Chapter 14. placement

debug = False

boolean value

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

default_log_levels = ['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 value

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

fatal_deprecations = False

boolean value

Enables or disables fatal status of deprecations.

`instance_format = [instance: %(uuid)s] `

string value

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

`instance_uuid_format = [instance: %(uuid)s] `

string value

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

log-config-append = None

string value

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).

log-date-format = %Y-%m-%d %H:%M:%S

string value

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

log-dir = None

string value

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

log-file = None

string value

(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.

log_rotate_interval = 1

integer value

The amount of time before the log files are rotated. This option is ignored unless log_rotation_type is setto "interval".

log_rotate_interval_type = days

string value

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.

log_rotation_type = none

string value

Log rotation type.

logging_context_format_string = %(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s [%(request_id)s %(user_identity)s] %(instance)s%(message)s

string value

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

logging_debug_format_suffix = %(funcName)s %(pathname)s:%(lineno)d

string value

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

logging_default_format_string = %(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s [-] %(instance)s%(message)s

string value

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

logging_exception_prefix = %(asctime)s.%(msecs)03d %(process)d ERROR %(name)s %(instance)s

string value

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

logging_user_identity_format = %(user)s %(tenant)s %(domain)s %(user_domain)s %(project_domain)s

string value

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

max_logfile_count = 30

integer value

Maximum number of rotated log files.

max_logfile_size_mb = 200

integer value

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

publish_errors = False

boolean value

Enables or disables publication of error events.

pybasedir = /usr/lib/python3.9/site-packages

string value

The directory where the Placement python modules are installed.

This is the default path for other config options which need to persist Placement internal data. It is very unlikely that you need to change this option from its default value.

Possible values:

Related options:

rate_limit_burst = 0

integer value

Maximum number of logged messages per rate_limit_interval.

rate_limit_except_level = CRITICAL

string value

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.

rate_limit_interval = 0

integer value

Interval, number of seconds, of log rate limiting.

state_path = $pybasedir

string value

The top-level directory for maintaining state used in Placement.

This directory is used to store Placement’s internal state. It is used by some tests that have behaviors carried over from Nova.

Possible values:

syslog-log-facility = LOG_USER

string value

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

tempdir = None

string value

Explicitly specify the temporary working directory.

use-journal = False

boolean value

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.

use-json = False

boolean value

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

use-syslog = False

boolean value

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_eventlog = False

boolean value

Log output to Windows Event Log.

use_stderr = False

boolean value

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

watch-log-file = False

boolean value

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.

auth_strategy = keystone

string value

This determines the strategy to use for authentication: keystone or noauth2. noauth2 is designed for testing only, as it does no actual credential checking. noauth2 provides administrative credentials only if admin is specified as the username.

allow_credentials = True

boolean value

Indicate that the actual request can include user credentials

allow_headers = []

list value

Indicate which header field names may be used during the actual request.

allow_methods = ['OPTIONS', 'GET', 'HEAD', 'POST', 'PUT', 'DELETE', 'TRACE', 'PATCH']

list value

Indicate which methods can be used during the actual request.

allowed_origin = None

list value

Indicate whether this resource may be shared with the domain received in the requests "origin" header. Format: "<protocol>://<host>[:<port>]", no trailing slash. Example: https://horizon.example.com

expose_headers = []

list value

Indicate which headers are safe to expose to the API. Defaults to HTTP Simple Headers.

max_age = 3600

integer value

Maximum cache age of CORS preflight requests.

auth_section = None

string value

Config Section from which to load plugin specific options

auth_type = None

string value

Authentication type to load

auth_uri = None

string value

Complete "public" Identity API endpoint. This endpoint should not be an "admin" endpoint, as it should be accessible by all end users. Unauthenticated clients are redirected to this endpoint to authenticate. Although this endpoint should ideally be unversioned, client support in the wild varies. If you’re using a versioned v2 endpoint here, then this should not be the same endpoint the service user utilizes for validating tokens, because normal end users may not be able to reach that endpoint. This option is deprecated in favor of www_authenticate_uri and will be removed in the S release. Deprecated since: Queens

*Reason:*The auth_uri option is deprecated in favor of www_authenticate_uri and will be removed in the S release.

auth_version = None

string value

API version of the Identity API endpoint.

cache = None

string value

Request environment key where the Swift cache object is stored. When auth_token middleware is deployed with a Swift cache, use this option to have the middleware share a caching backend with swift. Otherwise, use the memcached_servers option instead.

cafile = None

string value

A PEM encoded Certificate Authority to use when verifying HTTPs connections. Defaults to system CAs.

certfile = None

string value

Required if identity server requires client certificate

delay_auth_decision = False

boolean value

Do not handle authorization requests within the middleware, but delegate the authorization decision to downstream WSGI components.

