Re: [opensuse] Considering snmp - Was: DSL always on possible?

13 Jan 2015

      On 2015-01-12 21:20, Andrei Borzenkov wrote:
...
В Mon, 12 Jan 2015 15:46:36 +0100 "Carlos E. R." <> пишет:
...
...
But it does not, apparently.
It does but see below.
...
...
└─4580 /usr/sbin/snmptrapd -A -LF n /var/log/net-snmpd.log -p /var/run/snmptrapd.pid
-LF n will limit output to messages of notice or higher priority and
apparently snmptrapd logs incoming traps at info priority. Of course it
is not documented anywhere.
The trick is in "/etc/sysconfig/net-snmp":

## Path:        System/Net-SNMP
## Description: Log level of the snmp server.
## Type:        string(!,a,c,e,w,n,i,d,0,1,2,3,4,5,6,7)
## Default:     n
#
# Defines the log level for snmpd.
#
# The default is "n" (5, LOG_NOTICE)
#
SNMPD_LOGLEVEL="7"

Change the default "n" to "7". It is probably the same as "d".

The relevant section of the manual seems to be this:

       -L[efos]
               Specify where logging  output  should  be
               directed  (standard error or output, to a
               file or via syslog).  See LOGGING OPTIONS
               in snmpcmd(1) for details.

and

LOGGING OPTIONS
       The mechanism and destination to  use  for
       logging  of warning and error messages can
       be controlled by passing  various  parame-
       ters to the -L flag.

       -Le    Log  messages to the standard error
              stream.

       -Lf FILE
              Log messages to the specified file.

       -Lo    Log messages to the standard output
              stream.

       -Ls FACILITY
              Log  messages via syslog, using the
              specified   facility    ('d'    for
              LOG_DAEMON,  'u'  for  LOG_USER, or
              '0'-'7'  for   LOG_LOCAL0   through
              LOG_LOCAL7).

       There  are  also  "upper case" versions of
       each of these  options,  which  allow  the
       corresponding   logging  mechanism  to  be
       restricted to certain priorities  of  mes-
       sage.   Using standard error logging as an
       example:

       -LE pri
              will log messages of priority 'pri'
              and above to standard error.

       -LE p1-p2
              will  log  messages  with  priority
              between 'p1' and  'p2'  (inclusive)
              to standard error.

       For -LF and -LS the priority specification
       comes before the file or  facility  token.
       The priorities recognised are:

              0 or !  for LOG_EMERG,
              1 or a for LOG_ALERT,
              2 or c for LOG_CRIT,
              3 or e for LOG_ERR,
              4 or w for LOG_WARNING,
              5 or n for LOG_NOTICE,
              6 or i for LOG_INFO, and
              7 or d for LOG_DEBUG.

       Normal output is (or will be!) logged at a
       priority level of LOG_NOTICE

The default command line is:

/usr/sbin/snmptrapd -A -LF n /var/log/net-snmpd.log \
 -p /var/run/snmptrapd.pid

The manual explains -Lf, but not -LF. From my tests, Lf seems to be a
pipe, LF a file.

-- 
Cheers / Saludos,

		Carlos E. R.
		(from 13.1 x86_64 "Bottle" at Telcontar)