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File name : 05_logging.cfg

Content :

## This yaml formated config file handles setting
## logger information.  The values that are necessary to be set
## are seen at the bottom.  The top '_log' are only used to remove
## redundency in a syslog and fallback-to-file case.
##
## The 'log_cfgs' entry defines a list of logger configs
## Each entry in the list is tried, and the first one that
## works is used.  If a log_cfg list entry is an array, it will
## be joined with '\n'.
_log:
 - &log_base |
   [loggers]
   keys=root,cloudinit
   
   [handlers]
   keys=consoleHandler,cloudLogHandler
   
   [formatters]
   keys=simpleFormatter,arg0Formatter
   
   [logger_root]
   level=DEBUG
   handlers=consoleHandler,cloudLogHandler
   
   [logger_cloudinit]
   level=DEBUG
   qualname=cloudinit
   handlers=
   propagate=1
   
   [handler_consoleHandler]
   class=StreamHandler
   level=WARNING
   formatter=arg0Formatter
   args=(sys.stderr,)
   
   [formatter_arg0Formatter]
   format=%(asctime)s - %(filename)s[%(levelname)s]: %(message)s
   
   [formatter_simpleFormatter]
   format=[CLOUDINIT] %(filename)s[%(levelname)s]: %(message)s
 - &log_file |
   [handler_cloudLogHandler]
   class=FileHandler
   level=DEBUG
   formatter=arg0Formatter
   args=('/var/log/cloud-init.log', 'a', 'UTF-8')
 - &log_syslog |
   [handler_cloudLogHandler]
   class=handlers.SysLogHandler
   level=DEBUG
   formatter=simpleFormatter
   args=("/dev/log", handlers.SysLogHandler.LOG_USER)

log_cfgs:
# Array entries in this list will be joined into a string
# that defines the configuration.
#
# If you want logs to go to syslog, uncomment the following line.
# - [ *log_base, *log_syslog ]
#
# The default behavior is to just log to a file.
# This mechanism that does not depend on a system service to operate.
 - [ *log_base, *log_file ]
# A file path can also be used.
# - /etc/log.conf

# This tells cloud-init to redirect its stdout and stderr to
# 'tee -a /var/log/cloud-init-output.log' so the user can see output
# there without needing to look on the console.
output: {all: '| tee -a /var/log/cloud-init-output.log'}