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- Timestamp:
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Feb 24, 2012, 9:39:07 AM (13 years ago)
- Author:
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trac
- Comment:
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4 | 4 | Trac supports logging of system messages using the standard [http://docs.python.org/lib/module-logging.html logging module] that comes with Python. |
5 | 5 | |
6 | | Logging is configured in the {{{[logging]}}} section in [wiki:TracIni trac.ini]. |
| 6 | Logging is configured in the `[logging]` section in [wiki:TracIni#logging-section trac.ini]. |
7 | 7 | |
8 | 8 | == Supported Logging Methods == |
9 | 9 | |
10 | | The log method is set using the `log_type` configuration option, which takes any of the following values: |
| 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: |
| 11 | |
11 | 12 | '''none'':: Suppress all log messages. |
12 | | '''file''':: Log messages to a file, specified with the `log_file` option in [wiki:TracIni trac.ini]. |
| 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. |
13 | 14 | '''stderr''':: Output all log entries to console ([wiki:TracStandalone tracd] only). |
14 | | '''syslog''':: (UNIX) Send messages to local syslogd via named pipe `/dev/log`. |
15 | | '''eventlog''':: (Windows) Use the system's NT eventlog for Trac logging. |
| 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. |
16 | 17 | |
17 | 18 | == Log Levels == |
18 | 19 | |
19 | | The verbosity level of logged messages can be set using the ''log_level'' directive in [wiki:TracIni trac.ini]. The log level defines the minimum level of urgency required for a message to be logged. |
| 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: |
20 | 21 | |
21 | | The levels are: |
22 | 22 | '''CRITICAL''':: Log only the most critical (typically fatal) errors. |
23 | 23 | '''ERROR''':: Log failures, bugs and errors. |
… |
… |
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26 | 26 | '''DEBUG''':: Trace messages, profiling, etc. |
27 | 27 | |
| 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). |
| 29 | |
| 30 | == Log Format == |
| 31 | |
| 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. |
| 35 | '''$(project)s''':: The originating project's name. |
| 36 | |
| 37 | Note that variables are identified using a dollar sign (`$(...)s`) instead of percent sign (`%(...)s`). |
| 38 | |
| 39 | The default format is: |
| 40 | {{{ |
| 41 | log_format = Trac[$(module)s] $(levelname)s: $(message)s |
| 42 | }}} |
| 43 | |
| 44 | In a multi-project environment where all logs are sent to the same place (e.g. `syslog`), it makes sense to add the project name. In this example we use `basename` since that can generally be used to identify a project: |
| 45 | {{{ |
| 46 | log_format = Trac[$(basename)s:$(module)s] $(levelname)s: $(message)s |
| 47 | }}} |
| 48 | |
28 | 49 | ---- |
29 | 50 | See also: TracIni, TracGuide, TracEnvironment |