refactor: extract DNS configuration from kubernetes/preinstall into dns_config role (#13603)

Extract tasks related to host DNS management from kubernetes/preinstall
into a new kubernetes/dns_config role.

Previously, kubernetes/preinstall was re-invoked at the end of cluster
playbooks with dns_late: true to apply resolvconf changes after cluster
DNS came up. Because of this reuse, several unrelated tasks in preinstall
were guarded with 'when: not dns_late'.

Move resolvconf, systemd-resolved, networkmanager-dns, and dhclient tasks,
along with their associated templates, facts, variables, and handlers, into
kubernetes/dns_config. Update cluster.yml, upgrade_cluster.yml, scale.yml,
and reset.yml to invoke the new role directly and remove dns_late guards.

Signed-off-by: Dasmat13 <gptdasmat@gmail.com>

roles/kubernetes/preinstall/handlers/main.yml

@@ -1,129 +1,8 @@
 ---
-- name: Preinstall | apply resolvconf cloud-init
-  command: /usr/bin/coreos-cloudinit --from-file {{ resolveconf_cloud_init_conf }}
-  when: ansible_facts['os_family'] == "Flatcar"
-  listen: Preinstall | propagate resolvconf to k8s components
-
 - name: Preinstall | reload NetworkManager
   service:
     name: NetworkManager.service
     state: restarted
-  listen: Preinstall | update resolvconf for networkmanager
-
-- name: Preinstall | reload kubelet
-  service:
-    name: kubelet
-    state: restarted
-  notify:
-    - Preinstall | kube-controller configured
-    - Preinstall | kube-apiserver configured
-    - Preinstall | restart kube-controller-manager docker
-    - Preinstall | restart kube-controller-manager crio/containerd
-    - Preinstall | restart kube-apiserver docker
-    - Preinstall | restart kube-apiserver crio/containerd
-  when: not dns_early | bool
-  listen:
-    - Preinstall | propagate resolvconf to k8s components
-    - Preinstall | update resolvconf for networkmanager
-
-# FIXME(mattymo): Also restart for kubeadm mode
-- name: Preinstall | kube-apiserver configured
-  stat:
-    path: "{{ kube_manifest_dir }}/kube-apiserver.yaml"
-    get_attributes: false
-    get_checksum: false
-    get_mime: false
-  register: kube_apiserver_set
-  when: ('kube_control_plane' in group_names) and dns_mode != 'none' and resolvconf_mode == 'host_resolvconf'
-  listen: Preinstall | propagate resolvconf to k8s components
-
-# FIXME(mattymo): Also restart for kubeadm mode
-- name: Preinstall | kube-controller configured
-  stat:
-    path: "{{ kube_manifest_dir }}/kube-controller-manager.yaml"
-    get_attributes: false
-    get_checksum: false
-    get_mime: false
-  register: kube_controller_set
-  when: ('kube_control_plane' in group_names) and dns_mode != 'none' and resolvconf_mode == 'host_resolvconf'
-  listen: Preinstall | propagate resolvconf to k8s components
-
-- name: Preinstall | restart kube-controller-manager docker
-  shell: "set -o pipefail && {{ docker_bin_dir }}/docker ps -f name=k8s_POD_kube-controller-manager* -q | xargs --no-run-if-empty {{ docker_bin_dir }}/docker rm -f"
-  args:
-    executable: /bin/bash
-  when:
-    - container_manager == "docker"
-    - ('kube_control_plane' in group_names)
-    - dns_mode != 'none'
-    - resolvconf_mode == 'host_resolvconf'
-    - kube_controller_set.stat.exists
-  listen: Preinstall | propagate resolvconf to k8s components
-
-- name: Preinstall | restart kube-controller-manager crio/containerd
-  shell: "set -o pipefail && {{ bin_dir }}/crictl pods --name kube-controller-manager* -q | xargs -I% --no-run-if-empty bash -c '{{ bin_dir }}/crictl stopp % && {{ bin_dir }}/crictl rmp %'"
-  args:
-    executable: /bin/bash
-  register: preinstall_restart_controller_manager
-  retries: 10
-  delay: 1
-  until: preinstall_restart_controller_manager.rc == 0
-  when:
-    - container_manager in ['crio', 'containerd']
-    - ('kube_control_plane' in group_names)
-    - dns_mode != 'none'
-    - resolvconf_mode == 'host_resolvconf'
-    - kube_controller_set.stat.exists
-  listen: Preinstall | propagate resolvconf to k8s components
-
-- name: Preinstall | restart kube-apiserver docker
-  shell: "set -o pipefail && {{ docker_bin_dir }}/docker ps -f name=k8s_POD_kube-apiserver* -q | xargs --no-run-if-empty {{ docker_bin_dir }}/docker rm -f"
-  args:
-    executable: /bin/bash
-  when:
-    - container_manager == "docker"
-    - ('kube_control_plane' in group_names)
-    - dns_mode != 'none'
-    - resolvconf_mode == 'host_resolvconf'
-    - kube_apiserver_set.stat.exists
-  listen: Preinstall | propagate resolvconf to k8s components
-
-- name: Preinstall | restart kube-apiserver crio/containerd
-  shell: "set -o pipefail && {{ bin_dir }}/crictl pods --name kube-apiserver* -q | xargs -I% --no-run-if-empty bash -c '{{ bin_dir }}/crictl stopp % && {{ bin_dir }}/crictl rmp %'"
-  args:
-    executable: /bin/bash
-  register: preinstall_restart_apiserver
-  retries: 10
-  until: preinstall_restart_apiserver.rc == 0
-  delay: 1
-  when:
-    - container_manager in ['crio', 'containerd']
-    - ('kube_control_plane' in group_names)
-    - dns_mode != 'none'
-    - resolvconf_mode == 'host_resolvconf'
-    - kube_apiserver_set.stat.exists
-  listen: Preinstall | propagate resolvconf to k8s components
-
-# When running this as the last phase ensure we wait for kube-apiserver to come up
-- name: Preinstall | wait for the apiserver to be running
-  uri:
-    url: "{{ _kube_apiserver_local_endpoint }}/healthz"
-    validate_certs: false
-  register: result
-  until: result.status == 200
-  retries: 60
-  delay: 1
-  when:
-    - dns_late
-    - ('kube_control_plane' in group_names)
-    - dns_mode != 'none'
-    - resolvconf_mode == 'host_resolvconf'
-  listen: Preinstall | propagate resolvconf to k8s components
-
-- name: Preinstall | Restart systemd-resolved
-  service:
-    name: systemd-resolved
-    state: restarted
 
 - name: Preinstall | restart ntp
   service: