nsd

WARNING: 0.2.x is NOT backwards compatiple with 0.1.x

Table of Contents

1. Overview
2. Module Description - What the module does and why it is useful
3. Setup - The basics of getting started with nsd
   • What nsd affects
   • Setup requirements
   • Beginning with nsd
4. Usage - Configuration options and additional functionality
5. Reference - An under-the-hood peek at what the module is doing and how
6. Limitations - OS compatibility, etc.
7. Development - Guide for contributing to the module

Overview

Manage the installation and configuration of NSD (name serve daemon) and zone files.

Module Description

This module allows for the management of all aspects of the NSD configuration file, keys and zonefiles.

Setup

What nsd affects

• Manages configuration the nsd configueration file
• Manages zone data in the zone dir
• dynamicly sets processor count based on installed processes
• can manage nsd control

Setup Requirements

• puppetlabs-stdlib 4.11.0
• icann-tea 0.2.8
• puppetlabs-concat 1.2.0

Beginning with nsd

Install the package an make sure it is enabled and running with default options:

class { '::nsd': }

With some basic configueration

class { '::nsd':
  ip_addresses => ['192.0.2.1'],
  rrl_size     => 1000,
}

and in hiera

nsd::ip_addresses:
- 192.0.2.1
rrl_size: 1000

Usage

Add config with tsig key

class {'::nsd': 
  default_tsig_name: 'test',
  tsigs => {
    'test',=>  {
      'algo' => 'hmac-sha256',
      'data' => 'adsasdasdasd='
    }
  }
}

or with hiera

nsd::default_tsig_name: test
nsd::tsigs:
  test:
    algo: hmac-sha256
    data: adsasdasdasd=

add zone files. zone files are added with sets of common config.

class {'::nsd': 
  remotes => {
    master_v4 => { 'address4' => '192.0.2.1' },
    master_v6 => { 'address6' => '2001:DB8::1' },
    slave     => { 'address4' => '192.0.2.2' },
  }
  zones => {
    'example.com' => {
      'masters' => ['master_v4', 'master_v6']
      'provide_xfrs'  => ['slave'],
    },
    'example.net' => {
      'masters' => ['master_v4', 'master_v6']
      'provide_xfrs'  => ['slave'],
    }
    'example.org' => {
      'masters' => ['master_v4', 'master_v6']
      'provide_xfrs'  => ['slave'],
    }
  }
}

in hiera

nsd::remotes:
  master_v4:
    address4: 192.0.2.1
  master_v6:
    address4: 2001:DB8::1
  slave:
    address4: 192.0.2.2
nsd::zones:
  example.com:
    masters: &id001
    - master_v4
    - master_v6
    provide_xfrs: &id002
    - slave
  example.net:
    masters: *id001
    slave: *id002
  example.org:
    masters: *id001
    slave: *id002

create and as112, please look at the as112 class to see how this works under the hood

  class {'::nsd::as112': }

Reference

• Public Classes
  • nsd
• Private Classes
  • nsd::params
• Private defined types
  • nsd::file
  • nsd::tsig
  • nsd::zone
  • nsd::remote
• Facts
  • 'nsd_version'

Classes

Public Classes

Class: nsd

Guides the basic setup and installation of NSD on your system

Parameters (all optional)

