cs_versions_123.md

copyright	lastupdated	keywords	subcollection
years 2014, 2024	2024-06-20	kubernetes, 1.23, versions, update, upgrade	containers

{{site.data.keyword.attribute-definition-list}}

1.23 version information and update actions

{: #cs_versions_123}

This version is no longer supported. Update your cluster to a supported version as soon as possible. {: important}

Review information about version 1.23. {: shortdesc}

{: caption="Figure 1. Kubernetes version 1.23 certification badge" caption-side="bottom"}

{{site.data.keyword.containerlong_notm}} 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{: external}

Release timeline

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The following table includes the expected release timeline for version 1.23 of {{site.data.keyword.containerlong}}. You can use this information for planning purposes, such as to estimate the general time that the version might become unsupported. {: shortdesc}

Dates that are marked with a dagger (†) are tentative and subject to change. {: important}

Version	Supported?	Release date	Unsupported date
1.23	Yes	09 Feb 2022	08 May 2023 †
{: caption="Release timeline for {{site.data.keyword.containerlong_notm}} version 1.23" caption-side="bottom"}

Preparing to update

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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{: external} and IBM version change log for version 1.23. You can also review the Kubernetes helpful warnings{: external}. {: shortdesc}

Update before master

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The following table shows the actions that you must take before you update the Kubernetes master. {: shortdesc}

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{: external}, you need to add the service IP CIDRs that you want to advertise to the default BGP configuration resource{: external}. In previous releases, the entire service IP range was advertised by setting an environment variable in the calico-node daemonset.
{: caption="Changes to make after you update the master to Kubernetes 1.23" caption-side="bottom"}

Update after master

{: #123_after_123}

The following table shows the actions that you must take after you update the Kubernetes master. {: shortdesc}

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{: external} 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.
{: caption="Changes to make after you update the master to Kubernetes 1.23" caption-side="bottom"}