Pull 'running' history from graphite on dashboard init

public/lib/stats-vcloud-running.js

@@ -9,10 +9,32 @@ var stats_vcloud_running__svg   = {};
 
 var stats_vcloud_running__data__total = 0;
 
-d3.json( running_url,
+d3.json( running_url+'?history=1',
 
   function( stats_vcloud_running__data ) {
 
+    if ( typeof stats_vcloud_running__data[ 'stack' ] === 'undefined' ) {
+      stats_vcloud_running__data[ 'stack' ] = [];
+    }
+
+    var mytmphash  = [];
+
+    for ( var c = 0; c < 500; c++ ) {
+      for ( var key in stats_vcloud_running__data ) {
+        if ( ! stats_vcloud_running__data[ key ][ 'history' ] ) {
+          continue;
+        }
+
+        if ( ! stats_vcloud_running__data[ key ][ 'history' ][ c ] ) {
+          mytmphash[ key ] = 0;
+        }
+        else {
+          mytmphash[ key ] = stats_vcloud_running__data[ key ][ 'history' ][ c ];
+        }
+      }
+      stats_vcloud_running__data[ 'stack' ].push( mytmphash );
+    }
+
     ( function tick() {
       setTimeout( function() {
 
@@ -62,8 +84,6 @@ d3.json( running_url,
         var stack = d3.layout.stack()
           .values( function( d ) { return d.values; } );
 
-        var stats_vcloud_running__data__stack = {};
-
         if ( typeof stats_vcloud_running__data[ 'stack' ] === 'undefined' ) {
           stats_vcloud_running__data[ 'stack' ] = [];
         }

vmware-host-pooler-api

@@ -122,6 +122,41 @@ get '/dashboard/stats/vcloud/running' do
     result[pool['major']]['running'] = result[pool['major']]['running'].to_i + running.to_i
   end
 
+  if ( params[:history] )
+    if ( config[:config]['graphite'] )
+      history ||= Hash.new
+
+      begin
+        buffer = open( 'http://'+config[:config]['graphite']+'/render?target=vcloud.running.*&from=-1hour&format=json' ).read
+        history = JSON.parse( buffer )
+
+        history.each do |pool|
+          if pool['target'] =~ /.*\.(.*)$/
+            pool['name'] = $1
+            pool['major'] = $1 if pool['name'] =~ /^(\w+)\-/
+
+            if ( result[pool['major']] )
+              pool['last'] = result[pool['major']]['running']
+              result[pool['major']]['history'] ||= Array.new
+
+              pool['datapoints'].each do |metric|
+                3.times do |n|
+                  if ( metric[0] )
+                    pool['last'] = metric[0].to_i
+                    result[pool['major']]['history'].push( metric[0].to_i )
+                  else
+                    result[pool['major']]['history'].push( pool['last'] )
+                  end
+                end
+              end
+            end
+          end
+        end
+      rescue
+      end
+    end
+  end
+
   content_type :json
   JSON.pretty_generate(result)
 end