glance-cache.conf

DEFAULT

allow_additional_image_properties
Type

boolean

Default

True

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:

  • True

  • False

Related options:

  • image_property_quota

Warning

This option is deprecated for removal since Ussuri. Its value may be silently ignored in the future.

Reason

This option is redundant. Control custom image property usage via the ‘image_property_quota’ configuration option. This option is scheduled to be removed during the Victoria development cycle.

hashing_algorithm
Type

string

Default

sha512

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:

  • Any secure hash algorithm name recognized by the Python ‘hashlib’ library

Related options:

  • None

image_member_quota
Type

integer

Default

128

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:

  • None

image_property_quota
Type

integer

Default

128

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.

NOTE: This won’t have any impact if additional properties are disabled. Please refer to allow_additional_image_properties.

Related options:

  • allow_additional_image_properties

image_tag_quota
Type

integer

Default

128

Maximum number of tags allowed on an image.

Any negative value is interpreted as unlimited.

Related options:

  • None

image_location_quota
Type

integer

Default

10

Maximum number of locations allowed on an image.

Any negative value is interpreted as unlimited.

Related options:

  • None

limit_param_default
Type

integer

Default

25

Minimum Value

1

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:

  • The value of this configuration option may not be greater than the value specified by api_limit_max.

  • Setting this to a very large value may slow down database queries and increase response times. Setting this to a very low value may result in poor user experience.

Possible values:

  • Any positive integer

Related options:

  • api_limit_max

api_limit_max
Type

integer

Default

1000

Minimum Value

1

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.

NOTE: Setting this to a very large value may slow down database

queries and increase response times. Setting this to a very low value may result in poor user experience.

Possible values:

  • Any positive integer

Related options:

  • limit_param_default

show_image_direct_url
Type

boolean

Default

False

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:

  • Revealing image locations can present a GRAVE SECURITY RISK as image locations can sometimes include credentials. Hence, this is set to False by default. Set this to True with EXTREME CAUTION and ONLY IF you know what you are doing!

  • If an operator wishes to avoid showing any image location(s) to the user, then both this option and show_multiple_locations MUST be set to False.

Possible values:

  • True

  • False

Related options:

  • show_multiple_locations

  • location_strategy

show_multiple_locations
Type

boolean

Default

False

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:

  • Revealing image locations can present a GRAVE SECURITY RISK as image locations can sometimes include credentials. Hence, this is set to False by default. Set this to True with EXTREME CAUTION and ONLY IF you know what you are doing!

  • See https://wiki.openstack.org/wiki/OSSN/OSSN-0065 for more information.

  • If an operator wishes to avoid showing any image location(s) to the user, then both this option and show_image_direct_url MUST be set to False.

Possible values:

  • True

  • False

Related options:

  • show_image_direct_url

  • location_strategy

Warning

This option is deprecated for removal since Newton. Its value may be silently ignored in the future.

Reason

Use of this option, deprecated since Newton, is a security risk and will be removed once we figure out a way to satisfy those use cases that currently require it. An earlier announcement that the same functionality can be achieved with greater granularity by using policies is incorrect. You cannot work around this option via policy configuration at the present time, though that is the direction we believe the fix will take. Please keep an eye on the Glance release notes to stay up to date on progress in addressing this issue.

image_size_cap
Type

integer

Default

1099511627776

Minimum Value

1

Maximum Value

9223372036854775808

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:

  • This value should only be increased after careful consideration and must be set less than or equal to 8 EiB (9223372036854775808).

  • This value must be set with careful consideration of the backend storage capacity. Setting this to a very low value may result in a large number of image failures. And, setting this to a very large value may result in faster consumption of storage. Hence, this must be set according to the nature of images created and storage capacity available.

Possible values:

  • Any positive number less than or equal to 9223372036854775808

user_storage_quota
Type

string

Default

0

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.

This has no effect if use_keystone_limits is enabled.

Possible values:

  • A string that is a valid concatenation of a non-negative integer representing the storage value and an optional string literal representing storage units as mentioned above.

Related options:

  • use_keystone_limits

use_keystone_limits
Type

boolean

Default

False

Utilize per-tenant resource limits registered in Keystone.

Enabling this feature will cause Glance to retrieve limits set in keystone for resource consumption and enforce them against API users. Before turning this on, the limits need to be registered in Keystone or all quotas will be considered to be zero, and thus reject all new resource requests.

