Upgrade the Kubernetes Version
Learn how to upgrade the Kubernetes version of the cluster and the node pools in your Oracle WebLogic Server for OKE stack.
Note:
You can upgrade the cluster and node pool only for Oracle WebLogic Server for OKE instances created from June 2022 (release 22.2.3).For an Oracle WebLogic Server for OKE stack created with an older Kubernetes version, Oracle recommends you upgrade the Kubernetes cluster and the node pool to new Kubernetes version that is supported by Oracle Container Engine for Kubernetes. The current Kubernetes version supported for Oracle WebLogic Server for OKE is 1.28.2. To know the Kubernetes versions, see Currently Supported Kubernetes Versions in the Oracle Cloud Infrastructure documentation.
If your Kubernetes cluster and the node pool is three minor versions behind the current supported version, you must upgrade the cluster to at least one minor version higher than the existing cluster version. However, you can either continue to use the node pool running the older version of Kubernetes or upgrade the node pool version also to the Kubernetes cluster version.
Note:
The older node pool version must be compatible with the Kubernetes cluster version.Note:
If your Kubernetes cluster and node pool version is 1.21 or lower, after you upgrade the cluster and node pool to version 1.28, you must upgrade the nginx-ingress image to 1.3.1 version and then reinstall the ingress-controllers. See Upgrade the NGINX Image Version.