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439 lines (354 loc) · 12.5 KB
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<?php
#
# Parses ganglia XML tree.
#
# The arrays defined in the first part of this file to hold XML info.
#
# sacerdoti: These are now context-sensitive, and hold only as much
# information as we need to make the page.
#
$gweb_root = dirname(__FILE__);
include_once($gweb_root . "/version.php");
include_once("./global.php");
$error="";
# Gives time in seconds to retrieve and parse XML tree. With subtree-
# capable gmetad, should be very fast in all but the largest cluster configurations.
$parsetime = 0;
# 2key = "Source Name" / "NAME | AUTHORITY | HOSTS_UP ..." = Value.
$grid = array();
# 1Key = "NAME | LOCALTIME | HOSTS_UP | HOSTS_DOWN" = Value.
$cluster = array();
# 2Key = "Cluster Name / Host Name" ... Value = Array of Host Attributes
$hosts_up = array();
# 2Key = "Cluster Name / Host Name" ... Value = Array of Host Attributes
$hosts_down = array();
# Context dependant structure.
$metrics = array();
# 1Key = "Component" (gmetad | gmond) = Version string
$version = array();
# The web frontend version, from conf.php.
$version["webfrontend"] = $GLOBALS["ganglia_version"];
# Get rrdtool version
$rrdtool_version = array();
exec($conf['rrdtool'], $rrdtool_version);
$rrdtool_version = explode(" ", $rrdtool_version[0]);
$rrdtool_version = $rrdtool_version[1];
$version["rrdtool"] = "$rrdtool_version";
# The name of our local grid.
$self = " ";
$index_array = array();
# Returns true if the host is alive. Works for both old and new gmond sources.
function host_alive($host, $cluster) {
$TTL = 60;
if ($host['TN'] and $host['TMAX']) {
if ($host['TN'] > $host['TMAX'] * 4)
return FALSE;
$host_up = FALSE;
}
else { # The old method.
if (abs($cluster["LOCALTIME"] - $host['REPORTED']) > (4*$TTL))
return FALSE;
}
return TRUE;
}
# Called with <GANGLIA_XML> attributes.
function preamble($ganglia) {
global $version;
$component = $ganglia['SOURCE'];
$version[$component] = $ganglia['VERSION'];
}
function start_meta ($parser, $tagname, $attrs) {
global $metrics, $grid, $self, $debug;
static $sourcename, $metricname;
$parser; // PHPCS
if ($debug) print "<br/>DEBUG: parser start meta [$tagname]\n";
switch ($tagname)
{
case "GANGLIA_XML":
preamble($attrs);
break;
case "GRID":
case "CLUSTER":
if ($debug) print "<br/>DEBUG: parser start meta GRID|CLUSTER\n";
# Our grid will be first.
if (!$sourcename) $self = $attrs['NAME'];
$sourcename = $attrs['NAME'];
$grid[$sourcename] = $attrs;
# Identify a grid from a cluster.
$grid[$sourcename][$tagname] = 1;
break;
case "METRICS":
$metricname = rawurlencode($attrs['NAME']);
$metrics[$sourcename][$metricname] = $attrs;
break;
case "HOSTS":
$grid[$sourcename]['HOSTS_UP'] = $attrs['UP'];
$grid[$sourcename]['HOSTS_DOWN'] = $attrs['DOWN'];
break;
default:
break;
}
}
function start_cluster ($parser, $tagname, $attrs) {
global $metrics, $cluster, $self, $grid, $hosts_up, $hosts_down, $debug;
static $hostname;
$parser; // PHPCS
if ($debug) print "<br/>DEBUG: parser start cluster [$tagname]\n";
switch ($tagname)
{
case "GANGLIA_XML":
preamble($attrs);
break;
case "GRID":
$self = $attrs['NAME'];
$grid = $attrs;
break;
case "CLUSTER":
$cluster = $attrs;
break;
case "HOST":
$hostname = $attrs['NAME'];
if (host_alive($attrs, $cluster))
{
isset($cluster['HOSTS_UP']) or $cluster['HOSTS_UP'] = 0;
$cluster['HOSTS_UP']++;
$hosts_up[$hostname] = $attrs;
}
else
{
isset($cluster['HOSTS_DOWN']) or $cluster['HOSTS_DOWN'] = 0;
$cluster['HOSTS_DOWN']++;
$hosts_down[$hostname] = $attrs;
}
# Pseudo metrics - add useful HOST attributes like gmond_started & last_reported to the metrics list:
$metrics[$hostname]['gmond_started']['NAME'] = "GMOND_STARTED";
$metrics[$hostname]['gmond_started']['VAL'] = $attrs['GMOND_STARTED'];
