* After upgrade, allow cilium to be back before uncordoning

* add eol

* use kube_config_dir variable
resolves https://github.com/kubernetes-sigs/kubespray/pull/7978#discussion_r721685549

to remove deprecation warning:

> Flag --feature-gates has been deprecated, This parameter should be set via the config file specified by the Kubelet's --config flag.

Closes https://github.com/kubernetes-sigs/kubespray/issues/8028



Signed-off-by: Iago Santos <iago.santos.pardo@adfinis.com>

Kubespray deployment failed when using containerd backend on nodes that apparmor was not installed or previously removed. This PR ensure apparmor is installed by adding it into required_pkgs var.

* gVisor: bump release to 20210921 version

* gVisor: drop support for 20210518.0 version

The addon-resizer container can reduce resource limits of cpu and
memory of metrics-server container in the pod, and that caused
OOMKilled.
In addition, the original metrics-server manifest doesn't contain
the addon-resizer container as [1].
So this adds metrics_server_resizer option to control the addon-resizer
container deployment and the default value is false to make it stable
for most environments.

[1]: https://github.com/kubernetes-sigs/metrics-server/blob/527679e5e8a103919c935d0575c20741796bc25d/manifests/base/deployment.yaml

* check if 'plugins' key exists in calico_cni_config object

* fix whitespace linting error

* fixed when list indentation

If using proxy, it is necessary to configure it before running
"subscription-manager status" command.
This adds the step.

"allowPrivilegeEscalation: false" blocks deploying metrics-server
on CentOS7. In addition, the original metrics-server manifest doesn't
contain it as [1]. This removes it.

[1]: https://github.com/kubernetes-sigs/metrics-server/blob/527679e5e8a103919c935d0575c20741796bc25d/manifests/base/deployment.yaml

* Kata-Containers: add 2.2.0 hashes and make default

* Kata-Containers: replace 2.1.0 with bugfix version 2.1.1

* Kata-Containers: move to q35 a more modern VM architecture as 'pc' is removed in 2.2.0

Kubespray deployment failed when using containerd backend on nodes that apparmor was not installed or previously removed. This PR ensure apparmor is installed by adding it into required_pkgs var.

This reverts commit c0e1211a.

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.

The typha prometheus settings were in the `volumeMounts` section of the
spec and not in the `envs` section. This was cauing the deployment to
fail because it was looking for a volumeMount.

```
failed: [controller-001.a2.da.dev.logdna.net] (item=calico-typha.yml) => {"ansible_loop_var": "item", "changed": false, "item": {"ansible_loop_var": "item", "changed": true, "checksum": "598ac79530749e8e2110793b53fc49ac208e7130", "dest": "/etc/kubernetes/calico-typha.yml", "diff": [], "failed": false, "gid": 0, "group": "root", "invocation": {"module_args": {"_original_basename": "calico-typha.yml.j2", "attributes": null, "backup": false, "checksum": "598ac79530749e8e2110793b53fc49ac208e7130", "content": null, "delimiter": null, "dest": "/etc/kubernetes/calico-typha.yml", "directory_mode": null, "follow": false, "force": true, "group": null, "local_follow": null, "mode": null, "owner": null, "regexp": null, "remote_src": null, "selevel": null, "serole": null, "setype": null, "seuser": null, "src": "/home/core/.ansible/tmp/ansible-tmp-1632349768.56-75434-32452975679246/source", "unsafe_writes": null, "validate": null}}, "item": {"file": "calico-typha.yml", "name": "calico", "type": "typha"}, "md5sum": "53c00ac7f562cf9ecbbfd27899ea066d", "mode": "0644", "owner": "root", "size": 5378, "src": "/home/core/.ansible/tmp/ansible-tmp-1632349768.56-75434-32452975679246/source", "state": "file", "uid": 0}, "msg": "error running kubectl (/opt/bin/kubectl --namespace=kube-system apply --force --filename=/etc/kubernetes/calico-typha.yml) command (rc=1), out='service/calico-typha unchanged\n', err='error: error validating \"/etc/kubernetes/calico-typha.yml\": error validating data: [ValidationError(Deployment.spec.template.spec.containers[0].volumeMounts[2]): unknown field \"value\" in io.k8s.api.core.v1.VolumeMount, ValidationError(Deployment.spec.template.spec.containers[0].volumeMounts[2]): missing required field \"mountPath\" in io.k8s.api.core.v1.VolumeMount, ValidationError(Deployment.spec.template.spec.containers[0].volumeMounts[3]): unknown field \"value\" in io.k8s.api.core.v1.VolumeMount, ValidationError(Deployment.spec.template.spec.containers[0].volumeMounts[3]): missing required field \"mountPath\" in io.k8s.api.core.v1.VolumeMount]; if you choose to ignore these errors, turn validation off with --validate=false\n'"}
```

* etcd: enable v2 api only if needed

Only enable v2 API if we have a consumer (flannel)
This reduce the exposed surface for etcd.

* Fix bad group name

and kubelet_shutdown_grace_period_critical_pods as ansible cannot do
sane time interval calculations

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

* make Calico 3.20.1 the default version
* drop Calico 3.17.x support

* Calico: make calico_min_version check relevant

* Calico: only check currently installed version against the oldest supported version by the previous release

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

On Debian 11, `ipset` just recommend `iptables` so on the system that apt is configured with `APT::Install-Recommends "0";` iptables will not install automatically.