- The formerly publicly-available cAdvisor web UI that the kubelet started using `--cadvisor-port` has been entirely removed in 1.12. The recommended way to run cAdvisor if you still need it, is via a DaemonSet. ([#65707](https://github.com/kubernetes/kubernetes/pull/65707), [@dims](https://github.com/dims))...

/default.etcd

# Also ignore protoc installed by hack/install-protoc.sh
/third_party/protoc*

# User cluster configs
.kubeconfig

.tags*

# Version file for dockerized build
.dockerized-kube-version-defs

# Web UI
/www/master/node_modules/
/www/master/npm-debug.log
/www/master/shared/config/development.json

# Karma output
/www/test_out

* The formerly publicly-available cAdvisor web UI that the kubelet ran on port 4194 by default is now turned off by default. The flag configuring what port to run this UI on `--cadvisor-port` was deprecated in v1.10. Now the default is `--cadvisor-port=0`, in other words, to not run the web server. If you still need to run cAdvisor, the recommended way to run it is via a DaemonSet. Note that the `--cadvisor-port` will...

- CustomResourcesDefinition conversion via Web Hooks is promoted to beta. Note that you must set `spec.preserveUnknownFields` to `false`. ([#78426](https://github.com/kubernetes/kubernetes/pull/78426), [@sttts](https://github.com/sttts))

* kubeadm: Remove hard-coded default version when fetching stable version from the web fails. Fixes [kubeadm 1.6.1 deploying 1.6.0 control plane](https://github.com/kubernetes/kubeadm/issues/224). ([#43999](https://github.com/kubernetes/kubernetes/pull/43999), [@mikedanese](https://github.com/mikedanese))