CNI-DRA-Driver Scheduling Idea.md

---
apiVersion: resource.k8s.io/v1beta1
kind: ResourceSlice
metadata:
  name: kind-worker-network-interfaces
spec:
  devices:
  - name: eth0
    basic:
      attributes:
        name:
          string: "eth0"
        capabilities:
          string: ["macvlan", "vlan"]
      capacities:
      - name: "vlan"
        slice: []
  nodeName: kind-worker
  driver: cni.dra.networking.x-k8s.io
---
apiVersion: resource.k8s.io/v1beta1
kind: ResourceSlice
metadata:
  name: kind-worker-whereabouts-subnets
spec:
  devices:
  - name: "10.10.1.0/24"
    basic:
      attributes:
        subnet:
          string: "10.10.1.0/24"
      capacities:
      - name: "ips"
        count: 250
  - name: "10.10.2.0/24"
    basic:
      attributes:
        subnet:
          string: "10.10.2.0/24"
      capacities:
      - name: "ips"
        count: 250
  nodeName: kind-worker
  driver: cni.dra.networking.x-k8s.io # Used by the driver but not created nor maintained by the driver (created and maintained by whereabouts).
---
apiVersion: resource.k8s.io/v1beta1
kind: ResourceClaim
metadata:
  name: vlan-eth0-300-attachment
spec:
  devices:
    requests:
    - name: vlan-eth0-300
      deviceClassName: cni.networking.x-k8s.io
      consumption: 
      - selector: # This will select and consume in the device "eth0" of the resourceSlice called kind-worker-network-interfaces
        - cel:
            expression: | # Selects the resource with an interface named eth0 with vlan capability (for it to be selected, the capacity must be available)
              device.attributes["cni.dra.networking.x-k8s.io"].name == "eth0" &&
              device.attributes["cni.dra.networking.x-k8s.io"].capabilities.has("vlan")
          capacity:
            'vlan': "300" # consume its vlan 300
      - selector: # This will select and consume in the device "10.10.1.0/24" of the resourceSlice called kind-worker-whereabouts-subnets
        - cel:
            expression: | # Selects the resource that offers the subnet 10.10.1.0/24
              device.attributes["whereabouts.k8s.cni.cncf.io"].subnet == "10.10.1.0/24"
          capacity:
            'ips': 2 # consume 2 IPs on the subnet 10.10.1.0/24
      - selector: # This will select and consume in the device "10.10.2.0/24" of the resourceSlice called kind-worker-whereabouts-subnets
        - cel:
            expression: | # Selects the resource that offers the subnet 10.10.2.0/24
              device.attributes["whereabouts.k8s.cni.cncf.io"].subnet == "10.10.2.0/24"
          capacity:
            'ips': 1 # consume 2 IPs on the subnet 10.10.2.0/24
    config:
    - requests:
      - vlan-eth0-300
      opaque:
        driver: cni.dra.networking.x-k8s.io
        parameters:
          apiVersion: cni.networking.x-k8s.io/v1alpha1
          kind: CNI
          ifName: "net1"
          config: # CNI Config requesting a VLAN interface with the VLAN ID 300 and IPAM using Whereabouts for 3 IPs in 2 different subnets.
            cniVersion: 1.0.0
            type: vlan
            name: vlan-eth0-300
            master: eth0
            vlanId: 300
            linkInContainer: false
            ipam:
              type: whereabouts
              ipRanges:
              - range: 10.10.1.0/24
              - range: 10.10.1.0/24
              - range: 10.10.2.0/24
---
apiVersion: v1
kind: Pod
metadata:
  name: demo-a
spec:
  containers:
  - name: alpine
    image: alpine:latest
    imagePullPolicy: IfNotPresent
    command:
    - sleep
    - infinity
  resourceClaims:
  - name: vlan-eth0-300-attachment
    resourceClaimName: vlan-eth0-300-attachment