a1b27d099b
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@10360 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
830 lines
25 KiB
JavaScript
830 lines
25 KiB
JavaScript
/**
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* Global variables
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*/
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//save grid summary data, update every one minute
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var gridData;
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//save nodes path, used for getting detail from rrd file
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var nodePath = new Object();
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//save nodes current status,
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//unknown-> -2, error->-1, warning->0 ,normal->1 which is used for sorting
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var nodeStatus = new Object();
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//update timer
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var gangliaTimer;
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/**
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* Load Ganglia monitoring tool
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*
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* @return Nothing
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*/
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function loadGangliaMon() {
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// Get Ganglia tab
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$('#gangliamon').append(createInfoBar('Checking RPMs.'));
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//should get the groups first
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if (!$.cookie('groups')){
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$.ajax( {
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url : 'lib/cmd.php',
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dataType : 'json',
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data : {
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cmd : 'extnoderange',
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tgt : '/.*',
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args : 'subgroups',
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msg : ''
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},
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success : setGroupsCookies
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});
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}
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// Check whether Ganglia RPMs are installed on the xCAT MN
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$.ajax({
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url : 'lib/systemcmd.php',
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dataType : 'json',
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data : {
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cmd : 'rpm -q rrdtool ganglia-gmetad ganglia-gmond'
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},
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success : checkGangliaRPMs
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});
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return;
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}
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/**
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* Check whether Ganglia RPMs are installed
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*
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* @param data
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* Data returned from HTTP request
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* @return Nothing
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*/
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function checkGangliaRPMs(data) {
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var gangliaTab = $('#gangliamon');
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gangliaTab.empty();
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// Get the list of Ganglia RPMs installed
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var status = data.rsp.split(/\n/);
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var gangliaRPMs = [ "rrdtool", "ganglia-gmetad", "ganglia-gmond"];
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var warningMsg = 'Before continuing, please install the following packages: ';
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var missingRPMs = false;
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for ( var i in status) {
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if (status[i].indexOf("not installed") > -1) {
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warningMsg += gangliaRPMs[i] + ' ';
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missingRPMs = true;
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}
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}
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// Append Ganglia PDF
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if (missingRPMs) {
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warningMsg += ". Refer to <a href='http://xcat.svn.sourceforge.net/viewvc/xcat/xcat-core/trunk/xCAT-client/share/doc/xCAT2-Monitoring.pdf'>xCAT2-Monitoring.pdf</a> for more information.";
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var warningBar = createWarnBar(warningMsg);
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warningBar.css('margin-bottom', '10px');
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warningBar.prependTo(gangliaTab);
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} else {
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gangliaTab.append(createInfoBar('Checking Running status.'));
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// Check if ganglia is running on the xCAT MN
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$.ajax( {
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url : 'lib/cmd.php',
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dataType : 'json',
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data : {
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cmd : 'monls',
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tgt : '',
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args : 'gangliamon',
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msg : ''
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},
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success : checkGangliaRunning
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});
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}
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return;
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}
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/**
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* Check whether Ganglia is running
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*
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* @param data
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* Data returned from HTTP request
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* @return Nothing
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*/
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function checkGangliaRunning(data){
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var gangliaTab = $('#gangliamon');
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var groupsSelectStr = '';
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var groupsArray = $.cookie('groups').split(',');
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gangliaTab.empty();
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if (data.rsp[0].indexOf("not-monitored") > -1) {
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// Create link to start Ganglia
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var startLnk = $('<a href="#">Click here</a>');
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startLnk.css( {
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'color' : 'blue',
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'text-decoration' : 'none'
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});
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startLnk.click(function() {
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// Turn on Ganglia for all nodes
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monitorNode('', 'on');
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});
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// Create warning bar
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var warningBar = $('<div class="ui-state-error ui-corner-all"></div>');
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var msg = $('<p></p>').css({
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'display': 'inline-block',
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'width': '90%'
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});
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var icon = $('<span class="ui-icon ui-icon-alert"></span>').css({
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'display': 'inline-block',
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'margin': '10px 5px'
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});
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warningBar.append(icon);
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msg.append('Please start Ganglia on xCAT. ');
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msg.append(startLnk);
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msg.append(' to start Ganglia.');
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warningBar.append(msg);
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warningBar.css('margin-bottom', '10px');
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// If there are any warning messages, append this warning after it
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var curWarnings = $('#gangliamon').find('.ui-state-error');
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if (curWarnings.length) {
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curWarnings.after(warningBar);
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} else {
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warningBar.prependTo(gangliaTab);
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}
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return;
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}