enforce_token_bind = permissive

string value

Used to control the use and type of token binding. Can be set to: "disabled" to not check token binding. "permissive" (default) to validate binding information if the bind type is of a form known to the server and ignore it if not. "strict" like "permissive" but if the bind type is unknown the token will be rejected. "required" any form of token binding is needed to be allowed. Finally the name of a binding method that must be present in tokens.

http_connect_timeout = None

integer value

Request timeout value for communicating with Identity API server.

http_request_max_retries = 3

integer value

How many times are we trying to reconnect when communicating with Identity API Server.

include_service_catalog = True

boolean value

(Optional) Indicate whether to set the X-Service-Catalog header. If False, middleware will not ask for service catalog on token validation and will not set the X-Service-Catalog header.

insecure = False

boolean value

Verify HTTPS connections.

interface = internal

string value

Interface to use for the Identity API endpoint. Valid values are "public", "internal" (default) or "admin".

keyfile = None

string value

Required if identity server requires client certificate

memcache_pool_conn_get_timeout = 10

integer value

(Optional) Number of seconds that an operation will wait to get a memcached client connection from the pool.

memcache_pool_dead_retry = 300

integer value

(Optional) Number of seconds memcached server is considered dead before it is tried again.

memcache_pool_maxsize = 10

integer value

(Optional) Maximum total number of open connections to every memcached server.

memcache_pool_socket_timeout = 3

integer value

(Optional) Socket timeout in seconds for communicating with a memcached server.

memcache_pool_unused_timeout = 60

integer value

(Optional) Number of seconds a connection to memcached is held unused in the pool before it is closed.

memcache_secret_key = None

string value

(Optional, mandatory if memcache_security_strategy is defined) This string is used for key derivation.

memcache_security_strategy = None

string value

(Optional) If defined, indicate whether token data should be authenticated or authenticated and encrypted. If MAC, token data is authenticated (with HMAC) in the cache. If ENCRYPT, token data is encrypted and authenticated in the cache. If the value is not one of these options or empty, auth_token will raise an exception on initialization.

memcache_use_advanced_pool = False

boolean value

(Optional) Use the advanced (eventlet safe) memcached client pool. The advanced pool will only work under python 2.x.

memcached_servers = None

list value

Optionally specify a list of memcached server(s) to use for caching. If left undefined, tokens will instead be cached in-process.

region_name = None

string value

The region in which the identity server can be found.

service_token_roles = ['service']

list value

A choice of roles that must be present in a service token. Service tokens are allowed to request that an expired token can be used and so this check should tightly control that only actual services should be sending this token. Roles here are applied as an ANY check so any role in this list must be present. For backwards compatibility reasons this currently only affects the allow_expired check.

service_token_roles_required = False

boolean value

For backwards compatibility reasons we must let valid service tokens pass that don’t pass the service_token_roles check as valid. Setting this true will become the default in a future release and should be enabled if possible.

service_type = None

string value

The name or type of the service as it appears in the service catalog. This is used to validate tokens that have restricted access rules.

token_cache_time = 300

integer value

In order to prevent excessive effort spent validating tokens, the middleware caches previously-seen tokens for a configurable duration (in seconds). Set to -1 to disable caching completely.

www_authenticate_uri = None

string value

Complete "public" Identity API endpoint. This endpoint should not be an "admin" endpoint, as it should be accessible by all end users. Unauthenticated clients are redirected to this endpoint to authenticate. Although this endpoint should ideally be unversioned, client support in the wild varies. If you’re using a versioned v2 endpoint here, then this should not be the same endpoint the service user utilizes for validating tokens, because normal end users may not be able to reach that endpoint.

enable_proxy_headers_parsing = False

boolean value

Whether the application is behind a proxy or not. This determines if the middleware should parse the headers or not.

enforce_new_defaults = False

boolean value

This option controls whether or not to use old deprecated defaults when evaluating policies. If True, the old deprecated defaults are not going to be evaluated. This means if any existing token is allowed for old defaults but is disallowed for new defaults, it will be disallowed. It is encouraged to enable this flag along with the enforce_scope flag so that you can get the benefits of new defaults and scope_type together

enforce_scope = False

boolean value

This option controls whether or not to enforce scope when evaluating policies. If True, the scope of the token used in the request is compared to the scope_types of the policy being enforced. If the scopes do not match, an InvalidScope exception will be raised. If False, a message will be logged informing operators that policies are being invoked with mismatching scope.

policy_default_rule = default

string value

Default rule. Enforced when a requested rule is not found.

policy_dirs = ['policy.d']

multi valued

Directories where policy configuration files are stored. They can be relative to any directory in the search path defined by the config_dir option, or absolute paths. The file defined by policy_file must exist for these directories to be searched. Missing or empty directories are ignored.

policy_file = policy.json

string value

The relative or absolute path of a file that maps roles to permissions for a given service. Relative paths must be specified in relation to the configuration file setting this option.

