Specifying a Subnet for a Pod

Scenarios

If the pod network contains multiple subnets, you can use the yangtse.io/subnets annotation to specify the subnets after a pod is created.

Constraints

A maximum of 20 subnets can be specified for a pod.
The subnets specified for a pod must be included in the pod network configuration.
Multiple subnets are separated using commas (,).
There must be idle IP addresses in each subnet, or the pod fail to be created due to insufficient IP addresses.

Using ccictl

You can add annotations to a workload to specify the subnets for each pod.

apiVersion: cci/v2
kind: Deployment
metadata:
  annotations:
    description: ''
  labels: {}
  name: nginx
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      annotations:
        vm.cci.io/pod-size-specs: 2.00_4.0
        resource.cci.io/pod-size-specs: 2.00_4.0
        metrics.alpha.kubernetes.io/custom-endpoints: '[{api:'''',path:'''',port:'''',names:''''}]'
        yangtse.io/subnets: ${subnetID1},${subnetID2}    # Subnets specified for the pod
        log.stdoutcollection.kubernetes.io: '{"collectionContainers": ["container-0"]}'
      labels:
        app: nginx
    spec:
      containers:
        - image: library/nginx:stable-alpine-perl
          name: container-0
          resources:
            limits:
              cpu: 2000m
              memory: 4096Mi
            requests:
              cpu: 2000m
              memory: 4096Mi
          command: []
          lifecycle: {}
      dnsPolicy: ''
      imagePullSecrets:
        - name: imagepull-secret
      dnsConfig: {}
  minReadySeconds: 0
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 0
      maxUnavailable: 1