This document discusses building a multi-hypervisor OpenStack cloud with both KVM and vSphere. It clarifies that VMware is a company, not a product, and that OpenStack can manage multiple hypervisors including KVM and ESXi. The document focuses on principles for building resilient clouds, including scaling out rather than up, ensuring application resiliency, and treating virtual machines as cattle rather than pets. It also addresses using vSphere with OpenStack and the architecture of a multi-hypervisor OpenStack cloud.

1. Cattle Wrangling For Pet Whisperers:
Building A Multi-hypervisor OpenStack Cloud
with KVM and vSphere
Prepared by: Kenneth Hui
Date: October 22, 2013

2. Who Am I?
2

3. Where I’ve Been
3

4. 4
Clarifying Some Points

5. 5
VMware is a Company NOT a Product
• VMware as a company sells multiple technologies
and products
– vSphere
– vCloud
– End-user Computing
• VMware is in co-opetition with OpenStack
– Cooperation
• vSphere and Nova
• Nicira and Neutron
– Competition
• ESXi vs. KVM
• vCloud Automation Center (vCAC)
• vCloud Hybrid Service (vCHS)

6. 6
OpenStack Is NOT a Hypervisor
• OpenStack Nova is a manager of hypervisors
• OpenStack can manage multiple hypervisors
– https://wiki.openstack.org/wiki/HypervisorSupportMatrix

7. No vSphere Style HA Using KVM with libvirt
7

8. So What’s Wrong with OpenStack?
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9. 9
Let’s Talk Resiliency in the Cloud

10. Focus on Anti-fragility
10

11. Focus on Scaling Out
11

12. Focus on Application Resiliency
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13. 13
Use Cattle Not Pets
• Virtual Machines needs care and feeding
– Name the VM
– Tune and groom regularly
– Feed pets with good food and supplements
– Take pets to the vet when they are sick
• Cloud servers are disposable
– VMs are not unique
– Tune and groom apps not the cattle
– Replace when necessary
– Shoot the cattle when it is sick

14. Let Loose the Monkeys!
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15. 15
But I Still Want to Use vSphere in My Cloud

16. 16
So Why vSphere with OpenStack?
• Customers have sunk investments in vSphere
• Customers have legacy workloads that may not
be suitable for KVM with libvirt
• vSphere can provide an on-ramp to a Cloud
• Provides an alternative to VMware vCHS

17. vSphere Is Not
17

18. 18
Multi-hypervisor Cloud Architecture - Grizzly

19. 19
Multi-hypervisor Cloud Architecture - Havana

20. 20
Nova Compute Scheduling

21. 21
How Nova Scheduler Sees vSphere

22. 22
Potential Resource Mismatch

23. 23
Potential Resource Misplacement

24. 24
Make Use of Host Aggregates

25. 25
Let’s End with Some First Principles

26. Nothing Is Forever in the Cloud
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27. Understand Your Workload
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28. Embrace Automation
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29. Current IT Culture Must Change
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30. Embrace Cultural Change
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31. 31
Perhaps Most Importantly

32. Start With Why!
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Resources and Contact

34. 34
Resources
• OpenStack Configuration Reference
– http://docs.openstack.org/trunk/config-reference/content/section_computehypervisors.html
• vSphere with OpenStack Blog Posts
– http://cloudarchitectmusings.com/2013/06/24/openstack-for-vmwareadmins-nova-compute-with-vsphere-part-1/
– http://cloudarchitectmusings.com/2013/06/26/openstack-for-vmwareadmins-nova-compute-with-vsphere-part-2/
– http://cloudarchitectmusings.com/2013/07/09/openstack-compute-forvsphere-admins-part-3-ha-and-vm-migration/
– http://cloudarchitectmusings.com/2013/08/05/openstack-compute-forvsphere-admins-part-4-overcommitment-in-nova-compute/
– http://cloudarchitectmusings.com/2013/08/13/openstack-compute-forvsphere-admins-part-5-designing-for-vsphere-with-nova-compute

35. For More Information
You can reach me at:
Kenneth Hui
Open Cloud Architect
Rackspace
E-mail: ken.hui@rackspace.com
Twitter: @hui_kenneth
Blog: http://cloudarchitectmusings.com
Slides: http://www.slideshare.net/kenhui65/
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