These per-tenant resource limits are independent from the static global ones configured in this config file. If this is enabled, the relevant static global limits will be ignored.

pydev_worker_debug_host
Type

host address

Default

localhost

This option has a sample default set, which means that its actual default value may vary from the one documented above.

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:

  • Valid hostname

  • Valid IP address

Related options:

  • None

pydev_worker_debug_port
Type

port number

Default

5678

Minimum Value

0

Maximum Value

65535

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:

  • A valid port number

Related options:

  • None

metadata_encryption_key
Type

string

Default

<None>

AES key for encrypting store location metadata.

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

NOTE: The AES key to use must be set to a random string of length 16, 24 or 32 bytes.

Possible values:

  • String value representing a valid AES key

Related options:

  • None

digest_algorithm
Type

string

Default

sha256

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’.

NOTE: digest_algorithm is not related to Glance’s image signing and verification. It is only used to sign the universally unique identifier (UUID) as a part of the certificate file and key file validation.

Possible values:

  • An OpenSSL message digest algorithm identifier

Relation options:

  • None

node_staging_uri
Type

string

Default

file:///tmp/staging/

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.

NOTE: It is discouraged to use same path as [task]/work_dir

NOTE: ‘file://<absolute-directory-path>’ is the only option api_image_import flow will support for now.

NOTE: The staging path must be on shared filesystem available to all Glance API nodes.

Possible values:

  • String starting with ‘file://’ followed by absolute FS path

Related options:

  • [task]/work_dir

enabled_import_methods
Type

list

Default

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

List of enabled Image Import Methods

‘glance-direct’, ‘copy-image’ and ‘web-download’ are enabled by default.

Related options:

  • [DEFAULT]/node_staging_uri

enforce_secure_rbac
Type

boolean

Default

False

Enforce API access based on common persona definitions used across OpenStack. Enabling this option formalizes project-specific read/write operations, like creating private images or updating the status of shared image, behind the member role. It also formalizes a read-only variant useful for project-specific API operations, like listing private images in a project, behind the reader role.

Operators should take an opportunity to understand glance’s new image policies, audit assignments in their deployment, and update permissions using the default roles in keystone (e.g., admin, member, and reader).

Related options:

  • [oslo_policy]/enforce_new_defaults

Warning

This option is deprecated for removal since Wallaby. Its value may be silently ignored in the future.

Reason

This option has been introduced to require operators to opt into enforcing authorization based on common RBAC personas, which is EXPERIMENTAL as of the Wallaby release. This behavior will be the default and STABLE in a future release, allowing this option to be removed.

worker_self_reference_url
Type

string

Default

<None>

The URL to this worker.

If this is set, other glance workers will know how to contact this one directly if needed. For image import, a single worker stages the image and other workers need to be able to proxy the import request to the right one.

If unset, this will be considered to be public_endpoint, which normally would be set to the same value on all workers, effectively disabling the proxying behavior.

Possible values:

  • A URL by which this worker is reachable from other workers

Related options:

  • public_endpoint

image_cache_sqlite_db
Type

string

Default

cache.db

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:

  • A valid relative path to sqlite file database

Related options:

  • image_cache_dir

image_cache_driver
Type

string

Default

sqlite

Valid Values

sqlite, xattr

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:

  • The sqlite driver uses a sqlite database (which sits on every glance node locally) to track the usage of cached images.

  • The xattr driver uses the extended attributes of files to store this information. It also requires a filesystem that sets atime on the files when accessed.

Possible values:

  • sqlite

  • xattr

Related options:

  • None

image_cache_max_size
Type

integer

Default

10737418240

Minimum Value

0

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

NOTE: This is just a threshold for cache-pruner to act upon. It is NOT a hard limit beyond which the image cache would never grow. In fact, depending on how often the cache-pruner runs and how quickly the cache fills, the image cache can far exceed the size specified here very easily. Hence, care must be taken to appropriately schedule the cache-pruner and in setting this limit.

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:

  • Any non-negative integer

Related options:

  • None

image_cache_stall_time
Type

integer

Default

86400

Minimum Value

0

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:

  • Any non-negative integer

Related options:

  • None

image_cache_dir
Type

string

Default

<None>

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:

  • A valid path

Related options:

  • image_cache_sqlite_db

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 [%(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 %(tenant)s %(domain)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.

glance_store

stores
Type

list

Default

['file', 'http']

List of enabled Glance stores.

Register the storage backends to use for storing disk images as a comma separated list. The default stores enabled for storing disk images with Glance are file and http.

