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<?php
# collectd related functions
require_once 'conf/common.inc.php';
# returns an array of all collectd hosts
function collectd_hosts() {
global $CONFIG;
if (!is_dir($CONFIG['datadir']))
return false;
$dir = scandir($CONFIG['datadir']);
foreach($dir as $k => $v) {
if(!is_dir($CONFIG['datadir'].'/'.$v) || $v == '.' || $v == '..')
unset($dir[$k]);
}
return($dir);
}
# returns an array of plugins/pinstances/types/tinstances
function collectd_plugindata($host) {
global $CONFIG;
if (!is_dir($CONFIG['datadir'].'/'.$host))
return false;
chdir($CONFIG['datadir'].'/'.$host);
$files = glob("*/*.rrd");
if (!$files)
return false;
$data = array();
foreach($files as $item) {
preg_match('#([\w_]+)(?:\-(.+))?/([\w_]+)(?:\-(.+))?\.rrd#', $item, $matches);
$data[] = array(
'p' => $matches[1],
'pi' => isset($matches[2]) ? $matches[2] : '',
't' => $matches[3],
'ti' => isset($matches[4]) ? $matches[4] : '',
);
}
return($data);
}
# returns an array of all plugins of a host
function collectd_plugins($host) {
$plugindata = collectd_plugindata($host);
$plugins = array();
foreach ($plugindata as $item) {
if (!in_array($item['p'], $plugins))
$plugins[] = $item['p'];
}
return $plugins;
}
# returns an array of all pi/t/ti of an plugin
function collectd_plugindetail($host, $plugin, $detail, $where=NULL) {
$details = array('pi', 't', 'ti');
if (!in_array($detail, $details))
return false;
$plugindata = collectd_plugindata($host);
$return = array();
foreach ($plugindata as $item) {
if ($item['p'] == $plugin && !in_array($item[$detail], $return) && isset($item[$detail])) {
if ($where) {
$add = true;
# add detail to returnvalue if all where is true
foreach($where as $key => $value) {
if ($item[$key] != $value)
$add = false;
}
if ($add)
$return[] = $item[$detail];
} else {
$return[] = $item[$detail];
}
}
}
if (empty($return))
return false;
return $return;
}
# generate graph url's for a plugin of a host
function graphs_from_plugin($host, $plugin) {
global $CONFIG;
$pis = collectd_plugindetail($host, $plugin, 'pi');
$ts = collectd_plugindetail($host, $plugin, 't');
$tis = collectd_plugindetail($host, $plugin, 'ti');
if (!$pis) $pis = array('NULL');
if (!$tis) $tis = array('NULL');
# backwards compatibility
if ($CONFIG['version'] >= 5 || !preg_match('/^(df|interface)$/', $plugin))
$tis = array('NULL');
foreach($pis as $pi) {
foreach ($tis as $ti) {
foreach ($ts as $t) {
$items = array(
'h' => $host,
'p' => $plugin,
'pi' => $pi,
't' => $t,
'ti' => $ti
);
$time = array_key_exists($plugin, $CONFIG['time_range'])
? $CONFIG['time_range'][$plugin]
: $CONFIG['time_range']['default'];
printf('<a href="%s/%s"><img src="%s/%s"></a>'."\n",
$CONFIG['weburl'],
build_url('detail.php', $items, $time),
$CONFIG['weburl'],
build_url('graph.php', $items, $time)
);
}
}
}
}
# generate an url with GET values from $items
function build_url($base, $items, $s=NULL) {
global $CONFIG;
if (!is_array($items))
return false;
if (!is_numeric($s))
$s = $CONFIG['time_range']['default'];
$i=0;
foreach ($items as $key => $value) {
# don't include empty values
if ($value == 'NULL')
continue;
$base .= sprintf('%s%s=%s', $i==0 ? '?' : '&', $key, $value);
$i++;
}
if (!isset($items['s']))
$base .= '&s='.$s;
return $base;
}
# generate identifier that collectd's FLUSH command understands
function collectd_identifier($host, $plugin, $pinst, $type, $tinst) {
global $CONFIG;
$identifier = sprintf('%s/%s%s%s/%s%s%s', $host,
$plugin, strlen($pinst) ? '-' : '', $pinst,
$type, strlen($tinst) ? '-' : '', $tinst);
if (is_file($CONFIG['datadir'].'/'.$identifier.'.rrd'))
return $identifier;
else
return FALSE;
}
# tell collectd to FLUSH all data of the identifier(s)
function collectd_flush($identifier) {
global $CONFIG;
if (!$CONFIG['socket'])
return FALSE;
if (!$identifier || (is_array($identifier) && count($identifier) == 0) ||
!(is_string($identifier) || is_array($identifier)))
return FALSE;
$u_errno = 0;
$u_errmsg = '';
if ($socket = @fsockopen($CONFIG['socket'], 0, $u_errno, $u_errmsg)) {
$cmd = 'FLUSH plugin=rrdtool';
if (is_array($identifier)) {
foreach ($identifier as $val)
$cmd .= sprintf(' identifier="%s"', $val);
} else
$cmd .= sprintf(' identifier="%s"', $identifier);
$cmd .= "\n";
$r = fwrite($socket, $cmd, strlen($cmd));
if ($r === false || $r != strlen($cmd)) {
printf('ERROR: Failed to write full command to unix-socket: %d out of %d written',
$r === false ? -1 : $r, strlen($cmd));
return FALSE;
}
$resp = fgets($socket);
if ($resp === false) {
printf('ERROR: Failed to read response from collectd for command: %s',
trim($cmd));
return FALSE;
}
$n = (int)$resp;
while ($n-- > 0)
fgets($socket);
fclose($socket);
return TRUE;
} else {
printf('ERROR: Failed to open unix-socket to collectd: %d: %s',
$u_errno, $u_errmsg);
return FALSE;
}
}
?>
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