Binding a Security Group to a Pod Using an Annotation

Application Scenarios

In Cloud Native 2.0 network mode, pods use ENIs or sub-ENIs of the VPC. You can configure a security group for a pod using a pod's annotation.

Configure a security group in either of the following cases:

• To newly bind a security group to a pod, use annotation yangtse.io/security-group-ids.
• To bind more security groups to a pod, use annotation yangtse.io/additional-security-group-ids.

The priority of the security group bound to a pod using annotation yangtse.io/security-group-ids is higher than those of the security groups in the security group policy (SecurityGroup) and cluster container network configuration (NetworkAttachmentDefinition).

Prerequisites

Using kubectl

• Create a workload with a security group configured. The security group bound to the pod is subject to the one configured using an annotation.
  

  If the pod has been bound to a security group, the configuration will be overwritten.

  apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: nginx
  spec:
    replicas: 3
    selector:
      matchLabels:
        app: nginx
    template:
      metadata:
        labels:
          app: nginx
        annotations:
          yangtse.io/security-group-ids: *****  # Security group ID. Use commas (,) to separate multiple security groups.
      spec:
        containers:
          - name: container-0
            image: nginx:alpine
            resources:
              limits:
                cpu: 100m
                memory: 200Mi
              requests:
                cpu: 100m
                memory: 200Mi
        imagePullSecrets:
          - name: default-secret

• Add an additional security group for the workload.

  apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: nginx
  spec:
    replicas: 3
    selector:
      matchLabels:
        app: nginx
    template:
      metadata:
        labels:
          app: nginx
        annotations:
          yangtse.io/additional-security-group-ids: *****  # Security group ID. Use commas (,) to separate multiple security groups.
      spec:
        containers:
          - name: container-0
            image: nginx:alpine
            resources:
              limits:
                cpu: 100m
                memory: 200Mi
              requests:
                cpu: 100m
                memory: 200Mi
        imagePullSecrets:
          - name: default-secret