Bug 986098

Summary:	RFE: one-time "check server" mode
Product:	[Fedora] Fedora	Reporter:	Matthew Miller <mattdm>
Component:	chrony	Assignee:	Miroslav Lichvar <mlichvar>
Status:	CLOSED RAWHIDE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	mlichvar, samuel-rhbugs
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Hardware:	Unspecified
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Fixed In Version:	chrony-1.30-0.1.pre1.fc21	Doc Type:	Bug Fix
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Clone Of:		Environment:
Last Closed:	2014-06-09 13:50:07 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Matthew Miller 2013-07-19 01:05:05 UTC

Currently, Anaconda uses ntpdate to check whether a given ntpserver is available (without setting the time). 

https://fedoraproject.org/wiki/Changes/ntpdate

proposes to deprecate ntpdate. It would be nice if chrony had an equivalent command or mode, so that chrony can completely replace the ntp package (from which ntpdate is built).

Comment 1 Miroslav Lichvar 2013-07-19 07:02:48 UTC

That would be a nice feature, I'll see if we can get it included.

In the meantime you can use sntp, which is the replacement for ntpdate recommended by the NTP upstream.

Comment 2 Miroslav Lichvar 2014-04-09 15:04:06 UTC

This is now implemented in upstream git and it will be in chrony-1.30. It can be used like this:

# ./chronyd -Q "server 0.pool.ntp.org iburst"
2014-04-09T15:00:53Z chronyd version DEVELOPMENT starting
2014-04-09T15:00:53Z Initial frequency -13.273 ppm
2014-04-09T15:00:58Z System clock wrong by -0.013297 seconds (ignored)
2014-04-09T15:00:58Z chronyd exiting

A non-zero exit code indicates that no suitable servers could be reached.