* [etcd] ensure etcd is properly upgraded when managed by kubeadm

* [CI] add periodic job to test upgrade of etcd managed by kubeadm

For offline mode

* As per this issue https://github.com/kubernetes-sigs/kubespray/pull/8664 I propose to make etcd v.3.5.3 default for any kubernetes version which uses 3.5.x since that 3.5.[0-2] not recommended for production.

* [upcloud] add upcloud csi-driver

* Option to use ansible_host as api ip for kubueconfig

* - add ability to specify the network_zone in hetzner terraform
- Export the network id from hetzner terraform the the generated inventory.ini

* - Add with_networks variable to allow different deployments of hcloud controller manager

- Add network id to hcloud controller secret (added via the inventory)

- Don't include extra_args if it's not set

The quotations in the variable nerdctl_extra_flags are not required for the `nerdctl_image_pull_command` and throw the following error when executing the cluster-playbook with `container_insecure_registries` set:
        unknown flag: --insecure-registry\\\"
This happens as the complete nerdctl_image_pull_command string variable gets split into an array string for the cmd task. The escaped quotation doesn't get escaped properly and is added to the cmd-string array as part of the command. This leads to a wrong written insecure-registry flag, which throws this error.

* [calico] add calico apiserver

* fix yamllint

* remove addext argument

* Configure API server with the CA bundle

* add check kdd

Signed-off-by: Mathieu Parent <math.parent@gmail.com>

Ensure all Kubelet required kernel values are configured when enabling protectKernelDefaults (#8692)

Signed-off-by: Cyril Corbon <corboncyril@gmail.com>

* feat: split kube_feature_gates variable for different kubernetes components

* docs: add kube_feaute_gates componet variables

Signed-off-by: Cyril Corbon <corboncyril@gmail.com>

* [containerd] add hashes for 1.5.11

* [containerd] add hashes for 1.6.2

* [containerd] make 1.6.2 the new default

Due to missing quotation of nerdctl_extra_flags, ansible-playbook was failed:

  Using module file /usr/local/lib/python3.6/dist-packages/ansible/modules/command.py
  Pipelining is enabled.
    [..]
    File "/usr/lib/python3.8/shlex.py", line 191, in read_token
      raise ValueError("No closing quotation")

This fixes the issue.

T-Eberle investigated the issue and found the solution.
Thank you T-Eberle!

If running Kubespray on static IP environments, a task was failed like:

  TASK [kubernetes/preinstall : Configure dhclient hooks for resolv.conf (RH-only)]
  fatal: [ak8s2]: FAILED! => {
    "changed": false, "checksum": "..",
    "msg": "Destination directory /etc/dhcp/dhclient.d does not exist"}

This adds a check for dhclientconffile for running 0100-dhclient-hooks to
run the task only if dhcpclient is enabled.

When running cluster.yml for new machines what containerd is already
install but Kubernetes cluster were not installed before, the task
"remove-node | List nodes" is failed like

  "changed": false,
  "cmd": [
    "/usr/local/bin/kubectl", "--kubeconfig",
    "/etc/kubernetes/admin.conf", "get", "nodes", "-o",
    "go-template={{ range .items }}{{ .metadata.name }}
    {{ "\n" }}{{ end }}"
   ],
   ..
   "stderr": "error: stat /etc/kubernetes/admin.conf: no such file or directory",

That was due to lack to check the existing Kubernetes cluster exists
or not before running "kubectl drain" command.
This adds the check to avoid the issue.

* Updated openstack cloud controller version to match kubernetes version

* Rolled back file structure change

* [calico] make vxlan encapsulation the default

* don't enable ipip encapsulation by default
* set calico_network_backend by default to vxlan
* update sample inventory and documentation

* [CI] pin default calico parameters for upgrade tests to ensure proper upgrade

* [CI] improve netchecker connectivity testing

* [CI] show logs for tests

* [calico] tweak task name

* [CI] Don't run the provisioner from vagrant since we run it in testcases_run.sh

* [CI] move kube-router tests to vagrant to avoid network connectivity issues during netchecker check

* service proxy mode still fails connectivity tests so keeping it manual mode

* [kube-router] account for containerd use-case