Merge pull request #47206 from RomanBednar/pv-last-phase-transition-time-ga-blog

Add blog for PersistentVolumeLastPhaseTransitionTime feature GA in v1.31

Author: k8s-ci-robot

content/en/blog/_posts/2024-08-14-pv-last-phase-transition-time-ga.md

@@ -0,0 +1,34 @@
+---
+layout: blog
+title: "Kubernetes v1.31: PersistentVolume Last Phase Transition Time Moves to GA"
+date: 2024-08-14
+slug: last-phase-transition-time-ga
+author: >
+  Roman Bednář (Red Hat)
+---
+
+Announcing the graduation to General Availability (GA) of the PersistentVolume `lastTransitionTime` status
+field, in Kubernetes v1.31!
+
+The Kubernetes SIG Storage team is excited to announce that the "PersistentVolumeLastPhaseTransitionTime" feature, introduced
+as an alpha in Kubernetes v1.28, has now reached GA status and is officially part of the Kubernetes v1.31 release. This enhancement
+helps Kubernetes users understand when a [PersistentVolume](/docs/concepts/storage/persistent-volumes/) transitions between 
+different phases, allowing for more efficient and informed resource management.
+
+For a v1.31 cluster, you can now assume that every PersistentVolume object has a
+`.status.lastTransitionTime` field, that holds a timestamp of
+when the volume last transitioned its phase. This change is not immediate; the new field will be populated whenever a PersistentVolume
+is updated and first transitions between phases (`Pending`, `Bound`, or `Released`) after upgrading to Kubernetes v1.31.
+
+## What changed?
+
+The API strategy for updating PersistentVolume objects has been modified to populate the `.status.lastTransitionTime` field with the
+current timestamp whenever a PersistentVolume transitions phases. Users are allowed to set this field manually if needed, but it will
+be overwritten when the PersistentVolume transitions phases again.
+
+For more details, read about
+[Phase transition timestamp](/docs/concepts/storage/persistent-volumes/#phase-transition-timestamp) in the Kubernetes documentation.
+You can also read the previous [blog post](/blog/2023/10/23/persistent-volume-last-phase-transition-time) announcing the feature as alpha in v1.28.
+
+To provide feedback, join our [Kubernetes Storage Special-Interest-Group](https://github.com/kubernetes/community/tree/master/sig-storage) (SIG)
+or participate in discussions on our [public Slack channel](https://app.slack.com/client/T09NY5SBT/C09QZFCE5).