Split kubespray-defaults (-> network_facts)

kubespray-defaults currently does two things:
- records a number of default variable values (in particular values used
  in several places)
- gather and compose some complex network facts (in particular,
  `fallback_ip` and `no_proxy`

There is no actual reason to couple those two things, and it makes using
defaults more difficult (because computing the network facts is somewhat
expensive, we don't want to do it willy-nilly)

Split the two and adjust import paths as needed.

roles/kubespray-defaults/tasks/main.yaml

@@ -1,58 +0,0 @@
----
-- name: Set facts variables
-  tags:
-    - always
-  block:
-    - name: Gather ansible_default_ipv4
-      setup:
-        gather_subset: '!all,network'
-        filter: "ansible_default_ipv4"
-      when: ansible_default_ipv4 is not defined
-      ignore_unreachable: true
-      # Set 127.0.0.1 as fallback IP if we do not have host facts for host
-      # ansible_default_ipv4 isn't what you think.
-      # https://medium.com/opsops/ansible-default-ipv4-is-not-what-you-think-edb8ab154b10
-      # TODO: discard this and update all the location relying on it in "looping on hostvars" templates
-    - name: Set fallback_ip
-      set_fact:
-        fallback_ip: "{{ ansible_default_ipv4.address | d('127.0.0.1') }}"
-      when: fallback_ip is not defined
-
-    - name: Gather ansible_default_ipv6
-      setup:
-        gather_subset: '!all,network'
-        filter: "ansible_default_ipv6"
-      when: ansible_default_ipv6 is not defined
-      ignore_unreachable: true
-    - name: Set fallback_ip6
-      set_fact:
-        fallback_ip6: "{{ ansible_default_ipv6.address | d('::1') }}"
-      when: fallback_ip6 is not defined
-
-    - name: Set main access ip(access_ip based on ipv4_stack/ipv6_stack options).
-      set_fact:
-        cacheable: true
-        main_access_ip: >-
-          {%- if ipv4_stack -%}
-          {{ access_ip | default(ip | default(fallback_ip)) }}
-          {%- else -%}
-          {{ access_ip6 | default(ip6 | default(fallback_ip6)) }}
-          {%- endif -%}
-
-    - name: Set main ip(ip based on ipv4_stack/ipv6_stack options).
-      set_fact:
-        main_ip: "{{ (ip | default(fallback_ip)) if ipv4_stack else (ip6 | default(fallback_ip6)) }}"
-
-    - name: Set main access ips(mixed ips for dualstack).
-      set_fact:
-        main_access_ips: ["{{ (main_access_ip + ',' + (access_ip6 | default(ip6 | default(fallback_ip6)))) if (ipv4_stack and ipv6_stack) else main_access_ip }}"]
-
-    - name: Set main ips(mixed ips for dualstack).
-      set_fact:
-        main_ips: ["{{ (main_ip + ',' + (ip6 | default(fallback_ip6))) if (ipv4_stack and ipv6_stack) else main_ip }}"]
-
-    - name: Set no_proxy
-      import_tasks: no_proxy.yml
-      when:
-        - http_proxy is defined or https_proxy is defined
-        - no_proxy is not defined

roles/kubespray-defaults/tasks/no_proxy.yml

@@ -1,40 +0,0 @@
----
-- name: Set no_proxy to all assigned cluster IPs and hostnames
-  set_fact:
-    # noqa: jinja[spacing]
-    no_proxy_prepare: >-
-      {%- if loadbalancer_apiserver is defined -%}
-      {{ apiserver_loadbalancer_domain_name | default('') }},
-      {{ loadbalancer_apiserver.address | default('') }},
-      {%- endif -%}
-      {%- if no_proxy_exclude_workers | default(false) -%}
-      {% set cluster_or_control_plane = 'kube_control_plane' %}
-      {%- else -%}
-      {% set cluster_or_control_plane = 'k8s_cluster' %}
-      {%- endif -%}
-      {%- for item in (groups[cluster_or_control_plane] + groups['etcd'] | default([]) + groups['calico_rr'] | default([])) | unique -%}
-      {{ hostvars[item]['main_access_ip'] }},
-      {%- if item != hostvars[item].get('ansible_hostname', '') -%}
-      {{ hostvars[item]['ansible_hostname'] }},
-      {{ hostvars[item]['ansible_hostname'] }}.{{ dns_domain }},
-      {%- endif -%}
-      {{ item }},{{ item }}.{{ dns_domain }},
-      {%- endfor -%}
-      {%- if additional_no_proxy is defined -%}
-      {{ additional_no_proxy }},
-      {%- endif -%}
-      127.0.0.1,localhost,{{ kube_service_subnets }},{{ kube_pods_subnets }},svc,svc.{{ dns_domain }}
-  delegate_to: localhost
-  connection: local
-  delegate_facts: true
-  become: false
-  run_once: true
-
-- name: Populates no_proxy to all hosts
-  set_fact:
-    no_proxy: "{{ hostvars.localhost.no_proxy_prepare }}"
-    # noqa: jinja[spacing]
-    proxy_env: "{{ proxy_env | combine({
-        'no_proxy': hostvars.localhost.no_proxy_prepare,
-        'NO_PROXY': hostvars.localhost.no_proxy_prepare
-      }) }}"