[Dnsmasq-discuss] Too many logs produced when using a lot of “server=/domain/nameserver” config entires

[s]

Hello,

In China some of us use dnsmasq to resolv all domestic domains from local
nameservers, but anything else from other more secure nameservers, e.g. via VPN
tunnel or dnscrypt. We have a list of 20k+ local domains, which is translated
into 20k+ lines of config file[1].

Dnsmasq works just fine in this configuration. Memory footprint and query speed
are still very good. But it produces too many logs. In fact it produce a log
entry for each of these “server=/.../.../” lines every time it starts/reloads.
The logs look like

using nameserver 223.6.6.6#53 for domain youxiwangguo.com

I have went through doc and source code, but there is no option to disable these
logs. I can filter the logs, but it is not very ideal, and I will have to do
that for both rsyslog and journald.

Can dnsmasq itself make some changes or add a config option to disable/reduce
these logs?

1. https://github.com/felixonmars/dnsmasq-china-list

See also https://github.com/felixonmars/dnsmasq-china-list/issues/124, which I
reported.

Best regards,
sopium

[Simon Kelley]

I just committed some code to limit these logs, if there are more than
30 servers, only the first 30 are logged, followed by a single line
which gives the number not logged. The 30 was a reasonable default, it's
changeable in src/config.h

Does that seem like a good solution?


Cheers,

Simon.

Post by s
Hello,
In China some of us use dnsmasq to resolv all domestic domains from local
nameservers, but anything else from other more secure nameservers, e.g. via VPN
tunnel or dnscrypt. We have a list of 20k+ local domains, which is translated
into 20k+ lines of config file[1].
Dnsmasq works just fine in this configuration. Memory footprint and query speed
are still very good. But it produces too many logs. In fact it produce a log
entry for each of these “server=/.../.../” lines every time it starts/reloads.
The logs look like

using nameserver 223.6.6.6#53 for domain youxiwangguo.com

I have went through doc and source code, but there is no option to disable these
logs. I can filter the logs, but it is not very ideal, and I will have to do
that for both rsyslog and journald.
Can dnsmasq itself make some changes or add a config option to disable/reduce
these logs?
1. https://github.com/felixonmars/dnsmasq-china-list
See also https://github.com/felixonmars/dnsmasq-china-list/issues/124, which I
reported.
Best regards,
sopium
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