Package ganeti :: Package utils :: Module log

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Module log

Utility functions for logging.

Classes

_ReopenableLogHandler
Log handler with ability to reopen log file on request.

Functions

_LogErrorsToConsole(base)
Create wrapper class writing errors to console.

source code

_GetLogFormatter(program, multithreaded, debug, syslog)
Build log formatter.

source code

_ReopenLogFiles(handlers)
Wrapper for reopening all log handler's files in a sequence.

source code

callable

SetupLogging(logfile, program, debug=0, stderr_logging=False, multithreaded=False, syslog=constants.SYSLOG_USAGE, console_logging=False, root_logger=None)
Configures the logging module.

source code

Variables

_LogHandler = _LogErrorsToConsole(_ReopenableLogHandler)
Custom log handler for writing to console with a reopenable handler

Imports: os, logging, constants, compat

Function Details

_LogErrorsToConsole(base)

Create wrapper class writing errors to console.

This needs to be in a function for unittesting.

_GetLogFormatter(program, multithreaded, debug, syslog)

Build log formatter.

Parameters:

program - Program name
multithreaded - Whether to add thread name to log messages
debug - Whether to enable debug messages
syslog - Whether the formatter will be used for syslog

SetupLogging(logfile, program, debug=0, stderr_logging=False, multithreaded=False, syslog=constants.SYSLOG_USAGE, console_logging=False, root_logger=None)

Configures the logging module.

Parameters:

logfile (str) - the filename to which we should log
program (str) - the name under which we should log messages
debug (integer) - if greater than zero, enable debug messages, otherwise only those at INFO and above level
stderr_logging (boolean) - whether we should also log to the standard error
multithreaded (boolean) - if True, will add the thread name to the log file
syslog (string) - one of 'no', 'yes', 'only':
- if no, syslog is not used
- if yes, syslog is used (in addition to file-logging)
- if only, only syslog is used
console_logging (boolean) - if True, will use a FileHandler which falls back to the system console if logging fails
root_logger (logging.Logger) - Root logger to use (for unittests)

Returns: callable

Function reopening all open log files when called

Raises:

EnvironmentError - if we can't open the log file and syslog/stderr logging is disabled