Amazon Elastic Kubernetes Services (EKS) upgrade guide

This topic describes how to upgrade Kubernetes in your Amazon Elastic Kubernetes Service (EKS) Domino deployment. EKS is hosted on Amazon Web Services (AWS).

Important

  • Immediately after the Kubernetes upgrade, you must upgrade Domino to a compatible version of Kubernetes. Domino will not work as expected until this is completed.

    For example, after upgrading Kubernetes to v1.22, you must upgrade to Domino v5.2 or later. Kubernetes v1.22 is not compatible with older versions of Domino. Similarly, after upgrading to Kubernetes 1.23 or 1.24, you must upgrade to Domino v5.3 or later.

  • The CDK automation at cdk-cf-eks has been deprecated. If you have infrastructure provisioned with CDK you will need to migrate to Terraform using the CDK to Terraform convert utility, before upgrading to Kubernetes 1.25.

Terraform

If you deployed your infrastructure using the terraform-aws-eks module version v3.0.1 or above, follow Upgrading K8s. Otherwise, there are 2 options:

  1. Upgrade the module to version v3 using State Migration, then follow Upgrading K8s.

  2. Follow the instructions below to perform the update with prior versions.

Review the prerequisites

To upgrade Kubernetes on a Terraform-provisioned cluster you must have the following files used/created during the cluster creation:

  • Terraform state file: terraform.tfstate

  • Variables file: domino-terraform.auto.tfvars

  • Terraform configuration file: main.tf

You’ll also need a Unix or Linux terminal with the following:

Update cluster and node_groups

  1. Set AWS credentials in the environment:

    export AWS_ACCESS_KEY_ID='_FILL_ME_IN_'
export AWS_SECRET_ACCESS_KEY='_FILL_ME_IN_'
export AWS_REGION='_FILL_ME_IN_'

  2. Validate that there are no pending changes:

    terraform plan

    The following message indicates no pending changes:

    No changes. Your infrastructure matches the configuration.

  3. Open the domino-terraform.auto.tfvars file and add/edit the k8s_version attribute with the desired Kubernetes version:

    k8s_version = '_FILL_ME_IN_'
    Note
    		 If you are using custom images for the node groups you will need to provide the appropriate Amazon Machine Image (AMI).

  4. Validate the desired changes:

    terraform plan -out=terraform.plan

  5. Update the cluster and node_groups:

    terraform apply terraform.plan

The upgrade takes some time as terraform apply performs these actions:

  • The control plane is upgraded to the desired version.

  • The latest amazon-eks-node version is retrieved and applied to the managed-node-groups. The update is detailed in Managed nodes update behavior.