Release v1.3.8

Rancher Kubernetes Engine (RKE) is a CNCF-certified Kubernetes distribution that runs entirely within Docker containers. It works on bare-metal and virtualized servers. With RKE, the installation and operation of Kubernetes are both simplified and easily automated, and they are entirely independent of the operating system and platform you’re running.

Enhancements

• Kubernetes v1.22 is no longer experimental and is now supported. Kubernetes v1.23 is experimental.

Major Bug Fixes

• CoreDNS Autoscaler now has a readiness and liveness check. See #24939.
• Fixed a regression such that options passed in cluster configuration for nginx configuration don't get passed to the new nginx ingress controller configmap. This is fixed with Kubernetes versions 1.19.16-rancher1-4, 1.20.15-rancher1-2, 1.21.9-rancher1-2. See #36851 for more information.
• Fixed an issue where rotateEncryptionKey resulted into a panic when creating cluster. See #36333.

Known Major Issues

• In clusters where cloud_provider is configured, and either address or internal_address does not contain a valid IP address (e.g. hostname or FQDN), kube-proxy will fail to start. See #1725.

Kubernetes Versions

Each version of RKE has a specific list of supported Kubernetes versions. If you want to use a different version than listed below, you will need to update Kubernetes using the system images option in your cluster.yml.

| Kubernetes version |
| --------------------- |
| v1.22.7-rancher1-1 |
| v1.21.10-rancher1-1 |
| v1.20.15-rancher1-2 |
| v1.19.16-rancher1-4 |
| v1.18.20-rancher1-3 |

| Experimental Kubernetes version |
| --------------------- |
| v1.23.4-rancher1-1 |

New Images in v1.23.4-rancher1, v1.22.7-rancher1, and v1.21.10-rancher1

Updated Hyperkube Image based on k8s versions

• rancher/hyperkube:v1.23.4-rancher1
• rancher/hyperkube:v1.22.7-rancher1
• rancher/hyperkube:v1.21.10-rancher1