Changes between Version 2 and Version 3 of TracLogging


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Timestamp:
Aug 22, 2019, 8:54:37 AM (5 years ago)
Author:
trac
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  • TracLogging

    v2 v3  
    1 = Trac Logging =
     1= Trac Logging
    22[[TracGuideToc]]
    33
    4 Trac supports logging of system messages using the standard [http://docs.python.org/lib/module-logging.html logging module] that comes with Python.
     4Trac supports logging of system messages using Python's [https://docs.python.org/2/library/logging.html logging module].
    55
    6 Logging is configured in the `[logging]` section in [wiki:TracIni#logging-section trac.ini].
     6Logging is configured in the [TracIni#logging-section "[logging]"] section of TracIni.
    77
    8 == Supported Logging Methods ==
     8== Supported Logging Methods
    99
    10 The log method is set using the `log_type` option in [wiki:TracIni#logging-section trac.ini], which takes any of the following values:
     10The log method is set using the [TracIni#logging-log_type-option "[logging] log_type"] option, which accepts the following values:
    1111
    1212 '''none'':: Suppress all log messages.
    13  '''file''':: Log messages to a file, specified with the `log_file` option in [wiki:TracIni#logging-section trac.ini]. Relative paths in `log_file` are resolved relative to the `log` directory of the environment.
    14  '''stderr''':: Output all log entries to console ([wiki:TracStandalone tracd] only).
    15  '''syslog''':: (UNIX) Send all log messages to the local syslogd via named pipe `/dev/log`. By default, syslog will write them to the file /var/log/messages.
    16  '''eventlog''':: (Windows) Use the system's NT Event Log for Trac logging.
     13 '''file''':: Log messages to a file, specified with the [TracIni#logging-log_file-option "[logging] log_file"] option. Relative paths for `log_file` are resolved relative to the environment `log` directory.
     14 '''stderr''':: Output log entries to console ([TracStandalone tracd] only).
     15 '''syslog''':: (UNIX) Send log messages to the local syslogd via named pipe `/dev/log`. By default, syslog will write them to the `/var/log/messages` file.
     16 '''eventlog''':: (Windows) Use the system's NT Event Log.
    1717
    18 == Log Levels ==
     18== Log Levels
    1919
    20 The verbosity level of logged messages can be set using the `log_level` option in [wiki:TracIni#logging-section trac.ini]. The log level defines the minimum level of urgency required for a message to be logged, and those levels are:
     20The verbosity level of logged messages can be set using the [TracIni#logging-log_level-option "[logging] log_level"] option. The log level defines the minimum level of urgency required for a message to be logged, and those levels are:
    2121
    2222 '''CRITICAL''':: Log only the most critical (typically fatal) errors.
    … …  
    2626 '''DEBUG''':: Trace messages, profiling, etc.
    2727
    28 Note that starting with Trac 0.11.5 you can in addition enable logging of SQL statements, at debug level. This is turned off by default, as it's very verbose (set `[trac] debug_sql = yes` in TracIni to activate).
     28Additionally, you can  enable logging of SQL statements at debug level. This is turned off by default, as it's very verbose. Set [TracIni#trac-debug_sql-option "[trac] debug_sql  = yes"] to activate.
    2929
    30 == Log Format ==
     30== Log Format
    3131
    32 Starting with Trac 0.10.4 (see [trac:#2844 #2844]), it is possible to set the output format for log entries. This can be done through the `log_format` option in [wiki:TracIni#logging-section trac.ini]. The format is a string which can contain any of the [http://docs.python.org/lib/node422.html Python logging Formatter variables]. Additonally, the following Trac-specific variables can be used:
    33  '''$(basename)s''':: The last path component of the current environment.
    34  '''$(path)s''':: The absolute path for the current environment.
     32The output format for log entries can be specified in the [TracIni#logging-log_format-option "[logging] log_format"] option. The format is a string which can contain any of the [https://docs.python.org/2/library/logging.html#logrecord-attributes Python logging Formatter variables]. Additionally, the following Trac-specific variables can be used:
     33 '''$(basename)s''':: The environment directory name.
     34 '''$(path)s''':: The absolute path of the environment directory.
    3535 '''$(project)s''':: The originating project's name.
    3636
    … …  
    3838
    3939The default format is:
    40 {{{
     40{{{#!ini
    4141log_format = Trac[$(module)s] $(levelname)s: $(message)s
    4242}}}
    4343
    4444In a multi-project environment where all logs are sent to the same place (e.g. `syslog`), it makes sense to add the project name. In this example we use `basename` since that can generally be used to identify a project:
    45 {{{
     45{{{#!ini
    4646log_format = Trac[$(basename)s:$(module)s] $(levelname)s: $(message)s
    4747}}}
    4848
    4949----
    50 See also: TracIni, TracGuide, TracEnvironment
     50See also: TracIni, TracEnvironment