ECS instance types of the ARM architecture - Elastic Container Instance

This topic describes how to specify Elastic Compute Service (ECS) instance types of the ARM architecture to create an Elastic Container Instance (ECI) pod. The pod runs on virtual nodes of the ARM architecture.

Supported instance type families

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

Category	ARM-based instance family
General-purpose instance families	g8y
Compute-optimized instance families	c8y
Memory-optimized instance families	r8y

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

Configurations

In addition to adding the k8s.aliyun.com/eci-use-specs annotation to the pod metadata to specify ECS instance types of the ARM architecture, you must set nodeSelector to kubernetes.io/arch: arm64 to adapt to Kubernetes-based scheduling.

Example:

Make sure that virtual nodes of the ARM architecture exist in the cluster.
```
kubectl get node
```
If the returned node name contains a linux-arm64 suffix, the node is a virtual node of the ARM architecture.
Note
For more information about how to add an ARM-based virtual node to a cluster, see Schedule pods to an ARM-based virtual node.

Run the following command to specify ECS instance types of the ARM architecture.

kubectl create -f arm-test.yaml

The following code provides an example in YAML format.

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" # Specify a maximum of five ECS instance types of the ARM architecture at a time. 
    spec:
      containers:
      - name: nginx
        image: arm64v8/centos:7.9.2009 # Use an ARM-based image. 
        command: ["sleep"]
        args: ["999999"]
      nodeSelector:
        kubernetes.io/arch: arm64 # Schedule to ARM-based virtual nodes.