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groupsSelectStr = '<select style="padding:0px;" id="gangliagroup">';
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for (var i in groupsArray){
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groupsSelectStr += '<option value="' + groupsArray[i] + '">' + groupsArray[i] + '</option>';
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}
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groupsSelectStr += '</select>';
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//help info
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var helpStr = '<table style="float:right"><tr>' +
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'<td style="background:#66CD00;width:16px;padding:0px;"> </td><td style="padding:0px;border:0px">Normal</td>' +
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'<td style="background:#FFD700;width:16px;padding:0px;"> </td><td style="padding:0px;">Heavy Load</td>' +
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'<td style="background:#FF3030;width:16px;padding:0px;"> </td><td style="padding:0px;">Error</td>' +
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'<td style="background:#8B8B7A;width:16px;padding:0px;"> </td><td style="padding:0px;">Unknown</td>' +
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'</tr></table>';
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//pass checking
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var showStr = '<div><h3 style="display:inline;">Grid Overview</h3>' +
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'<sup id="hidesup" style="cursor: pointer;color:blue;float:right">[Hide]</sup></div><hr>' +
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'<div id="gangliaGridSummary"></div>' +
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'<div><h3 style="display:inline;">Nodes Current Status</h3>' + helpStr + '</div>' +
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'<hr>Nodes in Group:' + groupsSelectStr +
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' order by: <select id="gangliaorder" style="padding:0px;"><option value="name">Name</option>' +
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'<option value="asc">Ascending</option><option value="des">Descending</option></select>' +
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'<div id="gangliaNodes"></div>';
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//ganglia help information
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gangliaTab.append(showStr);
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//get summary data and draw on the page
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$('#gangliaGridSummary').append('Getting Grid summary Data.<img src="images/loader.gif"></img>');
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sendGridSummaryAjax();
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//get nodes current status and draw on the page
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$('#gangliaNodes').append('Getting ' + $('#gangliagroup').val() + ' nodes Status.<img src="images/loader.gif"></img>');
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sendNodeCurrentAjax();
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//start the timer to update page per minute.
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gangliaTimer = window.setTimeout('updateGangliaPage()', 60000);
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//bind the group select change event
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$('#gangliagroup').bind('change', function(){
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var groupname = $(this).val();
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$('#gangliaNodes').html('Getting ' + groupname + ' nodes Status.<img src="images/loader.gif"></img>');
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sendNodeCurrentAjax();
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});
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//bind the order select change event
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$('#gangliaorder').bind('change', function(){
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drawGangliaNodesArea($(this).val());
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});
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//bind the hide/show buttion event
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$('#gangliamon #hidesup').bind('click', function(){
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var a = $(this).text();
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if ('[Hide]' == $(this).text()){
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$(this).html('[Show]');
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}
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else{
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$(this).html('[Hide]');
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}
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$('#gangliaGridSummary').toggle();
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});
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}
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/**
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* send ajax request to get grid summary information
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*
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* @param
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*
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* @return Nothing
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*/
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function sendGridSummaryAjax(){
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//get the summary data
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$.ajax({
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url : 'lib/cmd.php',
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dataType : 'json',
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data : {
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cmd : 'webrun',
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tgt : '',
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args : 'gangliashow;_grid_;hour;_summary_',
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msg : ''
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},
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success: function(data){
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createGridSummaryData(data.rsp[0]);
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drawGridSummary();
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}
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});
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}
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/**
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* send ajax request to get nodes current load information
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*
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* @param which group name want to get
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*
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* @return Nothing
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*/
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function sendNodeCurrentAjax(){
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var groupname = $('#gangliagroup').val();
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//get all nodes current status
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$.ajax({
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url : 'lib/cmd.php',
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dataType : 'json',
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data : {
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cmd : 'webrun',
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tgt : '',
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args : 'gangliacurrent;node;' + groupname,
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msg : ''
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},
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success: function(data){
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createNodeStatusData(data.rsp[0]);
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drawGangliaNodesArea($('#gangliaorder').val());
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}
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});
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}
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/**
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* send ajax request to get grid current summary information for update the page
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*
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* @param
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*
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* @return Nothing
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*/
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function sendGridCurrentAjax(){
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//get the summary data
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$.ajax({
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url : 'lib/cmd.php',
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dataType : 'json',
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data : {
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cmd : 'webrun',
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tgt : '',
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args : 'gangliacurrent;grid',
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msg : ''
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},
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success: function(data){
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updateGridSummaryData(data.rsp[0]);
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drawGridSummary();
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}
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});
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}
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/**
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* save the grid summary data to local global variable
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*
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* @param data structure
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* metric1:time11,val11,time12,val12....;metric2:time21,val21,time22,val22,...;....