Possible values:
  • A comma separated list that could include:

    • file

    • http

    • swift

    • rbd

    • cinder

    • vmware

    • s3

Related Options:

  • default_store

Warning

This option is deprecated for removal since Rocky. Its value may be silently ignored in the future.

Reason

This option is deprecated against new config option enabled_backends which helps to configure multiple backend stores of different schemes. This option is scheduled for removal in the U development cycle.

default_store
Type

string

Default

file

Valid Values

file, filesystem, http, https, swift, swift+http, swift+https, swift+config, rbd, cinder, vsphere, s3

The default scheme to use for storing images.

Provide a string value representing the default scheme to use for storing images. If not set, Glance uses file as the default scheme to store images with the file store.

NOTE: The value given for this configuration option must be a valid scheme for a store registered with the stores configuration option.

Possible values:

  • file

  • filesystem

  • http

  • https

  • swift

  • swift+http

  • swift+https

  • swift+config

  • rbd

  • cinder

  • vsphere

  • s3

Related Options:

  • stores

Warning

This option is deprecated for removal since Rocky. Its value may be silently ignored in the future.

Reason

This option is deprecated against new config option default_backend which acts similar to default_store config option. This option is scheduled for removal in the U development cycle.

filesystem_store_datadir
Type

string

Default

/var/lib/glance/images

Directory to which the filesystem backend store writes images.

Upon start up, Glance creates the directory if it doesn’t already exist and verifies write access to the user under which glance-api runs. If the write access isn’t available, a BadStoreConfiguration exception is raised and the filesystem store may not be available for adding new images.

NOTE: This directory is used only when filesystem store is used as a storage backend. Either filesystem_store_datadir or filesystem_store_datadirs option must be specified in glance-api.conf. If both options are specified, a BadStoreConfiguration will be raised and the filesystem store may not be available for adding new images.

Possible values:

  • A valid path to a directory

Related options:

  • filesystem_store_datadirs

  • filesystem_store_file_perm

filesystem_store_datadirs
Type

multi-valued

Default

''

List of directories and their priorities to which the filesystem backend store writes images.

The filesystem store can be configured to store images in multiple directories as opposed to using a single directory specified by the filesystem_store_datadir configuration option. When using multiple directories, each directory can be given an optional priority to specify the preference order in which they should be used. Priority is an integer that is concatenated to the directory path with a colon where a higher value indicates higher priority. When two directories have the same priority, the directory with most free space is used. When no priority is specified, it defaults to zero.

More information on configuring filesystem store with multiple store directories can be found at https://docs.openstack.org/glance/latest/configuration/configuring.html

NOTE: This directory is used only when filesystem store is used as a storage backend. Either filesystem_store_datadir or filesystem_store_datadirs option must be specified in glance-api.conf. If both options are specified, a BadStoreConfiguration will be raised and the filesystem store may not be available for adding new images.

Possible values:
  • List of strings of the following form:

    • <a valid directory path>:<optional integer priority>

Related options:

  • filesystem_store_datadir

  • filesystem_store_file_perm

filesystem_store_metadata_file
Type

string

Default

<None>

Filesystem store metadata file.

The path to a file which contains the metadata to be returned with any location associated with the filesystem store. Once this option is set, it is used for new images created afterward only - previously existing images are not affected.

The file must contain a valid JSON object. The object should contain the keys id and mountpoint. The value for both keys should be a string.

Possible values:

  • A valid path to the store metadata file

Related options:

  • None

filesystem_store_file_perm
Type

integer

Default

0

File access permissions for the image files.

Set the intended file access permissions for image data. This provides a way to enable other services, e.g. Nova, to consume images directly from the filesystem store. The users running the services that are intended to be given access to could be made a member of the group that owns the files created. Assigning a value less then or equal to zero for this configuration option signifies that no changes be made to the default permissions. This value will be decoded as an octal digit.

For more information, please refer the documentation at https://docs.openstack.org/glance/latest/configuration/configuring.html

Possible values:

  • A valid file access permission

  • Zero

  • Any negative integer

Related options:

  • None

filesystem_store_chunk_size
Type

integer

Default

65536

Minimum Value

1

Chunk size, in bytes.

The chunk size used when reading or writing image files. Raising this value may improve the throughput but it may also slightly increase the memory usage when handling a large number of requests.

Possible Values:

  • Any positive integer value

Related options:

  • None

filesystem_thin_provisioning
Type

boolean

Default

False

Enable or not thin provisioning in this backend.

