/scalr-2/tags/scalr-2.1.0/app/src/Modules/Platforms/Ec2/Helpers/Elb.php

<?php



	class Modules_Platforms_Ec2_Helpers_Elb

	{

		public static function farmValidateRoleSettings($settings, $rolename)

		{

			

		}

		

		public static function farmUpdateRoleSettings(DBFarmRole $DBFarmRole, $oldSettings, $newSettings)

		{



			$DBFarm = $DBFarmRole->GetFarmObject();

			

			$Client = Client::Load($DBFarm->ClientID);

			

			$AmazonELB = Scalr_Service_Cloud_Aws::newElb(

				$DBFarmRole->GetSetting(DBFarmRole::SETTING_CLOUD_LOCATION),

				$DBFarm->GetEnvironmentObject()->getPlatformConfigValue(Modules_Platforms_Ec2::ACCESS_KEY),

				$DBFarm->GetEnvironmentObject()->getPlatformConfigValue(Modules_Platforms_Ec2::SECRET_KEY)

			);

			

			// Load balancer settings

        	if ($newSettings[DBFarmRole::SETTING_BALANCING_USE_ELB] == 1)

        	{

        		// Listeners

				$DBFarmRole->ClearSettings("lb.role.listener");

        		$ELBListenersList = new ELBListenersList();

			    $li = 0;

			    foreach ($newSettings as $sk=>$sv)

			    {

			    	if (stristr($sk, "lb.role.listener"))

			    	{

			    		$li++;

			    		$listener_chunks = explode("#", $sv);

			    		$ELBListenersList->AddListener($listener_chunks[0], $listener_chunks[1], $listener_chunks[2]);

			    		$DBFarmRole->SetSetting("lb.role.listener.{$li}", $sv);

			    	}

			    }			

        		

			    $avail_zones = array();

        		$avail_zones_setting_hash = "";

			    foreach ($newSettings as $skey => $sval)

			    {

			    	if (preg_match("/^lb.avail_zone.(.*)?$/", $skey, $macthes))

			    	{

			    		if ($sval == 1)

			    			array_push($avail_zones, $macthes[1]);

			    			

			    		$avail_zones_setting_hash .= "[{$macthes[1]}:{$sval}]";

			    	}

			    }

			    

			    if (!$DBFarmRole->GetSetting(DBFarmRole::SETTING_BALANCING_HOSTNAME))

        		{

        			$elb_name = sprintf("scalr-%s-%s", $DBFarm->Hash, rand(100,999));

	        			

        			//CREATE NEW ELB

        			$elb_dns_name = $AmazonELB->CreateLoadBalancer($elb_name, $avail_zones, $ELBListenersList);

        			

        			if ($elb_dns_name)

        			{

	        			$DBFarmRole->SetSetting(DBFarmRole::SETTING_BALANCING_HOSTNAME, $elb_dns_name);

	        			$DBFarmRole->SetSetting(DBFarmRole::SETTING_BALANCING_NAME, $elb_name);

	        			$DBFarmRole->SetSetting(DBFarmRole::SETTING_BALANCING_AZ_HASH, $avail_zones_setting_hash);

	        			

	        			$register_servers = true;

        			}

        		}

        		

        		if ($DBFarmRole->GetSetting(DBFarmRole::SETTING_BALANCING_NAME))

        		{

					$ELBHealthCheckType = new ELBHealthCheckType(

						$newSettings[DBFarmRole::SETTING_BALANCING_HC_TARGET],

						$newSettings[DBFarmRole::SETTING_BALANCING_HC_HTH],

						$newSettings[DBFarmRole::SETTING_BALANCING_HC_INTERVAL],

						$newSettings[DBFarmRole::SETTING_BALANCING_HC_TIMEOUT],

						$newSettings[DBFarmRole::SETTING_BALANCING_HC_UTH]

					);

        			

					$hash = md5(serialize($ELBHealthCheckType));

					

					if ($elb_name || ($hash != $DBFarmRole->GetSetting(DBFarmRole::SETTING_BALANCING_HC_HASH)))

