---
- name: Force binaries directory for Flatcar Container Linux by Kinvolk
  set_fact:
    bin_dir: "/opt/bin"
  when: ansible_os_family in ["Flatcar", "Flatcar Container Linux by Kinvolk"]
  tags:
    - facts

- name: Set os_family fact for Kylin Linux Advanced Server
  set_fact:
    ansible_os_family: "RedHat"
    ansible_distribution_major_version: "8"
  when: ansible_distribution == "Kylin Linux Advanced Server"
  tags:
    - facts

- name: check if booted with ostree
  stat:
    path: /run/ostree-booted
    get_attributes: no
    get_checksum: no
    get_mime: no
  register: ostree

- name: set is_fedora_coreos
  lineinfile:
    path: /etc/os-release
    line: "VARIANT_ID=coreos"
    state: present
  check_mode: yes
  register: os_variant_coreos
  changed_when: false

- name: set is_fedora_coreos
  set_fact:
    is_fedora_coreos: "{{ ostree.stat.exists and os_variant_coreos is not changed }}"

- name: check resolvconf
  command: which resolvconf
  register: resolvconf
  failed_when: false
  changed_when: false
  check_mode: no

- name: check existence of /etc/resolvconf/resolv.conf.d
  stat:
    path: /etc/resolvconf/resolv.conf.d
    get_attributes: no
    get_checksum: no
    get_mime: no
  failed_when: false
  register: resolvconfd_path

- name: check status of /etc/resolv.conf
  stat:
    path: /etc/resolv.conf
    follow: no
    get_attributes: no
    get_checksum: no
    get_mime: no
  failed_when: false
  register: resolvconf_stat

- block:

    - name: get content of /etc/resolv.conf
      slurp:
        src: /etc/resolv.conf
      register: resolvconf_slurp

    - name: get currently configured nameservers
      set_fact:
        configured_nameservers: "{{ resolvconf_slurp.content | b64decode | regex_findall('\\s*nameserver\\s*(.*)') | ipaddr }}"
      when: resolvconf_slurp.content is defined

  when: resolvconf_stat.stat.exists is defined and resolvconf_stat.stat.exists

- name: NetworkManager | Check if host has NetworkManager
  # noqa 303 Should we use service_facts for this?
  command: systemctl is-active --quiet NetworkManager.service
  register: networkmanager_enabled
  failed_when: false
  changed_when: false
  check_mode: false

- name: check systemd-resolved
  # noqa 303 Should we use service_facts for this?
  command: systemctl is-active systemd-resolved
  register: systemd_resolved_enabled
  failed_when: false
  changed_when: false
  check_mode: no

- name: set default dns if remove_default_searchdomains is false
  set_fact:
    default_searchdomains: ["default.svc.{{ dns_domain }}", "svc.{{ dns_domain }}"]
  when: not remove_default_searchdomains|default()|bool or (remove_default_searchdomains|default()|bool and searchdomains|default([])|length==0)

- name: set dns facts
  set_fact:
    resolvconf: >-
      {%- if resolvconf.rc == 0 and resolvconfd_path.stat.isdir is defined and resolvconfd_path.stat.isdir -%}true{%- else -%}false{%- endif -%}
    bogus_domains: |-
      {% for d in default_searchdomains|default([]) + searchdomains|default([]) -%}
      {{ dns_domain }}.{{ d }}./{{ d }}.{{ d }}./com.{{ d }}./
      {%- endfor %}
    cloud_resolver: "{{ ['169.254.169.254'] if cloud_provider is defined and cloud_provider == 'gce' else
                        ['169.254.169.253'] if cloud_provider is defined and cloud_provider == 'aws' else
                        [] }}"

- name: check if kubelet is configured
  stat:
    path: "{{ kube_config_dir }}/kubelet.env"
    get_attributes: no
    get_checksum: no
    get_mime: no
  register: kubelet_configured
  changed_when: false

- name: check if early DNS configuration stage
  set_fact:
    dns_early: "{{ not kubelet_configured.stat.exists }}"

- name: target resolv.conf files
  set_fact:
    resolvconffile: /etc/resolv.conf
    base: >-
      {%- if resolvconf|bool -%}/etc/resolvconf/resolv.conf.d/base{%- endif -%}
    head: >-
      {%- if resolvconf|bool -%}/etc/resolvconf/resolv.conf.d/head{%- endif -%}
  when: not ansible_os_family in ["Flatcar", "Flatcar Container Linux by Kinvolk"] and not is_fedora_coreos

- name: target temporary resolvconf cloud init file (Flatcar Container Linux by Kinvolk / Fedora CoreOS)
  set_fact:
    resolvconffile: /tmp/resolveconf_cloud_init_conf
  when: ansible_os_family in ["Flatcar", "Flatcar Container Linux by Kinvolk"] or is_fedora_coreos

- name: check if /etc/dhclient.conf exists
  stat:
    path: /etc/dhclient.conf
    get_attributes: no
    get_checksum: no
    get_mime: no
  register: dhclient_stat

- name: target dhclient conf file for /etc/dhclient.conf
  set_fact:
    dhclientconffile: /etc/dhclient.conf
  when: dhclient_stat.stat.exists

- name: check if /etc/dhcp/dhclient.conf exists
  stat:
    path: /etc/dhcp/dhclient.conf
    get_attributes: no
    get_checksum: no
    get_mime: no
  register: dhcp_dhclient_stat

