NSD

Install and configure NSD (dns) server.re.

Requirements

ansible version minimal is 2.3
role hudecof.filter-plugins adds some jinja filters
for RedHat based distribution EPEL repository is needed

Role Variables

All default variables are defined in the defaults/main.yml.

OS specific variables are in vars/os-.yml with __ prefix. See defaults which could be overwritten.

General

nsd_service_state define service state, defaults to started
nsd_service_enabled define service enable state, defaults to yes
nsd_backup define wheather create config backup files, defaults to False
nsd_test dfine, whearther the role is in testing mode, defaults to False

OS spececific

nsd_packages list of packages to install/remove, defaults to __nsd_packages
nsd_user usename to run service under, defaults to __nsd_user
nsd_group group name to run service under, defaults to __nsd_group
nsd_service service name, defaults to __nsd_service
nsd_dir_etc configuration directory, defaults to __nsd_dir_etc
nsd_dir_db database directory, defaults to __nsd_dir_db
nsd_dir_run pid file directory, defaults to __nsd_dir_run
nsd_dir_state state directory, defaults to __nsd_dir_state
nsd_bin_control_setup path to binary nsd-control-setup
nsd_bin_check_conf path to binary nsd-checkconf

Server Configuration

I will provide sample configuration. The dictionaty keys are configuration parameters for the NSD, so please see nsd.conf(5) maunal page.

nsd_conf_keys:
  test:
    algorithm: hmac-sha256
    secret: aaaaaabbbbbbccccccdddddd

nsd_conf_zones:
  example.com:
    include-pattern: test

nsd_conf_patterns:
  test:
    'zonefile': 'zones.d/%s'
    'provide-xfr': ['0.0.0.0/0 test', '::0/0 test']

nsd_conf_server:
  'username': "{{ nsd_user }}"
  'do-ip4': 'yes'
  'do-ip6': 'no'
  'hide-version': 'yes'
  'zonesdir': "{{ nsd_dir_etc }}"
  'database': "{{ nsd_dir_db }}/nsd.db"
  'pidfile': "{{ nsd_dir_run }}/nsd.pid"
  'xfrdfile': "{{ nsd_dir_state }}/xfrd.state"
  'verbosity': 0
  'ip-address': ['127.0.0.1']

To override onl part of the config you could use small trick with combine filter plugin.

nsd_conf_server_base:
  'username': "{{ nsd_user }}"
  'do-ip4': 'yes'
  'do-ip6': 'no'
  'hide-version': 'yes'
  'zonesdir': "{{ nsd_dir_etc }}"
  'database': "{{ nsd_dir_db }}/nsd.db"
  'pidfile': "{{ nsd_dir_run }}/nsd.pid"
  'xfrdfile': "{{ nsd_dir_state }}/xfrd.state"
  'verbosity': 0
  'ip-address': "{{ ansible_all_ipv4_addresses }} + {{ ['127.0.0.1'] }}"

nsd_conf_server_host: {}

nsd_conf_server: "{{ nsd_conf_server_base|combine(nsd_conf_server_host) }}"

Dependencies

  roles:
    - role: hudecof.packages
      packages_centos_epel: True
      packages_ubuntu_multiverse: True
      packages_ubuntu_universe: True
    - role: hudecof.filter_plugins

Example Playbook

Including an example of how to use your role (for instance, with variables passed in as parameters) is always nice for users too:

- hosts: servers
  roles:
    - role: hudecof.packages
      packages_centos_epel: True
      packages_ubuntu_multiverse: True
      packages_ubuntu_universe: True
    - role: hudecof.filter_plugins
    - role: hudecof.nsd
      nsd_conf_keys:
        test:
          algorithm: hmac-sha256
          secret: aaaaaabbbbbbccccccdddddd
      nsd_conf_zones:
        example.com:
          include-pattern: test
      nsd_conf_patterns:
        test:
          'zonefile': 'zones.d/%s'
         'provide-xfr': ['0.0.0.0/0 test', '::0/0 test']
      nsd_conf_server:
        'username': "{{ nsd_user }}"
        'do-ip4': 'yes'
        'do-ip6': 'no'
        'hide-version': 'yes'
        'zonesdir': "{{ nsd_dir_etc }}"
        'database': "{{ nsd_dir_db }}/nsd.db"
        'pidfile': "{{ nsd_dir_run }}/nsd.pid"
        'xfrdfile': "{{ nsd_dir_state }}/xfrd.state"
        'verbosity': 0
        'ip-address': ['127.0.0.1']

License

BSD

Author Information

Peter Hudec

hudecof/ansible_nsd

NSD