RootForum Community

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svn export https://svn.webmasterpro.de/serverstats/trunk serverstats-dev

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mv config.sample config

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exception 'Exception' with message 'Unable to read imagefile' in /var/www/kazzam/serverstats-dev/graph.php:246
Stack trace:
#0 /var/www/kazzam/serverstats-dev/graph.php(246): unknown()
#1 {main}

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--- includes/rrd.class.php 2005-09-13 12:04:14.000000000 +0200
+++ includes/rrd.class.php      2005-09-13 12:05:19.000000000 +0200
@@ -152,6 +152,7 @@
                $output = array();
                $return = 0;
                $command = escapeshellcmd($this->rrdtoolbin) . $params;
+die($command);
                exec($command . ' 2>&1', $output, $return);
                if ($return != 0)
                {
@@ -357,6 +358,7 @@
                $output = array();
                $return = 0;
                $command = escapeshellcmd($this->rrdtoolbin) . $params;
+die($command);
                exec($command . ' 2>&1', $output, $return);
                if ($return != 0)
                {

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php update.php

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    array(
        'title' => 'Apache: Requests pro Sekunde',
        'lowerLimit' => 0,
        'altAutoscaleMax' => true,
        'content' => array(
            array(
                'type' => 'LINE',
                'source' => 'apache',
                'ds' => 'requests',
                'cf' => 'AVERAGE',
                'legend' => 'Requests/s',
                'width' => 1,
                'color' => '00A302'
            )
        )
    )#,

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addDatasource($name, $type, $p1 = null, $p2 = null, $p3 = null)

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DS:ds-name:DST:dst arguments
    A single RRD can accept input from several data sources (DS),
    for example incoming and outgoing traffic on a specific
    communication line. With the DS configuration option you must
    define some basic properties of each data source you want to
    store in the RRD.

    ds-name is the name you will use to reference this particular
    data source from an RRD. A ds-name must be 1 to 19 characters
    long in the characters [a-zA-Z0-9_].

    DST defines the Data Source Type. The remaining arguments of a
    data source entry depend on the data source type. For GAUGE,
    COUNTER, DERIVE, and ABSOLUTE the format for a data source entry 
    is:

    DS:ds-name:GAUGE | COUNTER | DERIVE | 
    ABSOLUTE:heartbeat:min:max

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GAUGE
    is for things like temperatures or number of people in a room or
    the value of a RedHat share.
COUNTER
    is for continuous incrementing counters like the ifInOctets 
    counter in a router. The COUNTER data source assumes that the
    counter never decreases, except when a counter overflows. The 
    update function takes the overflow into account. The counter is 
    stored as a per-second rate. When the counter overflows, RRDtool
    checks if the overflow happened at the 32bit or 64bit border and
    acts accordingly by adding an appropriate value to the result.
DERIVE
    will store the derivative of the line going from the last to the 
    current value of the data source. This can be useful for gauges,
    for example, to measure the rate of people entering or leaving a
    room. Internally, derive works exactly like COUNTER but without 
    overflow checks. So if your counter does not reset at 32 or 64 
    bit you might want to use DERIVE and combine it with a MIN value
    of 0.

ABSOLUTE
    is for counters which get reset upon reading. This is used for 
    fast counters which tend to overflow. So instead of reading them
    normally you reset them after every read to make sure you have a 
    maximum time available before the next overflow. Another usage 
    is for things you count like number of messages since the last
    update.

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class traffic_proc extends source
{
    private $ifs;
    private $data;

    public function __construct($ifs = array('eth0'))
    {
        if(!is_array($ifs))
        {
            throw new Exception('Parameter must be an array');
        }
        $this->ifs = $ifs;
        $this->data = array();
    }

    public function refreshData()
    {
        if (!($lines = file('/proc/net/dev')))
        {
            throw new Exception('Could not read /proc/net/dev');
        }
        foreach($lines as $line)
        {
            if(preg_match('/([wd]+):[ ]*(d+)[ ]*(d+)[ ]*d+[ ]*d+[ ]*d+[ ]*d+[ ]*d+[ ]*d+[ ]*(d+)[ ]*(d+)[ ]*d+[ ]*d+[ ]*d+[ ]*d+[ ]*d+[ ]*d+/', $line, $m))
            {
                if(in_array($m[1], $this->ifs))
                {
                    $this->data[$m[1]] = array(
                        'rbytes'   => $m[2],
                        'rpackets' => $m[3],
                        'tbytes'   => $m[4],
                        'tpackets' => $m[5]
                    );
                }
            }
        }
    }

    public function initRRD(rrd $rrd)
    {
        foreach($this->ifs as $if)
        {
            $rrd->addDatasource($if.'_rbytes', 'COUNTER', null, 0, 4294967295);
            $rrd->addDatasource($if.'_rpackets', 'COUNTER', null, 0, 4294967295);
            $rrd->addDatasource($if.'_tbytes', 'COUNTER', null, 0, 4294967295);
            $rrd->addDatasource($if.'_tpackets', 'COUNTER', null, 0, 4294967295);
        }
    }

    public function updateRRD(rrd $rrd)
    {
        foreach($this->ifs as $if)
        {
            if(isset($this->data[$if]))
            {
                $rrd->setValue($if.'_rbytes', $this->data[$if]['rbytes']);
                $rrd->setValue($if.'_rpackets', $this->data[$if]['rpackets']);
                $rrd->setValue($if.'_tbytes', $this->data[$if]['tbytes']);
                $rrd->setValue($if.'_tpackets', $this->data[$if]['tpackets']);
            }
        }
    }
}

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...
    array(
        'title' => 'Traffic (eth0)',
        'lowerLimit' => 0,
        'altAutoscaleMax' => true,
        'content' => array(
            array(
                'type' => 'LINE',
                'source' => 'traffic_proc',
                'ds' => 'eth0_rbytes',
                'cf' => 'AVERAGE',
                'legend' => 'Download Bytes/s',
                'width' => 1,
                'color' => '0002A3'
            ),
            array(
                'type' => 'LINE',
                'source' => 'traffic_proc',
                'ds' => 'eth0_tbytes',
                'cf' => 'AVERAGE',
                'legend' => 'Upload Bytes/s',
                'width' => 1,
                'color' => '00A302'
            )
        )
    )
...