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Flexible, Software-Defined Networking Infrastructure Flexible, software-defined networking infrastructure Red Hat Enterprise Linux enabling the clouds Clouds Need Red Hat Enterprise Linux Rashid Khan Russell Bryant Networking Services Office of Technology Wednesday, May 03, 2017 #redhat #rhsummit OS Matters Red Hat Enterprise Linux Enables, Empowers, Excels, Enterprise Cloud Red Hat Enterprise Linux (RHEL) #redhat #rhsummit OS Matters ! Core operating system needs support ● Evaluation of patches regarding stability and ● Dedicated to RHEL impact (Hardening) ○ ~700 Developers ● Single point of support (no tennis match of bugs) ○ ~ 400 QA ● Minimizes downtime with balance of stability and security (CVE) ● In addition ○ Layered products Guarantee of API and ABI ■ Developers ● Applications will work after minor upgrades ■ QA ● 3rd party kernel modules under kabi program will ○ Support Services continue work ○ ~14,000 people ready to ● Synchronization of user space with kernel ensure your success features ○ ● Somethings like HW Integration with layered products, and Ansible, and a acceleration cannot be done whole portfolio of products without the OS! #redhat #rhsummit Network Security, Isolation, Tunnels Security and Isolation For Multi-tenancy, Fairness, Enterprise readiness ● Robust Firewalling ○ Connection Tracking with NAT in OVS ○ NetFilter ● Network Namespaces ● L2 Security via MACsec ● L3 Security via IPsec #redhat #rhsummit Tunnels and Isolation ● VLANs (limited identifiers) ● VXLAN with HW offload with IPv6 also ● Geneve (more flexible) ● QinQ 802.1ad (great results) C C C C C V C V M V V V V M M M M M Vxlan Red Hat Red Hat Geneve Enterprise Enterprise QinQ Linux (RHEL) Linux (RHEL) #redhat #rhsummit Packets to/from Virtual Machines Kernel Networking DPDK+vhost-user Device Assignment U Vm-1 Vm-2 Vm-n Vm-1 Vm-2 Vm-n Vm-1 Vm-2 Vm-n S E Vhost-USER / QEMU R vhost -net / QEMU D D D s i i i Open vswitch Open vswitch SR-IOV p r r r a e e e c DPDK c c c e PMD t t t Driver K e Kernel Networking Kernel Kernel r Networking Networking Device Driver n e l IP IP IP Cloud s Cloud Cloud p a c e #redhat #rhsummit Ready for NFV and Enterprise Vm-1 Vm-2 Vm-n ● Fully integrated with Vhost-USER / QEMU ○ Red Hat Openstack Platform ○ Red Hat Virtualization Open vswitch Zero packet loss absolutely possible! ● Full support with Frame Mpps Gbps Mpps/core Mpps ○ Network Namespaces size @0.002% @0.002% @0.002% @0% ○ VXLAN loss loss loss loss ○ Geneve 64 22.93 15.41 5.73 13.46 DPDK ○ Conntrack ○ NAT ○ MQ ○ CPU Pinning NIC ○ Kernel-DP / DPDK on Host DPDK NOT “experimental” anymore ○ DPDK inside the Guest Intel 82599 NIC Max ~23Mpps ○ Optimized for 10G ○ Tuning #redhat #rhsummit CPUs are needed for SW solutions What about 25G? 40G? 50G? Is it game over? #redhat #rhsummit OVS HW offload emerging as an answer Red Hat working with ● Mellanox ● Netronome ● Cavium ● Chelsio ● Others RH Value add ● Open Source upstream solution (Must) ● Integrated solution with layered products (Must) ● Unified / Common API for Kernel and DPDK (Goal) ● No Vendor lock-in (Goal) #redhat #rhsummit HW partner A ● Initial results look very promising ● Fully integrated solution with layered products achievable ● Physical-to-Virtual-to-Physical in this test #redhat #rhsummit HW partner A ● Crawl, Walk, Run ● Huge Potential Of Success ● Physical-to-Virtual-to-Physical ● RHEL is a must for success #redhat #rhsummit HW partner B ● Initial results look very promising ● Fully integrated solution with layered products achievable ● Physical-to-Virtual-to-Physical #redhat #rhsummit HW partner B ● Crawl, Walk, Run ● Huge Potential Of Success ● Physical-to-Virtual-to-Physical ● RHEL is a must for success #redhat #rhsummit Containers Networking (BTW Containers are Linux!) Container Versus VM Networking Packet Flow DPDK Accelerated NIC Open vSwitch Userspace vhost-user container container VM VM App App OS OS executing executing App App Networking Networking Stack Stack Kernel Open vSwitch NIC Performance #redhat #rhsummit Containers: DPDK or not DPDK? Packet Flow DPDK Accelerated NIC Open vSwitch Userspace container container container container App App App App Networking Networking Networking Networking Stack Stack Stack Stack Kernel Open vSwitch Additional Context Switches NIC Performance #redhat #rhsummit Container Networking App Container Container Container App App App App Private Network Container Container Container Container Namespace Open vSwitch veth Private Net Node 