Configuration Options

updated: 2022-10-20 13:31

Configuration Options¶

oslo.log uses oslo.config to define and manage configuration options to allow the deployer to control how an application’s logs are handled.

DEFAULT¶

debug¶

Type: boolean
Default: False
Mutable: This option can be changed without restarting.

If set to true, the logging level will be set to DEBUG instead of the default INFO level.

log_config_append¶

Type: string
Default: <None>
Mutable: This option can be changed without restarting.

The name of a logging configuration file. This file is appended to any existing logging configuration files. For details about logging configuration files, see the Python logging module documentation. Note that when logging configuration files are used then all logging configuration is set in the configuration file and other logging configuration options are ignored (for example, log-date-format).

Deprecated Variations¶
Group	Name
DEFAULT	log-config
DEFAULT	log_config

log_date_format¶

Type: string
Default: %Y-%m-%d %H:%M:%S

Defines the format string for %(asctime)s in log records. Default: the value above . This option is ignored if log_config_append is set.

log_file¶

Type: string
Default: <None>

(Optional) Name of log file to send logging output to. If no default is set, logging will go to stderr as defined by use_stderr. This option is ignored if log_config_append is set.

Deprecated Variations¶
Group	Name
DEFAULT	logfile

log_dir¶

Type: string
Default: <None>

(Optional) The base directory used for relative log_file paths. This option is ignored if log_config_append is set.

Deprecated Variations¶
Group	Name
DEFAULT	logdir

watch_log_file¶

Type: boolean
Default: False

Uses logging handler designed to watch file system. When log file is moved or removed this handler will open a new log file with specified path instantaneously. It makes sense only if log_file option is specified and Linux platform is used. This option is ignored if log_config_append is set.

use_syslog¶

Type: boolean
Default: False

Use syslog for logging. Existing syslog format is DEPRECATED and will be changed later to honor RFC5424. This option is ignored if log_config_append is set.

use_journal¶

Type: boolean
Default: False

Enable journald for logging. If running in a systemd environment you may wish to enable journal support. Doing so will use the journal native protocol which includes structured metadata in addition to log messages.This option is ignored if log_config_append is set.

syslog_log_facility¶

Type: string
Default: LOG_USER

Syslog facility to receive log lines. This option is ignored if log_config_append is set.

use_json¶

Type: boolean
Default: False

Use JSON formatting for logging. This option is ignored if log_config_append is set.

use_stderr¶

Type: boolean
Default: False

Log output to standard error. This option is ignored if log_config_append is set.

use_eventlog¶

Type: boolean
Default: False

Log output to Windows Event Log.

log_rotate_interval¶

Type: integer
Default: 1

The amount of time before the log files are rotated. This option is ignored unless log_rotation_type is set to “interval”.

log_rotate_interval_type¶

Type: string
Default: days
Valid Values: Seconds, Minutes, Hours, Days, Weekday, Midnight

Rotation interval type. The time of the last file change (or the time when the service was started) is used when scheduling the next rotation.

max_logfile_count¶

Type: integer
Default: 30

Maximum number of rotated log files.

max_logfile_size_mb¶

Type: integer
Default: 200

Log file maximum size in MB. This option is ignored if “log_rotation_type” is not set to “size”.

log_rotation_type¶

Type: string
Default: none
Valid Values: interval, size, none

Log rotation type.

Possible values

interval: Rotate logs at predefined time intervals.
size: Rotate logs once they reach a predefined size.
none: Do not rotate log files.

logging_context_format_string¶

Type: string
Default: %(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s [%(global_request_id)s %(request_id)s %(user_identity)s] %(instance)s%(message)s

Format string to use for log messages with context. Used by oslo_log.formatters.ContextFormatter

logging_default_format_string¶

Type: string
Default: %(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s [-] %(instance)s%(message)s

Format string to use for log messages when context is undefined. Used by oslo_log.formatters.ContextFormatter

logging_debug_format_suffix¶

Type: string
Default: %(funcName)s %(pathname)s:%(lineno)d

Additional data to append to log message when logging level for the message is DEBUG. Used by oslo_log.formatters.ContextFormatter

logging_exception_prefix¶

Type: string
Default: %(asctime)s.%(msecs)03d %(process)d ERROR %(name)s %(instance)s

Prefix each line of exception output with this format. Used by oslo_log.formatters.ContextFormatter

logging_user_identity_format¶

Type: string
Default: %(user)s %(project)s %(domain)s %(system_scope)s %(user_domain)s %(project_domain)s

