Improve first_kube_control_plane variable management to avoid installation failures due to variable overlapping (#8388)

* Add kubectl variable

* Replace kubectl usage by kubectl variable in roles

* Remove redundant --kubeconfig on kubectl usage

* Replace unecessary shell usage with command

* Ensure entries for 1.23 are added for supported_versions vars

* cri-o: add support for kubernetes 1.23 but still use cri-o 1.22

* kubescheduler-config: diferentiate config versions based on kube_version

"kubeadm alpha certs" command has been promoted to "kubeadm certs" command,
and "kubeadm alpha certs" has been deprecated since Kubernetes v1.20 as [1].
In addition, Kubespray supports Kubernetes v1.20+.
This delete the deprecated command for cleanup.

[1]: https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.20.md#deprecation

* Improve control plane scale flow (#13)

* Added version 1.20.10 of K8s

* Setting first_kube_control_plane to a existing one

* Setting first_kube_control_plane to a existing one

* change first_kube_master for first_kube_control_plane

* Ansible-lint changes

* if bind-address is not set to 0.0.0.0

* Update docs and left comments

* fix yamllist check: remove space

Author:    lmercl <lubos.mercl@gmail.com>
Date:      Wed Nov 10 15:30:04 2021 +0000

fix markdown

* Add kubeadm_join_phases_skip variable

* Update kubeadm_join_phases_skip comment

Co-authored-by: Cristian Calin <6627509+cristicalin@users.noreply.github.com>

* Add kubeadm_join_phases_skip_default variable to follow the same logic with kubeadm_init_phases_skip

Co-authored-by: Cristian Calin <6627509+cristicalin@users.noreply.github.com>

The path of kubeconfig should be configurable, and its default value
is /etc/kubernetes/admin.conf. Most paths of the file are configurable
but some were not. This make those configurable.

Signed-off-by: Wang Zhen <lazybetrayer@gmail.com>

Add option to kubeadm upgrade command to control certificates renewal during control plane upgrade (#7976)

* Add option to kubeadm upgrade command to control certificates renewal during control plane upgrade

* Remove training whitespace

* Ansible: move to Ansible 3.4.0 which uses ansible-base 2.10.10

* Docs: add a note about ansible upgrade post 2.9.x

* CI: ensure ansible is removed before ansible 3.x is installed to avoid pip failures

* Ansible: use newer ansible-lint

* Fix ansible-lint 5.0.11 found issues

* syntax issues
* risky-file-permissions
* var-naming
* role-name
* molecule tests

* Mitogen: use 0.3.0rc1 which adds support for ansible 2.10+

* Pin ansible-base to 2.10.11 to get package fix on RHEL8

follow new naming conventions for gcr's coredns image.
starting from 1.21 kubeadm assumes it to be `coredns/coredns`:
this causes the kubeadm deployment being unable to pull image, beacuse `v`
was also added in image tag, until the role `kubernetes-apps` ovverides
it with the old name, which is only compatible with <=1.7.

Backward comptability with kubeadm <=1.20 is mantained checking
kubernetes version and falling back to old names (`coredns:1.xx`) when
the version is less than 1.21

* rename ansible groups to use _ instead of -

k8s-cluster -> k8s_cluster
k8s-node -> k8s_node
calico-rr -> calico_rr
no-floating -> no_floating

Note: kube-node,k8s-cluster groups in upgrade CI
      need clean-up after v2.16 is tagged

* ensure old groups are mapped to the new ones

Fixes "mapping values are not allowed in this context

This allow to configure when K8S certificates renewal runs

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

We were regenerating only the cert of the first node
While at it speed up the check step

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

Use kubeadm_feature_gates instead of kube_feature_gates to leverage kubeadm feature gates and not to interfere with k8s components feature gates (#7447)

* add CI test for auto_renew_certificates

* change timer value

fix typo error in rotate cert script

According to the document[1], audit-webhook-batch-max-size and
audit-webhook-batch-max-wait are used only in the batch mode.
This adds a condition to avoid unnecessary writting on the config.

[1]: https://kubernetes.io/docs/tasks/debug-application-cluster/audit/#batching

* Add KubeSchedulerConfiguration for k8s 1.19 and up

With release of version 1.19.0 of kubernetes KubeSchedulerConfiguration
was graduated to beta. It allows to extend different stages of
scheduling with profiles. Such effect is achieved by using plugins and
extensions.

This patch adds KubeSchedulerConfiguration for versions 1.19 and later.
Configuration is set to k8s defaults or to kubespray vars. Moving those
defaults to new vars will be done in following patch.

Signed-off-by: Maciej Wereski <m.wereski@partner.samsung.com>

* KubeSchedulerConfiguration: add defaults

Signed-off-by: Maciej Wereski <m.wereski@partner.samsung.com>

fix undefinedElse

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

`-%` causes `etcd-unsupported-arch: arm64` to print on COL 1 instead of
COL 6.

Signed-off-by: anthr76 <hello@anthonyrabbito.com>

This replaces kube-master with kube_control_plane because of [1]:

  The Kubernetes project is moving away from wording that is
  considered offensive. A new working group WG Naming was created
  to track this work, and the word "master" was declared as offensive.
  A proposal was formalized for replacing the word "master" with
  "control plane". This means it should be removed from source code,
  documentation, and user-facing configuration from Kubernetes and
  its sub-projects.

NOTE: The reason why this changes it to kube_control_plane not
      kube-control-plane is for valid group names on ansible.

[1]: https://github.com/kubernetes/enhancements/blob/master/keps/sig-cluster-lifecycle/kubeadm/2067-rename-master-label-taint/README.md#motivation

While at it remove force_certificate_regeneration
This boolean only forced the renewal of the apiserver certs
Either manually use k8s-certs-renew.sh or set auto_renew_certificates

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

c9c0c01d only fix the problem for new clusters

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

The important action in kubeadm-version.yml is the templating of the configuration,
not finding / setting the version

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

There are no reasons not to backup during upgrade

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

kubeadm never rotates sa.key/sa.pub, so there is no need to delete tokens/restart pods

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

kubeadm is the default for a long time now,
and admin.conf is created by it, so let kubeadm handle it

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>