* The Certificates API has graduated from alpha to beta. This is a backwards-incompatible change since the alpha support is dropped, and therefore kubeadm v1.5 and v1.6 don't work together (for example kubeadm v1.5 can't join a kubeadm v1.6 cluster).
* Supporting only etcd3, with 3.0.14 as the minimum version.

* Fixed cleanup of CSI metadata files. ([#65323](https://github.com/kubernetes/kubernetes/pull/65323), [@jsafrane](https://github.com/jsafrane))
* Fix an issue with dropped audit logs, when truncating and batch backends enabled at the same time. ([#65823](https://github.com/kubernetes/kubernetes/pull/65823), [@loburm](https://github.com/loburm))

- kube-scheduler dropped support for configuration files with apiVersion `componentconfig/v1alpha1`. Ensure kube-scheduler is configured using command-line flags or a configuration file with apiVersion `kubescheduler.config.k8s.io/v1alpha1` before upgrading to 1.13.

- CRDs: For structural schemas, non-nullable null map fields will now be dropped and defaulted if a default is available. null items in the list will continue being preserved, and fail validation if not nullable. ([#95423](https://github.com/kubernetes/kubernetes/pull/95423), [@apelisse](https://github.com/apelisse)) [SIG API...

- Dropped support for the Container Runtime Interface (CRI) version `v1alpha2`, which means that container runtimes just have to implement `v1`. ([#110618](https://github.com/kubernetes/kubernetes/pull/110618), [@saschagrunert](https://github.com/saschagrunert))...

		t.Fatal("should found renamed table")
	}

	DB.Migrator().DropTable("new_table_structs")

	if DB.Migrator().HasTable(&NewTableStruct{}) {
		t.Fatal("should not found dropped table")
	}
}

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

	type QuotedIndexStruct struct {
		gorm.Model

 - Fixes a regression in 1.17 that dropped cache-control headers on API requests ([#90468](https://github.com/kubernetes/kubernetes/pull/90468), [@liggitt](https://github.com/liggitt)) [SIG API Machinery and Testing]

* Detach and clear bad disk URI ([#58345](https://github.com/kubernetes/kubernetes/pull/58345), [@rootfs](https://github.com/rootfs))
* Add apiserver metric for number of requests dropped because of inflight limit. ([#58340](https://github.com/kubernetes/kubernetes/pull/58340), [@gmarek](https://github.com/gmarek))

  now be able to stop doing that. ([#92035](https://github.com/kubernetes/kubernetes/pull/92035), [@danwinship](https://github.com/danwinship)) [SIG Network and Node]
- Fixes a regression in 1.17 that dropped cache-control headers on API requests ([#90468](https://github.com/kubernetes/kubernetes/pull/90468), [@liggitt](https://github.com/liggitt)) [SIG API Machinery and Testing]

- Kube-proxy in nftables mode now allows pods on nodes without local service endpoints to access LoadBalancer Service ExternalIPs (with `externalTrafficPolicy: Local`). Previously, such traffic was dropped. This change brings nftables mode in line with iptables and IPVS modes, allowing traffic to be forwarded to available endpoints elsewhere in the cluster. ([#133969](https://github.com/kubernetes/kubernetes/pull/133969), [@aroradaman](https://github.com/aroradaman))...