Network Function Virtualization over Open DC/OS Yung-Han Chen

Transcription

1 Network Function Virtualization over Open DC/OS Yung-Han Chen

2 Outlines Network Function Virtualization (NFV) Framework Container-based Open Source Solutions for NFV Use Cases 2

3 NFV Architectural Framework ETSI GS NFV 002 v1.2.1 Orchestration Layer Application Layer (e.g. vepc, vcpe) Infrastructure Layer (e.g. HW, Cloud OS) Source: ETSI 3

4 Infrastructure Layer - NFVI The HW & SW environment in which VNFs are deployed, managed and executed HW: computing (e.g. COTS), storage (e.g. NAS), network (e.g. NIC/switch/router) Virtualization Layer abstracts the hardware resources and decouples the VNF software from the underlying hardware, thus ensuring a hardware independent lifecycle for the VNFs From the VNF's perspective, the virtualization layer and the hardware resources look like a single entity providing the VNF with desired virtualized resources Virtualized Infrastructure Manager(s) VIM(s) Control and manage the interaction of a VNF with computing, storage and network resources 4

5 Application Layer Virtualized Network Function (VNF) Virtualization of a network function in a legacy non-virtualized network E.g. EPC, MME, DHCP, Functional behavior and external operational interfaces of a VNF are expected to be the same as a PNF One VNF can be deployed over one or multiple VMs Element Management (EM) EM performs the typical management functionality for one or several VNFs VNF Manager VNF lifecycle management (e.g. instantiation, update, query, scaling, termination) Multiple VNF Managers may be deployed 5

6 Orchestration Layer NFV Orchestrator The NFV Orchestrator is in charge of the orchestration and management of NFV infrastructure and software resources, and realizing network services on NFVI OSS/BSS Refers to the OSS/BSS of an operator 6

7 Reference Points VI-Ha: Virtualization Layer Hardware Resources Vn-Nf: VNF NFVI Or-Vnfm: NFV Orchestrator VNF Manager Vi-Vnfm: VIM VNF Manager Or-Vi: NFV Orchestrator VIM Nf-Vi: NFVI VIM Os-Ma: OSS/BSS MANO Ve-Vnfm: VNF/EM VNF Manager 7

8 Container-based Virtualization Technologies in NFVI Source: ETSI Through host OS kernel, the container execution environment provides kernel services including process control, memory management, file & file system management, device management, communication services and system information maintenance 8

9 Container-Based NFV Solution OSS/BSS Os-Ma NFVO (Orchestrator) VNFs (in containers) Vn-Nf Ve- Vnfm VNFM Marathon Vi-Vnfm NFVI VIM Core Services Linux Kernel Vir. Computing (Docker + Mesos Slave ) cgroup Namespaces Vir. Storage (Ceph) libvirt Vir. Networking (ODL, ONOS, OVS..) DPDK LXC ODP SRIOV Nf- Vi Internal API DC/OS (Mesos Master) Machines Phy. Computing Phy. Storage Phy. Networking Kernel features such as cgroup and namespaces achieve abstraction of physical resources Docker and Mesos achieve coordination of computing, memory, storage, networking resource from multiple machines (clustering) Ceph can be used to achieve RADOS (reliable and autonomic distributed object storage) Marathon s dashboard takes the role of UI and real-time monitoring

10 Container-based Open Source Solutions for NFV Framework Apache Mesos [Virtualization Layer + VIM] An open source implementation for clustering and managing abstracted physical or VM resources such as CPUs, RAMs, storages of machines (over VMs or bare metals) Master-slave architecture for native container-based VNFs Can be integrated with long-run management or orchestration software for better VIM and clustering capability (e.g. Marathon, Zookeeper, Docker Swarm) Apache Marathon [VNF Manager] Container orchestration platform for Mesos Provide VNF s HA, Service Discovery & Load Balancing VNF health check and event subscription Support CI/CD with DCOS Of course, the Open DC/OS platforms 10

11 Service Chaining Framework VNF#72 Service Models VNF#3 VNF#15 VNF#101 VNF#9 VNF#12 NFV Orchestrator VNFs VNF Managers Virtual OF Switches SDN Controller Virtual Processing Virtual Storage Virtual Network Interfaces Normal DPDK ODP SR-IOV Physical Environment

12 Use Case: Mobile Core over DC/OS with SDN Operator s Core Network Slices Zookeeper SDN Controller S-GW CP (master) P-GW CP Marathon MEN Manager Local Network HeNB HeNB HeNB HeNB OFSW Networks Internal DB Internal DB L-Serv#n Cassandra S-GW UP L-Serv#1 P-GW UP L-Serv#2 SeGW MongoDB HeMS Elasticsearch Config. Physical connections Host OS Computing/Storage/Network Infrastructure

13 Use Case: Mobile Core over DC/OS with SDN Host Machine MME/ HSS Physical Machines E-UTRAN GTPU SAE GW (S-GW & P-GW) S11/S5/S8 SGi Docker veth... Host Network Bridges (Internal) S11 GTPU veth... MME Docker openvswitch-switch Docker Weave Net Docker NB ovs-vsctl OpenDaylight veth... Docker SB Weave Scope Docker GW MME HSS PCRF IMS APPS Host Network Interfaces DPDK Physical: OpenFlow Switches Other Hosts E-UTRAN: Evolved Universal Terrestrial Radio Access Network MME: Mobility Management Entity HSS: Home Subscriber Server S-GW: Serving Gateway P-GW: Packet Data Network Gateway PCRF: Policy and Charging Rules Function IMS: IP Multimedia Subsystem 13

14 THANK YOU VERY MUCH 14