Hi Dominique,
The clock skew warning shows up when your NTP daemon is not synced.
You can see the sync in the output of ntpq -p
This is a synced NTP
# ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
ntp.unimelb.edu 210.9.192.50 2 u 24 64 17 0.496 -6.421
0.181
*ntp2.unimelb.ed 202.6.131.118 2 u 26 64 17 0.613 -11.998
0.250
ntp41.frosteri. .INIT. 16 u - 64 0 0.000 0.000
0.000
dns01.ntl02.pri .INIT. 16 u - 64 0 0.000 0.000
0.000
cosima.470n.act .INIT. 16 u - 64 0 0.000 0.000
0.000
x.ns.gin.ntt.ne .INIT. 16 u - 64 0 0.000 0.000
0.000
The *'s show that there is a sync with a NTP server. When you start or
restart ntp, it takes a while for a sync to occur
Here's immediately after restarting the ntp daemon
# ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
ntp.unimelb.edu 210.9.192.50 2 u - 64 1 0.496 -6.421
0.000
ntp2.unimelb.ed 202.6.131.118 2 u - 64 1 0.474 -11.678
0.000
ntp41.frosteri. .INIT. 16 u - 64 0 0.000 0.000
0.000
dns01.ntl02.pri .INIT. 16 u - 64 0 0.000 0.000
0.000
cosima.470n.act .INIT. 16 u - 64 0 0.000 0.000
0.000
x.ns.gin.ntt.ne .INIT. 16 u - 64 0 0.000 0.000
0.000
Make sure that nothing is regularly restarting ntpd. For us, we had puppet
and dhcp regularly fight over the contents of ntp.conf, and it caused a
restart of ntpd.
Sean
On Wed, 15 Aug 2018 at 19:37, Dominque Roux <[email protected]>
wrote:
> Hi all,
>
> We recently facing clock skews from time to time.
> This means that sometimes everything is fine but hours later the warning
> appears again.
>
> NTPD is running and configured with the same pool.
>
> Did someone else already had the same issue and could probably help us
> to fix this?
>
> Thanks a lot!
>
> Dominique
> --
>
> Your Swiss, Open Source and IPv6 Virtual Machine. Now on
> www.datacenterlight.ch
>
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>
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