$metrics[$hostname]['gmond_started']['TYPE'] = "timestamp";
$metrics[$hostname]['last_reported']['NAME'] = "REPORTED";
$metrics[$hostname]['last_reported']['VAL'] = uptime($cluster['LOCALTIME'] - $attrs['REPORTED']);
$metrics[$hostname]['last_reported']['TYPE'] = "string";
$metrics[$hostname]['last_reported_uptime_in_sec']['VAL'] = $cluster['LOCALTIME'] - $attrs['REPORTED'];
$metrics[$hostname]['last_reported_timestamp']['NAME'] = "REPORTED TIMESTAMP";
$metrics[$hostname]['last_reported_timestamp']['VAL'] = $attrs['REPORTED'];
$metrics[$hostname]['last_reported_timestamp']['TYPE'] = "uint32";
$metrics[$hostname]['ip_address']['NAME'] = "IP";
$metrics[$hostname]['ip_address']['VAL'] = $attrs['IP'];
$metrics[$hostname]['ip_address']['TYPE'] = "string";
$metrics[$hostname]['location']['NAME'] = "LOCATION";
$metrics[$hostname]['location']['VAL'] = $attrs['LOCATION'];
$metrics[$hostname]['location']['TYPE'] = "string";
break;
case "METRIC":
$metricname = rawurlencode($attrs['NAME']);
$metrics[$hostname][$metricname] = $attrs;
break;
default:
break;
}
}
function start_everything ($parser, $tagname, $attrs) {
global $index_array, $hosts, $metrics, $cluster, $self, $grid, $hosts_up, $hosts_down, $debug;
static $hostname, $cluster_name;
$parser; // PHPCS
if ($debug) print "<br/>DEBUG: parser start everything [$tagname]\n";
switch ($tagname)
{
case "GANGLIA_XML":
preamble($attrs);
break;
case "GRID":
$self = $attrs['NAME'];
$grid = $attrs;
break;
case "CLUSTER":
# $cluster = $attrs;
$cluster_name = $attrs['NAME'];
break;
case "HOST":
$hostname = $attrs['NAME'];
# For some reason this occasionally will end up marking live hosts not alive
# causing them to miss out from aggregate graphs
# if (host_alive($attrs, $cluster_name))
$index_array['cluster'][$hostname][] = $cluster_name;
case "METRIC":
$metricname = rawurlencode($attrs['NAME']);
if ( $metricname != $hostname )
$index_array['metrics'][$metricname][] = $hostname;
break;
default:
break;
}
}
function start_cluster_summary ($parser, $tagname, $attrs) {
global $metrics, $cluster, $self, $grid;
$parser; // PHPCS
switch ($tagname)
{
case "GANGLIA_XML":
preamble($attrs);
break;
case "GRID":
$self = $attrs['NAME'];
$grid = $attrs;
case "CLUSTER":
$cluster = $attrs;
break;
case "HOSTS":
$cluster['HOSTS_UP'] = $attrs['UP'];
$cluster['HOSTS_DOWN'] = $attrs['DOWN'];
break;
case "METRICS":
$metrics[$attrs['NAME']] = $attrs;
break;
default:
break;
}
}
function start_host ($parser, $tagname, $attrs) {
global $metrics, $cluster, $hosts_up, $hosts_down, $self, $grid;
static $metricname;
$parser; // PHPCS
switch ($tagname)
{
case "GANGLIA_XML":
preamble($attrs);
break;
case "GRID":
$self = $attrs['NAME'];
$grid = $attrs;
break;
case "CLUSTER":
$cluster = $attrs;
break;
case "HOST":
if (host_alive($attrs, $cluster))
$hosts_up = $attrs;
else
$hosts_down = $attrs;
break;
case "METRIC":
$metricname = rawurlencode($attrs['NAME']);
$metrics[$metricname] = $attrs;
break;
case "EXTRA_DATA":
break;
case "EXTRA_ELEMENT":
if ( isset($attrs['NAME']) && isset($attrs['VAL']) && ($attrs['NAME'] == "GROUP")) {
if ( isset($metrics[$metricname]['GROUP']) ) {
$group_array = array_merge( (array)$attrs['VAL'], $metrics[$metricname]['GROUP'] );
} else {
$group_array = (array)$attrs['VAL'];
}
$attribarray = array($attrs['NAME'] => $attrs['VAL']);
$metrics[$metricname] = array_merge($metrics[$metricname], $attribarray);
$metrics[$metricname]['GROUP'] = $group_array;
} else {
$attribarray = array($attrs['NAME'] => $attrs['VAL']);
$metrics[$metricname] = array_merge($metrics[$metricname], $attribarray);
}
break;
default:
break;
}
}
function end_all ($parser, $tagname) {
}
function Gmetad () {
global $conf, $error, $parsetime, $clustername, $hostname, $context, $debug;
if ($debug) print "<br/>\n";
