- Kubernetes 1.12 includes a large number of metadata agent improvements, including expanding the metadata agent's access to all API groups and removing metadata agent config maps in favor of command line flags. It also includes improvements to the logging agent, such as multiple fixes and adjustments.

### Other notable changes

* Metadata Agent Improvements ([#66485](https://github.com/kubernetes/kubernetes/pull/66485), [@bmoyles0117](https://github.com/bmoyles0117))
    * Bump metadata agent version to 0.2-0.0.21-1.
    * Expand the metadata agent's access to all API groups.
    * Remove metadata agent config maps in favor of command line flags.

* Add NoSchedule/NoExecute tolerations to ip-masq-agent, ensuring it to be scheduled in all nodes except master. ([#66260](https://github.com/kubernetes/kubernetes/pull/66260), [@tanshanshan](https://github.com/tanshanshan))
* Metadata Agent Improvements ([#66485](https://github.com/kubernetes/kubernetes/pull/66485), [@bmoyles0117](https://github.com/bmoyles0117))
    * Bump metadata agent version to 0.2-0.0.21-1.

- GCE/Windows: added support for the stackdriver logging agent ([#76850](https://github.com/kubernetes/kubernetes/pull/76850), [@yujuhong](https://github.com/yujuhong))

	* ip-masq-agent is now on by default for GCE ([#47794](https://github.com/kubernetes/kubernetes/pull/47794), [@dnardo](https://github.com/dnardo))

  - ip-mask-agent addon starts to use the label `node.kubernetes.io/masq-agent-ds-ready` instead of `beta.kubernetes.io/masq-agent-ds-ready` as its node selector.

* Bump ip-masq-agent version to v2.3.0 to fix vulnerabilities ([#77833](https://github.com/kubernetes/kubernetes/pull/77833), [@anfernee](https://github.com/anfernee))

    * In 1.16, the masq-agent daemonset add-on will switch to using `node.kubernetes.io/masq-agent-ds-ready` as a node selector.
* Kubelet: replace `du` and `find` with a golang implementation ([#74675](https://github.com/kubernetes/kubernetes/pull/74675), [@dashpole](https://github.com/dashpole))

    <magic priority="55">
      <match minShouldMatch="2">
        <match value="user-agent:" type="stringignorecase" offset="0"/>
        <match value="sitemap:" type="stringignorecase" offset="0"/>
        <match value="\nuser-agent:" type="stringignorecase" offset="0:1000"/>
        <match value="\nallow:" type="stringignorecase" offset="0:1000"/>

  // options is Optional: this field holds extra command options if any.
  // +optional
  map<string, string> options = 5;
}

// Represents a Flocker volume mounted by the Flocker agent.
// One and only one of datasetName and datasetUUID should be set.
// Flocker volumes do not support ownership management or SELinux relabeling.
message FlockerVolumeSource {