Dominic Fandrey
2010-Mar-09 08:08 UTC
ntpd does not re-query servers, when a new interface appears
ntpd tracks interface updates, however it does not requery
servers, when they occur. This was less than an hour ago,
at my university, the notebook boots and is not connected
to anything:
9 Mar 08:07:17 ntpd[1510]: logging to file /var/log/ntpd
9 Mar 08:07:17 ntpd[1510]: precision = 2.234 usec
9 Mar 08:07:17 ntpd[1510]: Listening on interface #0 wildcard, 0.0.0.0#123
Disabled
9 Mar 08:07:17 ntpd[1510]: Listening on interface #1 wildcard, ::#123 Disabled
9 Mar 08:07:17 ntpd[1510]: Listening on interface #2 bge0, 192.168.1.12#123
Enabled
9 Mar 08:07:17 ntpd[1510]: Listening on interface #3 lo0, fe80::1#123 Enabled
9 Mar 08:07:17 ntpd[1510]: Listening on interface #4 lo0, ::1#123 Enabled
9 Mar 08:07:17 ntpd[1510]: Listening on interface #5 lo0, 127.0.0.1#123 Enabled
9 Mar 08:07:17 ntpd[1510]: Listening on routing socket on fd #26 for interface
updates
9 Mar 08:07:17 ntpd[1510]: kernel time sync status 2040
9 Mar 08:07:17 ntpd[1510]: frequency initialized 3.155 PPM from
/var/db/ntpd.drift
9 Mar 08:07:20 ntpd[1542]: host name not found: 0.de.pool.ntp.org
9 Mar 08:07:20 ntpd[1542]: couldn't resolve `0.de.pool.ntp.org', giving
up on it
9 Mar 08:07:20 ntpd[1542]: host name not found: 1.de.pool.ntp.org
9 Mar 08:07:20 ntpd[1542]: couldn't resolve `1.de.pool.ntp.org', giving
up on it
9 Mar 08:07:20 ntpd[1542]: host name not found: 2.de.pool.ntp.org
9 Mar 08:07:20 ntpd[1542]: couldn't resolve `2.de.pool.ntp.org', giving
up on it
9 Mar 08:07:20 ntpd[1542]: host name not found: ntp1.rz.uni-karlsruhe.de
9 Mar 08:07:20 ntpd[1542]: couldn't resolve `ntp1.rz.uni-karlsruhe.de',
giving up on it
9 Mar 08:07:20 ntpd[1542]: host name not found: ntp1.rz.uni-karlsruhe.de
9 Mar 08:07:20 ntpd[1542]: couldn't resolve `ntp1.rz.uni-karlsruhe.de',
giving up on it
9 Mar 08:07:20 ntpd[1542]: host name not found: ntp3.rz.uni-karlsruhe.de
9 Mar 08:07:20 ntpd[1542]: couldn't resolve `ntp3.rz.uni-karlsruhe.de',
giving up on it
9 Mar 08:07:20 ntpd[1542]: host name not found: ntp4.rz.uni-karlsruhe.de
9 Mar 08:07:20 ntpd[1542]: couldn't resolve `ntp4.rz.uni-karlsruhe.de',
giving up on it
So ntpd has given up on all the servers listed in the ntp.conf file.
I then proceed to connect to the wireless network and proceed to log
into two VPNs:
9 Mar 08:08:58 ntpd[1510]: Listening on interface #6 wlan0, 192.168.75.58#123
Enabled
9 Mar 08:09:00 ntpd[1510]: Listening on interface #7 tun0, 193.196.120.15#123
Enabled
9 Mar 08:09:04 ntpd[1510]: Listening on interface #8 tun1, 141.3.162.67#123
Enabled
Over interface #8 some of the servers are actually available, but
ntpq -p still states:
No association ID's returned
Only when I restart ntpd, it operates as expected:
remote refid st t when poll reach delay offset jitter
=============================================================================
zit-net2.uni-pa .STEP. 16 u - 512 0 0.000 0.000 0.000
alpha.rueckgr.a .STEP. 16 u - 512 0 0.000 0.000 0.000
ntp.goneco.de .STEP. 16 u - 512 0 0.000 0.000 0.000
+proxy4.rz.uni-k 129.13.64.17 2 u 30 128 271 2.937 2.530 1.891
+proxy2.rz.uni-k 129.13.64.17 2 u 58 128 375 3.593 -8.981 1.837
*proxy1.rz.uni-k 129.13.64.17 2 u 15 128 271 3.297 8.244 1.487
--
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
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Ian Smith
2010-Mar-09 10:27 UTC
ntpd does not re-query servers, when a new interface appears