# Parameters are optionalshow
# Defaults...
$ip = $conf['ganglia_ip'];
$port = $conf['ganglia_port'];
$timeout = 3.0;
$errstr = "";
$errno = "";
//TODO: all calls to this function (in get_ganglia.php) supply 2 args. Why do we make that optional?
switch( func_num_args() )
{
case 2:
$port = func_get_arg(1);
case 1:
$ip = func_get_arg(0);
}
if ($debug) print "<br/>DEBUG: Creating parser\n";
if ( isset($context) && is_array($context) && isset($SKIP_GMETAD_CONTEXTS) && is_array($SKIP_GMETAD_CONTEXTS) && in_array($context, $SKIP_GMETAD_CONTEXTS) ) {
return TRUE;
}
$parser = xml_parser_create();
$strip_extra = $conf['strip_extra'];
switch ($context)
{
case "meta":
case "control":
case "tree":
default:
xml_set_element_handler($parser, "start_meta", "end_all");
$request = "/?filter=summary";
break;
case "physical":
case "cluster":
xml_set_element_handler($parser, "start_cluster", "end_all");
$request = "/$clustername";
break;
case "index_array":
case "views":
xml_set_element_handler($parser, "start_everything", "end_all");
$request = "/";
break;
case "cluster-summary":
xml_set_element_handler($parser, "start_cluster_summary", "end_all");
$request = "/$clustername?filter=summary";
break;
case "node":
case "host":
xml_set_element_handler($parser, "start_host", "end_all");
$request = "/$clustername/$hostname";
$strip_extra = false;
break;
}
$fp = fsockopen( $ip, $port, $errno, $errstr, $timeout);
if (!$fp)
{
$error = "fsockopen error: $errstr";
if ($debug) print "<br/>DEBUG: $error\n";
return FALSE;
}
if ($port == 8649)
{
# We are connecting to a gmond. Non-interactive.
xml_set_element_handler($parser, "start_cluster", "end_all");
}
else
{
$request .= "\n";
$rc = fputs($fp, $request);
if (!$rc)
{
$error = "Could not sent request to gmetad: $errstr";
if ($debug) print "<br/>DEBUG: $error\n";
return FALSE;
}
}
$start = gettimeofday();
while(!feof($fp))
{
$data = fread($fp, 16384);
if($strip_extra) $data = preg_replace('/<EXTRA_DATA>.*?<\/EXTRA_DATA>/s', '', $data);
if (!xml_parse($parser, $data, feof($fp)))
{
$error = sprintf("XML error: %s at %d",
xml_error_string(xml_get_error_code($parser)),
xml_get_current_line_number($parser));
if ($debug) print "<br/>DEBUG: $error\n";
fclose($fp);
return FALSE;
}
}
fclose($fp);
$end = gettimeofday();
$parsetime = ($end['sec'] + $end['usec']/1e6) - ($start['sec'] + $start['usec']/1e6);
if ($debug) print "<br/>DEBUG: theoretically completed gmetad parsing\n";
return TRUE;
}
?>