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

1. install multus-cni follow it's doc

2. 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