On Thu, Oct 18, 2018 at 9:01 AM Laurent Weislo <laurent.wei...@gmail.com> wrote:
> Hi, > > We had a strange behaviour with our old master running bind version: 9.3.6 > release: 20.P1.el5. > > We modify NSC m4 data files when adding one or more A records and use the > make command to build the full environment on the master itself. At the end > of the build, an HUP signal is sent to the named process. After the signal > is sent, if a new change comes in, the process occurs again, thus modifying > the files (that are supposed to be already loaded by named). > After a bunch of years and under heavy load on the master, we lost almost > 4K records because the domain file seems to have been loaded while being > generated. > > My questions are: > - is 'rndc reload' returning when all zone files have been reloaded or is > it returning while the loading process is ongoing ? > I believe that rndc returns immediately, while the loading process is just starting. > - same question with sending a HUP signal ? does it behave like 'rndc > reload' ? > Signals like 'HUP' always return immediately, they have no way of knowing what the process will do with the signal, if anything. > - how to ensure that named has loaded the files before modifying them > again since they are at the same location ? > Good question. For sure, as Anne says, you want to build temporary files and 'move' them to the final location, so that there are never partial files in place. > > The log message reports 'loading configuration', but why not > 'configuration files loaded' ? > I believe that the process starts with: 18-Oct-2018 12:55:29.975 general: info: received control channel command 'reload' 18-Oct-2018 12:55:29.975 general: info: loading configuration from '/etc/named.conf' And ends with: 18-Oct-2018 12:55:30.358 general: notice: all zones loaded -- Bob Harold > > Below is the event timeline, I hope it is clear enough for everyone: > 1. Oct 16 17:24:18 SLAVE1 named[29671]: [ID 873579 daemon.info] transfer > of 'our.domain.com/IN' from 192.168.122.100#53: Transfer completed: 10 > messages, *14890* records, 413507 bytes, 0.249 secs (1660670 bytes/sec) > 2. (10/16/2018 17:28:57.202:1683726) : user pid=7501 uid=root > auid=unknown(65030) msg='cmd=/sbin/service named reload (terminal=? > res=success)' > 3. Oct 16 17:28:57 MASTER named[3292]: loading configuration from > '/etc/named.conf' -> 2018101639 > 4. AUTOMATION TOOL:16-10 17:28:57 newhostname 1045 Add DNS START > 5. 2018-10-16 17:29:00 +0200 (Tue, 16 Oct 2018) | 1 line IDXXX: Add DNS > entry newhostname with 10.10.10.10 | r20907 | > 6. Oct 16 17:29:02 MASTER named[3292]: zone/our.domain.com:11473: file > does not end with newline <- NSC make is running, generating new files > because newhostname is added to a m4 file. > 7. Oct 16 17:29:02 MASTER named[3292]: zone our.domain.com/IN: loaded > serial 2018101640 > 8. Oct 16 17:29:02 MASTER named[3292]: zone our.domain.com/IN: sending > notifies (serial 2018101640) > 9. Oct 16 17:29:19 SLAVE1 named[29671]: [ID 873579 daemon.info] transfer > of 'our.domain.com/IN' from 192.168.122.100#53: Transfer completed: 7 > messages, *10806* records, 302763 bytes, 0.192 secs (1576890 bytes/sec) > 10. (10/16/2018 17:34:27.798:1683828) : user pid=12079 uid=root > auid=unknown(65030) msg='cmd=/sbin/service named reload (terminal=? > res=success)' > 11. Oct 16 17:34:27 MASTER named[3292]: loading configuration from > '/etc/named.conf' -> 2018101640 > 12. AUTOMATION TOOL:16-10 17:34:28 newhostname 1045 Add DNS SUCCESS > 13. Oct 16 17:34:33 MASTER named[3292]: zone our.domain.com/IN: zone > serial unchanged > 14. Oct 16 17:34:33 MASTER named[3292]: zone our.domain.com/IN: loaded > serial 2018101640 > 15. Oct 16 17:34:33 MASTER named[3292]: zone our.domain.com/IN: sending > notifies (serial 2018101640) > 16. (10/16/2018 17:39:59.934:1683878) : user pid=15753 uid=root > auid=unknown(65030) msg='cmd=/sbin/service named reload (terminal=? > res=success)' > 17. Oct 16 17:40:52 SLAVE1 named[29671]: [ID 873579 daemon.info] transfer > of 'our.domain.com/IN' from 192.168.122.100#53: Transfer completed: 10 > messages, *14893* records, 413605 bytes, 0.255 secs (1621980 bytes/sec) > > > Thank you for you help and sorry to bother you with that. > > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > unsubscribe from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users >
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