dhcpd.conf logging statement documentation

[Glenn Satchell]

dhcpd cannot log directly to a file using commands in dhcpd.conf, it only
logs via syslog.

Perhaps capturing the stderr stream might work for you. This is from the
dhcpd man page:

     -d   Send log messages to  the  standard  error  descriptor.
          This  can  be  useful  for debugging, and also at sites
          where a complete log of all dhcp activity must be  kept
          but  syslogd  is  not  reliable  or otherwise cannot be
          used.   Normally, dhcpd will log all output  using  the
          syslog(3)   function  with  the  log  facility  set  to
          LOG_DAEMON.  Note that -d implies -f (the  daemon  will
          not fork itself into the background).

Usage would be something like

    dhcpd -d 2> file.log

The logging example below is in the section on DNS updates, and is for
configuring logging for the BIND dns server, not dhcpd. The documentation
is in the BIND Administrator's Reference Manual, select the version on
this page http://www.isc.org/software/bind/documentation

In the man page the sentence immediately preceding the example is:

     You may wish to enable logging of DNS updates  on  your  DNS
     server.   To do so, you might write a logging statement like
     the following:

regards,
-glenn

> man page states for logging statement with the following example:
>
>   logging {
>             channel update_debug {
>                  file "/var/log/update-debug.log";
>                  severity  debug 3;
>                  print-category yes;
>                  print-severity yes;
>                  print-time     yes;
>             };
>             channel security_info    {
>                  file "/var/log/named-auth.info";
>                  severity  info;
>                  print-category yes;
>                  print-severity yes;
>                  print-time     yes;
>             };
>
>             category update { update_debug; };
>             category security { security_info; };
>        };
>
> as you can see there is severity can be defined.
> before digging sources for understanding its syntax I would ask community
> -
> perhaps there is some document reference for it already....
>
> Please dont offer syslog, since I have stated already that Im not going to
> configure it, because I want to configure only dhcpd.conf. Also, please
> note
> that I have asked for a document reference.
>
> On Пн, 26 мар 12 13:56:23 perl-list wrote:
>
> To my knowledge, you cannot reduce logging verbosity inside dhcpd itself.
> You
> can only change what is logged via syslog working with log levels.
>
>
> For example:
>
>
> in dhcpd.conf:
> log-facility local6;
>
>
> in syslog.conf:
> local6.error -/var/log/dhcpd-error.log
> local6.* -/dev/null
>
>
> or similar ... please note that I have not tested the syslog statements
> and
> that they may require some modification to actually work...
>
>
>
>
>
> From: "Vasiliy Molostov" <molostoff at gmail.com>
> To: dhcp-users at lists.isc.org
> Sent: Monday, March 26, 2012 12:51:25 PM
> Subject: dhcpd.conf logging statement documentation
>
> Hi!
>
> Please help locate documentation reference for a 'logging' statement used
> as
> example on dhcpd.conf(5) man page, with exact syntax and structure
> reference
> on this subj.
>
> googling gave nothing, and I have found nothing related to 'logging' in
> isc
> site docs and in source distrubution release docs .
>
> The question is simply refers to reduce usual (default) logging verbosity
> from
> dhcpd, but I have found only examples on how to use syslog config instead
> of
> configuring dhcpd.conf, while I need to configure mainly dhcpd.conf
> logging
> options ...
>
> Any link on this subj would be fine...
>
> Thanks
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>
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>
>
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