Networking Plugin
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One of the requirements for VNF's is to support multiple virtual network interfaces and multiple IP addresses. Multus acts as a Multi plugin in Kubernetes and provides the multiple network interface support in a pod. https://github.com/intel/multus-cni. It'll be used in this project to provide a default management port based on Flannel to all VNF's. The other interfaces will all be based on ovn-kubernetes as discussed in the next section.
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Create following network resource for OVN.
OVN network resources in Kubernetes:
apiVersion: "kubernetes.cni.cncf.io/v1"
kind: Network
metadata:
name: ovn-network
spec:
config: '{
"name": "ovn-kubernetes",
"type": "ovn-k8s-cni-overlay"
}'
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For example: ovnIfaceList=[{"ip_address":"172.16.25.3", "mac_address":"0a:00:00:00:00:24", "gateway_ip": "172.16.25.1"}, {"ip_address":"172.16.26.3", "mac_address":"0a:00:00:00:00:15", "gateway_ip": "172.16.26.1"}]
Pod Specification with Multus and multiple interface support in OVN. The pod created has eth0 interface configured by flannel and one interface net1 on "ovn-ls-24" network:
apiVersion: v1
kind: Pod
metadata:
name: pod-ovn
annotations:
kubernetes.v1.cni.cncf.io/networks: '[ { "name": "ovn-network"}]'
ovnNetwork: '[
{ "name": "ovn-ls-24", "interface": "net1", "ipAddress": "172.16.24.55", "macAddress": "0A:00:00:00:00:4E" }]'
spec: # specification of the pod's contents
containers:
- name: pod-ovn
image: "busybox"
command: ["top"]
stdin: true
tty: true