Log files are stored in /var/log/nova and there is a log file for each service, for example nova-compute.log. You can format the log strings using options for the nova.log module. The options used to set format strings are: logging_context_format_string and logging_default_format_string. If the log level is set to debug, you can also specify logging_debug_format_suffix to append extra formatting. For information about what variables are available for the formatter see: http://docs.python.org/library/logging.html#formatter
You have two options for logging for OpenStack Compute based on configuration settings. In nova.conf, include the logfile option to enable logging. Alternatively you can set use_syslog=1, and then the nova daemon logs to syslog.
