WUG #009 - OpenVNet 0.7 presentation
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- 1. What do we do at Axsh? Virtualization Cloud computing
Distributed systems Free open source software
- 2. Our two main FOSS projects Wakame-vdc http://wakame-vdc.org
OpenVNet http://openvnet.org http://github.com/axsh
- 3. What is Wakame-vdc? Instance Instance Instance WebAPI *
Instance = Virtual Server User Http SSH
- 4. What is OpenVNet A Network hypervisor A way to fully
virtualize networks
- 5. What is OpenVNet A Network hypervisor A way to fully
virtualize networks
- 6. What is virtualization Let's explain using virtual machines
Hardware Operating system Hypervisor (VMWare, KVM, VirtualBox,
etc.) VM OS (Linux) VM OS (Windows) VM OS (MacOS)
- 7. What is virtualization Virtual machines become indipendent
of hardware Hardware (Laptop PC) Operating system (Linux)
Hypervisor (VirtualBox) VM OS VM OS VM OS Hardware (iMac) Operating
system (MacOS) Hypervisor (VirtualBox)
- 8. Network virtualization The concept is similar Networks
become indipendent of hardware Hardware (hubs, routers, bridges,
etc.) Hypervisor (OpenVNet) Virtual Network NIC 10.0.0.0/24
10.10.0.0/24 10.10.0.0/24 NIC NIC Virtual Network NIC NIC NIC
Internet Virtual Network NIC NIC NIC 10.90.0.0/24 10.80.0.0/24
10.90.0.0/24
- 9. Some use cases Cloud systems like Wakame-vdc or OpenStack
can allow users to create their own custom network layout Separate
cloud systems can be tied together into a single L2 Network Use
your imagination
- 10. How do we achieve this? Short answer: We use OpenFlow
https://www.opennetworking.org/sdn-resources/openflow Long answer:
Let's refresh how networks work in the first place.
- 11. Layer 1: The Physical Layer Two NICs are connected by a
cable They can now exchange ones and zeroes
- 12. Layer 1: The Physical Layer Two NICs are connected by a
cable They can now exchange ones and zeroes What if we want to
connect more than two NICs?
- 13. Layer 2: The Data Link Layer Each NIC has a unique MAC
address Everyone broadcasts Ethernet frames The OS opens Ethernet
frames sent to its NIC's MAC address
- 14. Layer 2: The Data Link Layer What is we want to create
large networks? We can't just keep broadcasting everywhere
- 15. Layer 3: The Network Layer Connects multiple L2 networks
using routers NICs are assigned IP addresses A broadcast (ARP) is
made to match IP to MAC
- 16. So how does OpenVNet virtualize this? All network devices
have flow tables Network traffic: Comes in a certain port Is
matched against those flow tables Is sent out a certain port
OpenFlow is a protocol to tell network devices to change their flow
tables
- 17. OpenFlow Switch Network Switch OpenFlow Controller OpenFlow
Implementation Flow tables Port Port Port Port SSL NIC NICNIC NIC
Network traffic
- 18. OpenVNet's OpenFlow Controller OpenVNet has an OpenFlow
controller called VNA OpenVNet currently requires the use of Open
vSwitch VNA VNA Open vSwitch Open vSwitch
- 19. Tunneling protocols OpenVNet uses two tunneling protocols
to implement virtual networks MAC2MAC: An original protocol that
works on Layer 2 GRE A protocol that works on Layer 3
- 20. Tunneling protocols VNA VNA Open vSwitch Open vSwitch VNA
Open vSwitch
- 21. Tunneling protocols VNA VNA Open vSwitch Open vSwitch VNA
Open vSwitch MAC2MAC
- 22. Tunneling protocols VNA VNA Open vSwitch Open vSwitch VNA
Open vSwitch GRE
- 23. OpenVNet under the hood NIC NIC NIC Vnmgr (virtual network
manager) 0mq http Open vSwitch VNA NIC NIC NIC Open vSwitch VNA
WebAPI MySQL Physical Network
- 24. Demo time We will tie Wakame-vdc and Amazon EC2 together
into one virtual network Wakame-vdc has OpenVNet support Amazon EC2
does not So... what do we do?
- 25. Demo time We will tie Wakame-vdc and Amazon EC2 together
into one virtual network Wakame-vdc has OpenVNet support Amazon EC2
does not So... what do we do? VNet Edge!
- 26. VNet Edge Allows a virtual network and a physical (= non
OpenVNet) network to join together into one L2 segment VNA VNA Open
vSwitch Open vSwitch VNet Edge Non OpenVNet network
- 27. VNet Edge is rather simple Open vSwitch/VNA checks if it
has the destination for a packet in its virtual network If yes,
send it there If no, send it out VNet Edge
- 28. Demo time Without further ado...