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conf: add better support for fragmented configuration

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Add a confdirs directive to include *.conf files from multiple
directories. If a file with the same name exists in multiple
directories, only the first one in the order of the specified
directories will be included.
This commit is contained in:
Miroslav Lichvar
2020-05-07 13:04:26 +02:00
parent 6901df5c18
commit 3470ab66f0
2 changed files with 106 additions and 12 deletions
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37
doc/chrony.conf.adoc
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@@ -2121,6 +2121,32 @@ sendmail binary.
=== Miscellaneous
[[confdirs]]*confdirs* _directory_...::
The *confdirs* directive includes configuration files with the _.conf_ suffix
from up to 10 directories. The files are included in the lexicographical order
(ignoring the names of the directories). If multiple directories contain a file
with the same name, only the first file in the order of the specified
directories will be included. This enables a fragmented configuration, where
existing fragments can be replaced by adding files to a different directory.
+
An example of the directive is:
+
----
confdirs @SYSCONFDIR@/chrony.d /var/run/chrony.d /usr/lib/chrony.d
----
[[include]]*include* _pattern_::
The *include* directive includes a configuration file, or multiple configuration
files if a wildcard pattern is specified. Unlike with the *confdirs* directive,
the full name of the files needs to be specified and at least one file is
required to exist.
+
An example of the directive is:
+
----
include @SYSCONFDIR@/chrony.d/*.conf
----
[[hwtimestamp]]*hwtimestamp* _interface_ [_option_]...::
This directive enables hardware timestamping of NTP packets sent to and
received from the specified network interface. The network interface controller
@@ -2208,17 +2234,6 @@ hwtimestamp eth1 txcomp 300e-9 rxcomp 645e-9
hwtimestamp *
----
[[include]]*include* _pattern_::
The *include* directive includes a configuration file or multiple configuration
files if a wildcard pattern is specified. This can be useful when maintaining
configuration on multiple hosts to keep the differences in separate files.
+
An example of the directive is:
+
----
include @SYSCONFDIR@/chrony.d/*.conf
----
[[keyfile]]*keyfile* _file_::
This directive is used to specify the location of the file containing symmetric
keys which are shared between NTP servers and clients, or peers, in order to