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* @return Nothing
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*/
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function createGridSummaryData(summaryString){
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//empty the global data
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gridData = new Object();
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var metricArray = summaryString.split(';');
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var metricname = '';
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var valueArray = '';
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var position = 0;
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var tempLength = 0;
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for (var index = 0; index < metricArray.length; index++){
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position = metricArray[index].indexOf(':');
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//get the metric name and init its global array to save timestamp and value pair
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metricname = metricArray[index].substr(0, position);
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gridData[metricname] = new Array();
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valueArray = metricArray[index].substr(position + 1).split(',');
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tempLength = valueArray.length;
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//save timestamp and value into global array
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for (var i = 0; i < tempLength; i++){
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gridData[metricname].push(Number(valueArray[i]));
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}
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}
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}
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/**
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* update the grid summary data to local global variable
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*
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* @param data structure
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* metric1:time11,val11;metric2:time21,val21,time22;....
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* @return Nothing
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*/
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function updateGridSummaryData(currentString){
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var metricArray = currentString.split(';');
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var metricname = '';
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var position = 0;
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var tempLength = 0;
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var index = 0;
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var tempArray;
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tempLength = metricArray.length;
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for (index = 0; index < tempLength; index++){
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position = metricArray[index].indexOf(':');
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metricname = metricArray[index].substr(0, position);
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tempArray = metricArray[index].substr(position + 1).split(',');
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if (gridData[metricname]){
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gridData[metricname].shift();
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gridData[metricname].shift();
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gridData[metricname].push(Number(tempArray[0]));
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gridData[metricname].push(Number(tempArray[1]));
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}
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}
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}
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/**
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* draw the Grid summay area by global data
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*
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* @param data
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* Data returned from HTTP request
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* @return Nothing
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*/
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function drawGridSummary() {
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var gridDrawArea = $('#gangliaGridSummary');
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var showStr = '';
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var tempStr = $('#gangliamon').attr('class');
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//jqflot only draw on the area visiable, if the tab is hide, return directly
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if (-1 != tempStr.indexOf('hide')){
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return;
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};
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if ('[Show]' == $('#gangliamon #hidesup').text()){
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return;
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}
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gridDrawArea.empty();
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showStr = '<table style="border-style:none;"><tr><td style="padding:0;border-style:none;"><div id="gangliasummaryload" class="monitorsumdiv"></div></td>' +
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'<td style="padding:0;border-style:none;"><div id="gangliasummarycpu" class="monitorsumdiv"></div></td>' +
