11 Bře
2013
11 Bře
'13
18:36
Hi Jan-Piet,
I think you were hit by:
https://lists.nic.cz/pipermail/knot-dns-users/2012-September/000101.html
--cut here--
this is a known bug in probably libc in CentOS6 or equivalent RHEL.
Workaround is to disable recvmmsg backend on configure with configure
flag "--enable-recvmmsg=no"
$ cd knot-src
$ autoreconf -if
$ ./configure --enable-recvmmsg=no
$ make && sudo make install
For more information see:
https://bugzilla.redhat.com/show_bug.cgi?id=760177#c27
--cut here--
I guess we should add a new section on the web with known caveats.
Ondrej
On 11. 3. 2013, at 18:15, Jan-Piet Mens <jpmens.dns(a)gmail.com> wrote:
Hello,
I'm pretty sure I have tomatoes (or other vegetables) on my eyes, but
Knot won't answer UDP queries here, running on Centos 6.3 in an OpenVZ
container. This is the minimal configuration and the results I'm seeing:
$ knotc -V
Knot DNS, version 1.2.0-rc3
$ cat knot.sample.conf
system {
identity "knot 1.2-rc2";
storage "/etc/knot";
}
interfaces {
my-iface { address 127.0.0.1@53; }
}
zones {
example.com {
file "example.com.zone";
}
}
log {
syslog { any info, debug, notice, warning, error; }
}
$ knotc -c knot.sample.conf start
2013-03-11T18:07:44.244202+01:00 Starting server...
2013-03-11T18:07:44.244337+01:00 Zone 'example.com.' is up-to-date.
$ netstat -anp
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
PID/Program name
tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN
11408/knotd
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
486/sshd
tcp 0 0 172.16.153.104:22 172.16.153.1:64881 ESTABLISHED
554/sshd
tcp 0 0 :::22 :::* LISTEN
486/sshd
udp 0 0 127.0.0.1:53 0.0.0.0:*
11408/knotd
unix 2 [ ] DGRAM 8840414 11408/knotd
$ dig @127.0.0.1 example.com any
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6_3.6 <<>> @127.0.0.1
example.com a
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
$ dig +tcp @127.0.0.1 example.com a
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6_3.6 <<>> +tcp
@127.0.0.1 example.com a
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20248
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;example.com. IN A
;; AUTHORITY SECTION:
example.com. 60 IN SOA localhost. root.localhost. 1997022700 28800 14400 3600000 86400
;; Query time: 2 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon Mar 11 18:08:32 2013
;; MSG SIZE rcvd: 79
Mar 11 18:07:44 knot knot[11408]: Binding to interface 127.0.0.1 port 53.
Mar 11 18:07:44 knot knot[11408]: Configured 1 interfaces and 1 zones.
Mar 11 18:07:44 knot knot[11408]:
Mar 11 18:07:44 knot knot[11408]: Loading 1 compiled zones...
Mar 11 18:07:44 knot knot[11408]: Loaded zone 'example.com.' serial 1997022700
Mar 11 18:07:44 knot knot[11408]: Loaded 1 out of 1 zones.
Mar 11 18:07:44 knot knot[11408]: Starting server...
Mar 11 18:07:44 knot knot[11408]: Server started as a daemon, PID = 11408
Mar 11 18:07:44 knot knot[11408]: PID stored in /etc/knot/knot.pid
Can you please help me open my eyes?
Thanks,
-JP
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Ondřej Surý -- Chief Science Officer
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