12.8.2. 为多播配置 SR-IOV 接口

流程

1. 创建一个 SriovNetworkNodePolicy 对象：

   apiVersion: sriovnetwork.openshift.io/v1
   kind: SriovNetworkNodePolicy
   metadata:
     name: policy-example
     namespace: openshift-sriov-network-operator
   spec:
     resourceName: example
     nodeSelector:
       feature.node.kubernetes.io/network-sriov.capable: "true"
     numVfs: 4
     nicSelector:
       vendor: "8086"
       pfNames: ['ens803f0']
       rootDevices: ['0000:86:00.0']

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2. 创建一个 SriovNetwork 对象：

   apiVersion: sriovnetwork.openshift.io/v1
   kind: SriovNetwork
   metadata:
     name: net-example
     namespace: openshift-sriov-network-operator
   spec:
     networkNamespace: default
     ipam: | 

   1

   
       {
         "type": "host-local", 

   2

   
         "subnet": "10.56.217.0/24",
         "rangeStart": "10.56.217.171",
         "rangeEnd": "10.56.217.181",
         "routes": [
           {"dst": "224.0.0.0/5"},
           {"dst": "232.0.0.0/5"}
         ],
         "gateway": "10.56.217.1"
       }
     resourceName: example

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   1 2

   如果选择将 DHCP 配置为 IPAM，请确保通过 DHCP 服务器提供了以下默认路由： 224.0.0.0/5 和 232.0.0.0/5。这会覆盖由默认网络供应商设置的静态多播路由。

3. 创建带有多播应用程序的 pod:

   apiVersion: v1
   kind: Pod
   metadata:
     name: testpmd
     namespace: default
     annotations:
       k8s.v1.cni.cncf.io/networks: nic1
   spec:
     containers:
     - name: example
       image: rhel7:latest
       securityContext:
         capabilities:
           add: ["NET_ADMIN"] 

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       command: [ "sleep", "infinity"]

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   1

   只有在应用程序需要为 SR-IOV 接口分配多播 IP 地址时，才需要 NET_ADMIN 功能。否则，可以省略它。