I am producing an rrd graph and I am facing 2 problems.
Problem 1: The numbers that I am printing they are integers without decimals, although when they are printed decimals appear. It is really confusing. So I looked online on the rrdgraph_graph and although that I am using the correct syntax and I am not applying any calculations I still do get floating values instead of integers.
According to the official website: %s place this after %le, %lf or %lg. This will be replaced by the appropriate SI magnitude unit and the value will be scaled accordingly (123456 -> 123.456 k).
I have attached a photo as sample of the output. I have also provide a working example code so if anyone understands the RRD's can view possible the error.
Problem 2: I was trying to add on my graph the VRULE:time#color[:legend][:dashes[=on_s[,off_s[,on_s,off_s]...]][:dash-offset=offset]] function and based on the online instructions I can supply the time. Since my graph is shifting I was planning to do time (value) - 1800 sec. I wanted to place a vertical line in the middle of the graph so I could view approximately an average on 30 minutes values. When I am applying such a format I get this error:
<b>Graph error: </b>parameter '1400274668-1800' does not represent time in line VRULE:1400274668-1800#0000CD:Half way values
When I remove the subtraction everything work fine. Is there a way to produce this line in the middle of my graph?
<?php
$file = "snmp";
$rrdFile = dirname(__FILE__) . "/".$file.".rrd";
$in = "losses";
$png = "/home/linux/Desktop/";
$in_min = "vdef_in_min";
$in_max = "vdef_in_max";
$in_lst = "vdef_in_lst";
$in_av = "vdef_in_av";
$title = "Losses RRD::Graph";
$output = array("1h","1d");
$step = 5;
$heartbeat = 2 * $step;
while (1) {
sleep (1);
$options = array(
"--start","now -15s",
"--step", "".$step."",
"DS:".$in.":GAUGE:".$heartbeat.":0:U",
"RRA:LAST:0.5:1:3600",
"RRA:MIN:0.5:1:3600",
"RRA:MAX:0.5:1:3600",
"RRA:AVERAGE:0.5:6:600",
"RRA:LAST:0.5:300:288",
"RRA:MIN:0.5:300:288",
"RRA:MAX:0.5:300:288`",
"RRA:AVERAGE:0.5:600:144"
);
if ( !isset( $create ) ) {
$create = rrd_create(
"".$rrdFile."",
$options
);
if ( $create === FALSE ) {
echo "Creation error: ".rrd_error()."\n";
}
}
$t = time();
$losses = rand(0, 150);
$update = rrd_update(
"".$rrdFile."",
array(
"".$t.":".$losses.""
)
);
if ($update === FALSE) {
echo "Update error: ".rrd_error()."\n";
}
date_default_timezone_set('Europe/Stockholm');
$timezone = new DateTime(NULL, new DateTimeZone('Europe/Stockholm'));
$date = date('l jS \of F Y h\\:i\\:s A' , $timezone->format('U'));
$comment = "RRD last updated:".$date;
$comment = str_replace( ":", "\\:", $comment );
$graph = "Graph last updated:".$date;
$graph = str_replace( ":", "\\:", $graph );
foreach ($output as $test) {
$final = array(
"--start","end - ".$test."",
"--end", "".$t."",
"--title=".$file." RRD::Graph with - ".$test." Periods",
"--vertical-label=Bytes(s)/sec",
"--right-axis-label=latency(ms)",
"--alt-y-grid", "--rigid",
"--width", "800", "--height", "500",
"--lower-limit=0",
"--no-gridfit",
"--slope-mode",
"DEF:".$in."_def=".$file.".rrd:".$in.":LAST",
"CDEF:inbytes=".$in."_def",
"VDEF:".$in_lst."=inbytes,LAST",
"VDEF:".$in_min."=inbytes,MINIMUM",
"VDEF:".$in_max."=inbytes,MAXIMUM",
"VDEF:".$in_av."=inbytes,AVERAGE",
"COMMENT:\\n",
"LINE2:".$in."_def#FF0000:".$in."",
"GPRINT:".$in_min.": Minimum\:%6.2lf %S",
"GPRINT:".$in_max.":Maximum\:%6.2lf %S",
"GPRINT:".$in_lst.":Last\:%6.2lf %s",
"GPRINT:".$in_av.":Average\:%6.2lf %s",
"COMMENT:\\n",
"VRULE:".$t."#0000CD:Half way values",
"COMMENT:\\n",
"HRULE:50#FFFF00:Maximum value",
"COMMENT:\\n",
"COMMENT: ",
"COMMENT:\\n",
"COMMENT:".$comment."\\r",
"COMMENT:".$graph."\\r"
);
$outputPngFile = rrd_graph(
"".$png."".$test.".png",
$final
);
if ($outputPngFile === FALSE) {
echo "<b>Graph error: </b>".rrd_error()."\n";
}
}
$debug = rrd_lastupdate (
"".$rrdFile.""
);
if ($debug === FALSE) {
echo "<b>Graph result error: </b>".rrd_error()."\n";
}
var_dump ($debug);
}
?>
