- The mount-utils mounter now provides an...

### Continued improvement of CSI

- Fixed a regression where `kubelet --hostname-override` no longer worked
  correctly with an external cloud provider. ([#124516](https://github.com/kubernetes/kubernetes/pull/124516), [@danwinship](https://github.com/danwinship))

  
  Fixed the EndpointController to allow IPv6 headless services, if the IPv6DualStack
  feature gate is enabled, by specifying `ipFamily: IPv6` on the service. (This already
  worked with the EndpointSliceController.) ([#91399](https://github.com/kubernetes/kubernetes/pull/91399), [@danwinship](https://github.com/danwinship)) [SIG Apps and Network]

### SIG Openstack

*   Fixed iptables FORWARD policy for Docker 1.13 in kubernetes-worker charm ([#54796](https://github.com/kubernetes/kubernetes/pull/54796),[ @Cynerva](https://github.com/Cynerva))

* kubeadm creates RBAC-enabled clusters. This means that some add-ons which worked previously won't work without having their YAML configuration updated. Please see each vendor's own documentation to check that the add-ons you are using will work with Kubernetes 1.6.

- For vSphere Cloud Provider, If VM of worker node is deleted, the node will also be deleted by node controller ([#92608](https://github.com/kubernetes/kubernetes/pull/92608), [@lubronzhan](https://github.com/lubronzhan)) [SIG Cloud Provider]

* Fixes a bug concerning Quobyte volumes where user mappings only worked if the hosts Kubernetes plugin mount was provided via an external configuration using the _allow-usermapping-in-volumename_ option. ([#74520](https://github.com/kubernetes/kubernetes/pull/74520), [@casusbelli](https://github.com/casusbelli))

- kubeadm now works better when not connected to the Internet. In addition,  common kubeadm commands will now work without an available networking interface. ([#67397](https://github.com/kubernetes/kubernetes/pull/67397), [@neolit123](https://github.com/neolit123))