c12s-kubespray/roles/kubernetes/preinstall/tasks/set_resolv_facts.yml

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---
- name: check resolvconf
shell: which resolvconf
register: resolvconf
ignore_errors: yes
changed_when: false
- set_fact:
resolvconf: >-
{%- if resolvconf.rc == 0 -%}true{%- else -%}false{%- endif -%}
- set_fact:
private_domains: |-
{% for d in [ 'default.svc.' + dns_domain, 'svc.' + dns_domain ] + searchdomains|default([]) -%}
{{dns_domain}}.{{d}}./{{d}}.{{d}}./com.{{d}}./
{%- endfor %}
default_resolver: >-
{%- if cloud_provider is defined and cloud_provider == 'gce' -%}169.254.169.254{%- else -%}8.8.8.8{%- endif -%}
- name: check kubelet
stat:
path: "{{ bin_dir }}/kubelet"
register: kubelet
changed_when: false
- name: check if early DNS configuration stage
set_fact:
dns_early: >-
{%- if kubelet.stat.exists -%}false{%- else -%}true{%- endif -%}
- 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: ansible_os_family != "CoreOS"
- name: target temporary resolvconf cloud init file (CoreOS)
set_fact: resolvconffile=/tmp/resolveconf_cloud_init_conf
when: ansible_os_family == "CoreOS"
- name: target dhclient conf/hook files for Red Hat family
set_fact:
dhclientconffile: /etc/dhclient.conf
dhclienthookfile: /etc/dhcp/dhclient.d/zdnsupdate.sh
when: ansible_os_family == "RedHat"
- name: target dhclient conf/hook files for Debian family
set_fact:
dhclientconffile: /etc/dhcp/dhclient.conf
dhclienthookfile: /etc/dhcp/dhclient-exit-hooks.d/zdnsupdate
when: ansible_os_family == "Debian"
- name: generate search domains to resolvconf
set_fact:
searchentries:
search {{ ([ 'default.svc.' + dns_domain, 'svc.' + dns_domain ] + searchdomains|default([])) | join(' ') }}
domainentry:
domain {{ dns_domain }}
supersede_search:
supersede domain-search "{{ ([ 'default.svc.' + dns_domain, 'svc.' + dns_domain ] + searchdomains|default([])) | join('", "') }}";
supersede_domain:
supersede domain-name "{{ dns_domain }}";
- name: decide on dns server IP
set_fact:
dns_server_real: >-
{%- if dns_early|bool -%}{{default_resolver}}{%- else -%}{{dns_server}}{%- endif -%}
- name: pick dnsmasq cluster IP or default resolver
set_fact:
dnsmasq_server: |-
{%- if skip_dnsmasq|bool and not dns_early|bool -%}
{{ [ skydns_server ] + upstream_dns_servers|default([]) }}
{%- elif dns_early|bool -%}
{{ [ dns_server_real ] + upstream_dns_servers|default([]) }}
{%- else -%}
{{ [ dns_server ] }}
{%- endif -%}
- name: generate nameservers to resolvconf
set_fact:
nameserverentries:
nameserver {{( dnsmasq_server|default([]) + nameservers|default([])) | join(',nameserver ')}}
prepend_nameserver:
prepend domain-name-servers {{( dnsmasq_server|default([]) + nameservers|default([])) | join(', ') }};