//!!NODE_ROOT <chapter>

[.topic]
[#arm-support]
= ARM Support
:info_doctype: section

This topic covers how to create a cluster with an ARM node group, and how to add an ARM node group to an existing cluster. 

EKS supports 64-bit ARM architecture with its link:ec2/graviton/[Graviton processors,type="marketing"]. To create a cluster,
select one of the Graviton-based instance types (`a1`, `t4g`, `m6g`, `m7g`, `m6gd`, `c6g`, `c7g`, `c6gd`, `r6g`, `r7g`, `r6gd`, `m8g`, `r8g`, `c8g`) and run:

----
eksctl create cluster --node-type=a1.large
----

or use a config file:

----
---
apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
  name: cluster-arm-1
  region: us-west-2


nodeGroups:
  - name: ng-arm-1
    instanceType: m6g.medium
    desiredCapacity: 1
----

----
eksctl create cluster -f cluster-arm-1.yaml
----

ARM is also supported in managed nodegroups:

----
---
apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
  name: cluster-arm-2
  region: us-west-2

managedNodeGroups:
  - name: mng-arm-1
    instanceType: m6g.medium
    desiredCapacity: 1
----

----
eksctl create cluster -f cluster-arm-2.yaml
----

The AMI resolvers, `auto` and `auto-ssm`, will infer the correct AMI based on the ARM instance type. Only AmazonLinux2023, AmazonLinux2 and Bottlerocket families have EKS optimized AMIs for ARM.

[NOTE]
====
ARM is supported for clusters with version 1.15 and higher.
====