- name: target dhclient conf file for /etc/dhcp/dhclient.conf
  set_fact:
    dhclientconffile: /etc/dhcp/dhclient.conf
  when: dhcp_dhclient_stat.stat.exists

- name: target dhclient hook file for Red Hat family
  set_fact:
    dhclienthookfile: /etc/dhcp/dhclient.d/zdnsupdate.sh
  when: ansible_os_family == "RedHat"

- name: target dhclient hook file for Debian family
  set_fact:
    dhclienthookfile: /etc/dhcp/dhclient-exit-hooks.d/zdnsupdate
  when: ansible_os_family == "Debian"

- name: generate search domains to resolvconf
  set_fact:
    searchentries:
      search {{ (default_searchdomains|default([]) + searchdomains|default([])) | join(' ') }}
    domainentry:
      domain {{ dns_domain }}
    supersede_search:
      supersede domain-search "{{ (default_searchdomains|default([]) + searchdomains|default([])) | join('", "') }}";
    supersede_domain:
      supersede domain-name "{{ dns_domain }}";

- name: pick coredns cluster IP or default resolver
  set_fact:
    coredns_server: |-
      {%- if dns_mode == 'coredns' and not dns_early|bool -%}
        {{ [ skydns_server ] }}
      {%- elif dns_mode == 'coredns_dual' and not dns_early|bool -%}
        {{ [ skydns_server ] + [ skydns_server_secondary ] }}
      {%- elif dns_mode == 'manual' and not dns_early|bool -%}
        {{ ( manual_dns_server.split(',') | list) }}
      {%- elif dns_mode == 'none' and not dns_early|bool -%}
        []
      {%- elif dns_early|bool -%}
        {{ upstream_dns_servers|default([]) }}
      {%- endif -%}

# This task should only run after cluster/nodelocal DNS is up, otherwise all DNS lookups will timeout
- name: generate nameservers for resolvconf, including cluster DNS
  set_fact:
    nameserverentries: |-
      {{ (([nodelocaldns_ip] if enable_nodelocaldns else []) + (coredns_server|d([]) if not enable_nodelocaldns else []) + nameservers|d([]) + cloud_resolver|d([]) + configured_nameservers|d([])) | unique | join(',') }}
    supersede_nameserver:
      supersede domain-name-servers {{ ( ( [nodelocaldns_ip] if enable_nodelocaldns else []) + coredns_server|d([]) + nameservers|d([]) + cloud_resolver|d([])) | unique | join(', ') }};
  when: not dns_early or dns_late

# This task should run instead of the above task when cluster/nodelocal DNS hasn't
# been deployed yet (like scale.yml/cluster.yml) or when it's down (reset.yml)
- name: generate nameservers for resolvconf, not including cluster DNS
  set_fact:
    nameserverentries: |-
      {{ ( nameservers|d([]) + cloud_resolver|d([]) + configured_nameservers|d([])) | unique | join(',') }}
    supersede_nameserver:
      supersede domain-name-servers {{ ( nameservers|d([]) + cloud_resolver|d([])) | unique | join(', ') }};
  when: dns_early and not dns_late

- name: gather os specific variables
  include_vars: "{{ item }}"
  with_first_found:
    - files:
        - "{{ ansible_distribution|lower }}-{{ ansible_distribution_version|lower|replace('/', '_') }}.yml"
        - "{{ ansible_distribution|lower }}-{{ ansible_distribution_release }}.yml"
        - "{{ ansible_distribution|lower }}-{{ ansible_distribution_major_version|lower|replace('/', '_') }}.yml"
        - "{{ ansible_distribution|lower }}.yml"
        - "{{ ansible_os_family|lower }}.yml"
        - defaults.yml
      paths:
        - ../vars
      skip: true

- name: set etcd vars if using kubeadm mode
  set_fact:
    etcd_cert_dir: "{{ kube_cert_dir }}"
    kube_etcd_cacert_file: "etcd/ca.crt"
    kube_etcd_cert_file: "apiserver-etcd-client.crt"
    kube_etcd_key_file: "apiserver-etcd-client.key"
  when:
    - etcd_deployment_type == "kubeadm"

- name: check /usr readonly
  stat:
    path: "/usr"
    get_attributes: no
    get_checksum: no
    get_mime: no
  register: usr

- name: set alternate flexvolume path
  set_fact:
    kubelet_flexvolumes_plugins_dir: /var/lib/kubelet/volumeplugins
  when: not usr.stat.writeable

- block:
    - name: Ensure IPv6DualStack featureGate is set when enable_dual_stack_networks is true
      set_fact:
        kube_feature_gates: "{{ kube_feature_gates + [ 'IPv6DualStack=true' ] }}"
      when:
        - not 'IPv6DualStack=true' in kube_feature_gates

    - name: Ensure IPv6DualStack kubeadm featureGate is set when enable_dual_stack_networks is true
      set_fact:
        kubeadm_feature_gates: "{{ kubeadm_feature_gates + [ 'IPv6DualStack=true' ] }}"
      when:
        - not 'IPv6DualStack=true' in kubeadm_feature_gates
  when:
    - enable_dual_stack_networks
    - kube_version is version('v1.24.0', '<')