Openstack is an open source cloud operating system that manages large pools of compute, storage, and networking resources. It consists of several components including Nova (compute), Neutron (networking), Glance (images), Keystone (identity), and Cinder (block storage). The major hypervisor options supported by Openstack are KVM, XenServer, and vSphere. Common deployment models include a basic 3 node architecture with separate controller and compute nodes, or a scaled compute-only environment.

1. Openstack architecture
(part1)
mCloud department discussion 20/06/2014

2. Agenda
 Introduction Openstack Architecture
 Component of Openstack
 Hypervisor Platform for Openstack
 Deployment model

3. Introduction Openstack
Architecture

4. What is Openstack?
Openstack is a cloud operating system that controls
large pools of compute, storage, and networking
resource throughout a datacenter, all managed
through a dashboard

6. Component of Openstack

7. The Conceptual Architecture

8. http://www.slideshare.net/kenhui65/getting-started-with-openstack-20130821-25506318

9. Openstack compute – nova component
http://cloudarchitectmusings.com/2013/06/24/openstack-for-vmware-admins-nova-compute-with-vsphere-part-1/

10. Openstack compute – nova component
(cont.)
Services Function
Nova-api Accept and responds to end-user compute
API calls
Nova-scheduler Specifically, which compute node
instance should run on
Nova-compute Create and terminate VM instance via
hypervisor APIs
Nova-conductor Mediates interactions between nova-
compute and the database
Nova-database Store most of the build-time and run-
time state for a cloud infrastructure
Queue Provide a central hub for passing
messages between daemons

11. Openstack network – Neutron Component
http://www.slideshare.net/emaganap/open-stack-overview-meetups-oct-2013

12. Glance Images store
http://ilearnstack.com/2013/04/23/introduction-to-openstack-2/

13. Glance images store (cont.)
Glance-api
It accept Image API calls for image
discovery, image retrieval and
image storage
Glance-registry It store, procces and retrieves
metadata about image(size,
type..)
Glance-database Store the image metadata

14. Keystone identity
Keystone handles API requests as well as providing configurable catalog
Policy, token and identity services.
It provides the ability to add users to groups, and to manage
permissions between user and groups.Permission include the ability to
launch and terminate instance.

15. Block storage - cinder

16. Block storage – cinder (cont.)
Cinder-api Accept requests and routes them
to cinder-volume for action
Cinder-volume
Manages block storage devices,
specifically the back-end device
themselves
Cinder-scheduler
Schedules and routes request to
the appropriate volume service

17. Hypervisor Platform for
Openstack

18. Hypervisor Types
Type 1 (or native, bare metal)
Hypervisors run directly on the host’s
hardware to control the hardware and
to manage guest operating systems
Type 2 ( or hosted)
Hypervisors run within a conventional
operating-system environment, with
the hypervisor layer as a distinct
second software level, guest
operating-systems run at the third
level above the hardware

19. 2 Hypervisor types

20. Hypervisor support Openstack
Group A: These drivers are fully
supporteds KVM
Group B: These drivers are in a bit of
middle ground
Hyper-V
Vmware
Xenserver 6.2
Group C: These drivers have minimal
testing and may or may not work at
any given time (deprecated in
icehouse)
Docker
Xen via libvirt
LXC via libvirt

21. Leading hypervisor options

22. XenServer 6.2
Feature
Source code model Open Source (GPLv2)
Maximum VM Density 650 (Linux)
OpenStack driver OpenStack nova-compute domU
Maximum native cluster size 16
Maximum pRAM 1 TB
Largest VM 16 vCPU/128GB
Windows Operating System All Windows supported by
Microsoft
Linux Operating Systems RHEL, CentOS, Debian, Ubuntu,
SLES, OEL

23. vSphere 5.5
Feature
Source code model Proprietary
Maximum VM Density 512
OpenStack driver vCenter – nova-compute node per
cluster
Maximum native cluster size 32
Maximum pRAM 4 TB
Largest VM 64 vCPU/1TB
Windows Operating Systems DOS, All Windows Server/Client
Linux Operating Systems Most

24. KVM
Feature
Source code model Open Source (GPLv2)
Maximum VM Density 8 times the number of pCores
OpenStack driver libvirt driver
Maximum native cluster size No native cluster support
Maximum pRAM 2 TB
Largest VM 160 vCPU/2TB
Windows Operating Systems Windows XP and higher
Linux Operating Systems Varies

25. Deployment model

26. Basic architeture –3 node

27. Basic architecture – compute
scale

28. End of Part One
Thanks!