This configuration option enable the feature of not really write null byte sequences on the filesystem, the holes who can appear will automatically be interpreted by the filesystem as null bytes, and do not really consume your storage. Enabling this feature will also speed up image upload and save network trafic in addition to save space in the backend, as null bytes sequences are not sent over the network.

Possible Values:

  • True

  • False

Related options:

  • None

https_ca_certificates_file
Type

string

Default

<None>

Path to the CA bundle file.

This configuration option enables the operator to use a custom Certificate Authority file to verify the remote server certificate. If this option is set, the https_insecure option will be ignored and the CA file specified will be used to authenticate the server certificate and establish a secure connection to the server.

Possible values:

  • A valid path to a CA file

Related options:

  • https_insecure

https_insecure
Type

boolean

Default

True

Set verification of the remote server certificate.

This configuration option takes in a boolean value to determine whether or not to verify the remote server certificate. If set to True, the remote server certificate is not verified. If the option is set to False, then the default CA truststore is used for verification.

This option is ignored if https_ca_certificates_file is set. The remote server certificate will then be verified using the file specified using the https_ca_certificates_file option.

Possible values:

  • True

  • False

Related options:

  • https_ca_certificates_file

http_proxy_information
Type

dict

Default

{}

The http/https proxy information to be used to connect to the remote server.

This configuration option specifies the http/https proxy information that should be used to connect to the remote server. The proxy information should be a key value pair of the scheme and proxy, for example, http:10.0.0.1:3128. You can also specify proxies for multiple schemes by separating the key value pairs with a comma, for example, http:10.0.0.1:3128, https:10.0.0.1:1080.

Possible values:

  • A comma separated list of scheme:proxy pairs as described above

Related options:

  • None

rbd_store_chunk_size
Type

integer

Default

8

Minimum Value

1

Size, in megabytes, to chunk RADOS images into.

Provide an integer value representing the size in megabytes to chunk Glance images into. The default chunk size is 8 megabytes. For optimal performance, the value should be a power of two.

When Ceph’s RBD object storage system is used as the storage backend for storing Glance images, the images are chunked into objects of the size set using this option. These chunked objects are then stored across the distributed block data store to use for Glance.

Possible Values:

  • Any positive integer value

Related options:

  • None

rbd_store_pool
Type

string

Default

images

RADOS pool in which images are stored.

When RBD is used as the storage backend for storing Glance images, the images are stored by means of logical grouping of the objects (chunks of images) into a pool. Each pool is defined with the number of placement groups it can contain. The default pool that is used is ‘images’.

More information on the RBD storage backend can be found here: http://ceph.com/planet/how-data-is-stored-in-ceph-cluster/

Possible Values:

  • A valid pool name

Related options:

  • None

rbd_store_user
Type

string

Default

<None>

RADOS user to authenticate as.

This configuration option takes in the RADOS user to authenticate as. This is only needed when RADOS authentication is enabled and is applicable only if the user is using Cephx authentication. If the value for this option is not set by the user or is set to None, a default value will be chosen, which will be based on the client. section in rbd_store_ceph_conf.

Possible Values:

  • A valid RADOS user

Related options:

  • rbd_store_ceph_conf

rbd_store_ceph_conf
Type

string

Default

''

Ceph configuration file path.

This configuration option specifies the path to the Ceph configuration file to be used. If the value for this option is not set by the user or is set to the empty string, librados will read the standard ceph.conf file by searching the default Ceph configuration file locations in sequential order. See the Ceph documentation for details.

NOTE: If using Cephx authentication, this file should include a reference to the right keyring in a client.<USER> section

NOTE 2: If you leave this option empty (the default), the actual Ceph configuration file used may change depending on what version of librados is being used. If it is important for you to know exactly which configuration file is in effect, you may specify that file here using this option.

Possible Values:

  • A valid path to a configuration file

Related options:

  • rbd_store_user

rados_connect_timeout
Type

integer

Default

0

Timeout value for connecting to Ceph cluster.

This configuration option takes in the timeout value in seconds used when connecting to the Ceph cluster i.e. it sets the time to wait for glance-api before closing the connection. This prevents glance-api hangups during the connection to RBD. If the value for this option is set to less than or equal to 0, no timeout is set and the default librados value is used.

Possible Values:

  • Any integer value

Related options:

  • None

rbd_thin_provisioning
Type

boolean

Default

False

Enable or not thin provisioning in this backend.