On Tue, 9 Mar 2010, Dominic Fandrey wrote: > ntpd tracks interface updates, however it does not requery > servers, when they occur. This was less than an hour ago, > at my university, the notebook boots and is not connected > to anything: > > 9 Mar 08:07:17 ntpd[1510]: logging to file /var/log/ntpd > 9 Mar 08:07:17 ntpd[1510]: precision = 2.234 usec > 9 Mar 08:07:17 ntpd[1510]: Listening on interface #0 wildcard, 0.0.0.0#123 Disabled > 9 Mar 08:07:17 ntpd[1510]: Listening on interface #1 wildcard, ::#123 Disabled > 9 Mar 08:07:17 ntpd[1510]: Listening on interface #2 bge0, 192.168.1.12#123 Enabled > 9 Mar 08:07:17 ntpd[1510]: Listening on interface #3 lo0, fe80::1#123 Enabled > 9 Mar 08:07:17 ntpd[1510]: Listening on interface #4 lo0, ::1#123 Enabled > 9 Mar 08:07:17 ntpd[1510]: Listening on interface #5 lo0, 127.0.0.1#123 Enabled > 9 Mar 08:07:17 ntpd[1510]: Listening on routing socket on fd #26 for interface updates > 9 Mar 08:07:17 ntpd[1510]: kernel time sync status 2040 > 9 Mar 08:07:17 ntpd[1510]: frequency initialized 3.155 PPM from /var/db/ntpd.drift > 9 Mar 08:07:20 ntpd[1542]: host name not found: 0.de.pool.ntp.org > 9 Mar 08:07:20 ntpd[1542]: couldn't resolve `0.de.pool.ntp.org', giving up on it > 9 Mar 08:07:20 ntpd[1542]: host name not found: 1.de.pool.ntp.org > 9 Mar 08:07:20 ntpd[1542]: couldn't resolve `1.de.pool.ntp.org', giving up on it > 9 Mar 08:07:20 ntpd[1542]: host name not found: 2.de.pool.ntp.org > 9 Mar 08:07:20 ntpd[1542]: couldn't resolve `2.de.pool.ntp.org', giving up on it > 9 Mar 08:07:20 ntpd[1542]: host name not found: ntp1.rz.uni-karlsruhe.de > 9 Mar 08:07:20 ntpd[1542]: couldn't resolve `ntp1.rz.uni-karlsruhe.de', giving up on it > 9 Mar 08:07:20 ntpd[1542]: host name not found: ntp1.rz.uni-karlsruhe.de > 9 Mar 08:07:20 ntpd[1542]: couldn't resolve `ntp1.rz.uni-karlsruhe.de', giving up on it > 9 Mar 08:07:20 ntpd[1542]: host name not found: ntp3.rz.uni-karlsruhe.de > 9 Mar 08:07:20 ntpd[1542]: couldn't resolve `ntp3.rz.uni-karlsruhe.de', giving up on it > 9 Mar 08:07:20 ntpd[1542]: host name not found: ntp4.rz.uni-karlsruhe.de > 9 Mar 08:07:20 ntpd[1542]: couldn't resolve `ntp4.rz.uni-karlsruhe.de', giving up on it > > So ntpd has given up on all the servers listed in the ntp.conf file. Yes, but it looks more like name service that's not operating, ntpd seems to be doing its best but can't resolve the hostnames? > I then proceed to connect to the wireless network and proceed to log > into two VPNs: > > 9 Mar 08:08:58 ntpd[1510]: Listening on interface #6 wlan0, 192.168.75.58#123 Enabled > 9 Mar 08:09:00 ntpd[1510]: Listening on interface #7 tun0, 193.196.120.15#123 Enabled > 9 Mar 08:09:04 ntpd[1510]: Listening on interface #8 tun1, 141.3.162.67#123 Enabled > > Over interface #8 some of the servers are actually available, but > ntpq -p still states: > No association ID's returned > > Only when I restart ntpd, it operates as expected: > remote refid st t when poll reach delay offset jitter > ============================================================================= > zit-net2.uni-pa .STEP. 16 u - 512 0 0.000 0.000 0.000 > alpha.rueckgr.a .STEP. 16 u - 512 0 0.000 0.000 0.000 > ntp.goneco.de .STEP. 16 u - 512 0 0.000 0.000 0.000 > +proxy4.rz.uni-k 129.13.64.17 2 u 30 128 271 2.937 2.530 1.891 > +proxy2.rz.uni-k 129.13.64.17 2 u 58 128 375 3.593 -8.981 1.837 > *proxy1.rz.uni-k 129.13.64.17 2 u 15 128 271 3.297 8.244 1.487 I've always had to restart named after losing / regaining an interface, most noticeably after a suspend/resume (eg a low battery suspend), so I run /etc/rc.d/named restart from rc.resume. This looks like a similar issue perhaps, though I don't see why restarting only ntpd would fix it. HTH, Ian