1. HybridStack
Presented by,!
Sirushti Murugesan, Pavan Sudheendra,!
Rohith Ananth, Ahmed Shabib,!
Vidhisha Nair, Abdul Hannan Kanji,!
Kruti Bhat, Swati Bhat,!
Akhilesh Hegde
Under the guidance of !
Prof. Dinkar Sitaram,CSE!
Prof. Phalachandra,CSE!
Centre for Cloud Computing and Big Data, PESIT!

2. Motivation and Background
• Explore Hybrid Cloud Federated
Architectures.!
• Design and Implement a mechanism for cloud
bursting and migrating for OpenStack.!
• Contribute to the OpenStack community.

3. Objectives
• Bursting across different deployments.!
• Workload Migration policies. !
• Support for:!
o Scalability !
o High Availability !
• Interface OpenStack with different clouds.
!
• Design and implement decision-making algorithms for !
• Moving Data To Compute!
• Moving Compute To Data

4. High Level Architecture
Private Cloud Public Cloud

5. Nova Cells
A separate database and message broker per
cell.!
Inter-cell communication via pluggable driver.
Eg:- RPC.!
Top Cells consist of KeyStone, Glance, Nova-
API, Nova-Cells and a Nova-Cells Scheduler.!
Child Cells consist of Nova-Compute, Nova-
Cells, Nova-Network.

6. Nova Cells Architecture
Child Cell
Private !
Cloud!
Resources
Private!
Cloud!
Resources
Child Cell
Top Cell/
Cells
Scheduler
Child Cell
Private!
Cloud!
Resources

7. Implemented Architecture
Child Cell
Top - Cell/
Cells
Scheduler
Private !
Cloud!
Resources
Pseudo -
Child Cell
Public!
Cloud!
Resources

8. Pseudo-Child Cell
Nova-API
Compute-API
Virtualization
Handle incoming Messages and
Update Top Cell about status.
Interface that speaks to the public
Cloud to execute resource
requests.
Updates Database and makes Call
to Interface Driver.
Nova Cells(Child)
Nova-Compute
VirtualizationInterface to the
Public Cloud

9. Integration with Amazon
Child Cell
Top - Cell /
Cells
Scheduler
Private !
Cloud!
Resources
Pseudo -
Child Cell
Public!
Cloud!
Resources

10. Integration with Amazon
• Integration with Amazon Virtual Private Cloud!
• Ability to choose public/private IP Subnets for
VM’s.!
• Compatibility with Hardware VPN.!
• Specify Custom Routing Tables/Firewall Rules.

11. Current Lab Deployment
Private Cloud
Child Cell
Public Cloud
Pseudo-Child
Cell
Top Cell
VPN/
Firewall Node
VPN/NAT/
Firewall Node
Private Cloud Public Cloud
Transport Layer
Security

12. Introduction of a Policy Manager -
HEAT
• Orchestration Of Services Across
Infrastructure.!
• Policy Manager for decision-making to burst/
migrate.!
• Cloud Formation Templates Compatible!
• Support for AutoScaling.!
!

13. HEAT with Cells
• Assume Cells as Availability Zones. !
• Use CloudFormation templates to scale
across Cells.!
• Use simple Scheduler Hints to pick
appropriate Child Cell.

14. OpenStack - OpenStack
Bursting

Bursting across various Availability zones running
OpenStack Cloud using the concept of OpenStack
Cells.!
Both the clouds are running on OpenStack using cells. !
 The third party OpenStack child cell is attached as the
child cell of the native OpenStack parent cell. !
 Federation Strategies using KeyStone for added
security.

15. Future Improvements
• Integration with Grizzly keystone!
• Integration with Quantum!
• Openstack to Openstack bursting!
• Migrate and Burst

16. Thank You
Contact Us:
Sirushti Murugesan : sirushtim@gmail.com
Vidhisha Nair : vidhishanair@gmail.com