Hello,

I'm running Confluent com a cluster and it seems that dnsmasq does not work as 
expected:

[root@mmgt01 etc]# !nslookup
nslookup cn003
Server: 127.0.0.1
Address: 127.0.0.1#53

Name: cn003.cluster.domain.com
Address: 172.28.0.3
** server can't find cn003.cluster.domain.com: REFUSED


Any ideia why it get's refused but resolves? This issue many times slows down 
name resolution.

Here's /var/log/messages:

Oct 22 00:29:02 mmgt01 dnsmasq[400928]: reading /etc/resolv.conf
Oct 22 00:29:02 mmgt01 dnsmasq[400928]: ignoring nameserver 172.28.253.1 - 
local interface
Oct 22 00:29:02 mmgt01 dnsmasq[400928]: read /etc/hosts - 181 addresses
Oct 22 00:32:14 mmgt01 dnsmasq[400928]: reading /etc/resolv.conf
Oct 22 00:32:14 mmgt01 dnsmasq[400928]: ignoring nameserver 172.28.253.1 - 
local interface
Oct 22 00:32:15 mmgt01 dnsmasq[400928]: reading /etc/resolv.conf
Oct 22 00:32:15 mmgt01 dnsmasq[400928]: ignoring nameserver 172.28.253.1 - 
local interface
Oct 22 00:32:53 mmgt01 dnsmasq[400928]: reading /etc/resolv.conf
Oct 22 00:32:53 mmgt01 dnsmasq[400928]: ignoring nameserver 172.28.253.1 - 
local interface
Oct 22 00:32:53 mmgt01 dnsmasq[400928]: reading /etc/resolv.conf
Oct 22 00:32:53 mmgt01 dnsmasq[400928]: ignoring nameserver 172.28.253.1 - 
local interface
Oct 22 00:34:32 mmgt01 dnsmasq[400928]: reading /etc/resolv.conf
Oct 22 00:34:32 mmgt01 dnsmasq[400928]: ignoring nameserver 127.0.0.1 - local 
interface
Oct 22 00:34:32 mmgt01 dnsmasq[400928]: reading /etc/resolv.conf
Oct 22 00:34:32 mmgt01 dnsmasq[400928]: ignoring nameserver 127.0.0.1 - local 
interface
Oct 22 00:34:38 mmgt01 dnsmasq[400928]: exiting on receipt of SIGTERM
Oct 22 00:34:38 mmgt01 systemd[1]: dnsmasq.service: Succeeded.
Oct 22 00:34:38 mmgt01 dnsmasq[405484]: started, version 2.79 cachesize 150
Oct 22 00:34:38 mmgt01 dnsmasq[405484]: compile time options: IPv6 GNU-getopt 
DBus no-i18n IDN2 DHCP DHCPv6 no-Lua TFTP no-conntrack ipset auth DNSSEC 
loop-detect inotify
Oct 22 00:34:38 mmgt01 dnsmasq[405484]: reading /etc/resolv.conf
Oct 22 00:34:38 mmgt01 dnsmasq[405484]: ignoring nameserver 127.0.0.1 - local 
interface
Oct 22 00:34:38 mmgt01 dnsmasq[405484]: read /etc/hosts - 181 addresses


And here's /etc/resolv.conf:

[root@mmgt01 etc]# cat /etc/resolv.conf 
# Generated by NetworkManager
search cluster.domain.com
nameserver 127.0.0.1



dnsmasq settings is default by confluent instructions:
[root@mmgt01 etc]# cat /etc/dnsmasq.conf  | grep -v \# |uniq

user=dnsmasq
group=dnsmasq

conf-dir=/etc/dnsmasq.d,.rpmnew,.rpmsave,.rpmorig




mmgt01 is the management node.


Ideas?

Regards,





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