Opennet

Motivation

Our product design requires Kubernetes to support unique IP address segments, such as public network IPs, and these unique IP address segments can only be bound to specified machines. We searched for many CNI plugins in the community, and did not find a suitable one, so we decided Develop new CNI plugin to meet our application scenarios.

Introduce

Opennet is an address assignment plugin developed based on Multus-cni

Features

IP segment management
IP binding to specific server
IP cluster level unified management
Support real-time IP configuration update, effective in real time
Support IP allocation query
IP statistics

How to

install multus-cni follow it's doc

install opennet

a. install daemonset

 kubectl apply -f components/deploy/daemonset-install.yaml

create etcd secret, please modify pem file name

 kubectl  -n kube-system create secret generic etcd-certs --from-file=/etc/etcd/ssl/etcd.pem --from-file=/etc/etcd/ssl/etcd-key.pem --from-file=/etc/etcd/ssl/etcd-root-ca.pem

b. configure CNI net configuration, save to cni.yaml

apiVersion: "k8s.cni.cncf.io/v1"
kind: NetworkAttachmentDefinition
metadata:
  name: opennet-demo
  namespace: kube-system
spec:
  config: '{
    "cniVersion": "0.3.1",
    "name": "opennet-demo",
    "type": "macvlan",
    "master": "eno1",
    "mode": "vepa",
    "ipam": {
    "type": "opennet",
    "range": [
       {
          "subnet":"192.168.188.0/26",
          "start":"192.168.188.151",
          "end":"192.168.188.181",
          "gw":"192.168.188.190",
          "dev":"80197"
       },
       {
          "subnet":"192.168.188.0/26",
          "start":"192.168.188.182",
          "end":"192.168.188.186",
          "gw":"192.168.188.190",
          "dev":"80366"
       }
     ],
    "dns":{
      "nameserver":[
        "8.8.8.8",
        "8.8.4.4"
      ]
 }
 }
}'

kubectl -n kube-system apply -f cni.yaml

c. configure every device number into /etc/cni/net.d/opennet-devno

if every IP segment fit all machine, then can set the opennet-devno as the same device number.

d. example, save to test.yaml

apiVersion: v1
kind: Pod
metadata:
  annotations:
    v1.multus-cni.io/default-network: kube-system/opennet-demo
  name: test-tools
  labels:
    name: myapp
spec:
  containers:
    - name: myapp
      image: alpine:latest
      command:
        - /bin/sleep
        - 1d

kubectl apply test.yaml

Contributor

Waiting for additional instructions

Thanks

Thanks to the multus-cni team for developing such an excellent network plugin

Support

If you need help, please file an issue, we will answer or satisfy in the first time

Ankr-network / opennet