Arm-based ECS instance types - Elastic Container Instance

This topic shows you how to create an ECI pod for the Arm architecture by specifying an ECS Arm instance type. The pod runs on a virtual node based on the Arm architecture.

Prerequisites

You have created an Arm-based virtual node in your cluster. For more information, see Add an Arm-based virtual node.

Instance types

Arm-based instance types are built on the Arm architecture. Each vCPU corresponds to a physical processor core. They deliver stable performance and provide exclusive resources. They are suitable for scenarios such as containers, microservices, websites and application servers, high-performance computing (HPC), and CPU-based machine learning.

Category	Arm instance family
General-purpose	g8y
Compute-optimized	c8y
Memory-optimized	r8y

For more information about ECS instance types, see the following topics:

Configuration

To create a pod using an Arm instance type, you must add the k8s.aliyun.com/eci-use-specs annotation to the pod's metadata to specify the instance type and set the nodeSelector to kubernetes.io/arch: arm64 to schedule the pod to a node with the Arm architecture.

The following steps show how to configure the pod.

Verify that an Arm-based virtual node exists in the cluster.

kubectl get node

If the output includes a node name ending with the linux-arm64 suffix, that node is an Arm-based virtual node.

:~$ kubectl get node
NAME                                       STATUS   ROLES   AGE    VERSION
virtual-kubelet-cn-beijing-h               Ready    agent   169m   v1.24.6-aliyun.1
virtual-kubelet-cn-beijing-i               Ready    agent   169m   v1.24.6-aliyun.1
virtual-kubelet-cn-beijing-i-linux-arm64   Ready    agent   75s    v1.24.6-aliyun.1
virtual-kubelet-cn-beijing-k               Ready    agent   169m   v1.24.6-aliyun.1

Note

To learn how to create an Arm-based virtual node, see Add an Arm-based virtual node.

Create a pod and specify an Arm instance type.

kubectl create -f arm-test.yaml

The following is an example arm-test.yaml file:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: test
  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-use-specs: "ecs.c8y.large,ecs.g8y.large"   # Specifies the ECS Arm instance types. You can list up to five.
    spec:
      containers:
      - name: nginx
        image: arm64v8/centos:7.9.2009   # An image built for the Arm architecture.
        command: ["sleep"]
        args: ["999999"]
      nodeSelector:
        kubernetes.io/arch: arm64  # Schedules the pod to a node with the Arm architecture.