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Asterisk Log File Configuration

General purpose logging facilities in Asterisk can be configured in the logger.conf file. Within this file one is able to configure Asterisk to log messages to files and/or a syslog and even to the Asterisk console.  Note, the sections and descriptions listed below are meant to be informational and act as a guide (a "how to") when configuring logging in Asterisk.  Options with stated defaults don't have to be explicitly set as they will simply default to a designated value.

General Section:

; Customize the display of debug message time stamps
; this example is the ISO 8601 date format (yyyy-mm-dd HH:MM:SS)
; see strftime(3) Linux manual for format specifiers.  Note that there is
; also a fractional second parameter which may be used in this field.  Use
; %1q for tenths, %2q for hundredths, etc.
dateformat = %F %T.%3q   ; ISO 8601 date format with milliseconds

; Write callids to log messages (defaults to yes)
use_callids = yes

; Append the hostname to the name of the log files (defaults to no)
appendhostname = no

; Log queue events to a file (defaults to yes)
queue_log = yes

; Always log queue events to a file, even when a realtime backend is
; present (defaults to no).
queue_log_to_file = no

; Set the queue_log filename (defaults to queue_log)
queue_log_name = queue_log

; When using realtime for the queue log, use GMT for the timestamp
; instead of localtime.  (defaults to no)
queue_log_realtime_use_gmt = no

; Log rotation strategy (defaults to sequential):
; none:  Do not perform any log rotation at all.  You should make
;        very sure to set up some external log rotate mechanism
;        as the asterisk logs can get very large, very quickly.
; sequential:  Rename archived logs in order, such that the newest
;              has the highest sequence number.  When
;              exec_after_rotate is set, ${filename} will specify
;              the new archived logfile.
; rotate:  Rotate all the old files, such that the oldest has the
;          highest sequence number (this is the expected behavior
;          for Unix administrators).  When exec_after_rotate is
;          set, ${filename} will specify the original root filename.
; timestamp:  Rename the logfiles using a timestamp instead of a
;             sequence number when "logger rotate" is executed.
;             When exec_after_rotate is set, ${filename} will
;             specify the new archived logfile.
rotatestrategy = rotate

; Run a system command after rotating the files.  This is mainly
; useful for rotatestrategy=rotate. The example allows the last
; two archive files to remain uncompressed, but after that point,
; they are compressed on disk.
exec_after_rotate=gzip -9 ${filename}.2

Log Files Section:

; File names can either be relative to the standard Asterisk log directory (see "astlogdir" in
; asterisk.conf), or absolute paths that begin with '/'.
; A few file names have been reserved and are considered special, thus cannot be used and will
; not be considered as a regular file name.  These include the following:
;    syslog - logs to syslog facility
;    console - logs messages to the Asterisk root console.
; For each file name given a comma separated list of logging "level" types should be specified
; and include at least one of the following (in no particular order):
;    debug
;    notice
;    warning
;    error
;    dtmf
;    fax
;    security
;    verbose(<level>)
; The "verbose" value can take an optional integer argument that indicates the maximum level
; of verbosity to log at.  Verbose messages with higher levels than the indicated level will
; not be logged to the file.  If a verbose level is not given, verbose messages are logged
; based upon the current level set for the root console.
; The special character "*" can also be specified and represents all levels, even dynamic
; levels registered by modules after the logger has been initialized.  This means that loading
; and unloading modules that create and remove dynamic logging levels will result in these
; levels being included on filenames that have a level name of "*", without any need to
; perform a "logger reload" or similar operation.
; Note, there is no value in specifying both "*" and specific level types for a file name.
; The "*" level means ALL levels.  The only exception is if you need to specify a specific
; verbose level. e.g, "verbose(3),*".
; It is highly recommended that you DO NOT turn on debug mode when running a production system
; unless you are in the process of debugging a specific issue.  Debug mode outputs a LOT of
; extra messages and information that can and do fill up log files quickly. Most of these
; messages are hard to interpret without an understanding of the underlying code.  Do NOT report
; debug messages as code issues, unless you have a specific issue that you are attempting to debug.
; They are messages for just that -- debugging -- and do not rise to the level of something that
; merit your attention as an Asterisk administrator.  

; output notices, warnings and errors to the console
console => notice,warning,error

; output security messages to the file named "security"
security => security

; output notices, warnings and errors to the the file named "messages"
messages => notice,warning,error

; output notices, warnings, errors, verbose, dtmf, and fax to file name "full"
full => notice,warning,error,verbose,dtmf,fax

; output notices, warning, and errors to the syslog facility
syslog.local0 => notice,warning,error

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