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'<td style="padding:0;border-style:none;"><div id="gangliasummarymem" class="monitorsumdiv"></div></td></tr>' +
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'<tr><td style="padding:0;border-style:none;"><div id="gangliasummarydisk" class="monitorsumdiv"></div></td>' +
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'<td style="padding:0;border-style:none;"><div id="gangliasummarynetwork" class="monitorsumdiv"></div></td>' +
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'<td style="padding:0;border-style:none;"></td></tr></table>';
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gridDrawArea.append(showStr);
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drawLoadFlot('gangliasummaryload', 'Grid', gridData['load_one'], gridData['cpu_num']);
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drawCpuFlot('gangliasummarycpu', 'Grid', gridData['cpu_idle']);
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drawMemFlot('gangliasummarymem', 'Grid', gridData['mem_free'], gridData['mem_total']);
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drawDiskFlot('gangliasummarydisk', 'Grid', gridData['disk_free'], gridData['disk_total']);
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drawNetworkFlot('gangliasummarynetwork', 'Grid', gridData['bytes_in'], gridData['bytes_out']);
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}
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/**
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* draw the load flot by data(maybe summary data, or one node's data)
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*
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* @param areaid: which div draw this flot
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* loadpair: the load timestamp and value pair
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* cpupair: the cpu number and value pair
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*
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* @return Nothing
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*/
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function drawLoadFlot(areaid, titleprefix, loadpair, cpupair){
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var load = new Array();
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var cpunum = new Array();
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var index = 0;
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var templength = 0;
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var yaxismax = 0;
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var interval = 1;
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$('#' + areaid).empty();
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//parse load pair, the timestamp must mutiply 1000, javascript time stamp is millisecond
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templength = loadpair.length;
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for (index = 0; index < templength; index += 2){
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load.push([loadpair[index] * 1000, loadpair[index + 1]]);
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if (loadpair[index + 1] > yaxismax){
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yaxismax = loadpair[index + 1];
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}
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}
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//parse cpu pair
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templength = cpupair.length;
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for (index = 0; index < templength; index += 2){
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cpunum.push([cpupair[index] * 1000, cpupair[index + 1]]);
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if (cpupair[index + 1] > yaxismax){
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yaxismax = cpupair[index + 1];
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}
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}
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interval = parseInt(yaxismax / 3);
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if (interval < 1){
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interval = 1;
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}
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$.jqplot(areaid, [load, cpunum],{
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title: titleprefix + ' Loads/Procs Last Hour',
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axes:{
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xaxis:{
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renderer : $.jqplot.DateAxisRenderer,
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numberTicks: 4,
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tickOptions : {
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formatString : '%R',
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show : true
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}
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},
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yaxis: {
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min : 0,
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tickInterval : interval
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}
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},
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legend : {
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show: true,
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location: 'nw'
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},
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series:[{label:'Load'}, {label: 'CPU Number'}],
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seriesDefaults : {showMarker: false}
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}
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);
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}
