提前感谢您的时间和精力。这是我第一个使用 PHP 和 RRD 的脚本。当我为 SNMP 编写一个简短的程序时,我遇到了 RRD 一个强大的图形输出工具。我试图编写一个简短的操作脚本来模仿图形的输出。我从官方页面尽可能多地阅读了有关 RRD 的文档,并尝试将它们添加到我的 PHP 代码中。我在尝试调试代码时发现了一些函数,这些函数显示我的数据正常输入并按预期进行引用。提供的样本如下:
["last_update"]=>
int(1396917542)
["ds_cnt"]=>
int(3)
["ds_navm"]=>
array(3) {
[0]=>
string(10) "ifInOctets"
[1]=>
string(11) "ifOutOctets"
[2]=>
string(9) "sysUpTime"
}
["data"]=>
array(3) {
[0]=>
string(4) "1405"
[1]=>
string(4) "1219"
[2]=>
string(4) "1893"
}
}
基于功能:
"$debug = rrd_lastupdate (
"".$rrdFile.""
);"
我很难理解,因为输入正确,并且在编译我的代码时没有显示打印错误,为什么我没有得到任何输出?
我已经将我的工作代码作为示例,以便可能重现和更好地理解我的错误。
<?php
// rrdtool info /var/www/snmp.rrd Debugging command
while (1) {
sleep (1);
$file = "snmp";
$rrdFile = dirname(__FILE__) . "/".$file.".rrd";
$in = "ifInOctets";
$out = "ifOutOctets";
$count = "sysUpTime";
$options = array(
"--start","now -10s", // Now -10 seconds (default)
"--step", "10", // Step size of 300 seconds 5 minutes
"DS:".$in.":COUNTER:20:U:U",
"DS:".$out.":COUNTER:20:U:U",
"DS:".$count.":COUNTER:20:U:U",
/* DS:ds-name:DST:dst arguments
(DST: GAUGE, COUNTER, DERIVE, and ABSOLUTE):heartbeat:min:max
heartbeat: in case that there is not input up to 600 seconds
then the input will characterised as undefined (blank)
Based on Nyquist rate (Fs >= 2 * Fmax) 300 (step) 600 (heartbeat)
32-bit = 2^32-1 = 4294967295 (counter ticks)
64-bit = 2^64-1 = 18446744073709551615 (counter ticks)
64-bit counter (caution!!!) different oid's
*/
"RRA:MIN:0.5:10:300",
"RRA:MIN:0.5:20:600",
"RRA:MAX:0.5:10:300",
"RRA:MAX:0.5:20:600",
"RRA:AVERAGE:0.5:10:300",
"RRA:AVERAGE:0.5:20:600",
/* RRA:AVERAGE | MIN | MAX | LAST:xff:steps:rows
xff range: 0-1 (exclusive) defines the allowed number of unknown
*UNKNOWN* PDPs to the number of PDPs in the interval. Step defines
how many of those data points are used to build consolidated data.
rows defines how many data values are kept in an RRA.
*/
);
//create rrd file
$create = rrd_create(
"".$rrdFile."",
$options
);
if ($create === FALSE) {
echo "Creation error: ".rrd_error()."\n";
}
$ifInOctets = rand(0, 1500); // ifInOctets (OID: 1.3.6.1.2.1.2.2.1.10)
$ifOutOctets = rand(0, 2500); // ifOutOctets (OID: 1.3.6.1.2.1.2.2.1.16)
$sysUpTime = rand(0, 2000); // sysUpTime (OID: 1.3.6.1.2.1.1.3)
$t = time();
//update rrd file
$update = rrd_update(
"".$rrdFile."",
array(
/* Update database with 3 values
based on time now (N:timestamp) */
"".$t.":".$ifInOctets.":".$ifOutOctets.":".$sysUpTime.""
)
);
if ($update === FALSE) {
echo "Update error: ".rrd_error()."\n";
}
$start = "now";
$title = "Hourly Server Data";
$final = array(
"--start","".$start." -10s",
"--step","10",
"--title=".$title."",
"--vertical-label=Bytes/sec",
"--lower-limit=0",
//"--no-gridfit",
"--slope-mode",
//"--imgformat","EPS",
"DEF:".$in."_def=".$file.".rrd:".$in.":AVERAGE",
"DEF:".$out."_def=".$file.".rrd:".$out.":AVERAGE",
"DEF:".$count."_def=".$file.".rrd:".$count.":AVERAGE",
"CDEF:inbits=".$in."_def,8,*",
"CDEF:outbits=".$out."_def,8,*",
"CDEF:counter=".$count."_def,8,*",
/* "VDEF:".$in_min."=inbits,MINIMUM",
"VDEF:".$out_min."=outbits,MINIMUM",
"VDEF:".$in_max."=inbits,MAXIMUM",
"VDEF:".$out_max."=outbits,MAXIMUM",
"VDEF:".$in_av."=inbits,AVERAGE",
"VDEF:".$out_av."=outbits,AVERAGE", */
"COMMENT:\\n",
"LINE:".$in."_def#FF00FF:".$in."",
"GPRINT:inbits:LAST:last \: %6.2lf %SBps",
"COMMENT:\\n",
"LINE:".$out."_def#0000FF:".$out."",
"GPRINT:outbits:LAST:last \: %6.2lf %SBps",
"COMMENT:\\n",
"LINE:".$count."_def#FFFF00:".$count."",
"GPRINT:counter:LAST:last\: %6.2lf %SBps",
"COMMENT:\\n",
);
// graph output
$outputPngFile = rrd_graph(
"".$file.".png",
$final
);
if ($outputPngFile === FALSE) {
echo "<b>Graph error: </b>".rrd_error()."\n";
}
/* Returns the first data sample from the
specified RRA of the RRD file. */
$result = rrd_first (
$rrdFile,
$raaindex = 0
);
if ($result === FALSE) {
echo "<b>Graph result error: </b>".rrd_error()."\n";
}
/* Returns the UNIX timestamp of the most
recent update of the RRD database. */
$last = rrd_last (
$rrdFile
);
if ($last === FALSE) {
echo "<b>Graph result error: </b>".rrd_error()."\n";
}
$info = rrd_info (
"".$rrdFile.""
);
if ($info === FALSE) {
echo "<b>Graph result error: </b>".rrd_error()."\n";
}
/* Gets array of the UNIX timestamp and the values stored
for each date in the most recent update of the RRD database file. */
$debug = rrd_lastupdate (
"".$rrdFile.""
);
if ($debug === FALSE) {
echo "<b>Graph result error: </b>".rrd_error()."\n";
}
var_dump ($debug);
/* $version = rrd_version ( );
echo "This is the version ".$version."\n"; */
} // End of while condition
?>