Container Service for Kubernetes:(In invitational preview) Schedule pods to run on Windows virtual nodes

Considerations

Before you begin, be aware of the following:

• Windows-based ECI pods require at least 2 vCPUs and 4 GiB of memory. GPU-accelerated instances, instances with local disks, and ARM-based instances are not supported.

• The Windows container image version must be 10.0.20348.\* (Windows Server 2022).

Prerequisites

Before you begin, ensure that you have:

• Virtual Kubelet v2.11.0-rc.0 or later installed in the cluster. Virtual Kubelet is the ACK Virtual Node component. For more information, see Manage components and ACK Virtual Node

Add a Windows virtual node

Enable the Windows virtual node by setting enableWindowsAmd64Node to "true" in the eci-profile ConfigMap.

1. Edit the eci-profile ConfigMap:

   kubectl edit -n kube-system cm/eci-profile

2. In the data section, set enableWindowsAmd64Node to "true":

   data:
     ......
     enableWindowsAmd64Node: "true"   # Enable the Windows virtual node.
     ......

3. Verify that the Windows virtual node was created:

   kubectl get nodes -l kubernetes.io/os=windows

   The expected output is similar to:

   

   Windows virtual nodes are automatically generated in the cluster.

Create a Windows-based pod

Windows virtual nodes carry the label "kubernetes.io/os": windows. Use nodeSelector in your pod spec to schedule an ECI-based pod to a Windows virtual node.

The following Deployment example uses nodeSelector to target a Windows virtual node and runs a Windows container image:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: test-windows
  labels:
    app: test
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      name: nginx-test
      labels:
        app: nginx
        alibabacloud.com/eci: "true"
      annotations:
        k8s.aliyun.com/eci-with-eip: "true"              # Associate an EIP (Elastic IP address) with the pod to pull images over the Internet.
        k8s.aliyun.com/eci-use-specs: "ecs.c6.4xlarge"   # Specify an ECS instance type to create the pod.
    spec:
      containers:
      - name: test
        image: mcr.microsoft.com/windows/nanoserver:ltsc2022   # Use a Windows Server 2022 container image.
        command: ["ping","-t","localhost"]
      nodeSelector:
        kubernetes.io/os: windows   # Schedule the pod to run on the Windows virtual node.