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-rw-r--r--doc/guix.texi42
1 files changed, 37 insertions, 5 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 84f2c1558a..9101aafda1 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -48,7 +48,7 @@ Copyright @copyright{} 2017 humanitiesNerd@*
Copyright @copyright{} 2017 Christopher Allan Webber@*
Copyright @copyright{} 2017, 2018 Marius Bakke@*
Copyright @copyright{} 2017 Hartmut Goebel@*
-Copyright @copyright{} 2017 Maxim Cournoyer@*
+Copyright @copyright{} 2017, 2019 Maxim Cournoyer@*
Copyright @copyright{} 2017, 2018, 2019 Tobias Geerinckx-Rice@*
Copyright @copyright{} 2017 George Clemmer@*
Copyright @copyright{} 2017 Andy Wingo@*
@@ -13048,8 +13048,9 @@ This is the data type for the NTP service configuration.
@table @asis
@item @code{servers} (default: @code{%ntp-servers})
-This is the list of servers (host names) with which @command{ntpd} will be
-synchronized.
+This is the list of servers (@code{<ntp-server>} records) with which
+@command{ntpd} will be synchronized. See the @code{ntp-server} data type
+definition below.
@item @code{allow-large-adjustment?} (default: @code{#t})
This determines whether @command{ntpd} is allowed to make an initial
@@ -13065,6 +13066,32 @@ List of host names used as the default NTP servers. These are servers of the
@uref{https://www.ntppool.org/en/, NTP Pool Project}.
@end defvr
+@deftp {Data Type} ntp-server
+The data type representing the configuration of a NTP server.
+
+@table @asis
+@item @code{type} (default: @code{'server})
+The type of the NTP server, given as a symbol. One of @code{'pool},
+@code{'server}, @code{'peer}, @code{'broadcast} or @code{'manycastclient}.
+
+@item @code{address}
+The address of the server, as a string.
+
+@item @code{options}
+NTPD options to use with that specific server, given as a list of option names
+and/or of option names and values tuples. The following example define a server
+to use with the options @option{iburst} and @option{prefer}, as well as
+@option{version} 3 and a @option{maxpoll} time of 16 seconds.
+
+@example
+(ntp-server
+ (type 'server)
+ (address "some.ntp.server.org")
+ (options `(iburst (version 3) (maxpoll 16) prefer))))
+@end example
+@end table
+@end deftp
+
@cindex OpenNTPD
@deffn {Scheme Procedure} openntpd-service-type
Run the @command{ntpd}, the Network Time Protocol (NTP) daemon, as implemented
@@ -13084,6 +13111,11 @@ clock synchronized with that of the given servers.
@end lisp
@end deffn
+@defvr {Scheme Variable} %openntpd-servers
+This variable is a list of the server addresses defined in
+@var{%ntp-servers}.
+@end defvr
+
@deftp {Data Type} openntpd-configuration
@table @asis
@item @code{openntpd} (default: @code{(file-append openntpd "/sbin/ntpd")})
@@ -13097,9 +13129,9 @@ Specify a list of timedelta sensor devices ntpd should use. @code{ntpd}
will listen to each sensor that actually exists and ignore non-existent ones.
See @uref{https://man.openbsd.org/ntpd.conf, upstream documentation} for more
information.
-@item @code{server} (default: @var{%ntp-servers})
+@item @code{server} (default: @code{'()})
Specify a list of IP addresses or hostnames of NTP servers to synchronize to.
-@item @code{servers} (default: @code{'()})
+@item @code{servers} (default: @var{%openntp-servers})
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.