Add parameter rtcsync.

To avoid having it hardcoded by the template.

REFERENCE.md

@@ -483,6 +483,14 @@ See [clientloglimit](https://chrony.tuxfamily.org/doc/3.4/chrony.conf.html#clien
 
 Default value: `undef`
 
+##### `rtcsync`
+
+Data type: Boolean
+
+Periodically sync syste time to RTC
+
+Default value: `true'
+
 ##### `rtconutc`
 
 Data type: Boolean

manifests/init.pp

@@ -168,6 +168,8 @@
 #   When set, specifies the maximum amount of memory in bytes that chronyd is allowed to allocate for logging of client accesses.
 #   If not set, chrony's, default will be used. In modern versions this is 524288 bytes.  Older versions defaulted to have no limit.
 #   See [clientloglimit](https://chrony.tuxfamily.org/doc/3.4/chrony.conf.html#clientloglimit)
+# @param rtcsync
+#  Sync system clock to RTC periodically
 # @param rtconutc
 #   Keep RTC in UTC instead of local time.
 #   If not set, chrony's, default will be used. On Arch Linux the default is true instead.
@@ -224,6 +226,7 @@
   Optional[String] $leapsectz                                      = undef,
   Optional[Float] $maxslewrate                                     = undef,
   Optional[Numeric] $stratumweight                                 = undef,
+  Boolean $rtcsync                                                 = true,
   Boolean $rtconutc                                                = $chrony::params::rtconutc,
   Variant[Hash,Array[String]] $hwtimestamps                        = [],
 ) inherits chrony::params {

templates/chrony.conf.epp

@@ -17,9 +17,11 @@ stratumweight <%= $chrony::stratumweight %>
 
 # Record the rate at which the system clock gains/losses time.
 driftfile <%= $chrony::driftfile %>
+<% if $chrony::rtcsync { -%>
 
 # Enable kernel RTC synchronization.
 rtcsync
+<% } -%>
 <% if $chrony::makestep_seconds and $chrony::makestep_updates { -%>
 
 # In first <%= $chrony::makestep_updates %> updates step the system clock instead of slew