3.3. glance-cache.conf

admin_password = None

string value

(DEPRECATED FOR REMOVAL) The administrators password. If "use_user_token" is not in effect, then admin credentials can be specified.

admin_tenant_name = None

string value

(DEPRECATED FOR REMOVAL) The tenant name of the administrative user. If "use_user_token" is not in effect, then admin tenant name can be specified.

admin_user = None

string value

(DEPRECATED FOR REMOVAL) The administrators user name. If "use_user_token" is not in effect, then admin credentials can be specified.

allow_additional_image_properties = True

boolean value

Allow users to add additional/custom properties to images.

Glance defines a standard set of properties (in its schema) that appear on every image. These properties are also known as base properties. In addition to these properties, Glance allows users to add custom properties to images. These are known as additional properties.

By default, this configuration option is set to True and users are allowed to add additional properties. The number of additional properties that can be added to an image can be controlled via image_property_quota configuration option.

Possible values:

Related options:

api_limit_max = 1000

integer value

Maximum number of results that could be returned by a request.

As described in the help text of limit_param_default, some requests may return multiple results. The number of results to be returned are governed either by the limit parameter in the request or the limit_param_default configuration option. The value in either case, can’t be greater than the absolute maximum defined by this configuration option. Anything greater than this value is trimmed down to the maximum value defined here.

Possible values:

Related options:

auth_region = None

string value

(DEPRECATED FOR REMOVAL) The region for the authentication service. If "use_user_token" is not in effect and using keystone auth, then region name can be specified.

auth_strategy = noauth

string value

(DEPRECATED FOR REMOVAL) The strategy to use for authentication. If "use_user_token" is not in effect, then auth strategy can be specified.

auth_url = None

string value

(DEPRECATED FOR REMOVAL) The URL to the keystone service. If "use_user_token" is not in effect and using keystone auth, then URL of keystone can be specified.

data_api = glance.db.sqlalchemy.api

string value

(DEPRECATED FOR REMOVAL) Python module path of data access API.

Specifies the path to the API to use for accessing the data model. This option determines how the image catalog data will be accessed.

Possible values:

If this option is set to glance.db.sqlalchemy.api then the image catalog data is stored in and read from the database via the SQLAlchemy Core and ORM APIs.

Setting this option to glance.db.registry.api will force all database access requests to be routed through the Registry service. This avoids data access from the Glance API nodes for an added layer of security, scalability and manageability.

Finally, when this configuration option is set to glance.db.simple.api, image catalog data is stored in and read from an in-memory data structure. This is primarily used for testing.

Related options:

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.

digest_algorithm = sha256

string value

Digest algorithm to use for digital signature.

Provide a string value representing the digest algorithm to use for generating digital signatures. By default, sha256 is used.

To get a list of the available algorithms supported by the version of OpenSSL on your platform, run the command: openssl list-message-digest-algorithms. Examples are sha1, sha256, and sha512.

Possible values:

Relation options:

enable_v1_registry = True

boolean value

enable_v2_api = True

boolean value

Deploy the v2 OpenStack Images API.

When this option is set to True, Glance service will respond to requests on registered endpoints conforming to the v2 OpenStack Images API.

NOTES:

Possible values:

Related options:

enable_v2_registry = True

boolean value

(DEPRECATED FOR REMOVAL) Deploy the v2 API Registry service.

When this option is set to True, the Registry service will be enabled in Glance for v2 API requests.

NOTES:

Possible values:

Related options:

enabled_import_methods = ['glance-direct', 'web-download', 'copy-image']

list value

fatal_deprecations = False

boolean value

Enables or disables fatal status of deprecations.

hashing_algorithm = sha512

string value

Secure hashing algorithm used for computing the os_hash_value property.

This option configures the Glance "multihash", which consists of two image properties: the os_hash_algo and the os_hash_value. The os_hash_algo will be populated by the value of this configuration option, and the os_hash_value will be populated by the hexdigest computed when the algorithm is applied to the uploaded or imported image data.

The value must be a valid secure hash algorithm name recognized by the python hashlib library. You can determine what these are by examining the hashlib.algorithms_available data member of the version of the library being used in your Glance installation. For interoperability purposes, however, we recommend that you use the set of secure hash names supplied by the hashlib.algorithms_guaranteed data member because those algorithms are guaranteed to be supported by the hashlib library on all platforms. Thus, any image consumer using hashlib locally should be able to verify the os_hash_value of the image.

The default value of sha512 is a performant secure hash algorithm.

If this option is misconfigured, any attempts to store image data will fail. For that reason, we recommend using the default value.

