You may not be able to add Arm64 instance types to a custom virtual node group. This usually happens when the AMI doesn’t support Arm64 or when the cluster has a whitelist or blacklist that excludes these instance types. This article explains why this happens and how to fix it.
- Check if the AMI supports Arm64.
- If the virtual node group's AMI doesn’t support Arm64, you won’t be able to select Arm64 instance types.
- Add an AMI that supports Arm64 to the virtual node group.
- After updating the AMI, select the Arm64 instance types in the virtual node group settings.
- Check the cluster configuration for a whitelist or blacklist.
- If the cluster uses a whitelist, make sure Arm64 instance types are included.
- If the cluster uses a blacklist, remove the Arm64 instance types from the blacklist.
- After updating the cluster configuration, add the required Arm64 instance types to the virtual node group.
After updating the AMI or adjusting the whitelist/blacklist in the cluster configuration, you can add Arm64 instance types to the virtual node group.
AWS provides specific documentation that explains how to determine whether an AMI supports Arm64. The key reference is the AWS EC2 User Guide section on AMI architecture, which states that each AMI defines the architectures it supports, such as arm64 or x86_64.
Here are the most helpful AWS sources:
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