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/**
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* draw the cpu usage flot by data(maybe summary data, or one node's data)
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*
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* @param areaid: which div draw this flot
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* titleprefix : title used name
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* cpupair: the cpu timestamp and value pair
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*
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* @return Nothing
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*/
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function drawCpuFlot(areaid, titleprefix, cpupair){
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var cpu = new Array();
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var index = 0;
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var tempLength = 0;
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$('#' + areaid).empty();
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tempLength = cpupair.length;
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// time stamp should mutiply 1000
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// we get the cpu idle from server, we should use 1 subtract the idle.
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for(index = 0; index < tempLength; index +=2){
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cpu.push([(cpupair[index] * 1000), (100 - cpupair[index + 1])]);
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}
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$.jqplot(areaid, [cpu],{
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title: titleprefix + ' Cpu Use Last Hour',
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axes:{
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xaxis:{
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renderer : $.jqplot.DateAxisRenderer,
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numberTicks: 4,
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tickOptions : {
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formatString : '%R',
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show : true
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}
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},
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yaxis: {
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min : 0,
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max : 100,
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tickOptions:{formatString : '%d\%'}
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}
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},
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seriesDefaults : {showMarker: false}
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}
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);
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}
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/**
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* draw the memory usage flot by data(maybe summary data, or one node's data)
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*
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* @param areaid: which div draw this flot
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* titleprefix : title used name
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* cpupair: the cpu timestamp and value pair
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*
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* @return Nothing
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*/
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function drawMemFlot(areaid, titleprefix, freepair, totalpair){
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var use = new Array();
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var total = new Array();
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var tempsize = 0;
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var index = 0;
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$('#' + areaid).empty();
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if(freepair.length < totalpair.length){
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tempsize = freepair.length;
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}
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else{
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tempsize = freepair.length;
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}
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for(index = 0; index < tempsize; index += 2){
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var temptotal = totalpair[index + 1];
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var tempuse = temptotal - freepair[index + 1];
|
|
temptotal = temptotal / 1000000;
|
|
tempuse = tempuse / 1000000;
|
|
total.push([totalpair[index] * 1000, temptotal]);
|
|
use.push([freepair[index] * 1000, tempuse]);
|
|
}
|
|
|
|
$.jqplot(areaid, [use, total],{
|
|
title: titleprefix + ' Memory Use Last Hour',
|
|
axes:{
|
|
xaxis:{
|
|
renderer : $.jqplot.DateAxisRenderer,
|
|
numberTicks: 4,
|
|
tickOptions : {
|
|
formatString : '%R',
|
|
show : true
|
|
}
|
|
},
|
|
yaxis: {
|
|
min : 0,
|
|
tickOptions:{formatString : '%.2fG'}
|
|
}
|
|
},
|
|
legend : {
|
|
show: true,
|
|
location: 'nw'
|
|
},
|
|
series:[{label:'Used'}, {label: 'Total'}],
|
|
seriesDefaults : {showMarker: false}
|
|
}
|
|
);
|
|
}
|
|
|
|
/**
|
|
* draw the disk usage flot by data(maybe summary data, or one node's data)
|
|
*
|
|
* @param areaid: which div draw this flot
|
|
* titleprefix : title used name
|
|
* freepair: the free disk number, ganglia only log the free data
|
|
* totalpair: the all disk number
|
|
*
|
|
* @return Nothing
|
|
*/
|
|
function drawDiskFlot(areaid, titleprefix, freepair, totalpair){
|
|