Possible values:

Related options:

image_cache_dir = None

string value

Base directory for image cache.

This is the location where image data is cached and served out of. All cached images are stored directly under this directory. This directory also contains three subdirectories, namely, incomplete, invalid and queue.

The incomplete subdirectory is the staging area for downloading images. An image is first downloaded to this directory. When the image download is successful it is moved to the base directory. However, if the download fails, the partially downloaded image file is moved to the invalid subdirectory.

The queue`subdirectory is used for queuing images for download. This is used primarily by the cache-prefetcher, which can be scheduled as a periodic task like cache-pruner and cache-cleaner, to cache images ahead of their usage. Upon receiving the request to cache an image, Glance touches a file in the `queue directory with the image id as the file name. The cache-prefetcher, when running, polls for the files in queue directory and starts downloading them in the order they were created. When the download is successful, the zero-sized file is deleted from the queue directory. If the download fails, the zero-sized file remains and it’ll be retried the next time cache-prefetcher runs.

Possible values:

Related options:

image_cache_driver = sqlite

string value

The driver to use for image cache management.

This configuration option provides the flexibility to choose between the different image-cache drivers available. An image-cache driver is responsible for providing the essential functions of image-cache like write images to/read images from cache, track age and usage of cached images, provide a list of cached images, fetch size of the cache, queue images for caching and clean up the cache, etc.

The essential functions of a driver are defined in the base class glance.image_cache.drivers.base.Driver. All image-cache drivers (existing and prospective) must implement this interface. Currently available drivers are sqlite and xattr. These drivers primarily differ in the way they store the information about cached images:

Possible values:

Related options:

image_cache_max_size = 10737418240

integer value

The upper limit on cache size, in bytes, after which the cache-pruner cleans up the image cache.

Glance caches an image when it is downloaded. Consequently, the size of the image cache grows over time as the number of downloads increases. To keep the cache size from becoming unmanageable, it is recommended to run the cache-pruner as a periodic task. When the cache pruner is kicked off, it compares the current size of image cache and triggers a cleanup if the image cache grew beyond the size specified here. After the cleanup, the size of cache is less than or equal to size specified here.

Possible values:

Related options:

image_cache_sqlite_db = cache.db

string value

The relative path to sqlite file database that will be used for image cache management.

This is a relative path to the sqlite file database that tracks the age and usage statistics of image cache. The path is relative to image cache base directory, specified by the configuration option image_cache_dir.

This is a lightweight database with just one table.

Possible values:

Related options:

image_cache_stall_time = 86400

integer value

The amount of time, in seconds, an incomplete image remains in the cache.

Incomplete images are images for which download is in progress. Please see the description of configuration option image_cache_dir for more detail. Sometimes, due to various reasons, it is possible the download may hang and the incompletely downloaded image remains in the incomplete directory. This configuration option sets a time limit on how long the incomplete images should remain in the incomplete directory before they are cleaned up. Once an incomplete image spends more time than is specified here, it’ll be removed by cache-cleaner on its next run.

It is recommended to run cache-cleaner as a periodic task on the Glance API nodes to keep the incomplete images from occupying disk space.

Possible values:

Related options:

image_location_quota = 10

integer value

Maximum number of locations allowed on an image.

Any negative value is interpreted as unlimited.

Related options:

image_member_quota = 128

integer value

Maximum number of image members per image.

This limits the maximum of users an image can be shared with. Any negative value is interpreted as unlimited.

Related options:

image_property_quota = 128

integer value

Maximum number of properties allowed on an image.

This enforces an upper limit on the number of additional properties an image can have. Any negative value is interpreted as unlimited.

Related options:

image_size_cap = 1099511627776

integer value

Maximum size of image a user can upload in bytes.

An image upload greater than the size mentioned here would result in an image creation failure. This configuration option defaults to 1099511627776 bytes (1 TiB).

NOTES:

Possible values:

image_tag_quota = 128

integer value

Maximum number of tags allowed on an image.

Any negative value is interpreted as unlimited.

Related options:

`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.

limit_param_default = 25

integer value

The default number of results to return for a request.

Responses to certain API requests, like list images, may return multiple items. The number of results returned can be explicitly controlled by specifying the limit parameter in the API request. However, if a limit parameter is not specified, this configuration value will be used as the default number of results to be returned for any API request.

NOTES:

Possible values:

Related options:

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".

metadata_encryption_key = None

string value

AES key for encrypting store location metadata.

Provide a string value representing the AES cipher to use for encrypting Glance store metadata.

Possible values:

Related options:

node_staging_uri = file:///tmp/staging/

string value

The URL provides location where the temporary data will be stored

This option is for Glance internal use only. Glance will save the image data uploaded by the user to staging endpoint during the image import process.