2 Private Net Private Net Private Net Namespace Namespace Namespace Namespace NIC veth Open vSwitch/Bridge Container Container SRIO-V Host Network Namespace Open vSwitch or Linux Bridge Open vSwitch Node 3 Node 1 NIC IP cloud ● Namespaces provide private network stacks inside each container ● Kernel enforces privacy without need for heavy-weight virtualization ● Standard kernel network interfaces, iptables, routing, OVS, can all be used #redhat #rhsummit Containers for NFV Containers NFV (Needs / Requests) ● Multiple networks (SDN, physical, SAN, etc) ● Physical NICs and SR-IOV (DPDK inside container) ● Flexible IP addressing and overlapping IP networks (multi-tenancy) ● Flat architecture for line-rate processing and low latency ● NUMA and CPU affinity of containerized VFs ● Coordinating widely separated premises ● IPv6 support and availability, especially in public cloud ● Provide existing orchestration and optional micro-service features #redhat #rhsummit Container NFV Proof-of-Concept Using OpenShift vCPE Operator Datacenter Server GPON NID Demarc Point Management VF Container VF VF Container Container Service Function Chains NIC NIC NIC Customer Metro/GPON Already Done! Under investigation: ● Static IPv6 addressing ● Overlapping IP networks ● Service Function Chains ● NUMA/CPU affinity ● Flexible IP addressing ● IPv6 SLAAC addressing ● No bridging or SDN in packet fast-paths ● Dynamic Service Function ● Multiple interfaces per container (NIC, VLAN, SDN) Chains/NSH #redhat #rhsummit ● Robust SRIO-V OVN / SDN Virtual Networking ● Decouple logical network topology from physical network A B D E HV1 HV2 S S A B C F C R S S S D E G H F G H Logical Network Topology Cloud Physical Network #redhat #rhsummit Open Virtual Network (OVN) ● Provide common virtual networking implementation as a part of the base platform (RHEL) ● Comes with OVS and introduces no new dependencies ● Use lessons learned from previous OVS based virtual networking implementations ● Started upstream in 2015 and has now matured #redhat #rhsummit Context - OpenStack Services API and common services Backend specific orchestration Backend specific host technology #redhat #rhsummit Context - OpenStack Neutron REST API neutron-server Orchestration layer ML2/OVS driver (Translate Neutron config into configuration of a network across a Neutron agents deployment) (OVS, L3, DHCP, Metadata) Per-host programmable virtual switch Open vSwitch programmed by the orchestration layer #redhat #rhsummit Context - OpenStack Neutron with OVN neutron-server neutron-server ML2/OVS driver ML2/OVN driver Neutron agents OVN services (OVS, L3, DHCP, Metadata) (ovn-northd, ovn-controller, OVN DBs) Open vSwitch Open vSwitch #redhat #rhsummit OVN - Virtual Networking Across Products OpenStack OpenShift RHV neutron-server (Kubernetes) (oVirt) THANK YOU OVN CNI plugin + kubernetes ML2/OVN driver OVN network provider resource watcher OVNplus.google.com/+RedHat services facebook.com/redhatinc OVN services OVN services (ovn-northd, ovn-controller, (ovn-northd, ovn-controller, (ovn-northd, ovn-controller, OVNlinkedin.com/company/red-hat DBs) twitter.com/RedHatNews OVN DBs) OVN DBs) youtube.com/user/RedHatVideos Open vSwitch Open vSwitch Open vSwitch #redhat #rhsummit OVN Architecture #redhat #rhsummit 1) Logical Configure in Northbound Database Neutron with networking-ovn OVN Northbound DB #redhat #rhsummit 2) ovn-northd Populates Southbound Database Neutron with networking-ovn OVN Northbound DB ovn-northd OVN Southbound DB #redhat #rhsummit 3) ovn-controller Generates Physical Flows Neutron with networking-ovn OVN Northbound DB ovn-northd OVN Southbound DB ovn-controller ovn-controller ovn-controller OVS OVS ... OVS #redhat #rhsummit Thank You! Questions? Backup Differences Kernel Networking DPDK + Vhost-user Device Assignment Pros Pros Pros ● Feature Rich / Robust solution ● Packets directly sent to user ● Line rate performance ● Ultra Flexible space ● Packets directly sent to VMs ● Integration with SDN ● Line rate performance with tiny ● HW based isolation ● Integration with OVS packets ● Supports Live Migration ● Integration with OVS Cons ● Supports Overlay Networking ● Limited number of VMs ● Full Isolation support / Cons ● Not as flexible Namespace / Multi-tenancy ● Everything has to be in user ● Less control from the host space ● No OVS Cons ● No SDN ● Non line rate performance for ● No live Migration of VMs tiny packets ● No Overlay #redhat #rhsummit #redhat #rhsummit.
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