Quantum Networks

4. OpenStack: core projects that form a complete IaaS solution Compute (Nova) Provision and manage virtual machines Dashboard (Horizon) Self-service portal Image (Glance) Catalog and manage server images Identity (Keystone) Unified authentication, integrates with existing systems Network(Quantum) provide "network connectivity as a service" Object Storage (Swift) petabytes of secure, reliable object storage adapted from: http://26a0ff8ca8ba32139f7d-db711c577a50b6bdc946ea71aaca027d.r97.cf1.rackcdn.com/openstack-conceptual-arch-folsom.jpg / Block Storage 4 (Cinder) © 2012 IBM Corporation

10. One of Deployment Models ■ Management network. Used for internal communication between OpenStack Components. The IP addresses on this network should be reachable only within the data center. ■ Data network. Used for VM data communication within the cloud deployment. The IP addressing requirements of this network depend on the Quantum plugin in use. ■ External network. Used to provide VMs with Internet access in some deployment scenarios. The IP addresses on this network should be reachable by anyone on the Internet. ■ API network. Exposes all OpenStack APIs, including the Quantum API, to tenants. The IP addresses on this network should be reachable by anyone on the Internet. This may be the same network as the external network, as it is possible to create a quantum subnet for the external network that uses IP allocation ranges to use only less than the full range of IP addresses in an IP block. from http://docs.openstack.org/trunk/openstack-network/admin/content/connectivity.html © 2012 IBM Corporation

12. Components of quantum ■ Quantum server  Implement Qauntum API and its l3-agent extensions  Enforce network model Quantum • Network, subnet, and port  IP addressing to each port server & plugin Plugin ■ Plugin agent agent  Run on each compute node  Connect instances to network port ■ DHCP agent  In multi-host mode, run on each compute node (deferred)  Start/stop dhcp server DHCPagent  Maintain dhcp configuration DB Queue  L3-agent  To implement floating Ips and other L3 features, such as NAT  One per network ■ Queue  Enhance communication between each Note: we can share DB service and Queue components of quantum with other OpenStack stack services ■ DB – persistent network model 12 © 2012 IBM Corporation

13. Layers in Quantum server vendor can add extensions Quantum API and extensions to provide more features Common service (Validation, Authn, Authz) Quantum Core Plugin API vendor specific plugin or open source plugin: 1. linux bridge plugin 2. openvswitch plugin Plugin 3. nicira 4. … DB device 13 © 2012 IBM Corporation

16. Network and physical bindings network Physical network Virtual network Identified by name Model in quantum Network binding Tenant network provider network GRE and local bindings have VLAN no physical network Flat GRE Local binding are for local devstack single box playing Linux bridge plugin has no GRE support Difference between provider network and tenant network? © 2012 IBM Corporation

17. Other ways to view networks internal Private internal networks Shared internal networks Only fixed Ips are allocated from there. external we can create floating ips and Private external networks shared external networks router gateway on it, They should be able to access public network Other tenants private Only owner tenant shared besides the owner can create ports tenant can create on it. ports on it. © 2012 IBM Corporation

18. A network sample for fixed ips Host A network A local Vlan ID 1 network C local Vlan ID 3 int-br-eth1 patch-tun br-int patch-port veth int-br-eth2 network B local Vlan ID 2 phy-br-eth1 patch-int phy-br-eth2 Physnet1 vSwitch Physnet2 vSwith br-eth1 br-eth2 br-tun GRE eth1 eth2 VM ports Physical net1 physical net2 vlan ID 1000 Flat host B DHCP ports host C host C local vlan id <-> tunnel id done by br-tun flow local vlan id <-> physical net vlan id done by physical net and br-int vSwitch © 2012 IBM Corporation

19. Floatingip and Router Vm 10.0.1.5/24 gw: 10.0.1.1/24 Floating ip fixed port on fixed ip network Floatingip port Router interface 10.0.1.1/24 In general, gw_port The port acting as 7.0.1.2/24 router interface Floating ip: should has gateway 7.0.1.4/24 address of subnet External network internal nework router external network vswitch br-ex Vm 20.0.1.5/24 eth0 gw: 20.0.1.1/24 l3_agent Router is used for VM to access outside and allow VMs on different subnets or networks access each other Floating IP is used for outside to access VM © 2012 IBM Corporation

20. A network sample for fixed ips and routers Host B Host A ovs-quantum-agent L3-agent ovs-quantum-agent network A network A network C dhcp-agent local Vlan ID 3 local Vlan ID 2 local Vlan ID 1 network C local Vlan ID 3 br-int br-int external network B local Vlan ID 1 network B network D local Vlan ID 2 binding: local Physnet1 vSwitch Physnet2 vSwith Physnet1 vSwitch Physnet2 vSwith br-ex br-tun br-tun br-eth1 br-eth2 br-eth1 br-eth2 GRE GRE eth0 eth1 eth1 eth2 eth2 VM ports public net Physical net1 DHCP ports vlan ID 1000 physical net2 Flat Router interface ports Router gateway and flaoting ip ports © 2012 IBM Corporation

22. AMQP communication among quantum components Dhcp agent quantum-server get_active_networks get_network_info get_dhcp_port release_dhcp_port release_port_fixed_ip update_lease_expiration Plugin agent Quantum rest api (resource CUD) get_device_details update_device_down network_delete tunnel_update port_update tunnel_sync q-agent-notifier- q-agent-notifier- q-agent-notifier- Quantum network-delete_fanout tunnel-update_fanout port-update_fanout Exchange: topic fanout fanout fanout q-agent-notifier- q-agent-notifier- q-agent-notifier- Queue: q-plugin notifications.info tunnel-update_fanout port-update_fanout network-delete_fanout _{uuid4} _{uuid4} _{uuid4} Comsumer: quantum-server Dhcp agent Plugin agent © 2012 IBM Corporation

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