## Changelog since v1.20.0-alpha.0

## Urgent Upgrade Notes

### (No, really, you MUST read this before you upgrade)

- Alpha swap support can now be enabled on Kubernetes nodes with the `NodeSwapEnabled` feature flag. See [KEP-2400](https://github.com/kubernetes/enhancements/blob/master/keps/sig-node/2400-node-swap/README.md#design-details) for details. ([#102823](https://github.com/kubernetes/kubernetes/pull/102823), [@ehashman](https://github.com/ehashman))

## What’s New (Major Themes)

### Kubernetes Topology Manager Moves to Beta - Align Up!

### Deprecation of FlexVolume

FlexVolume is deprecated. Out-of-tree CSI driver is the recommended way to write volume drivers in Kubernetes.
See [this doc](https://github.com/kubernetes/community/blob/master/sig-storage/volume-plugin-faq.md#kubernetes-volume-plugin-faq-for-storage-vendors) for more information.
Maintainers of FlexVolume drivers should implement a CSI driver and move users of FlexVolume to CSI.

	if err != nil {
		t.Fatalf("failed to get column type, got error: %v", err)
	}
	if !strings.Contains(strings.ToUpper(columnType.DatabaseTypeName()), "BLOB") {
		t.Fatalf("expected data column to be migrated to BLOB, got: %s", columnType.DatabaseTypeName())
	}
}

func TestMigrateMySQLWithCustomizedTypes(t *testing.T) {
	if DB.Dialector.Name() != "mysql" {
		t.Skip()
	}

### SIG Node

Pod with multiple containers can use `kubectl.kubernetes.io/default-container` annotation to have a container preselected for kubectl commands. More can be read in [KEP-2227](https://github.com/kubernetes/enhancements/blob/master/keps/sig-cli/2227-kubectl-default-container/README.md).

### Immutable Secrets and ConfigMaps

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## Known Issues
- volumeDevices mapping ignored when container is privileged

- The cluster addon for dashboard was removed. To install dashboard, see [here](https://github.com/kubernetes/dashboard/blob/master/docs/user/README.md). ([#107481](https://github.com/kubernetes/kubernetes/pull/107481), [@shu-mutou](https://github.com/shu-mutou))