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1.23 version information and update actions

1.23 version information and update actions

This version is no longer supported. Update your cluster to a supported version as soon as possible.

Review information about version 1.23.

This badge indicates Kubernetes version 1.23 certification for IBM Cloud Kubernetes Service
Kubernetes version 1.23 certification badge

IBM Cloud Kubernetes Service is a Certified Kubernetes product for version 1.23 under the CNCF Kubernetes Software Conformance Certification program. Kubernetes® is a registered trademark of The Linux Foundation in the United States and other countries, and is used pursuant to a license from The Linux Foundation.

For more information about Kubernetes project version 1.23, see the Kubernetes change log

Release timeline

The following table includes the expected release timeline for version 1.23 of IBM Cloud® Kubernetes Service. You can use this information for planning purposes, such as to estimate the general time that the version might become unsupported.

Dates that are marked with a dagger () are tentative and subject to change.

Release timeline for IBM Cloud Kubernetes Service version 1.23
Version Supported? Release date Unsupported date
1.23 Yes 09 Feb 2022 08 May 2023

Preparing to update

This information summarizes updates that are likely to have and impact on deployed apps when you update a cluster to version 1.23. For a complete list of changes, review the community Kubernetes change log and IBM version change log for version 1.23. You can also review the Kubernetes helpful warnings.

Update before master

The following table shows the actions that you must take before you update the Kubernetes master.

Changes to make after you update the master to Kubernetes 1.23
Type Description
Unsupported: CoreDNS wildcard queries via Kubernetes plugin CoreDNS no longer supports wildcard DNS queries via the Kubernetes plugin. Applications using such queries must be updated to use an alternative DNS query method.
Kubernetes service IP advertisement over BGP If you are using Calico's Kubernetes Service IP Advertisement over BGP feature, you need to add the service IP CIDRs that you want to advertise to the default BGP configuration resource. In previous releases, the entire service IP range was advertised by setting an environment variable in the calico-node daemonset.

Update after master

The following table shows the actions that you must take after you update the Kubernetes master.

Changes to make after you update the master to Kubernetes 1.23
Type Description
Operator Lifecycle Manager (OLM) install no longer managed OLM is no longer installed nor managed by IBM. Existing installs are unchanged and no longer managed after the update. If you are using the OLM components then you must manage updates. If unused, you might uninstall the OLM components. Refer to the open source documentation for information on available resources including how to install a new instance of OLM on your cluster.
Recreate volume snapshots Volume snapshots must be recreated after the update. Run kubectl get volumesnapshots -A to get a list of volume snapshots.