Revert "Fix for unknown 'kubernetes.io' or 'k8s.io' labels specified with --node-labels (#4320)" (#4553)

This reverts commit 586ad89d.

This reverts commit 31650862.

* Use Kubernetes 1.14 and experimental control plane support

* bump to v1.14.0

* Added generic CNI network plugin

* Added CNI network plugin documentation

* added necessary fix

* Fix the file path for all.yml and k8s-cluster.yml

* Fix --node-labels namespace error "unknown labels specified"

* Update templates and configs kubelet node-labels

Signed-off-by: André R. de Miranda <andre@miranda.work>

quote values for kube_oidc_groups_prefix and kube_oidc_username_prefix values to accept colon, e.g oidc: (#4305)

This will fix error: error converting YAML to JSON: yaml: line 36: mapping values are not allowed in this context

Signed-off-by: Abdulaziz AlMalki <almalki.a@gmail.com>

an 'until' clause is required or 'retries' is ignored

(see note @ https://docs.ansible.com/ansible/latest/user_guide/playbooks_loops.html#do-until-loops)

* robust handling of API server SANs

* use apiserver_loadbalancer_domain_name if it is defined, according to PR 3977

* enable kubelet client certificate rotation

* change to variable kubelet_rotate_certificates

Both kubedns and dnsmasq modes are long not maintained.
We should run dns_late steps at the end because sshd
makes DNS lookups during Ansible run and has 2s timeouts
for each failed lookup trying to connect to coredns before
it is ready.

* Added configurable local apiserver proxy liveness probe

* Enable API LB healthcheck by default

* Fix template spacing and moved healthz location to nginx http section

* Fix healthcheck listen address to allow kubelet request healthcheck

This reverts commit ea7a6f1c.

This change modified the certs dir for Kubernetes, but did not move the directories for existing clusters.

Pods on down/unresponsive nodes can't be deleted without
--force --grace-period=0.

Fixes #4314

* Remove hard dependence on facts for all nodes

* Update main.yaml

* Update main.yaml

* fact gathering should run only once per node
* eliminate ansible version check, it is at the beginning of each
  playbook

This was already approved in #4106 but there are CI issues
with that PR due to references to kubernetes incubator.

After upgrading to Kubespray 2.8.1 with Kubeadm enabled Rook
Ceph volume provision failed due to the flexvolume plugin dir not
being correct. Adding the var fixed the issue

because of etc-kubernetes-manifests not empty.

* Adding ability to maintain existing Encryption Secrets at Rest.

If secrets_encryption.yaml is present it will not be overriten with a new kube_encrypt_token.

This should allow for it to be set ahead of a playbook running or maintain it if cluster.yml is ran on the same cluster and the ansible host does not have access to the secrets.

* Setting existing kube_encrypt_token across all master nodes in case it was missing in one or more nodes.

Fix issue where `kubeadm join` could wait forever for joining.

Fix issue where `kubeadm join` were not reaching the user, making
impossible to find the cause of the failure.

New behaviour is to first attempt to join without bypassing the
verifications checks and to display them if needed.

If this fails it still attempts to join by ignoring the check in
order to make previous behavior.

A timeout of 60 seconds is allocated for a joining.

Related-bug: #3973

check kube_pods_subnet and kube_service_addresses to valid ip network range, not single ip address (#4188)