ntp

Table of Contents

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

Module description

The ntp module installs, configures, and manages the NTP service across a range of operating systems and distributions.

Setup

Beginning with ntp

include '::ntp' is enough to get you up and running. To pass in parameters specifying which servers to use:

class { '::ntp':
  servers => [ 'ntp1.corp.com', 'ntp2.corp.com' ],
}

Usage

All parameters for the ntp module are contained within the main ::ntp class, so for any function of the module, set the options you want. See the common usages below for examples

Install and enable NTP

include '::ntp'

Change NTP servers

class { '::ntp':
  servers => [ 'ntp1.corp.com', 'ntp2.corp.com' ],
}

Restrict who can connect

class { '::ntp':
  servers  => [ 'ntp1.corp.com', 'ntp2.corp.com' ],
  restrict => ['127.0.0.1'],
}

Install a client that can't be queried

class { '::ntp':
  servers   => ['ntp1.corp.com', 'ntp2.corp.com'],
  restrict  => [
    'default ignore',
    '-6 default ignore',
    '127.0.0.1',
    '-6 ::1',
    'ntp1.corp.com nomodify notrap nopeer noquery',
    'ntp2.corp.com nomodify notrap nopeer noquery'
  ],
}

Listen on specific interfaces

Restricting NTP to a specific interface is especially useful on Openstack node, which may have numerous virtual interfaces.

class { '::ntp':
  servers  => [ 'ntp1.corp.com', 'ntp2.corp.com' ],
  interfaces => ['127.0.0.1', '1.2.3.4']
}

Opt out of Puppet controlling the service

class { '::ntp':
  servers        => [ 'ntp1.corp.com', 'ntp2.corp.com' ],
  restrict       => ['127.0.0.1'],
  service_manage => false,
}

Configure and run ntp without installing

class { '::ntp':
  package_manage => false,
}

Pass in a custom template

class { '::ntp':
  servers         => [ 'ntp1.corp.com', 'ntp2.corp.com' ],
  restrict        => ['127.0.0.1'],
  service_manage  => false,
  config_epp      => 'different/module/custom.template.epp',
}

Reference

Classes

Public classes

• ntp: Main class, includes all other classes.

Private classes

• ntp::install: Handles the packages.
• ntp::config: Handles the configuration file.
• ntp::service: Handles the service.

Parameters

The following parameters are available in the ::ntp class:

broadcastclient

Boolean. Enables reception of broadcast server messages to any local interface.

config

Stdlib::Absolutepath. Specifies a file for NTP's configuration info. Default value: '/etc/ntp.conf' (or '/etc/inet/ntp.conf' on Solaris)

config_dir

Optional. Stdlib::Absolutepath. Specifies a directory for the NTP configuration files. Default value: undef

####config_file_mode

String. Specifies a file mode for the ntp configuration file. Default value: '0664'.

config_template

Optional. String. Specifies an absolute or relative file path to an ERB template for the config file. Example value: 'ntp/ntp.conf.erb'. A validation error is thrown if both this and the config_epp parameter are specified.

config_epp

Optional. String. Specifies an absolute or relative file path to an EPP template for the config file. Example value: 'ntp/ntp.conf.epp'. A validation error is thrown if both this and the config_template parameter are specified.

disable_auth

Boolean. Disables cryptographic authentication for broadcast client, multicast client, and symmetric passive associations.

disable_dhclient

Boolean. Disables ntp-servers in dhclient.conf to prevent Dhclient from managing the NTP configuration.

disable_kernel

Boolean. Disables kernel time discipline.

disable_monitor

Boolean. Disables the monitoring facility in NTP. Default value: true.

driftfile

Stdlib::Absolutepath. Specifies an NTP driftfile. Default value: '/var/lib/ntp/drift' (except on AIX and Solaris).

fudge

Optional. Array[String]. Provides additional information for individual clock drivers. Default value: [ ]

iburst_enable

Boolean. Specifies whether to enable the iburst option for every NTP peer. Default value: false (true on AIX and Debian).

interfaces

Array[String]. Specifies one or more network interfaces for NTP to listen on. Default value: [ ]

interfaces_ignore

Array[String]. Specifies one or more ignore pattern for the NTP listener configuration (for example: all, wildcard, ipv6). Default value: [ ].

keys

Array[String]. Distributes keys to keys file. Default value: [ ]

keys_controlkey

Optional. Ntp::Key_id. Specifies the key identifier to use with the ntpq utility. Value in the range of 1 to 65,534 inclusive. Default value: ' '

keys_enable

Boolean. Whether to enable key-based authentication. Default value: false.

keys_file

Stdlib::Absolutepath. Specifies the complete path and location of the MD5 key file containing the keys and key identifiers used by ntpd, ntpq and ntpdc when operating with symmetric key cryptography. Default value: /etc/ntp.keys (on RedHat and Amazon, /etc/ntp/keys).

