* Add scale master features

* Add certificate management with kubeadm

* Add kubeadm kubeconfig

* Fix ymalroles error

* fix upgrade cluster fialed

* force update cert and keys when you reconfigure cluster

download v1.12.3 kubernetes images failed

* Add images downloader to download roles

* Use single jinja2 templates

* add kube_version to templates

* add vars for cilium init container

* make yamllint happy

* add var cilium_init in downloads

* Add support for running a nodelocal dns cache

After encountering dns issues in a cluster I was recently working on I
noticed Kubernetes 1.13 introduced support for running a nodelocal dns
cache.

I believe this can usefull for more people.

https://github.com/kubernetes/kubernetes/commit/73b548db06c5e293533344c5b6171e955eac9ff1
https://github.com/kubernetes/enhancements/blob/master/keps/sig-network/0030-nodelocal-dns-cache.md

* Add requested changes

* Add additional requested changes + documentation

* Add requested changes after review

* Replace incorrect variable

* Upgrade kubernetes to v1.13.0

* Remove all precense of scheduler.alpha.kubernetes.io/critical-pod in templates

* Fix cert dir

* Use kubespray v2.8 as baseline for gitlab

* Remove non-kubeadm deployment

* More cleanup

* More cleanup

* More cleanup

* More cleanup

* Fix gitlab

* Try stop gce first before absent to make the delete process work

* More cleanup

* Fix bug with checking if kubeadm has already run

* Fix bug with checking if kubeadm has already run

* More fixes

* Fix test

* fix

* Fix gitlab checkout untill kubespray 2.8 is on quay

* Fixed

* Add upgrade path from non-kubeadm to kubeadm. Revert ssl path

* Readd secret checking

* Do gitlab checks from v2.7.0 test upgrade path to 2.8.0

* fix typo

* Fix CI jobs to kubeadm again. Fix broken hyperkube path

* Fix gitlab

* Fix rotate tokens

* More fixes

* More fixes

* Fix tokens

* Remove variables defined in download role. Fixes #3799

* Cleanup some more variables

* Fix bad templating

* Minor fix

* Add dashboard to download role. Fixes #3736

Upstream Changes:

  - ingress-nginx 0.21.0 (https://github.com/kubernetes/ingress-nginx/releases/tag/nginx-0.21.0)

Our Changes:

  - Sync templates with upstream changes
  - Remove --default-backend-service requirement. Use the flag only for custom default backends

When `ansible_user` is not root, using `-b` option.
And with `download_run_once` and `download_localhost` set `true`.

Ansible will executes `container_download | upload container images to nodes` task.

It uses rsync to upload images to `/tmp/release/container/`, but the
`container` directory owned by `root`.

* Support Metrics Server as addon (#3560).

* Update metrics server v0.3.1.

* Add metrics server test.

* Replace metrics server manifests with kubernetes/cluster/addons's.

* Modify metrics server manifests for kubespray.

* Follow PR#3558 node label node-role.kubernetes.io/master change

* Fix metrics server parameters base_metrics_server_... to metrics_server_...

* Fix too hard corded metrics_server_memory_per_node

* Add configurable insecure tls for metrics-apiservice

* Downloadable addon-resizer and extract parameter as variables

* Remove metrics server version from deployment name

* Metrics Server work when all masters has node role

* Download metrics-server and add-resizer container only on master

* ServiceAccount and ConfigMap is separated and fix application name

* Remove old metrics server clusterrole template

* Fix addon-resizer image specify

* Make InternalIP default for metrics_server_kubelet_preferred_address_types

Make InternalIP default because multiple preferrred address types does not work.

Upstream Changes:

-   cert-manager 0.5.2 (https://github.com/jetstack/cert-manager/releases/tag/v0.5.2)

Our Changes:

-   Templates sync with upstream manifests

* Update DNS Autoscaler to latest

* Update CoreDNS to latest

* Update KubeDNS to latest

* Add KubeDNS config map

* Fix filename

* Add missing selector to DNS Autoscaler

* Add missing tolerations

* Enable AutoScaler for CoreDNS

* Only use one template for dns autoscaler

* Rename a few variables for replicas and minimum pods

* Rename a few variables for replicas and minimum pods

* Remove replicas to make autoscale work

* Cleanup kubedns-autoscaler as it has been renamed

* weave: Upgrade to 2.5.0

Upstream Changes:

-   weave 2.5.0 (https://github.com/weaveworks/weave/releases/tag/v2.5.0)
-   Adds support for Kubernetes `hostPort` mapping
-   Adds support for Kubernetes `ipBlock` NetworkPolicy feature

Our Changes:

-   Templates sync with upstream manifests
-   Remove legacy nodePort fix

* BC for weave < 2.5.0

* Revert netchecker image and version

* Create namespace for netchecker

* Remove extra slashes

* Remove Vault

* Remove reference to 'kargo' in the doc

* change check order

* Adds support for Multus (multiple interfaces) CNI plugin

Multus is a latin word for "Multi". As the name suggests, it acts as a
Multi plugin in Kubernetes and provides multiple network interface
support in a pod. Multus uses the concept of invoking delegates by
grouping multiple plugins into delegates and invoking them in the
sequential order of the CNI configuration file provided in json format.

* Change CNI version (0.1.0->0.3.1) of Contiv to be compatible with Multus

Upstream Changes:

   - coredns v1.2.5 (https://github.com/coredns/coredns/releases/tag/v1.2.5)

NOTE:

   - Switch image repo to https://hub.docker.com/r/coredns/coredns/ (https://github.com/kubernetes-incubator/kubespray/pull/3595#issuecomment-433962973)

This reverts commit 8ba6b601.

Upstream Changes:

-   ingress-nginx 0.20.0 (https://github.com/kubernetes/ingress-nginx/releases/tag/nginx-0.20.0)

Our Changes:

-   Sync templates with upstream changes

* codestyle tests

* Download destination can be different than local_release_dir

kube-router v0.2.1 highlights from changelog:
- IPv6 WIP but pretty close to full working functionality
- fully support network policy semantics with addition of support for
  ipblock and except

* failed

* version_compare

* succeeded

* skipped

* success

* version_compare becomes version since ansible 2.5

* ansible minimal version updated in doc and spec

* last version_compare