Bring your virtualized networking stack to the next level

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1 Bring your virtualized networking stack to the next level Mike Kolesnik, Senior Software Engineer, Red-Hat FOSDEM February /42

2 Agenda ovirt network configuration Neutron overview Key features Integration benefits External providers Neutron as an external provider Future work 2/42

3 ovirt Network Configuration 3/42

4 Network View Network - a logical entity that represents a layer 2 broadcast domain Defined within the scope of a data center 4/42

5 Adding a New Network 5/42

6 Adding a New Network 6/42

7 Adding a New Network 7/42

8 Host Level Configuration 8/42

9 Adding Networks to a VM 9/42

10 Adding Networks to a VM 10/42

11 Integration Benefits Add support in ovirt for the various network technologies provided via Neutron plugins Leverage L3 services modeled in Neutron Enjoy both worlds: Neutron for managing VM networks ovirt for managing infrastructure networks (Migration network, storage network etc.) Neutron networks are exposed side by side with ovirt networks which allows the user to use ovirt mature implementation for network configuration 11/42

12 Neutron Overview 12/42

13 OpenStack Networking - Neutron Neutron provides network connectivity-as-a-service It offers a plug-in architecture designed to support various network technologies through vendor specific plug-ins and API extensions Exposes REST API for accessing the service Available plugins: Linux Bridge, OVS, ML2, Cisco Nexus, NVP, Ryu, NEC, etc... 13/42

14 Neutron high level architecture Neutron API API clients Neutron Plugin - Create network - Create network - Update network - Update network - Delete network - Delete network - Create Port... - Create Port... API extensions - Extensions Compute nodes configured according to selected plugin, by either: * Agent at each node * External network controller (e.g. UCSM) DB API + plugin = Neutron service Compute nodes 14/42

15 Key features in Neutron Better network virtualization using Overlay networks IPAM - IP Address Management Security Groups Virtualized services Virtual Routing VPN as a Service Firewall as a Service Load Balancing as a Service And many more, as a service.. 15/42

16 Key features in Neutron Better network virtualization using Overlay networks IPAM - IP Address Management Security Groups Virtualized services Virtual Routing VPN as a Service Firewall as a Service Load Balancing as a Service And many more, as a service.. 16/42

17 Why overlay? VLAN as the most basic virtual networking Very limited Hard to maintain No brains Overlay networks as the new virtual networking Unlimited Easy to maintain Can be smart - SDN In the end, depends on the use case 17/42

18 Key features in Neutron Better network virtualization using Overlay networks IPAM - IP Address Management Security Groups Virtualized services Virtual Routing VPN as a Service Firewall as a Service Load Balancing as a Service And many more, as a service.. 18/42

19 IPAM basics The cornerstones: Network Subnet Port Port gets IP from a Subnet IP gets delivered via DHCP Also gets other net info 19/42

20 Key features in Neutron Better network virtualization using Overlay networks IPAM - IP Address Management Security Groups Virtualized services Virtual Routing VPN as a Service Firewall as a Service Load Balancing as a Service And many more, as a service.. 20/42

21 Security Groups Segregate VMs from the world Allow in/outbound traffic One group to rule them all: Security Group Security rules Each port can have security group(s) 21/42

22 Integration bits 22/42

23 External Providers An external product that can be used to provide resources for ovirt Resources that can be provided: hosts, networks, etc.. Configure once, use everywhere 23/42

24 The Neutron External Provider Created as an external network provider Can be deployed with the user's choice of plugin Can be used in either of the flavors: ovirt centric Neutron is an implementation detail, the networks are actually managed in ovirt. Neutron centric Existing Neutron installation, ovirt is just a user of some of the networks. 24/42

25 How to Use Neutron in ovirt? It's simple! Just follow these few steps: 1. Install a Neutron instance 2. Add the instance as an external provider 3. Add networks on the provider: 3.1. Add a new network on the provider 3.2. Import networks 4. Install host with the provider's agent 5. Use the network in a VM's NIC 6. Run the VM 25/42

26 Step 1: Installing Neutron Install Neutron service and configure your choice of plugin Install Keystone Configure Keystone for the Neutron service 26/42

27 Step 2: Adding a Neutron Provider 27/42

28 Step 2: Adding a Neutron Provider 28/42

29 Step 3 (1): Adding a New Network 29/42

30 Step 3 (1): Adding a New Network 30/42

31 Step 3 (1): Adding a New Network 31/42

32 Step 3 (2): Importing Networks 32/42

33 Step 4: Installing Host With Agent 33/42

34 Step 4: Installing Host With Agent 34/42

35 Step 4: Installing Host With Agent 35/42 35/42

36 Step 5: Adding Network to a vnic 36/42

37 Step 6: Running the VM 37/42

38 Future Work 38/42

39 Future Work Integrate advanced services Improve VM scheduling, taking into account the networks availability on the host Which host has access to which network Monitor vnic connectivity after VM/vNIC started Integrate Security Group management Integrate L3 functionality Support more Plugin types 39/42

40 In Conclusion ovirt network configuration Neutron overview Key features Integration benefits External providers Neutron as an external provider Future work 40/42

41 More info Neutron ovirt Mailing lists IRC Channel #ovirt channel on irc.oftc.net 41/42

42 THANK YOU! Mike Kolesnik 42/42

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