfile,$matches))

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{

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$rrdfile = $matches[1];

$multiplier = 1;

}

// we get the last 800 seconds of data - this might be 1 or 2 lines, depending on when in the

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// cacti polling cycle we get run. This ought to stop the 'some lines are grey' problem that some

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// people were seeing

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// $item->add_note("rrdversion","1.3");

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if(file_exists($rrdfile))

{

if(1==1)

{

debug ("RRD ReadData: Target DS names are $in_ds and $out_ds\n");

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$period = intval($map->get_hint('rrd_period'));

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if($period == 0) $period = 800;

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$start = $map->get_hint('rrd_start');

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if($start == '') {

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$start = "now-$period";

$end = "now";

}

else

{

$end = "start+".$period;

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}

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                                $command = '"'.$map->rrdtool . '" fetch "'.$rrdfile.'" AVERAGE --start '.$start.' --end '.$end;

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$command=$map->rrdtool . " fetch $rrdfile AVERAGE --start $start --end $end";

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debug ("RRD ReadData: Running: $command\n");

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$pipe=popen($command, "r");

$lines=array ();

$count = 0;

$linecount = 0;

if (isset($pipe))

{

$headings=fgets($pipe, 4096);

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fgets($pipe, 4096); // skip the blank line

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$buffer='';

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while (!feof($pipe))

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{

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$line=fgets($pipe, 4096);

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debug ("> " . $line);

$buffer.=$line;

$lines[]=$line;

$linecount++;

}

pclose ($pipe);

debug("RRD ReadData: Read $linecount lines from rrdtool\n");

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$rlines=array_reverse($lines);

$gotline=0;

$theline='';

foreach ($rlines as $line)

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{

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debug ("--" . $line . "\n");

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$cols=preg_split("/\s+/", $line);

$dataok=1;

$ii=0;

foreach ($cols as $col)

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{

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# if( ! is_numeric($col) ) { $dataok=0; }

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                                                        if (trim($col) != '' && !preg_match('/^\d+\.?\d*e?[+-]?\d*:?$/i', $col))

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{

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$dataok=0;

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                                                                debug ("RRD ReadData: $ii: This isn't a number: [$col]\n");

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}

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# if($col=='nan') { $dataok=0; }

$ii++;

}

if ($gotline == 0 && $dataok == 1 && trim($line) != '')

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{

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debug ("RRD ReadData: Found a good line: $line ($headings)\n");

$theline=$line;

$gotline=1;

$countwas=$count;

}

$count++;

}

}

else

{

warn("RRD ReadData: failed to open pipe to RRDTool: ".$php_errormsg."\n");

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}

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if ($theline != '')

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{

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if ($countwas > 2) { warn

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                                                ("RRD ReadData: Data is not most recent entry ($countwas) for link: $targetstring\n"); }

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debug ("RRD ReadData: Our line is $theline\n");

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$cols=preg_split("/\s+/", $theline);

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// this replace fudges 1.2.x output to look like 1.0.x

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// then we can treat them both the same.

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$heads=preg_split("/\s+/", preg_replace("/^\s+/","timestamp ",$headings) );

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# $values = array_combine($heads,$cols);

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                                        for ($i=0, $cnt=count($cols); $i < $cnt; $i++) { $values[$heads[$i]] = $cols[$i]; }

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                                        // as long as no-one actually manages to create an RRD with a DS of '-', then this will just fall through to 0 for '-'

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if( isset($values[$in_ds]) || isset($values[$out_ds]) )

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{

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$inbw=0; $outbw=0;

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if(isset($values[$in_ds]) ) $inbw=$values[$in_ds] * $multiplier;

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if(isset($values[$out_ds]) ) $outbw=$values[$out_ds] * $multiplier;

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$data_time = $values['timestamp'];

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$data_time = preg_replace("/:/","",$data_time);

}

else

{

                                                warn("RRD ReadData: Neither of your DS names ($in_ds & $out_ds) were found, even though there was a valid data line. Maybe they are wrong?");

}

}

}

}

else

{