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Use kernel 5.10 #862

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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -78,7 +78,7 @@ templates in the same bucket under the path `s3://amazon-eks/1.10.3/2018-06-05/`

By default, the `amazon-eks-ami` uses a [source_ami_filter](https://github.com/awslabs/amazon-eks-ami/blob/e3f1b910f83ad1f27e68312e50474ea6059f052d/eks-worker-al2.json#L46) that selects the latest [hvm](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/virtualization_types.html) AL2 AMI for the given architecture as the base AMI. For more information on what kernel versions are running on published Amazon EKS optimized Linux AMIs, see [the public documentation](https://docs.aws.amazon.com/eks/latest/userguide/eks-linux-ami-versions.html).

When building an AMI, you can set the `kernel_version` to `4.14` or `5.4` to customize the kernel version. The [upgrade_kernel.sh script](https://github.com/awslabs/amazon-eks-ami/blob/master/scripts/upgrade_kernel.sh#L26) contains the logic for updating and upgrading the kernel. For Kubernetes versions 1.18 and below, it uses the `4.14` kernel if not set, and it will install the latest patches. For Kubernetes version 1.19 and above, it uses the `5.4` kernel if not set.
When building an AMI, you can set the `kernel_version` to `4.14`, `5.4` or `5.10` to customize the kernel version. The [upgrade_kernel.sh script](https://github.com/awslabs/amazon-eks-ami/blob/master/scripts/upgrade_kernel.sh#L26) contains the logic for updating and upgrading the kernel. For Kubernetes versions 1.18 and below, it uses the `4.14` kernel if not set, and it will install the latest patches. For Kubernetes version 1.19 and above, it uses the `5.4` kernel if not set. For Kubernetes version 1.22 and above, it uses the `5.10` kernel if not set.

## Security

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4 changes: 3 additions & 1 deletion scripts/upgrade_kernel.sh
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Expand Up @@ -16,8 +16,10 @@ if [[ -z "$KERNEL_VERSION" ]]; then

if (( ADDR[0] == 1 && ADDR[1] < 19 )); then
KERNEL_VERSION=4.14
else
elif (( ADDR[0] == 1 && ADDR[1] < 22 )); then
KERNEL_VERSION=5.4
else
KERNEL_VERSION=5.10
fi

echo "kernel_version is unset. Setting to $KERNEL_VERSION based on kubernetes_version $KUBERNETES_VERSION"
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