• default_tsig_name (Optional[String], Default: undef): the default tsig to use when fetching zone data. Knot::Tsig[$default_tsig_name] must exist
• default_masters (Array[String], Default: []): Array of Knot::Remote names to use as the default master servers if none are specified in the zone hash
• default_provide_xfrs (Array[String], Default: []): Array of Knot::Remote names to use as the provide_xfr servers if none are specified in the zone hash
• enable (Bool, Default: true): enable or disable the nsd service, config files are still configuered.
• zones: a hash which is passed to create_resoure(nsd::zone, $zones). Default: Empty.
• files (Hash, Default: {}): a hash which is passed to create_resoure(nsd::file, $files).
• tsigs (Hash, Default: {}): a hash which is passed to create_resoure(nsd::tsig, $tsigs)
• remotes (Hash, Default: {}): a hash which is passed to create_resoure(nsd::remote, $remotes)
• logrotate_rotate (Integer, Default: 5): The number of rotated log files to keep on disk.
• logrotate_size (String, Default: 100M): The String size a log file has to reach before it will be rotated. The default units are bytes, append k, M or G for kilobytes, megabytes or gigabytes respectively.
• master (Bool, Default: false: Specify if the server is a master or slave.
• server_template (File Path, Default: 'nsd/etc/nsd/nsd.server.conf.'): template file to use for server config. only change if you know what you are doing.
• zones_template (File Path, Default: 'nsd/etc/nsd/nsd.zones.conf.erb'): template file to use for zone config. only change if you know what you are doing.
• ip_addresses (Array, Default: []): Array of IP addresses to listen on.
• ip_transparent (Bool, Default: false): Allows NSD to bind to non local addresses. This is useful to have NSD listen to IP addresses that are not (yet) added to the network interface, so that it can answer immediately when the address is added.
• reuseport (Bool, Default: false): create file descriptors for every server in the server-count. This improves performance of the network stack.
• identity (String, Default: $::fqdn): A string to specify the identity when asked for CH TXT ID.SERVER
• nsid (String, Default: $::fqdn): A string representing the nsid to add to the EDNS section of the answer when queried with an NSID EDNS enabled packet.
• logfile (File Path, Default: undef): A string to specify the logfile to use.
• server_count (Integer. Default: if $::processorcount < 4 otherwise $::processorcount - 3): Start this many NSD servers.
• tcp_count (Integer, Default: 250): The maximum number of concurrent, active TCP connections by each server. valid options: Integer.
• tcp_query_count (Integer, Default: 0 (unlimited): The maximum number of queries served on a single TCP connection.
• tcp_timeout (Integer, Default: undef): Overrides the default TCP timeout.
• ipv4_edns_size (Integer < 4097, Default: 4096): Preferred EDNS buffer size for IPv4.
• ipv6_edns_size (Integer < 4097, Default: 4096): Preferred EDNS buffer size for IPv6.
• pidfile (File Path, Default: OS Specific): Use the pid file.
• port (Integer < 65536, Default: 53): Port to listen on.
• statistics (Integer, Default: undef): If not present no statistics are dumped. Statistics are produced every number seconds.
• chroot (File Path, Default: undef): NSD will chroot on startup to the specified directory. (untested)
• username (String, Default: nsd): After binding the socket, drop user privileges and assume the username.
• zonesdir (File Path, Default: OS Specific): The data directory
• difffile: Ignored, for compatibility with NSD3 config files. Default: undef
• xfrdfile: The soa timeout and zone transfer daemon in NSD will save its. Valid options: valid absolute path. Default: OS Specific
• xfrd_reload_timeout: If this value is -1, xfrd will not trigger a reload after a zone transfer. If positive xfrd will trigger a reload after a zone transfer, then it will wait for the number of seconds before it will trigger a new reload. Setting this value throttles the reloads to once per the number of seconds. Valid options: Integer. Default: 1
• verbosity: This value specifies the verbosity level for (non-debug) logging. Default is 0. 1 gives more information about incoming notifies and zone transfers. 2 lists soft warnings that are encountered. 3 prints more information. Valid options: Integer < 3. Default: 0
• hide_version: Prevent NSD from replying with the version string on CHAOS class queries. Valid Optional: bool. Default: false
• rrl_size: This option gives the size of the hashtable. Valid Optional Integer. Default: 1000000
• rrl_ratelimit (Integer, Default:200): The max qps allowed.
• rrl_slip (Integer=2): This option controls the number of packets discarded before we send back a SLIP response
• rrl_ipv4_prefix_length (Integer < 33, Default: 24): IPv4 prefix length. Addresses are grouped by netblock.
• rrl_ipv6_prefix_length (Integer < 129, Default: 64): IPv6 prefix length. Addresses are grouped by netblock.
• rrl_whitelist_ratelimit (Integer, Default: 4000): The max qps for query sorts for a source, which have been whitelisted.
• control_enable (Bool, Default: false): Enable remote control
• control_interface (Array, Default: undef): the interfaces for remote control service
• control_port (Integer < 65536, Default: 8952): the port number for remote control service
• server_key_file (file path, Default: OS Specific): path to server private key
• server_cert_file (file path, Default: OS Specific): path to self signed certificate
• client_key_file (file path, Default: OS Specific): path to client private key
• client_cert_file (file path, Default: OS Specific): path to cient certificate
• init (String, Default: OS Specific): service provider to use
• database (File Path, Default: OS Specific): The specified file is u The specified file is
• nsd_package_name (String, Default: OS Specific): The package to install
• nsd_service_name (String, Default: OS Specific): The service to manage
• zone_subdir (File Path, Default: OS Specific): The zone directory
• nsd_conf_file (File Path, Default: OS Specific): The config file
• includes (Array[String[1]], Default: []): Array of file paths, that are included into nsd config. Inclusion happens second to last, before zone definitions.

Private Classes

Class nsd::params

Set os specific parameters

Private Defined Types

Defined nsd::file

Manage files used by nsd

Parameters

• owner (String: Default root): the owner of the file
• group (String: Default nsd): the group of the file
• mode (String /^\d+$/: Default '0640'): the mode of the file
• source (File Path: Default undef): the source location of the file
• content (File Path: Default undef): the content location of the file
• ensure (File Path: Default 'present'): how to ensure the file

Defined nsd::tsig

Manage tsig keys used by nsd

Parameters

• algo (String '^hmac-sha(1|224|256|384|512)$' or '^hmac-md5$', Default: 'hmac-sha256' ): The tsig algorithem of the key
• data (String, Required: true): The tsig key information
• template (Path, Default: 'nsd/etc/nsd/nsd.key.conf.erb'): template to use for tsig config

Defined nsd::zone

Manage a zone set conifg for nsd

Parameters

• masters (Array[String], Default: []): List of nsd::remote keys to configure as masters
• provide_xfr (Array[String], Default: []): List of nsd::remote keys to configure as slave servers
• allow_notify_additions (Array[String], Default: []): List of nsd::remote keys to configure to allow anotifies
• send_notify_additions (Array[String], Default: []): List of nsd::remote keys to configure to also recive notifies
• zonefile (String, Default: undef): zonefile name, (will be used for all zones)
• zone_dir (File Path, Default: undef): override default zone path

Defined nsd::remote

used to define remote serveres these are used later to configure the system

Parameters

• address4 (Optional[Variant[Tea::Ipv4, Tea::Ipv4_cidr]]): ipv4 address or prefix for this remote
• address6 (Optional[Variant[Tea::Ipv6, Tea::Ipv6_cidr]]): ipv6 address or prefix for this remote
• tsig_name: (Optional[String]): nsd::tsig to use
• port: (Tea::Port, Default: 53): port use to talk to remote.

Facts

Fact nsd_version

Determins the version of nsd by parsing the output of nsd -v

Limitations

This module has been tested on:

• Ubuntu 12.04, 14.04, Ubuntu 16.04
• FreeBSD 10

Development

Pull requests welcome but please also update documentation and tests.