Release notes for kOps 1.27 series

Significant changes

The default image has been updated to Ubuntu 22.04 (Jammy).
The default retention duration for the etcd backups is now set to 90 days. This behaviour can be overridden by setting spec.etcdClusters[*].manager.backupRetentionDays in the cluster spec.
external-dns is now supported in IPv6 clusters.
Using swap memory is now possible by setting spec.kubelet.memorySwapBehavior.

As of Kubernetes version 1.27, all nodes will default to running with instance-metadata-service tokens required, with a max hop limit of 1. Newly created clusters will be configured as necessary to have these settings.
As of Kubernetes version 1.27, credentials for private ECR repositories will be handled by the out-of-tree credential provider. This is an additional binary that each instance downloads from the assets repository.
Karpenter has been upgraded to version 0.27.x and the feature flag is no longer necessary.

Nodes will now assign floating IPs when they are in a subnet that is of type Public. Previously they would do so when the respective topology was set to public.

Support for Kubernetes version 1.22 is deprecated and will be removed in kOps 1.28.
Support for Kubernetes version 1.23 is deprecated and will be removed in kOps 1.29.
Support for Ubuntu 18.04 is deprecated and will be removed in kOps 1.28.
Canal, Flannel, and Kube-Router are deprecated and support will be removed for Kubernetes 1.28 and later.
Support for AWS Classic Load Balancer for API is deprecated and should not be used for newly created clusters.
All legacy addons are deprecated in favor of managed addons, including the metrics server addon and the autoscaler addon.