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sources: try to replace NTP sources with bad distance

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Similarly to unreachable sources and falsetickers, try to replace
sources with distance larger than the limit set by the maxdistance
directive with a newly resolved address of the hostname.
This commit is contained in:
Miroslav Lichvar 2016-03-22 17:01:38 +01:00
parent eb329e9f52
commit d70e815e9f
2 changed files with 10 additions and 7 deletions
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9
doc/chrony.conf.adoc
View file

@ -204,10 +204,11 @@ the default value is 4.
+
On start, when the pool name is resolved, *chronyd* will add up to 16 sources,
one for each resolved address. When the number of sources from which at least
one valid reply was received reaches *maxsources*, the other sources will be
removed. When a pool source is unreachable or marked as a falseticker,
*chronyd* will try to replace the source with a newly resolved address of the
pool.
one valid reply was received reaches the number specified by the *maxsources*
option, the other sources will be removed. When a pool source is unreachable,
marked as a falseticker, or has a distance larger than the limit set by the
<<maxdistance,*maxdistance*>> directive, *chronyd* will try to replace the
source with a newly resolved address from the pool.
+
An example of the *pool* directive is
+

8
sources.c
View file

@ -429,9 +429,11 @@ SRC_UpdateReachability(SRC_Instance inst, int reachable)
REF_SetUnsynchronised();
}
/* Try to replace NTP sources that are unreachable or falsetickers */
if (inst->type == SRC_NTP && (inst->status == SRC_FALSETICKER ||
(!inst->reachability && inst->reachability_size == SOURCE_REACH_BITS))) {
/* Try to replace NTP sources that are unreachable, falsetickers, or
have root distance larger than the allowed maximum */
if (inst->type == SRC_NTP &&
((!inst->reachability && inst->reachability_size == SOURCE_REACH_BITS) ||
inst->status == SRC_FALSETICKER || inst->status == SRC_BAD_DISTANCE)) {
NSR_HandleBadSource(inst->ip_addr);
}
}