I would like to work on enhancing EIP/ELB functionality present in CloudStack, so that highly available and fault-tolerant application can be architected using CloudStack deployments at a region level. EIP and ELB are both AWS networking features that help building fault-tolerant, highly available application architectures on top of AWS [1],[2],[3]. Idea of this enhancement is to leverage the RHI (Route Health Injection) and GSLB functionalities available in application delivery controllers that provide HA/DR solutions in Active-Active data centre configuration to provide AWS style EIP and ELB functionality in CloudStack. I opened enhancement requests 652, 653 for tracking.
CLOUDSTACK-652: High Availability: EIP enhancements CLOUDSTACK-653: High Availability: implement GSLB (Global Server Load Balancing) capability for ELB service Also another complementery effort I would like to work on is close the gap between CloudStack implementation of ELB with that of AWS w.r.t to CloudStack ability to auto-scale up/down request handling capacity. This would require CloudStack to orchestrate provisioning load balancer appliances. I opened enhancement requests 654, 655 for tracking. 655 is pre-requisite for 654. CLOUDSTACK-654: ELB: auto-scale request handling capacity by provisioningLB appliances CLOUDSTACK-655: framework for CloudStack to orchestrate virtual network appliances to provide network services This effort in general would involve two parts. First, coming up with framework/abstraction/generic configuration etc with out any particular assumption of ADC or network appliance. Second, ADC/appliance specific implementation that would realise the functionality. For the second part, I would be primarily working on NetScaler ADC. If any one interested in contributing support for other appliances/ADC I would be happy to work toward integration. I would be starting POC to uncover the issue in supporting cross zone operation with CloudStack. I hope to come with up a functional requirements spec by early next week. [1] http://media.amazonwebservices.com/AWS_Disaster_Recovery.pdf [2] http://media.amazonwebservices.com/AWS_Building_Fault_Tolerant_Applications .pdf [3] http://support.rightscale.com/09-Clouds/AWS/02-Amazon_EC2/Designing_Failove r_Architectures_on_EC2/00-Best_Practices_for_using_Elastic_IPs_(EIP)_and_Av ailability_Zones -Murali
