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.. 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.
::
.. code-block:: 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
|
