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diff --git a/docs/arm/data_plane_dpdk_deployment.rst b/docs/arm/data_plane_dpdk_deployment.rst new file mode 100644 index 0000000..1f6317c --- /dev/null +++ b/docs/arm/data_plane_dpdk_deployment.rst @@ -0,0 +1,181 @@ +.. This work is licensed under a Creative Commons Attribution 4.0 International +.. License. +.. http://creativecommons.org/licenses/by/4.0 +.. (c) OPNFV, Arm Limited. + + + +============================================================= +Kubernetes Pods with DPDK Acceration Deployment on Arm Server +============================================================= + +Abstract +======== + +This document gives a brief introduction on how to deploy Pods with DPDK acceration for data plane. + +Introduction +============ +.. _kubeadm: https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/ +.. _dpdk: http://dpdk.org + +As we know, in some cases we need to deploy Pods with data-plane acceration. +Typically, in production area(5G, Edge computing), +one interface we used for control plane, it usually will be flannel. +For data plane, sriov cni + DPDK has the best throughput and the lowest lantency. +In this case, I will introduce Pod with DPDK acceration firstly. + +NIC with SR-IOV capabilities works by introducing the idea of physical functions (PFs) +and virtual functions (VFs). +In general, PF is used by host. +Each VFs can be treated as a separate physical NIC and assigned to one container, +and configured with separate MAC, VLAN and IP, etc. +If we want the best networking performance for Pods, this should be the best solution. + +DPDK is a set of libraries and drivers for fast packet processing. +It is designed to run on any processors. +DPDK can greatly boosts packet processing performance and throughput, +allowing more time for data plane applications. +Also it can improve packet processing performance by up to ten times. + +For demo purpose, I suggest that we use Kubeadm to deploy a Kubernetes cluster firstly. +Then I will give out a typical deployment scenario. + +Basic Information about Environment +=================================== + +Cluster Info + +In this case, we deploy master and slave as one node. +Suppose it to be: 192.168.1.2 + +In 192.168.1.2, 2 NIC as required. +Suppose it to be: eth0, eth1, eth0 is used to be controle plane, and eth1 is used to be data plane. +Also eth1 should support SRIOV. + +Deploy Kubernetes +----------------- +Please see link(https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/) as reference. + +SRIOV Configuration +------------------- +Please make sure SRIOV VF mode was enabled in your host. + +:: + For example + rmmod ixgb + modprobe ixgbe max_vfs=8 + +VFIO and IOMMU Configuration +---------------------------- +Please make sure the required pcie devices were binded into vfio-pci. +And IOMMU was optional on Arm64 platform + + +:: + With driverctl: + + # driverctl -v list-devices | grep -i net + # driverctl set-override <pci-slot> vfio-pci + + With dpdk_nic_bind (DPDK <= 16.04): + + # modprobe vfio-pci + # dpdk_nic_bind --status + # dpdk_nic_bind --bind=vfio-pci <pci-slot> + + With dpdk-devbind (DPDK >= 16.07: + + # modprobe vfio-pci + # dpdk-devbind --status + # dpdk-devbind --bind=vfio-pci <pci-slot> + +:: + Enable IOMMU + + # IOMMU was enabled as default on Arm64 platform + + Disable IOMMU + + # echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode + +Hugepage Configuration +---------------------- +Please make sure hugepage was enabled in your host. + +:: + For example: + mount -t hugetlbfs nodev /mnt/huge + echo 4096 > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages + +Configuring Pod with Control Plane and Data Plane with DPDK Acceration +====================================================================== + +1, Save the below following YAML to dpdk.yaml. + +:: + apiVersion: v1 + kind: Pod + metadata: + name: dpdk + spec: + nodeSelector: + beta.kubernetes.io/arch: arm64 + containers: + - name: dpdk + image: younglook/dpdk:arm64 + command: [ "bash", "-c", "/usr/bin/l2fwd --huge-unlink -l 6-7 -n 4 --file-prefix=container -- -p 3" ] + stdin: true + tty: true + securityContext: + privileged: true + volumeMounts: + - mountPath: /dev/vfio + name: vfio + - mountPath: /mnt/huge + name: huge + volumes: + - name: vfio + hostPath: + path: /dev/vfio + - name: huge + hostPath: + path: /mnt/huge + +2, Create Pod + +:: + command: + kubectl create -f dpdk.yaml + +3, Get the details of the running pod from the master + +:: + # kubectl get pods + NAME READY STATUS RESTARTS AGE + dpdk 1/1 Running 0 30s + +Verifying DPDK Demo Application +=============================== + +:: + # kubectl logs dpdk + Port statistics ==================================== + Statistics for port 0 ------------------------------ + Packets sent: 7743 + Packets received: 675351868 + Packets dropped: 675229528 + Statistics for port 1 ------------------------------ + Packets sent: 6207 + Packets received: 675240108 + Packets dropped: 675345661 + Aggregate statistics =============================== + Total packets sent: 13950 + Total packets received: 1350594777 + Total packets dropped: 1350577990 + ==================================================== + +Contacts +======== + +Bin Lu: bin.lu@arm.com |