NTP (Network Time Protocol)

Installation

apt install ntp

Konfiguration

# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help

# This file is managed by Salt, do not edit.

driftfile /var/lib/ntp/ntp.drift

# Enable this if you want statistics to be logged.
#statsdir /var/log/ntpstats/

statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable

# Specify one or more NTP servers.

# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board
# on 2011-02-08 (LP: #104525). See http://www.pool.ntp.org/join.html for
# more information.
pool 0.ubuntu.pool.ntp.org iburst
pool 1.ubuntu.pool.ntp.org iburst
pool 2.ubuntu.pool.ntp.org iburst
pool 3.ubuntu.pool.ntp.org iburst

# Use Ubuntu's ntp server as a fallback.
pool ntp.ubuntu.com

# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for
# details.  The web page <http://support.ntp.org/bin/view/Support/AccessRestrictions>
# might also be helpful.
#
# Note that "restrict" applies to both servers and clients, so a configuration
# that might be intended to block requests from certain clients could also end
# up blocking replies from your own upstream servers.

# By default, exchange time with everybody, but don't allow configuration.
restrict -4 default kod notrap nomodify nopeer noquery limited
restrict -6 default kod notrap nomodify nopeer noquery limited

# Local users may interrogate the ntp server more closely.
restrict 127.0.0.1
restrict ::1

# Needed for adding pool entries
restrict source notrap nomodify noquery

# Clients from this (example!) subnet have unlimited access, but only if
# cryptographically authenticated.
#restrict 192.168.123.0 mask 255.255.255.0 notrust


# If you want to provide time to your local subnet, change the next line.
# (Again, the address is an example only.)
#broadcast 192.168.123.255

# If you want to listen to time broadcasts on your local subnet, de-comment the
# next lines.  Please do this only if you trust everybody on the network!
#disable auth
#broadcastclient

#Changes recquired to use pps synchonisation as explained in documentation:
#http://www.ntp.org/ntpfaq/NTP-s-config-adv.htm#AEN3918

#server 127.127.8.1 mode 135 prefer    # Meinberg GPS167 with PPS
#fudge 127.127.8.1 time1 0.0042        # relative to PPS for my hardware

#server 127.127.22.1                   # ATOM(PPS)
#fudge 127.127.22.1 flag3 1            # enable PPS API

Todo: Konfigurationsdatei anpassen, Deutsche Pool Server? VM Shift?

Salt State File

ntp.sls

# NTP (Network Time Protocol)

{% set ntp = salt['grains.filter_by']({
  'Debian': {'pkg': 'ntp', 'srv': 'ntp'}
}, default='Debian') %}

{{ ntp.pkg }}:
  pkg.installed:
    - name: {{ ntp.pkg }}
  service.enabled:
    - name: {{ ntp.srv }}
    # - enable: True # Trigger error
    # - watch:
    #   - file: /etc/ntp.conf
    # - unless: test -f /var/run/ntpd.pid
    # - require:
    #   - pkg: {{ ntp.pkg }}

/etc/ntp.conf:
  file.managed:
    - name: /etc/ntp.conf
    - source: salt://gateway/etc/ntp.conf
    - user: root
    - group: root
    - mode: 644
    - require:
      - pkg: {{ ntp.pkg }}
    - listen_in:
      - service: {{ ntp.srv }}

# Show Status: ntpq -p