k8s-dns-node-cache now uses debian-iptables base images
to automatically use either iptables-legacy or iptables-nft
https://github.com/kubernetes/dns/pull/355
https://github.com/kubernetes/kubernetes/pull/82966



This adds support CentOS 8

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

Fix check if user can use docker without sudo.

New override are added to allow installation of the registry
on different ports than ``5000``. The default port is unchanged
from previous versions

I propose also my help as a reviewer

* fedora coreos support
- bootstrap and new fact for

* fedora coreos support
- fix bootstrap condition

* fedora coreos support
- allow customize packages for fedora coreos bootstrap

* fedora coreos support
- prevent install ptyhon3 and epel via dnf for fedora coreos

* fedora coreos support
- handle all ostree like os in same way

* fedora coreos support
- handle all ostree like os in same way for crio

* fedora coreos support
- add fcos documentations

Because using python Program create inventory it will happen error, thus I change python pip version to install kubespray requirements.

* Add variables to configure Containerd default runtime, untrusted runtime and additional runtimes

* Add containerd settings to sample inventory

* Empty commit

Related to #5432

* Add AWS ALB Ingress Controller Ansible role

* remove trailing spaces

* update owners

* ALB ingress: update rbac clusterrole and remove role

* Move alb-ingress role to roles/kubernetes-apps/ingress_controller folder

* Add document about adding/replacing a node

* Update nodes.md

Amend for comments

* Support configuring the insert mode

Defaults to the upstream default https://docs.projectcalico.org/v3.9/reference/felix/configuration

so nothing should change for existing deployments.

This allows coexistence with other firewall management technologies.

* Add a note to the sample config

Solves problem with mitogen about 'Compress object has no attribute copy' in zlib module.

* Merge OracleLinux in RedHat bootstrap-os

* Set default for use_oracle_public_repo in main.yaml

Allows to configure additionnal zone for domains not resolved by `upstream_dns_servers`.

* Add docker-ce 19.03 packages for Debian & Ubuntu

K8s has updated the recommended Docker version to 19.03. More
specifically it should be 19.03.4, but since we used 18.06.7 instead of
.2, I'm assuming the latest patch version should be used here as well.

* Add docker 19.03 for redhat

* Use k8s.gcr.io for kubernetes related images

* Use k8s.gcr.io in inventory sample

* Kubernetes 1.16.8

* Use 1.16.8 in sample inventory and kubespray-defaults

* upgrade metrics server and resizer images version

* scope "apps" api group for addon resizer

Signed-off-by: Chris Randles <randles.chris@gmail.com>