This option does not change the staging API endpoint by any means.

Possible values:

Related options:

publish_errors = False

boolean value

Enables or disables publication of error events.

pydev_worker_debug_host = None

host address value

Host address of the pydev server.

Provide a string value representing the hostname or IP of the pydev server to use for debugging. The pydev server listens for debug connections on this address, facilitating remote debugging in Glance.

Possible values:

Related options:

pydev_worker_debug_port = 5678

port value

Port number that the pydev server will listen on.

Provide a port number to bind the pydev server to. The pydev process accepts debug connections on this port and facilitates remote debugging in Glance.

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.

registry_client_ca_file = None

string value

(DEPRECATED FOR REMOVAL) Absolute path to the Certificate Authority file.

Provide a string value representing a valid absolute path to the certificate authority file to use for establishing a secure connection to the registry server.

Possible values:

Related options:

registry_client_cert_file = None

string value

(DEPRECATED FOR REMOVAL) Absolute path to the certificate file.

Provide a string value representing a valid absolute path to the certificate file to use for establishing a secure connection to the registry server.

Possible values:

Related options:

registry_client_insecure = False

boolean value

(DEPRECATED FOR REMOVAL) Set verification of the registry server certificate.

Provide a boolean value to determine whether or not to validate SSL connections to the registry server. By default, this option is set to False and the SSL connections are validated.

If set to True, the connection to the registry server is not validated via a certifying authority and the registry_client_ca_file option is ignored. This is the registry’s equivalent of specifying --insecure on the command line using glanceclient for the API.

Possible values:

Related options:

registry_client_key_file = None

string value

(DEPRECATED FOR REMOVAL) Absolute path to the private key file.

Provide a string value representing a valid absolute path to the private key file to use for establishing a secure connection to the registry server.

Possible values:

Related options:

registry_client_protocol = http

string value

(DEPRECATED FOR REMOVAL) Protocol to use for communication with the registry server.

Provide a string value representing the protocol to use for communication with the registry server. By default, this option is set to http and the connection is not secure.

This option can be set to https to establish a secure connection to the registry server. In this case, provide a key to use for the SSL connection using the registry_client_key_file option. Also include the CA file and cert file using the options registry_client_ca_file and registry_client_cert_file respectively.

Possible values:

Related options:

registry_client_timeout = 600

integer value

(DEPRECATED FOR REMOVAL) Timeout value for registry requests.

Provide an integer value representing the period of time in seconds that the API server will wait for a registry request to complete. The default value is 600 seconds.

A value of 0 implies that a request will never timeout.

Possible values:

Related options:

registry_host = 0.0.0.0

host address value

(DEPRECATED FOR REMOVAL) Address the registry server is hosted on.

Possible values:

Related options:

registry_port = 9191

port value

(DEPRECATED FOR REMOVAL) Port the registry server is listening on.

Possible values:

Related options:

show_image_direct_url = False

boolean value

Show direct image location when returning an image.

This configuration option indicates whether to show the direct image location when returning image details to the user. The direct image location is where the image data is stored in backend storage. This image location is shown under the image property direct_url.

When multiple image locations exist for an image, the best location is displayed based on the location strategy indicated by the configuration option location_strategy.

NOTES:

Possible values:

Related options:

show_multiple_locations = False

boolean value

(DEPRECATED FOR REMOVAL) Show all image locations when returning an image.

This configuration option indicates whether to show all the image locations when returning image details to the user. When multiple image locations exist for an image, the locations are ordered based on the location strategy indicated by the configuration opt location_strategy. The image locations are shown under the image property locations.

NOTES:

Possible values:

Related options:

syslog-log-facility = LOG_USER

string value

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

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.

use_user_token = True

boolean value

(DEPRECATED FOR REMOVAL) Whether to pass through the user token when making requests to the registry. To prevent failures with token expiration during big files upload, it is recommended to set this parameter to False.If "use_user_token" is not in effect, then admin credentials can be specified.

user_storage_quota = 0

string value

Maximum amount of image storage per tenant.

This enforces an upper limit on the cumulative storage consumed by all images of a tenant across all stores. This is a per-tenant limit.

The default unit for this configuration option is Bytes. However, storage units can be specified using case-sensitive literals B, KB, MB, GB and TB representing Bytes, KiloBytes, MegaBytes, GigaBytes and TeraBytes respectively. Note that there should not be any space between the value and unit. Value 0 signifies no quota enforcement. Negative values are invalid and result in errors.

Possible values:

Related options:

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.