- Fixed a bug where vSphere client connections where not being closed during testing. Leaked vSphere client sessions were causing resource exhaustion during automated testing. ([#107337](https://github.com/kubernetes/kubernetes/pull/107337), [@derek-pryor](https://github.com/derek-pryor))

- Kubeadm: during "upgrade apply/diff/node", in case the `ClusterConfiguration.imageRepository` stored in the "kubeadm-config" `ConfigMap` contains the legacy "k8s.gcr.io" repository, modify it to the new default "registry.k8s.io". Reflect the change in the in-cluster `ConfigMap` only during "upgrade apply". ([#110343](https://github.com/kubernetes/kubernetes/pull/110343), [@neolit123](https://github.com/neolit123))...

- Kubeadm: fix a bug where file copy(backup) could not be executed correctly on Windows platform during upgrade ([#117861](https://github.com/kubernetes/kubernetes/pull/117861), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

  
  kubelet also ignores an error during opening `/dev/kmsg`.
  This feature gate also allows kube-proxy to ignore an error during setting `RLIMIT_NOFILE`.
  

  // +optional
  optional string initiatorName = 12;
}

// Maps a string key to a path within a volume.
message KeyToPath {
  // key is the key to project.
  optional string key = 1;

  // path is the relative path of the file to map the key to.
  // May not be an absolute path.
  // May not contain the path element '..'.
  // May not start with the string '..'.
  optional string path = 2;

	return map_ConfigMapEnvSource
}

var map_ConfigMapKeySelector = map[string]string{
	"":         "Selects a key from a ConfigMap.",
	"key":      "The key to select.",
	"optional": "Specify whether the ConfigMap or its key must be defined",
}

func (ConfigMapKeySelector) SwaggerDoc() map[string]string {
	return map_ConfigMapKeySelector
}

var map_ConfigMapList = map[string]string{

- Fixes an issue calculating total CPU usage reported for Windows nodes ([#122999](https://github.com/kubernetes/kubernetes/pull/122999), [@marosset](https://github.com/marosset)) [SIG Node and Windows]

							Type:        []string{"string"},
							Format:      "",
						},
					},
				},
				Required: []string{"replicas"},
			},
		},
	}
}

  // +optional
  optional string initiatorName = 12;
}

// Maps a string key to a path within a volume.
message KeyToPath {
  // key is the key to project.
  optional string key = 1;

  // path is the relative path of the file to map the key to.
  // May not be an absolute path.
  // May not contain the path element '..'.
  // May not start with the string '..'.
  optional string path = 2;

Kubernetes 1.15 consists of **25 enhancements**: 2 moving to stable, 13 in beta, and 10 in alpha. The main themes of this release are:

#### Continuous Improvement
- Project sustainability is not just about features. Many SIGs have been working on  improving test coverage, ensuring the basics stay reliable, and stability of the core feature set and working on maturing existing features and cleaning up the backlog.