Defines the format string for %(user_identity)s that is used in logging_context_format_string. Used by oslo_log.formatters.ContextFormatter

default_log_levels¶

Type: list
Default: ['amqp=WARN', 'amqplib=WARN', 'boto=WARN', 'qpid=WARN', 'sqlalchemy=WARN', 'suds=INFO', 'oslo.messaging=INFO', 'oslo_messaging=INFO', 'iso8601=WARN', 'requests.packages.urllib3.connectionpool=WARN', 'urllib3.connectionpool=WARN', 'websocket=WARN', 'requests.packages.urllib3.util.retry=WARN', 'urllib3.util.retry=WARN', 'keystonemiddleware=WARN', 'routes.middleware=WARN', 'stevedore=WARN', 'taskflow=WARN', 'keystoneauth=WARN', 'oslo.cache=INFO', 'oslo_policy=INFO', 'dogpile.core.dogpile=INFO']

List of package logging levels in logger=LEVEL pairs. This option is ignored if log_config_append is set.

publish_errors¶

Type: boolean
Default: False

Enables or disables publication of error events.

instance_format¶

Type: string
Default: "[instance: %(uuid)s] "

The format for an instance that is passed with the log message.

instance_uuid_format¶

Type: string
Default: "[instance: %(uuid)s] "

The format for an instance UUID that is passed with the log message.

rate_limit_interval¶

Type: integer
Default: 0

Interval, number of seconds, of log rate limiting.

rate_limit_burst¶

Type: integer
Default: 0

Maximum number of logged messages per rate_limit_interval.

rate_limit_except_level¶

Type: string
Default: CRITICAL

Log level name used by rate limiting: CRITICAL, ERROR, INFO, WARNING, DEBUG or empty string. Logs with level greater or equal to rate_limit_except_level are not filtered. An empty string means that all levels are filtered.

fatal_deprecations¶

Type: boolean
Default: False

Enables or disables fatal status of deprecations.

Format Strings and Log Record Metadata¶

oslo.log builds on top of the Python standard library logging module. The format string supports all of the built-in replacement keys provided by that library, with some additions. Some of the more useful keys are listed here. Refer to the section on LogRecord attributes in the library documentation for complete details about the built-in values.

Basic Information¶

Format key	Description
`%(message)s`	The message passed from the application code.

Time Information¶

Format key	Description
`%(asctime)s`	Human-readable time stamp of when the logging record was created, formatted as ‘2003-07-08 16:49:45,896’ (the numbers after the comma are milliseconds).
`%(isotime)s`	Human-readable time stamp of when the logging record was created, using Python’s isoformat() function in ISO 8601 format (`YYYY-MM-DDTHH:MM:SS.mmmmmm` or, if the microseconds value is 0, `YYYY-MM-DDTHH:MM:SS`).

Location Information¶

Format key	Description
`%(pathname)s`	Full name of the source file where the logging call was issued, when it is available.
`%(filename)s`	Filename portion of `pathname`.
`%(lineno)d`	Source line number where the logging call was issued, when it is available.
`%(module)s`	The module name is derived from the filename.
`%(name)s`	The name of the logger used to log the call. For OpenStack projects, this usually corresponds to the full module name (i.e., `nova.api` or `oslo_config.cfg`).

Severity Information¶

Format key	Description
`%(levelname)s`	Text logging level for the message (`DEBUG`, `INFO`, `WARNING`, `ERROR`, `CRITICAL`).
`%(levelno)s`	Numeric logging level for the message. DEBUG level messages have a lower numerical value than INFO, which have a lower value than WARNING, etc.

Error Handling Information¶

Format key	Description
`%(error_summary)s`	The name of the exception being processed and any message associated with it.

Identity Information¶

These keys are only available in OpenStack applications that also use oslo.context.

Format key	Description
`%(user_identity)s`	The pre-formatted identity information about the user. See the `logging_user_identity_format` configuration option.
`%(user_name)s`	The name of the authenticated user, if available.
`%(user)s`	The ID of the authenticated user, if available.
`%(tenant_name)s`	The name of the authenticated tenant, if available.
`%(tenant)s`	The ID of the authenticated tenant, if available.
`%(user_domain)s`	The ID of the authenticated user domain, if available.
`%(project_domain)s`	The ID of the authenticated project/tenant, if available.
`%(request_id)s`	The ID of the current request. This value can be used to tie multiple log messages together as relating to the same operation.
`%(resource_uuid)s`	The ID of the resource on which the current operation will have effect. For example, the instance, network, volume, etc.