Mapcrafter has its own logging facility which is configurable with a global logging configuration file as well as with the normal render configuration files. You can configure Mapcrafter to log its output into a log file or a local syslog daemon.
You can find your global logging configuration file with the mapcrafter --find-resources command, but it’s usually installed as /etc/mapcrafter/logging.conf or directly available as mapcrafter/src/logging.conf (if Mapcrafter is not system/user-wide installed).
Here is a very simple example of a logging configuration file:
[log:output] type = output verbosity = INFO [log:file] type = file verbosity = INFO file = /var/log/mapcrafter.log [log:syslog] type = syslog verbosity = INFO
Every log section (prefixed with log:) configures one log sink. You can configure the logging facility with those log sections in the global logging configuration file, but you can also use those log sections in the normal render configuration files. The log sections in the normal render configuration files are used after the ones in the global logging configuration file, so you can use them to overwrite the global logging configuration.
The names of the log sections are not relevant because you specify the type of the log sink with the type option. An exception of this are file log sinks. You should make sure that you do not use the same section name for file log sinks multiple times because they are used for internal representation.
The following options are relevant for all log sink types.
type = <type>
This is the type of the log sink you want to configure. Available types are:
- This is the default log output Mapcrafter shows when you run it. It is always enabled by default.
- This sink writes all log output into a log file.
- This sink sends all log output to the local syslog daemon.
verbosity = <verbosity>
This is the verbosity of the log sink, i.e. the minimum log level a message must have to be handled by the log sink. Available log levels are (according to RFC 5424 ):
- DEBUG, INFO, NOTICE, WARNING, ERROR, FATAL, ALERT, EMERGENCY
log_progress = true|false
Default: true (except output log)
This option specifies whether the log sink should log progress messages. It is disabled by default for the output log because it is already using the animated progress bar. If you enable the --batch mode, this is also enabled for the output log and the animated progress bar is not shown.
The following options are only relevant for the output and file log sinks.
format = <format>
Default: %(date) [%(level)] [%(logger)] %(message)
This is the format log messages are formatted with. You can use the following placeholders to specify the format of the log messages:
Placeholder Meaning %(date) Current date formatted with date format. %(level) Log level of the logged message. %(logger) Logger used to log this message (usually default or progress). %(file) Source file name where this message was logged. %(line) Source file line number where this message was logged. %(message) The actually logged message.
date_format = <dateformat>
Default: %Y-%m-%d %H:%M:%S
This is the format the %(date) field is formatted with. Internally the std::strftime function is used to format the date field, so have a look at its documentation for the available placeholders.
The following option is only relevant for the file log sink.
file = <file>
This option specifies the file the file log sink should output the log messages to.