remote_content_type = application/x-www-form-urlencoded

string value

Content Type to send and receive data for REST based policy check

remote_ssl_ca_crt_file = None

string value

Absolute path to ca cert file for REST based policy check

remote_ssl_client_crt_file = None

string value

Absolute path to client cert for REST based policy check

remote_ssl_client_key_file = None

string value

Absolute path client key file REST based policy check

remote_ssl_verify_server_crt = False

boolean value

server identity verification for REST based policy check

allocation_conflict_retry_count = 10

integer value

The number of times to retry, server-side, writing allocations when there is a resource provider generation conflict. Raising this value may be useful when many concurrent allocations to the same resource provider are expected.

incomplete_consumer_project_id = 00000000-0000-0000-0000-000000000000

string value

Early API microversions (<1.8) allowed creating allocations and not specifying a project or user identifier for the consumer. In cleaning up the data modeling, we no longer allow missing project and user information. If an older client makes an allocation, we’ll use this in place of the information it doesn’t provide.

incomplete_consumer_user_id = 00000000-0000-0000-0000-000000000000

string value

Early API microversions (<1.8) allowed creating allocations and not specifying a project or user identifier for the consumer. In cleaning up the data modeling, we no longer allow missing project and user information. If an older client makes an allocation, we’ll use this in place of the information it doesn’t provide.

randomize_allocation_candidates = False

boolean value

If True, when limiting allocation candidate results, the results will be a random sampling of the full result set. If False, allocation candidates are returned in a deterministic but undefined order. That is, all things being equal, two requests for allocation candidates will return the same results in the same order; but no guarantees are made as to how that order is determined.

connection = None

string value

The SQLAlchemy connection string to use to connect to the database.

connection_debug = 0

integer value

Verbosity of SQL debugging information: 0=None, 100=Everything.

`connection_parameters = `

string value

Optional URL parameters to append onto the connection URL at connect time; specify as param1=value1&param2=value2&…​

connection_recycle_time = 3600

integer value

Connections which have been present in the connection pool longer than this number of seconds will be replaced with a new one the next time they are checked out from the pool.

connection_trace = False

boolean value

Add Python stack traces to SQL as comment strings.

max_overflow = None

integer value

If set, use this value for max_overflow with SQLAlchemy.

max_pool_size = None

integer value

Maximum number of SQL connections to keep open in a pool. Setting a value of 0 indicates no limit.

max_retries = 10

integer value

Maximum number of database connection retries during startup. Set to -1 to specify an infinite retry count.

mysql_sql_mode = TRADITIONAL

string value

The SQL mode to be used for MySQL sessions. This option, including the default, overrides any server-set SQL mode. To use whatever SQL mode is set by the server configuration, set this to no value. Example: mysql_sql_mode=

pool_timeout = None

integer value

If set, use this value for pool_timeout with SQLAlchemy.

retry_interval = 10

integer value

Interval between retries of opening a SQL connection.

slave_connection = None

string value

The SQLAlchemy connection string to use to connect to the slave database.

sqlite_synchronous = True

boolean value

If True, SQLite uses synchronous mode.

sync_on_startup = False

boolean value

If True, database schema migrations will be attempted when the web service starts.

connection_string = messaging://

string value

Connection string for a notifier backend.

Default value is messaging:// which sets the notifier to oslo_messaging.

Examples of possible values:

enabled = False

boolean value

Enable the profiling for all services on this node.

Default value is False (fully disable the profiling feature).

Possible values:

es_doc_type = notification

string value

Document type for notification indexing in elasticsearch.

es_scroll_size = 10000

integer value

Elasticsearch splits large requests in batches. This parameter defines maximum size of each batch (for example: es_scroll_size=10000).

es_scroll_time = 2m

string value

This parameter is a time value parameter (for example: es_scroll_time=2m), indicating for how long the nodes that participate in the search will maintain relevant resources in order to continue and support it.

filter_error_trace = False

boolean value

Enable filter traces that contain error/exception to a separated place.

Default value is set to False.

Possible values:

hmac_keys = SECRET_KEY

string value

Secret key(s) to use for encrypting context data for performance profiling.

This string value should have the following format: <key1>[,<key2>,…​<keyn>], where each key is some random string. A user who triggers the profiling via the REST API has to set one of these keys in the headers of the REST API call to include profiling results of this node for this particular project.

Both "enabled" flag and "hmac_keys" config options should be set to enable profiling. Also, to generate correct profiling information across all services at least one key needs to be consistent between OpenStack projects. This ensures it can be used from client side to generate the trace, containing information from all possible resources.

sentinel_service_name = mymaster

string value

Redissentinel uses a service name to identify a master redis service. This parameter defines the name (for example: sentinal_service_name=mymaster).

socket_timeout = 0.1

floating point value

Redissentinel provides a timeout option on the connections. This parameter defines that timeout (for example: socket_timeout=0.1).

trace_sqlalchemy = False

boolean value

Enable SQL requests profiling in services.

Default value is False (SQL requests won’t be traced).

Possible values: