Hello,
I have just run into a weird problem and since I have failed to look
this up on the Web myself, I wonder if anyone here could give me a
pointer regarding what to do with it.
I run a Linux/arm DNS server based on knot-3.0.4. It used to serve as a
slave in a zone whose master was a knot-2.9, with automatic DNSSEC
signing _on master only_ set up and working. The zone configuration
(minus "master" and "acl" keywords) looked as follows:
zonefile-load: difference-no-serial
journal-content: all
semantic-checks: on
# dnssec-signing: on
# dnssec-policy: nsec3
where "nsec3" is a policy also defined in Knot configuration, identical
to the one used on the master. In this role everything worked fine.
Recently it has been decided to retire the original master server and
replace it with the erstwhile slave. I removed the "master" line from
the zone configuration in knot.conf (yes, I did leave the DNSSEC line
commented out) in addition to setting up replication to a new slave
server, copied the key files + the KASP dump from the old master and
installed them in the right places, then restarted knot. Again, so far
so good.
I then attempted to re-enable DNSSEC by uncommenting those two lines -
and immediately after I'd run 'knotc reload' Knot began spamming the
system log with lines like
info: [example.com.] zone file parsed, serial corrected 2021020301 ->
2021020303
info: [example.com.] DNSSEC, key, tag 4533, algorithm
RSASHA1_NSEC3_SHA1, KSK, public, active
info: [example.com.] DNSSEC, key, tag 10532, algorithm
RSASHA1_NSEC3_SHA1, public, active
info: [example.com.] DNSSEC, signing started
info: [example.com.] DNSSEC, successfully signed
info: [example.com.] loaded, serial 2021020302 -> 2021020303 ->
2021020302, 113233 bytes
info: [example.com.] DNSSEC, next signing at 2021-02-10T13:21:14+0000
info: [example.com.] zone file parsed, serial corrected 2021020301 ->
2021020303
info: [example.com.] DNSSEC, key, tag 4533, algorithm
RSASHA1_NSEC3_SHA1, KSK, public, active
info: [example.com.] DNSSEC, key, tag 10532, algorithm
RSASHA1_NSEC3_SHA1, public, active
info: [example.com.] DNSSEC, signing started
info: [example.com.] DNSSEC, successfully signed
info: [example.com.] loaded, serial 2021020302 -> 2021020303 ->
2021020302, 113233 bytes
info: [example.com.] DNSSEC, next signing at 2021-02-10T13:21:14+0000
info: [example.com.] zone file parsed, serial corrected 2021020301 ->
2021020303
[...and so on...]
This was accompanied by knot consistently requiring much more CPU power
than usual. I also noticed that unlike before, running 'knotc
zone-flush' or shutting Knot down does NOT update the plain-text zone files.
From what I could see by removing old DNSSEC signatures and the NSEC3
chain from the zone file, restarting Knot and then querying the server
with dig, the server does indeed sign the zone. Therefore, my current
working hypothesis is that somehow Knot does not update its internal
zone state following the successful signing, thus continuing to think
the outdated zone file found on the file system is the latest available
version. The problem is, I do not know why it does it or how I could
make it stop.
Any and all suggestions will be very much appreciated!
Cheers,
--
MS
Hi all,
I can't quite figure this out, I have two servers running Knot DNS 3.0.3 on Ubuntu 20.04.
horus.bastetrix.net is the primary, sekhmet.bastetrix.net is the secondary.
One of the zones hosted on these servers is selfhosting.cloud.
Whenever I commit a change to selfhosting.cloud, this happens in the log. As you can see, for some reason the IPv4 address returns a NOTAUTH error and then Knot successfully notifies over IPv6.
Dec 27 00:53:37 horus.bastetrix.net knotd[174159]: warning: [selfhosting.cloud.] notify, outgoing, remote 192.195.251.53@53, server responded with error 'NOTAUTH'
Dec 27 00:53:37 horus.bastetrix.net knotd[174159]: info: [selfhosting.cloud.] notify, outgoing, remote 2620:98:400c::53@53, serial 5
Dec 27 00:53:38 horus.bastetrix.net knotd[174159]: info: [selfhosting.cloud.] IXFR, outgoing, remote 2620:98:400c::53@36778, started, serial 4 -> 5
Dec 27 00:53:38 horus.bastetrix.net knotd[174159]: info: [selfhosting.cloud.] IXFR, outgoing, remote 2620:98:400c::53@36778, finished, 0.00 seconds, 1 messages, 295 bytes
sekhmet only logs a successful notify and IXFR from the v6 address, nothing about the failed v4 notify:
Dec 27 00:53:37 sekhmet.bastetrix.net knotd[536887]: info: [selfhosting.cloud.] notify, incoming, remote 2620:98:400a::53@58782, serial 5
Dec 27 00:53:38 sekhmet.bastetrix.net knotd[536887]: info: [selfhosting.cloud.] refresh, remote 2620:98:400a::53@53, remote serial 5, zone is outdated
Dec 27 00:53:38 sekhmet.bastetrix.net knotd[536887]: info: [selfhosting.cloud.] IXFR, incoming, remote 2620:98:400a::53@53, started
Dec 27 00:53:38 sekhmet.bastetrix.net knotd[536887]: info: [selfhosting.cloud.] IXFR, incoming, remote 2620:98:400a::53@53, finished, 0.00 seconds, 1 messages, 295 bytes
Dec 27 00:53:38 sekhmet.bastetrix.net knotd[536887]: info: [selfhosting.cloud.] refresh, remote 2620:98:400a::53@53, zone updated, 0.40 seconds, serial 4 -> 5
Dec 27 00:53:38 sekhmet.bastetrix.net knotd[536887]: info: [selfhosting.cloud.] zone file updated, serial 4 -> 5
I am attaching the knot.conf for both servers. I double checked both configs multiple times and don't see why that particular warning is happening during zone notify.
Can someone shed some light on this mystery?
--
Sadiq Saif
https://bastetrix.com
Hi,
We're migrating our signer from OpenDNSSEC to Knot 3.0. Our new design
will have one active signer and at least one backup signer. Zone data is
deployed from git to both signers. We've got syncing of the keys working
using `knotc zone-backup +nozonefile` and `knotc zone-restore
+nozonefile`. I'm still unsure of how hot to keep the standby. In the
dev env now I have the standby set to a manual dnssec policy to keep it
from rolling it's keys. The keys are synced from the active signer every
hour. Both the active and the backup signers are creating signatures but
SOA serials don't match. Both signers have `serial-policy: dateserial`
and `zonefile-sync: -1` but we're considering adding `zonefile-load:
difference-no-serial`.
We've discussed stopping signing on the backup altogether and including
the zonefiles in the backup. The problem we have with this idea is that
problems with signing on the backup won't be discovered until it goes
active.
Are other people doing active-backup signers and how do you set it up?
.einar
Hi (again),
I was trying to backup and restore a server with the new knotc
zone-backup/restore command.
I recognized that only half of the private keys were in the backup,
which leads to an error:
2020-12-08T14:44:00+0100 error: [xxx.] DNSSEC, failed to load private
keys (not exists)
2020-12-08T14:44:00+0100 error: [xxx.] DNSSEC, failed to load keys (not
exists)
Shouldn't the backup contain all private keys?
Thanks,
Thomas
Hi,
I was trying to backup and restore a server with the new knotc
zone-backup/restore command.
I recognized that only half of the private keys were in the backup,
which leads to an error:
2020-12-08T14:44:00+0100 error: [xxx.] DNSSEC, failed to load private
keys (not exists)
2020-12-08T14:44:00+0100 error: [xxx.] DNSSEC, failed to load keys (not
exists)
Shouldn't the backup contain all private keys?
Thanks,
Thomas
Hello,
I'm trying to remove the slave node from the master Knot, result code is
0, but no change happened. There is no information in the log file. Can
you please help me, why does it happen?
# knotc conf-get template[default].notify
> template[default].notify = 1 2 3 4 5 6 7 8 9
# knotc conf-begin
> OK
# knotc conf-set -b template[default].notify 1 2 4 5 6 7 8 9
> OK
# knotc conf-diff
(no output)
# knotc conf-get template[default].notify
> template[default].notify = 1 2 3 4 5 6 7 8 9
Thanks for your help.
--
Zdeněk Nový
Linux administrator
ACTIVE 24, s.r.o.
Sokolovská 394/17 186 00 Praha 8
Web: http://www.active24.cz
Hello,
we are facing the issue with "Too many transactions" during configuring
knot via knotc - we are using confdb. We are using Python3 worker and
popen function to knotc socket.
This is the log from the Python worker:
[2020-12-07 08:58:13,001] [INFO] adding zone xxxxxxxx
[2020-12-07 08:58:13,016] [ERROR] [event worker.job] Exception in job
'dns.add_zone'
Traceback (most recent call last):
......
ACK Exception: error running command: 'conf-begin'
retcode: 1
out: error: (too many transactions)
Is there any limitation for number of open transactions and are we able
to increase it? Is it possible to see, how many open transactions there
are now?
I can't see any message in the log file, is it possible to log
conf-begin requests? Or are there any other ways, how to determine and
guard the situation?
Many thanks for your help
--
Zdeněk Nový
Linux administrator
ACTIVE 24, s.r.o.
Sokolovská 394/17 186 00 Praha 8
Web: http://www.active24.cz
Hello,
I'm trying to remove the slave node from the master Knot, result code is
0, but no change happen. There is no information in the log file. Can
you please help me, why does it happen?
# knotc conf-get template[default].notify
> template[default].notify = 1 2 3 4 5 6 7 8 9
# knotc conf-begin
> OK
# knotc conf-set -b template[default].notify 1 2 4 5 6 7 8 9
> OK
# knotc conf-diff
(no output)
# knotc conf-get template[default].notify
> template[default].notify = 1 2 3 4 5 6 7 8 9
Thanks for your help.
--
Zdeněk Nový
Linux administrator
ACTIVE 24, s.r.o.
Sokolovská 394/17 186 00 Praha 8
Web: http://www.active24.cz
