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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/guix.texi | 55 |
1 files changed, 54 insertions, 1 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index 057272df46..60703875f6 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -24,7 +24,7 @@ Copyright @copyright{} 2015, 2016, 2017 Leo Famulari@* Copyright @copyright{} 2015, 2016, 2017, 2018 Ricardo Wurmus@* Copyright @copyright{} 2016 Ben Woodcroft@* Copyright @copyright{} 2016, 2017 Chris Marusich@* -Copyright @copyright{} 2016, 2017 Efraim Flashner@* +Copyright @copyright{} 2016, 2017, 2018 Efraim Flashner@* Copyright @copyright{} 2016 John Darrington@* Copyright @copyright{} 2016, 2017 ng0@* Copyright @copyright{} 2016, 2017 Jan Nieuwenhuizen@* @@ -10767,6 +10767,59 @@ make an initial adjustment of more than 1,000 seconds. List of host names used as the default NTP servers. @end defvr +@cindex OpenNTPD +@deffn {Scheme Procedure} openntpd-service-type +Run the @command{ntpd}, the Network Time Protocol (NTP) daemon, as implemented +by @uref{http://www.openntpd.org, OpenNTPD}. The daemon will keep the system +clock synchronized with that of the given servers. + +@example +(service + openntpd-service-type + (openntpd-configuration + (listen-on '("127.0.0.1" "::1")) + (sensor '("udcf0 correction 70000")) + (constraint-from '("www.gnu.org")) + (constraints-from '("https://www.google.com/")) + (allow-large-adjustment? #t))) + +@end example +@end deffn + +@deftp {Data Type} openntpd-configuration +@table @asis +@item @code{openntpd} (default: @code{(file-append openntpd "/sbin/ntpd")}) +The openntpd executable to use. +@item @code{listen-on} (default: @code{'("127.0.0.1" "::1")}) +A list of local IP addresses or hostnames the ntpd daemon should listen on. +@item @code{query-from} (default: @code{'()}) +A list of local IP address the ntpd daemon should use for outgoing queries. +@item @code{sensor} (default: @code{'()}) +Specify a list of timedelta sensor devices ntpd should use. @code{ntpd} +will listen to each sensor that acutally exists and ignore non-existant ones. +See @uref{https://man.openbsd.org/ntpd.conf, upstream documentation} for more +information. +@item @code{server} (default: @var{%ntp-servers}) +Specify a list of IP addresses or hostnames of NTP servers to synchronize to. +@item @code{servers} (default: @code{'()}) +Specify a list of IP addresses or hostnames of NTP pools to synchronize to. +@item @code{constraint-from} (default: @code{'()}) +@code{ntpd} can be configured to query the ‘Date’ from trusted HTTPS servers via TLS. +This time information is not used for precision but acts as an authenticated +constraint, thereby reducing the impact of unauthenticated NTP +man-in-the-middle attacks. +Specify a list of URLs, IP addresses or hostnames of HTTPS servers to provide +a constraint. +@item @code{constraints-from} (default: @code{'()}) +As with constraint from, specify a list of URLs, IP addresses or hostnames of +HTTPS servers to provide a constraint. Should the hostname resolve to multiple +IP addresses, @code{ntpd} will calculate a median constraint from all of them. +@item @code{allow-large-adjustment?} (default: @code{#f}) +Determines if @code{ntpd} is allowed to make an initial adjustment of more +than 180 seconds. +@end table +@end deftp + @cindex inetd @deffn {Scheme variable} inetd-service-type This service runs the @command{inetd} (@pxref{inetd invocation,,, |