Docker: replace the use of containerd_version with docker_containerd_version to avoid causing conflicts when bumping containerd_version (#8130)

* Fix invalid link to Ansible documentation

* Fix invalid link to mitogen doc page

* Fix invalid link to calico doc page

* Fix all invalid links to doc pages

* Fedora and RHEL use etc_t and the convention is <type_name>_t

* Docs: specify all values for preinstall_selinux_state

* CI: Add Fedora 34 with SELinux in enforcing mode

* Update vars.md to remove mention of string syntax of node_labels

Fixes https://github.com/kubernetes-sigs/kubespray/issues/6215

* Try fix makrdown linting

* Update docs/vars.md

This replaces master with "control plane" in Kubespray docs
because of [1].

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

* 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

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 documentation for audit webhook variables

* Enclose the value of  audit_webhook_server_url in a codeblock

* Add default value for audit_webhook_batch_max_wait

* Set containerd version to 1.4.3

* Set containerd version to 1.4.4

Co-authored-by: Barry Melbourne <9964974+bmelbourne@users.noreply.github.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

This is a small step to replace "master" with "control-plane" in
Kubespray project.

* Fix etcd download dest

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

* Only support Helm v3, cleanup install

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

No longer used/supported

If no_proxy_exclude_workers is true, workers will be excluded from the no_proxy variable.  This prevents docker engine restarting when scaling workers. (#6520)

Signed-off-by: holmesb <5072156+holmesb@users.noreply.github.com>

* Rotate kubelet server certificate.

* CI test kubelet server cert rotation

* Approve kubelet serving certificates in tests.

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

Add the `container_manager` variable as a Cluster Variable in the global Docs

* Fix incorrect assertion comparison for kube_network_node_prefix

* Ignore assertion comparison for kube_network_node_prefix when using calico

* Adding more var docs description for kube_network_node_prefix

* Fixing trailing whitespaces

* Ability to define plugins.cri.containerd params

* addition of containerd field commented as an example

* documentation of containerd_config

* Introduce kubelet_config_extra_args and kubelet_node_config_extra_args to pass params to kubelet via YAML config

* kubelet_config_extra_args is not the alternative

Fix http link to https link for security

Signed-off-by: Nguyen Hai Truong <truongnh@vn.fujitsu.com>

* set helm 3.0 as default

* remove trainling space in vars.yml

* switched to helm 3.0.3

* improve documentation about user acct and connecting to API

* fix lint

* Add Helm 3.x support

* tiller enabled when helm < 3.0.0

Signed-off-by: Guangming Wang <guangming.wang@daocloud.io>

* Add support for Docker plugins

* support multiple Docker plugins using looped include

* fix yamllint error