- A namespaced object with an ownerReference referencing a uid of a namespaced kind which does not exist in the same namespace is now consistently treated as though that owner does not exist, and the child object is deleted.

- If the parent directory of the file specified in the `--audit-log-path` argument does not exist, Kubernetes now creates it. ([#111226](https://github.com/kubernetes/kubernetes/pull/111226), [@vpnachev](https://github.com/vpnachev)) [SIG Auth]

    * Add validation for upstreamNameserver port.
    * Update go version to 1.9.3.
* CRI: define the mount behavior when host path does not exist: runtime should report error if the host path doesn't exist ([#61460](https://github.com/kubernetes/kubernetes/pull/61460), [@feiskyer](https://github.com/feiskyer))

* fix azure disk mounter issue ([#52260](https://github.com/kubernetes/kubernetes/pull/52260), [@andyzhangx](https://github.com/andyzhangx))
* GCE: Fix issue deleting internal load balancers when the firewall resource may not exist. ([#53450](https://github.com/kubernetes/kubernetes/pull/53450), [@nicksardo](https://github.com/nicksardo))

moving the Kubelet plugin registration mechanism to beta, adding alpha support for a new CSI driver registry as well as for topology, and adding a number of alpha features to support the use of CSI for “local ephemeral volumes” (that is, volumes that exist for the lifecycle of a pod and contain some injected information, like a token or secret).

With Kubernetes v1.12, SIG Storage also introduced alpha support for [volume snapshotting](https://github.com/kubernetes/enhancements/issues/177)....

* GCE: Fix issue deleting internal load balancers when the firewall resource may not exist. ([#53450](https://github.com/kubernetes/kubernetes/pull/53450), [@nicksardo](https://github.com/nicksardo))

A vulnerability exists in the NodeRestriction admission controller where node users can delete their corresponding node object by patching themselves with an OwnerReference to a cluster-scoped resource. If the OwnerReference resource does not exist or is subsequently deleted, the given node object will be deleted via garbage collection. By default, node users are authorized for create and patch requests but not delete requests against their node object. Since the NodeRestriction admission controller...

- Kubeadm: when adding new control plane nodes with "kubeadm join", ensure that the etcd member addition is performed only if a given member URL does not already exist in the list of members. Similarly, on "kubeadm reset" only remove an etcd member if its ID exists. ([#127621](https://github.com/kubernetes/kubernetes/pull/127621), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

*   Fixed issue deleting internal load balancers when the firewall resource may not exist. ([#53450](https://github.com/kubernetes/kubernetes/pull/53450),[ @nicksardo](https://github.com/nicksardo))

### **Instrumentation**

#### **Audit**

### Ephemeral Containers Graduate to Stable