function retrieve_metrics_cache()
{
global $conf, $index_array, $hosts, $grid, $clusters, $debug, $metrics, $context;
if ($conf['cachedata'] == 1 && file_exists($conf['cachefile'])) {
// check for the cached file
// snag it and return it if it is still fresh
$time_diff = time() - filemtime($conf['cachefile']);
$expires_in = $conf['cachetime'] - $time_diff;
if ($time_diff < $conf['cachetime']) {
if ($debug == 1) {
echo "DEBUG: Fetching data from cache. Expires in " . $expires_in . " seconds.\n";
}
$index_array = unserialize(file_get_contents($conf['cachefile']));
}
}
if (!isset($index_array) || sizeof($index_array) == 0) {
if ($debug == 1) {
echo "DEBUG: Querying GMond for new data\n";
}
// Set up for cluster summary
$context = "index_array";
include_once $conf['gweb_root'] . "/ganglia.php";
Gmetad($conf['ganglia_ip'], $conf['ganglia_port']);
foreach ($index_array['cluster'] as $hostname => $elements) {
$hosts[] = $hostname;
}
asort($hosts);
$index_array['hosts'] = $hosts;
file_put_contents($conf['cachefile'], serialize($index_array));
}
}
# Retrieves and parses the XML output from gmond. Results stored
# in global variables: $clusters, $hosts, $hosts_down, $metrics.
# Assumes you have already called get_context.php.
#
# If we are in compare_hosts, views and decompose_graph context we shouldn't attempt
# any connections to the gmetad
if (in_array($context, $SKIP_GMETAD_CONTEXTS)) {
} else {
if (!Gmetad($conf['ganglia_ip'], $conf['ganglia_port'])) {
print "<H4>There was an error collecting ganglia data " . "({$conf['ganglia_ip']}:{$conf['ganglia_port']}): {$error}</H4>\n";
exit;
}
# If we have no child data sources, assume something is wrong.
if (!count($grid) and !count($cluster)) {
print "<H4>Ganglia cannot find a data source. Is gmond running?</H4>";
exit;
}
# If we only have one cluster source, suppress MetaCluster output.
if (count($grid) < 2 and $context == "meta") {
# Lets look for one cluster (the other is our grid).
foreach ($grid as $source) {
if (isset($source['CLUSTER']) and $source['CLUSTER']) {
$standalone = 1;
$context = "cluster";
# Need to refresh data with new context.
Gmetad($conf['ganglia_ip'], $conf['ganglia_port']);
$clustername = $source['NAME'];
}
}
}
}
<?php
# $Id$
# Retrieves and parses the XML output from gmond. Results stored
# in global variables: $clusters, $hosts, $hosts_down, $metrics.
# Assumes you have already called get_context.php.
#
if (!Gmetad($ganglia_ip, $ganglia_port)) {
print "<H4>There was an error collecting ganglia data " . "({$ganglia_ip}:{$ganglia_port}): {$error}</H4>\n";
exit;
}
# If we have no child data sources, assume something is wrong.
if (!count($grid) and !count($cluster)) {
print "<H4>Ganglia cannot find a data source. Is gmond running?</H4>";
exit;
}
# If we only have one cluster source, suppress MetaCluster output.
if (count($grid) <= 2 and $context == "meta") {
# Lets look for one cluster (the other is our grid).
foreach ($grid as $source) {
if (isset($source['CLUSTER']) and $source['CLUSTER']) {
$standalone = 1;
$context = "cluster";
# Need to refresh data with new context.
Gmetad($ganglia_ip, $ganglia_port);
$clustername = $source['NAME'];
}
}
}
