Zend Framework 1.8.5 Manual
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With Amazon EC2 Reserved Instances, you can make a low one-time payment for each instance to reserve and receive a significant discount on the hourly usage charge for that instance.
Amazon EC2 Reserved Instances are based on instance type and location (region and Availability Zone) for a specified period of time (e.g., 1 year or 3 years) and are only available for Linux/UNIX instances.
Reserved Instances are applied to instances that meet the type/location criteria during the specified period. In this example, a user is running the following instances:
The user then purchases the following Reserved Instances.
Amazon EC2 applies the two m1.small Reserved Instances to two of the instances in Availability Zone us-east-1a. Amazon EC2 doesn't apply the two c1.medium Reserved Instances because the c1.medium instances are in a different Availability Zone and does not apply the m1.xlarge Reserved Instances because there are no running m1.xlarge instances.
Example #1 Describes Reserved Instances that you purchased.
describeInstances will return information about a reserved
instance or instances that you purchased.
describeInstances returns a multi-demential array that contains
reservedInstancesId, instanceType, availabilityZone, duration, fixedPrice,
usagePrice, productDescription, instanceCount and state.
$ec2_instance = new Zend_Service_Amazon_Ec2_Instance_Reserved('aws_key',
'aws_secret_key');
$return = $ec2_instance->describeInstances('instanceId');
Example #2 Describe current Reserved Instance Offerings aviable
describeOfferings Describes Reserved Instance offerings
that are available for purchase. With Amazon EC2 Reserved Instances,
you purchase the right to launch Amazon EC2 instances for a period of
time (without getting insufficient capacity errors) and pay a lower
usage rate for the actual time used.
describeOfferings returns a multi-demential array that contains
reservedInstancesId, instanceType, availabilityZone, duration, fixedPrice,
usagePrice and productDescription.
$ec2_instance = new Zend_Service_Amazon_Ec2_Instance_Reserved('aws_key',
'aws_secret_key');
$return = $ec2_instance->describeOfferings();
Example #3 Turn off CloudWatch Monitoring on an Instance(s)
purchaseOffering Purchases a Reserved Instance for use with your
account. With Amazon EC2 Reserved Instances, you purchase the right to launch
Amazon EC2 instances for a period of time (without getting insufficient capacity
errors) and pay a lower usage rate for the actual time used.
purchaseOffering returns the reservedInstanceId.
$ec2_instance = new Zend_Service_Amazon_Ec2_Instance_Reserved('aws_key',
'aws_secret_key');
$return = $ec2_instance->purchaseOffering('offeringId', 'instanceCount');
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