keys_requestkey

Optional. Ntp::Key_id. Specifies the key identifier to use with the ntpdc utility program. Value in the range of 1 to 65,534 inclusive. Default value: ' '

keys_trusted:

Optional. Array[Ntp::Key_id]. Provides one or more keys to be trusted by NTP. Default value: [ ].

leapfile

Optional. Stdlib::Absolutepath. Specifies a leap second file for NTP to use. Default value: ' '.

logfile

Optional. Stdlib::Absolutepath. Specifies a log file for NTP to use instead of syslog. Default value: ' '.

minpoll

Optional. Ntp::Poll_interval. Sets Puppet to non-standard minimal poll interval of upstream servers. Values: 3 to 16. Default: undef.

maxpoll

Optional. Ntp::Poll_interval. Sets use non-standard maximal poll interval of upstream servers. Values: 3 to 16. Default option: undef, except on FreeBSD (on FreeBSD, defaults to 9).

ntpsigndsocket

Optional. Stdlib::Absolutepath. Sets NTP to sign packets using the socket in the ntpsigndsocket path. Requires NTP to be configured to sign sockets. Value: Path to the socket directory; for example, for Samba: usr/local/samba/var/lib/ntp_signd/. Default value: undef.

package_ensure

String. Whether to install the NTP package, and what version to install. Values: 'present', 'latest', or a specific version number. Default value: 'present'.

package_manage

Boolean. Whether to manage the NTP package. Default value: true.

package_name

Array[String]. Specifies the NTP package to manage. Default value: ['ntp'] (except on AIX and Solaris).

panic

Optional. Integer[0]. Whether NTP should "panic" in the event of a very large clock skew. Applies only if tinker option set to true or if your environment is in a virtual machine. Default value: 0 if environment is virtual, undef in all other cases.

peers

Array[String]. List of NTP servers with which to synchronise the local clock.

preferred_servers

Array[String]. Specifies one or more preferred peers. Puppet appends 'prefer' to each matching item in the servers array. Default value: [ ].

restrict

Array[String]. Specifies one or more restrict options for the NTP configuration. Puppet prefixes each item with 'restrict', so you need to list only the content of the restriction. Default value for most operating systems:

[
  'default kod nomodify notrap nopeer noquery',
  '-6 default kod nomodify notrap nopeer noquery',
  '127.0.0.1',
  '-6 ::1',
]

Default value for AIX systems:

[
  'default nomodify notrap nopeer noquery',
  '127.0.0.1',
]

servers

Array[String]. Specifies one or more servers to be used as NTP peers. Default value: varies by operating system

service_enable

Boolean. Whether to enable the NTP service at boot. Default value: true.

service_ensure

String. Whether the NTP service should be running. Values: 'running' or 'stopped'. Default value: 'running'.

service_manage

Boolean. Whether to manage the NTP service. Default value: true.

service_name

String. The NTP service to manage. Default value: varies by operating system.

service_provider

String. Which service provider to use for NTP. Default value: 'undef'.

step_tickers_file

Optional. Stdlib::Absolutepath. Location of the step tickers file on the managed system. Default value: varies by operating system.

####step_tickers_epp

Optional. String. Location of the step tickers EPP template file. Default value: varies by operating system. Validation error is thrown if both this and the step_tickers_template parameters are specified.

step_tickers_template

Optional. String. Location of the step tickers ERB template file. Default value: varies by operating system. Validation error is thrown if both this and the step_tickers_epp parameter are specified.

stepout

Optional. Integer[0, 65535]. Value for stepout if tinker value is true. Valid options: unsigned shortint digit. Default value: undef.

tos

Boolean. Whether to enable tos options. Default value: false.

tos_minclock

Optional. Integer[1]. Specifies the minclock tos option. Default value: 3.

tos_minsane

Optional. Integer[1]. Specifies the minsane tos option. Default value: 1.

tos_floor

Optional. Integer[1]. Specifies the floor tos option. Default value: 1.

tos_ceiling

Optional. Integer[1]. Specifies the ceiling tos option. Default value: 15.

tos_cohort

Variant. Boolean, Integer[0,1]. Specifies the cohort tos option. Valid options: 0 or 1. Default value: 0.

tinker

Boolean. Whether to enable tinker options. Default value: false.

udlc

Boolean. Specifies whether to configure NTP to use the undisciplined local clock as a time source. Default value: false.

udlc_stratum

Optional. Integer[1,15]. Specifies the stratum the server should operate at when using the undisciplined local clock as the time source. This value should be set to no less than 10 if ntpd might be accessible outside your immediate, controlled network. Default value: 10.

Limitations

This module has been tested on all PE-supported platforms. Additionally, it is tested (but not supported) on Solaris 10 and Fedora 20-22.

Development

Puppet modules on the Puppet Forge are open projects, and community contributions are essential for keeping them great. Please follow our guidelines when contributing changes.

For more information, see our module contribution guide.

Contributors

To see who's already involved, see the list of contributors.