Installs and configures ntp as a client or a server. Attributes are defined via the roles.

Should work on any Red Hat-family or Debian-family Linux distribution.

• ntp[:is_server]

  • Boolean, should be true or false, defaults to false

• ntp[:servers] (applies to NTP Servers and Clients)

  • Array, should be a list of upstream NTP public servers. The NTP protocol works best with at least 3 servers. The NTPD maximum is 7 upstream servers, any more than that and some of them will be ignored by the daemon.

• ntp[:restrictions] (applies to NTP Servers only)

  • Array, should be a list of restrict lines to restrict access to NTP clients on your LAN.

Use the roles to install as a ntp client or ntp server:

Set up the ntp attributes in a role. For example in a ntpclient.rb role applied to all nodes:

name "ntpclient"
default_attributes(
  "ntp" => {
    "servers" => ["time.nist.gov", "time-nw.nist.gov"]
  }
)

Then in an ntpserver.rb role that is applied to NTP servers:

name "ntpserver"
default_attributes(
  "ntp" => {
    "is_server" => "true",
    "servers" => [0.north-america.pool.ntp.org", "2.north-america.pool.ntp.org", "3.north-america.pool.ntp.org", "4.north-america.pool.ntp.org"]
    "restrictions" => ["10.0.0.0 mask 255.0.0.0 nomodify notrap"]
  }
)