34d0c5c676
Change additional dnsmasq opts: - Adjust caching size and TTL - Disable resolve conf to not create loops - Change dnsPolicy to default (similarly to kubedns's dnsmasq). The ClusterFirst should not be used to not create loops - Disable negative NXDOMAIN replies to be cached - Make its very installation as optional step (enabled by default). If you don't want more than 3 DNS servers, including 1 for K8s, disable it. - Add docs and a drawing to clarify DNS setup. - Fix stdout logs for dnsmasq/kubedns app configs - Add missed notifies to resolvconf -u handler - Fix idempotency of resolvconf head file changes Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
100 lines
2.7 KiB
YAML
100 lines
2.7 KiB
YAML
---
|
|
- name: check resolvconf
|
|
shell: which resolvconf
|
|
register: resolvconf
|
|
ignore_errors: yes
|
|
|
|
- name: target resolv.conf file
|
|
set_fact:
|
|
resolvconffile: >-
|
|
{%- if resolvconf.rc == 0 -%}/etc/resolvconf/resolv.conf.d/head{%- else -%}/etc/resolv.conf{%- endif -%}
|
|
|
|
- name: generate search domains to resolvconf
|
|
set_fact:
|
|
searchentries:
|
|
"{{ ([ 'default.svc.' + dns_domain, 'svc.' + dns_domain ] + searchdomains|default([])) | join(' ') }}"
|
|
|
|
- name: pick dnsmasq cluster IP
|
|
set_fact:
|
|
dnsmasq_server: >-
|
|
{%- if skip_dnsmasq|bool -%}{{ [ skydns_server ] + upstream_dns_servers|default([]) }}{%- else -%}{{ [ dns_server ] }}{%- endif -%}
|
|
|
|
- name: generate nameservers to resolvconf
|
|
set_fact:
|
|
nameserverentries:
|
|
"{{ nameservers|default([]) + dnsmasq_server|default([]) }}"
|
|
|
|
- name: Remove search and nameserver options from resolvconf head
|
|
lineinfile:
|
|
dest: /etc/resolvconf/resolv.conf.d/head
|
|
state: absent
|
|
regexp: "^{{ item }}.*$"
|
|
backup: yes
|
|
follow: yes
|
|
with_items:
|
|
- search
|
|
- nameserver
|
|
when: resolvconf.rc == 0
|
|
notify: Dnsmasq | update resolvconf
|
|
|
|
- name: Add search resolv.conf
|
|
lineinfile:
|
|
line: "search {{searchentries}}"
|
|
dest: "{{resolvconffile}}"
|
|
state: present
|
|
insertbefore: BOF
|
|
backup: yes
|
|
follow: yes
|
|
notify: Dnsmasq | update resolvconf
|
|
|
|
- name: Add local dnsmasq to resolv.conf
|
|
blockinfile:
|
|
dest: "{{resolvconffile}}"
|
|
block: |-
|
|
{% for item in nameserverentries -%}
|
|
nameserver {{ item }}
|
|
{% endfor %}
|
|
state: present
|
|
insertafter: "^search.*$"
|
|
create: yes
|
|
backup: yes
|
|
follow: yes
|
|
marker: "# Ansible nameservers {mark}"
|
|
notify: Dnsmasq | update resolvconf
|
|
|
|
- name: Add options to resolv.conf
|
|
lineinfile:
|
|
line: options {{ item }}
|
|
dest: "{{resolvconffile}}"
|
|
state: present
|
|
regexp: "^options.*{{ item }}$"
|
|
insertafter: EOF
|
|
backup: yes
|
|
follow: yes
|
|
with_items:
|
|
- timeout:2
|
|
- attempts:2
|
|
notify: Dnsmasq | update resolvconf
|
|
|
|
- name: Remove search and nameserver options from resolvconf base
|
|
lineinfile:
|
|
dest: /etc/resolvconf/resolv.conf.d/base
|
|
state: absent
|
|
regexp: "^{{ item }}.*$"
|
|
backup: yes
|
|
follow: yes
|
|
with_items:
|
|
- search
|
|
- nameserver
|
|
when: resolvconf.rc == 0
|
|
notify: Dnsmasq | update resolvconf
|
|
|
|
- name: disable resolv.conf modification by dhclient
|
|
copy: src=dhclient_nodnsupdate dest=/etc/dhcp/dhclient-enter-hooks.d/znodnsupdate mode=0755
|
|
notify: Dnsmasq | restart network
|
|
when: ansible_os_family == "Debian"
|
|
|
|
- name: disable resolv.conf modification by dhclient
|
|
copy: src=dhclient_nodnsupdate dest=/etc/dhcp/dhclient.d/nodnsupdate mode=u+x
|
|
notify: Dnsmasq | restart network
|
|
when: ansible_os_family == "RedHat"
|