var use = new Array();
|
|
var total = new Array();
|
|
var tempsize = 0;
|
|
var index = 0;
|
|
|
|
$('#' + areaid).empty();
|
|
if(freepair.length < totalpair.length){
|
|
tempsize = freepair.length;
|
|
}
|
|
else{
|
|
tempsize = freepair.length;
|
|
}
|
|
|
|
for(index = 0; index < tempsize; index += 2){
|
|
var temptotal = totalpair[index + 1];
|
|
var tempuse = temptotal - freepair[index + 1];
|
|
total.push([totalpair[index] * 1000, temptotal]);
|
|
use.push([freepair[index] * 1000, tempuse]);
|
|
}
|
|
|
|
$.jqplot(areaid, [use, total],{
|
|
title: titleprefix + ' Disk Use Last Hour',
|
|
axes:{
|
|
xaxis:{
|
|
renderer : $.jqplot.DateAxisRenderer,
|
|
numberTicks: 4,
|
|
tickOptions : {
|
|
formatString : '%R',
|
|
show : true
|
|
}
|
|
},
|
|
yaxis: {
|
|
min : 0,
|
|
tickOptions:{formatString : '%.2fG'}
|
|
}
|
|
},
|
|
legend : {
|
|
show: true,
|
|
location: 'nw'
|
|
},
|
|
series:[{label:'Used'}, {label: 'Total'}],
|
|
seriesDefaults : {showMarker: false}
|
|
}
|
|
);
|
|
}
|
|
|
|
function drawNetworkFlot(areaid, titleprefix, inpair, outpair){
|
|
var inArray = new Array();
|
|
var outArray = new Array();
|
|
var templength = 0;
|
|
var index = 0;
|
|
var maxvalue = 0;
|
|
var unitname = 'B';
|
|
var divisor = 1;
|
|
|
|
templength = inpair.length;
|
|
for (index = 0; index < templength; index += 2){
|
|
if (inpair[index + 1] > maxvalue){
|
|
maxvalue = inpair[index + 1];
|
|
}
|
|
}
|
|
|
|
templength = outpair.length;
|
|
for (index = 0; index < templength; index += 2){
|
|
if (outpair[index + 1] > maxvalue){
|
|
maxvalue = outpair[index + 1];
|
|
}
|
|
}
|
|
|
|
if (maxvalue > 3000000){
|
|
divisor = 1000000;
|
|
unitname = 'GB';
|
|
}
|
|
else if(maxvalue >= 3000){
|
|
divisor = 1000;
|
|
unitname = 'MB';
|
|
}
|
|
else{
|
|
//do nothing
|
|
}
|
|
|
|
templength = inpair.length;
|
|
for (index = 0; index < templength; index += 2){
|
|
inArray.push([(inpair[index] * 1000), (inpair[index + 1] / divisor)]);
|
|
}
|
|
|
|
templength = outpair.length;
|
|
for (index = 0; index < templength; index += 2){
|
|
outArray.push([(outpair[index] * 1000), (outpair[index + 1] / divisor)]);
|
|
}
|
|
|
|
$.jqplot(areaid, [inArray, outArray],{
|
|
title: titleprefix + ' Network Last Hour',
|
|
axes:{
|
|
xaxis:{
|
|
renderer : $.jqplot.DateAxisRenderer,
|
|
numberTicks: 4,
|
|
tickOptions : {
|
|
formatString : '%R',
|
|
show : true
|
|
}
|
|
},
|
|
yaxis: {
|
|
min : 0,
|
|
tickOptions:{formatString : '%d' + unitname}
|
|
}
|
|
},
|
|
legend : {
|
|
show: true,
|
|
location: 'nw'
|
|
},
|
|
series:[{label:'In'}, {label: 'Out'}],
|
|
seriesDefaults : {showMarker: false}
|
|
}
|
|
);
|
|
}
|
|
|
|
function createNodeStatusData(nodesStatus){
|
|
var index;
|
|
var nodesArray = nodesStatus.split(';');
|
|
var position = 0;
|
|
var nodename = '';
|
|
var index = 0;
|
|
var tempArray;
|
|
var tempStr = '';
|
|
var templength = nodesArray.length;
|
|
|
|
for (index in nodePath){
|
|
delete(nodePath[index]);
|
|
}
|
|
|
|
for (index in nodeStatus){
|
|
delete(nodeStatus[index]);
|
|
}
|
|
|
|
for (index = 0; index < templength; index++){
|
|
tempStr = nodesArray[index];
|
|
position = tempStr.indexOf(':');
|
|
nodename = tempStr.substring(0, position);
|
|
tempArray = tempStr.substring(position + 1).split(',');
|
|
|
|
switch(tempArray[0]){
|
|
case 'UNKNOWN':{
|
|
nodeStatus[nodename] = -2;
|
|
}
|
|
break;
|
|
case 'ERROR':{
|
|
nodeStatus[nodename] = -1;
|
|
}
|
|
break;
|
|
case 'WARNING':{
|
|
nodeStatus[nodename] = 0;
|
|
nodePath[nodename] = tempArray[1];
|
|
}
|
|
break;
|
|
case 'NORMAL':{
|
|
nodeStatus[nodename] = 1;
|
|
nodePath[nodename] = tempArray[1];
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
/**
|
|
* draw nodes current status, there are four type:
|
|
* a. unknown(gray): can not find save data for this node
|
|
* b. error(red): get status sometime early, but can not get now
|
|
* c. warning(orange): node are heavy load
|
|
* d. normal(green):
|
|
*
|
|
* @param
|
|
*
|
|
* @return Nothing
|
|
*/
|
|
function drawGangliaNodesArea(ordertype){
|
|
var index = 0;
|
|
var templength = 0;
|
|
var showStr = '';
|
|
var nodename = '';
|
|
var sortarray = new Array();
|
|
$('#gangliaNodes').html('<ul style="margin:0px;padding:0px;"></ul>');
|
|
//empty the hash
|
|
for (index in nodeStatus){
|
|
sortarray.push([index, nodeStatus[index]]);
|
|
}
|
|
|
|
if ('asc' == ordertype){
|
|
sortarray.sort(statusAsc);
|
|
}
|
|
else if('des' == ordertype){
|
|
sortarray.sort(statusDes);
|
|
}
|
|
else{
|
|
//do nothing
|
|
}
|
|
|
|
templength = sortarray.length;
|
|
for (index = 0; index < templength; index++){
|
|
nodename = sortarray[index][0];
|
|
switch(sortarray[index][1]){
|
|
case -2:{
|
|
showStr = '<li class="monitorunknown ui-corner-all monitornodeli" ' +
|
|
'title="' + nodename + '"></li>';
|
|
}
|
|
break;
|
|
case -1:{
|
|
showStr = '<li class="monitorerror ui-corner-all monitornodeli" ' +
|
|
'title="' + nodename + '"></li>';
|
|
}
|
|
break;
|
|
case 0:{
|
|
showStr = '<li class="mornitorwarning ui-corner-all monitornodeli" ' +
|
|
'title="' + nodename + '"></li>';
|
|
}
|
|
break;
|
|
case 1:{
|
|
showStr = '<li class="monitornormal ui-corner-all monitornodeli" ' +
|
|
'title="' + nodename + '"></li>';
|
|
}
|
|
break;
|
|
}
|
|
$('#gangliaNodes ul').append(showStr);
|
|
}
|
|
|
|
//bind all normal and warning nodes' click event
|
|
$('.monitornormal,.monitorwarning').bind('click', function(){
|
|
var nodename = $(this).attr('title');
|
|
window.open('ganglianode.php?n=' + nodename + '&p=' + nodePath[nodename],
|
|
'nodedetail','height=430,width=950,scrollbars=yes,status =no');
|
|
});
|
|
|
|
}
|
|
|
|
/**
|
|
* update all tab per minute.
|
|
*
|
|
* @param
|
|
*
|
|
* @return Nothing
|
|
*/
|
|
function updateGangliaPage(){
|
|
if ($('#gangliaNodes').size() < 1){
|
|
return;
|
|
}
|
|
|
|
sendGridCurrentAjax();
|
|
sendNodeCurrentAjax();
|
|
|
|
gangliaTimer = window.setTimeout('updateGangliaPage()', 60000);
|
|
}
|
|
|
|
function statusAsc(a, b){
|
|
return a[1] - b[1];
|
|
}
|
|
|
|
function statusDes(a, b){
|
|
return b[1] - a[1];
|
|
} |