					{

	        			//UPDATE CURRENT ELB

	        			$AmazonELB->ConfigureHealthCheck(

	        				$DBFarmRole->GetSetting(DBFarmRole::SETTING_BALANCING_NAME),

	        				$ELBHealthCheckType

	        			);

	        			

	        			$DBFarmRole->SetSetting(DBFarmRole::SETTING_BALANCING_HC_HASH, $hash);

					}

					

					// Configure AVAIL zones for the LB

					if (!$elb_name && $avail_zones_setting_hash != $DBFarmRole->GetSetting(DBFarmRole::SETTING_BALANCING_AZ_HASH))

					{

						$info = $AmazonELB->DescribeLoadBalancers(array($DBFarmRole->GetSetting(DBFarmRole::SETTING_BALANCING_NAME)));

						$elb = $info->DescribeLoadBalancersResult->LoadBalancerDescriptions->member;

						

						$c = (array)$elb->AvailabilityZones;

						

						if (!is_array($c['member']))

							$c_zones = array($c['member']);

						else

							$c_zones = $c['member'];

							

						$add_avail_zones = array();

						$rem_avail_zones = array();

						foreach ($newSettings as $skey => $sval)

					    {

					    	if (preg_match("/^lb.avail_zone.(.*)?$/", $skey, $m))

					    	{

								if ($sval == 1 && !in_array($m[1], $c_zones))

									array_push($add_avail_zones, $m[1]);

								

								if ($sval == 0 && in_array($m[1], $c_zones))

									array_push($rem_avail_zones, $m[1]);

					    	}

					    }

					    

					    if (count($add_avail_zones) > 0)

					    {

					    	$AmazonELB->EnableAvailabilityZonesForLoadBalancer(

								$DBFarmRole->GetSetting(DBFarmRole::SETTING_BALANCING_NAME),

								$add_avail_zones

							);

					    }

					    

						if (count($rem_avail_zones) > 0)

					    {

					    	$AmazonELB->DisableAvailabilityZonesForLoadBalancer(

								$DBFarmRole->GetSetting(DBFarmRole::SETTING_BALANCING_NAME),

								$rem_avail_zones

							);

					    }

						

						$DBFarmRole->SetSetting(DBFarmRole::SETTING_BALANCING_AZ_HASH, $avail_zones_setting_hash);

					}

        		}

        		

        		if ($register_servers)

        		{

	        		$servers = $DBFarmRole->GetServersByFilter(array('status' => SERVER_STATUS::RUNNING));

	        		$instances = array();

	        		foreach ($servers as $DBServer)

		        		$instances[] = $DBServer->GetProperty(EC2_SERVER_PROPERTIES::INSTANCE_ID);

	        			

		        	if (count($instances) > 0)

		        	{

		        		$AmazonELB->RegisterInstancesWithLoadBalancer(

		        			$DBFarmRole->GetSetting(DBFarmRole::SETTING_BALANCING_NAME),

		        			$instances

		        		);

		        	}

        		}

        	}

        	else

        	{

        		if ($oldSettings[DBFarmRole::SETTING_BALANCING_HOSTNAME])

        		{

        			$AmazonELB->DeleteLoadBalancer($DBFarmRole->GetSetting(DBFarmRole::SETTING_BALANCING_NAME));

        					        			

        			$DBFarmRole->SetSetting(DBFarmRole::SETTING_BALANCING_NAME, "");

        			$DBFarmRole->SetSetting(DBFarmRole::SETTING_BALANCING_HOSTNAME, "");

        			$DBFarmRole->SetSetting(DBFarmRole::SETTING_BALANCING_USE_ELB, "0");

        			$DBFarmRole->SetSetting(DBFarmRole::SETTING_BALANCING_HC_HASH, "");

        			$DBFarmRole->ClearSettings("lb.avail_zone");

        			$DBFarmRole->ClearSettings("lb.healthcheck");

        			$DBFarmRole->ClearSettings("lb.role.listener");

        		}

        	}

		}

	}



?>