GC now support custom resources

Deprecate system:nodes binding

…hub.io into release-1.8

* 'master' of https://github.com/kubernetes/kubernetes.github.io:
  Add noindex to vnext-staging
  Add note for 1.8 release. (#4632)
  fix create-cluster-kubeadm docs
  Update aws.md
  add newline above kube-apiserver
  Update scheduling-gpus.md
  Fix spacing with shell commands
  Documenting another (potential) callout issue (#4604)
  Update reference docs with most recent version of brodocs (#4600)
  Update kubernetes-api.md
  fix spelling mistake
  fix typos in fedration docs
  fix kubelet garbage collected typo
  fix typo in network-policies.md
  fix typo
  Add /_includes/glossary directory for snippets (#4628)
  Fixed typo in getting started guide using minikube
  Update to include Python library (#4624)
  Rename OWNERS assignees: to approvers:

…hub.io into release-1.8

* 'master' of https://github.com/kubernetes/kubernetes.github.io:
  fix command

…hub.io into release-1.8

* 'master' of https://github.com/kubernetes/kubernetes.github.io:
  include _headers (#4636)
  Update callouts.css
  Update callouts.css

…hub.io into release-1.8

* 'master' of https://github.com/kubernetes/kubernetes.github.io:
  fix noindex for vnext-staging (#4640)
  Add network overlay details to cloud routes flag
  Revert "Update volumes.md"
  add examples for interpod configurations (#4557)
  Update "readonly" in abac

…hub.io into release-1.8

* 'master' of https://github.com/kubernetes/kubernetes.github.io:
  Chenopis vnext staging noindex (#4641)

[1.8] StatefulSet `initialized` annotation is now ignored.

addresses /issues/4689

addresses /issues/4689

* Link to using kubeadm page

* fix the command output

fix the command output

* fix typo in api/resources reference: "Worloads"

* Add documentation for certificate rotation.

* Update config for 1.8 release.

* Address reviewer comments.

The HPA docs still referenced the alpha version.  This switches them to
talk about v2beta1, which is the appropriate version for Kubernetes 1.8

* Fix typo in pod preset conflict example

Move container port definition to the correct line.

* Highlight openstack-heat provider deprecation

The openstack-heat provider for kube-up is being deprecated and will be
removed in a future release.

* add draft workloads api content for 1.8

* edits per review, add tables, for 1.8 workloads api doc

* fix typo

- The kubelet upgrade instructions should be done on every host, not
  just worker nodes.
- We should just upgrade all packages, instead of calling out kubelet
  specifically. This will also upgrade kubectl, kubeadm, and
  kubernetes-cni, if installed.
- Draining nodes should also ignore daemonsets, and master errors can be
  ignored.
- Make sure that the new kubeadm download is chmoded correctly.
- Add a step to run `kubeadm version` to verify after downloading.
- Manually approve new kubelet CSRs if rotation is enabled (known issue).

* Fix versions for 1.8 API ref docs

* Updates for 1.8 kubectl reference docs

* Update docs/admin/kubeadm.md (mostly 1.8 related).

This is Fabrizio's work, which I'm committing along with my edits (in a commit on top of this).

* A few of my own edits to clarify and clean up some Markdown.