ansible-playbooks/roles/ns/tasks/add_record.yml

- block:
  - name: check if item zone is valid
    fail:
      msg: '"{{ item.zone }}" does not seem to be a valid zone'
    when: (item.zone is defined) and ((item.zone != 'root') and (item.zone not in int_zones) or (item.zone is not string))


  - name: construct record parameters
    set_fact:
      ns_zone: "{%- if (item.zone is defined) and (item.zone != 'root') -%}{{ item.zone }}.\
                {%- elif item.zone is not defined and branch is defined -%}{{ branch }}.\
                {%- endif -%}\
                {{ int_tld }}"
      ns_name: "{%- if item.name is defined -%}{{ item.name }}\
        {%- else -%}{{ inventory_hostname }}\
        {%- endif -%}"
      ns_type: "{%- if item.type is defined -%}{{ item.type | upper }}\
        {%- else -%}A\
        {%- endif -%}"
      ns_value: "{%- if item.value is defined -%}{{ item.value }}\
        {%- else -%}{{ ansible_host }}\
        {%- endif -%}"


  - name: set ns_quote
    set_fact:
      ns_quote: "{{ '\"' if ns_type == 'TXT' else '' }}"


  - name: construct full name
    set_fact:
      ns_full_name: '{%- if ns_name != "@" -%}{{ ns_name }}.{%- endif -%}{{ ns_zone }}'


  - name: construct regex part
    set_fact:
      ns_regex_part: '{%- if item.allow_multiple is defined -%}{{ (ns_quote ~ ns_value ~ ns_quote) | regex_escape() }}\.?{%- else -%}{{ "" | string }}{%- endif -%}'


  - name: construct regex
    set_fact:
      ns_regex: '^{{ ns_full_name | regex_escape() }}\s+\d+\s+IN\s+{{ ns_type | regex_escape() }}\s+{{ ns_regex_part }}'


  - name: show debug info
    debug:
      msg: "{{ ns_zone }}  {{ ns_name }}  {{ ns_type }}  {{ ns_quote ~ ns_value ~ ns_quote }}  -->  {{ ns_regex }}"


  - name: query ns zone for a list of entries
    command:
      cmd: "pdnsutil list-zone {{ ns_zone | quote }}"
    register: res
    changed_when: false
    failed_when: res.rc != 0


  - name: enumerate stdout lines to check if an entry already exists
    set_fact:
      ns_exists: "{{ res.stdout_lines | select('search', ns_regex) | list | length > 0 }}"



  # this takes care of situations with wrong record values

  - block:
    - name: fail if there are multiple records
      fail:
        msg: single record is chosen, but multiple records found
      when: res.stdout_lines | select('search', ns_regex) | list | length > 1


    - name: grab the value
      set_fact:
        ns_old_value: "{{ res.stdout_lines | select('search', ns_regex) | map('regex_search', '\\s+(\\S+?)\\.?$', '\\1') | first | join('') }}"


    - name: debug
      debug:
        msg: "{{ ns_old_value }}  <->  {{ ns_quote ~ ns_value ~ ns_quote }}"


    - name: grab diff
      set_fact:
        ns_value_diff: "{{ ns_old_value != (ns_quote ~ ns_value ~ ns_quote) }}"


    - name: check if records table already exists
      include_role:
        name: postgres
      vars:
        function: run_query
        query:
          database: "{{ hostvars['ns']['database']['name'] | mandatory }}"
          text: "DELETE FROM records WHERE \
                         domain_id = (SELECT id FROM domains WHERE name = %s) \
                         AND name = %s AND type = %s AND content = %s"
          positional_args:
            - "{{ ns_zone }}"
            - "{{ ns_full_name }}"
            - "{{ ns_type }}"
            - "{{ ns_old_value }}"
      when: ns_value_diff


    - name: unset ns_exists flag so the record will be added
      set_fact:
        ns_exists: false
      when: ns_value_diff

    when: ns_exists and item.allow_multiple is not defined


  - name: add the record if it is missing
    command:
      cmd: "pdnsutil add-record {{ ns_zone | quote }} {{ ns_name | quote }} {{ ns_type | quote }} {{ ns_value | quote }}"
    register: res
    changed_when: (res.rc == 0) and ("New rrset:" in res.stdout)
    failed_when: res.rc != 0
    when: not ns_exists

  delegate_to: ns