This document discusses network as a service (NaaS) in OpenStack. It provides an overview of OpenStack, including its core projects like Nova, Swift, Glance, Keystone, and Horizon. It then describes NaaS and how two OpenStack projects, Quantum and Melange, provide NaaS functionality like software-defined networking, IP management, and network connectivity for VMs. Potential DevOps applications of NaaS in OpenStack are also outlined, such as simulating network failures for distributed systems testing in cloud environments. Finally, OpenStack community resources are highlighted.

1. Network as a
Service
in OpenStack
Ilya Alekseyev
ilyaalekseyev@acm.org

2. Agenda
1. OpenStack
2. Network as a Service
3. Network as a Service in OpenStack
4. DevOps applications
5. OpenStack Community

3. Agenda
1. OpenStack
2. Network as a Service
3. Network as a Service in OpenStack
4. DevOps applications
5. OpenStack Community

4. OpenStack
OpenStack – open source cloud software

5. OpenStack
OpenStack:
● truly open source cloud software (Apache2
license)
● open design process
● open development process
● open source code
● open community

6. OpenStack
OpenStack contains 5 projects:
● Compute (Nova) – Cloud fabric
● Storage (Swift) – Cloud storage
● Image service (Glance) – VM image
management
● Identity (Keystone) – user management
● Dashboard (Horizon) – cloud management
web interface

7. OpenStack
Nova
Swift
Glance
Keystone
Dashboard

8. OpenStack Nova
● VM lifecycle management
● Hypervisor agnostic: KVM, LXC, QEMU,
UML, VMWare ESX/ESXi, XenServer/XCP,
HyperV (before Essex release)
● 3 network models: Flat, FlatDHCP, VLAN
● Role based access control
● Block device management
● REST API: OpenStack & Amazon EC2

9. OpenStack Swift
● Redundant object storage
● High availability
● Leverages commodity hardware
● No single point of failure
● Multi-dimensional scalability
● REST API: OpenStack & Amazon S3

10. OpenStack Glance
● Image as a Service
● Container support:
ovf, bare, aki, ari,
ami
● Disk format
support: raw, vhd,
vmdk, vdi, iso,
qcow2, aki, ari, ami

11. OpenStack Keystone
● Provides unified authentication across all
OpenStack projects and integrates with
existing authentication systems
● Role based access control
● Storage support: KVS, SQLDB, LDAP, PAM

12. OpenStack Horizon
Web dashboard for cloud management

13. Agenda
1. OpenStack
2. Network as a Service
3. Network as a Service in OpenStack
4. Possible applications
5. OpenStack Community

14. Network as a Service
● multiple networks per tenant
● multiple network interfaces per VM
● ability to connect networks to VM network
interfaces
● isolation between networks
● control over IP addressing
● API for network management

15. Network as a Service
● multiple networks per tenant
● multiple network interfaces per VM
● ability to connect networks to VM network
interfaces
● isolation between networks
● control over IP addressing
● API for network management
Network infrastructure, but virtual

16. Agenda
1. OpenStack
2. Network as a Service
3. Network as a Service in OpenStack
4. DevOps applications
5. OpenStack Community

17. Network as a Service in OpenStack
I’m serious… and DON’T call me Shirley

18. Network as a Service in OpenStack
Two incubated OpenStack projects:
● Quantum – network connectivity as a service
○ software defined networks (SDN)
○ OpenFlow
○ QoS
○ Monitoring
● Melange – IP management
initial focus is on IP address management
(IPAM) and address discovery
(DHCP/dnsmasq) functionality

19. Network as a Service in OpenStack
Quantum
● Multiple networks per tenant
● Connection between VM network interface
(vNIC) and virtual networks
● L2 isolation support
Supported technology:
● OpenVSwitch
● Linux Bridge
● Cisco UCS/Nexus
● Ryu OpenFlow Controller

20. Agenda
1. OpenStack
2. Network as a Service
3. Network as a Service in OpenStack
4. DevOps applications
5. OpenStack Community

21. DevOps Applications
DevOps - collaboration and integration of IT
infrastructure operations, software
engineering and QA

22. DevOps Applications
DevOps in cloud:
● Dynamic
environment
● Changes in
environment could
be automated
● Ability to provide
same infrastructure
for development
and QA

23. DevOps Applications
Distributed system example
some cases for distributed systems that needs
network management capabilities

24. DevOps Applications
Distributed system troubles:
● Split Brain
Split-brain occurs when all of the private links go down simultaneously, but
the cluster nodes are still running.
● Data channel low throughput
Is network capabilities enough for your data flow?
● Site failures
Autonomous part of system failure
● Delayed messages
Messages to remote systems arrived too late
...

25. DevOps Applications
Cloud simulation with NaaS:
● Split Brain - disable connectivity between
cluster nodes
● Data channel low throughput - QoS on vNIC
● Site failures - creation of separate networks
for autonomous parts
● Delayed messages - simulate network
connectivity failures programmatically

26. Agenda
1. OpenStack
2. Network as a Service
3. Network as a Service in OpenStack
4. DevOps applications
5. OpenStack Community

27. OpenStack Community Resources
http://www.openstack.org
https://www.launchpad.net/~openstack
http://wiki.openstack.org

28. OpenStack Community in Russia

29. OpenStack Community in Russia
http://www.oscloud.ru
http://www.openstack.ru

30. Thank you
Ilya Alekseyev
Russian OpenStack Community
http://www.oscloud.ru
ilyaalekseyev@acm.org