This configuration option enable the feature of not really write null byte sequences on the RBD backend, the holes who can appear will automatically be interpreted by Ceph as null bytes, and do not really consume your storage. Enabling this feature will also speed up image upload and save network trafic in addition to save space in the backend, as null bytes sequences are not sent over the network.

Possible Values:

  • True

  • False

Related options:

  • None

swift_store_auth_insecure
Type

boolean

Default

False

Set verification of the server certificate.

This boolean determines whether or not to verify the server certificate. If this option is set to True, swiftclient won’t check for a valid SSL certificate when authenticating. If the option is set to False, then the default CA truststore is used for verification.

Possible values:

  • True

  • False

Related options:

  • swift_store_cacert

swift_store_cacert
Type

string

Default

/etc/ssl/certs/ca-certificates.crt

This option has a sample default set, which means that its actual default value may vary from the one documented above.

Path to the CA bundle file.

This configuration option enables the operator to specify the path to a custom Certificate Authority file for SSL verification when connecting to Swift.

Possible values:

  • A valid path to a CA file

Related options:

  • swift_store_auth_insecure

swift_store_region
Type

string

Default

RegionTwo

This option has a sample default set, which means that its actual default value may vary from the one documented above.

The region of Swift endpoint to use by Glance.

Provide a string value representing a Swift region where Glance can connect to for image storage. By default, there is no region set.

When Glance uses Swift as the storage backend to store images for a specific tenant that has multiple endpoints, setting of a Swift region with swift_store_region allows Glance to connect to Swift in the specified region as opposed to a single region connectivity.

This option can be configured for both single-tenant and multi-tenant storage.

NOTE: Setting the region with swift_store_region is tenant-specific and is necessary only if the tenant has multiple endpoints across different regions.

Possible values:

  • A string value representing a valid Swift region.

Related Options:

  • None

swift_store_endpoint
Type

string

Default

https://swift.openstack.example.org/v1/path_not_including_container_name

This option has a sample default set, which means that its actual default value may vary from the one documented above.

The URL endpoint to use for Swift backend storage.

Provide a string value representing the URL endpoint to use for storing Glance images in Swift store. By default, an endpoint is not set and the storage URL returned by auth is used. Setting an endpoint with swift_store_endpoint overrides the storage URL and is used for Glance image storage.

NOTE: The URL should include the path up to, but excluding the container. The location of an object is obtained by appending the container and object to the configured URL.

Possible values:

  • String value representing a valid URL path up to a Swift container

Related Options:

  • None

swift_store_endpoint_type
Type

string

Default

publicURL

Valid Values

publicURL, adminURL, internalURL

Endpoint Type of Swift service.

This string value indicates the endpoint type to use to fetch the Swift endpoint. The endpoint type determines the actions the user will be allowed to perform, for instance, reading and writing to the Store. This setting is only used if swift_store_auth_version is greater than 1.

Possible values:

  • publicURL

  • adminURL

  • internalURL

Related options:

  • swift_store_endpoint

swift_store_service_type
Type

string

Default

object-store

Type of Swift service to use.

Provide a string value representing the service type to use for storing images while using Swift backend storage. The default service type is set to object-store.

NOTE: If swift_store_auth_version is set to 2, the value for this configuration option needs to be object-store. If using a higher version of Keystone or a different auth scheme, this option may be modified.

Possible values:

  • A string representing a valid service type for Swift storage.

Related Options:

  • None

swift_store_container
Type

string

Default

glance

Name of single container to store images/name prefix for multiple containers

When a single container is being used to store images, this configuration option indicates the container within the Glance account to be used for storing all images. When multiple containers are used to store images, this will be the name prefix for all containers. Usage of single/multiple containers can be controlled using the configuration option swift_store_multiple_containers_seed.

When using multiple containers, the containers will be named after the value set for this configuration option with the first N chars of the image UUID as the suffix delimited by an underscore (where N is specified by swift_store_multiple_containers_seed).

Example: if the seed is set to 3 and swift_store_container = glance, then an image with UUID fdae39a1-bac5-4238-aba4-69bcc726e848 would be placed in the container glance_fda. All dashes in the UUID are included when creating the container name but do not count toward the character limit, so when N=10 the container name would be glance_fdae39a1-ba.

Possible values:

  • If using single container, this configuration option can be any string that is a valid swift container name in Glance’s Swift account

  • If using multiple containers, this configuration option can be any string as long as it satisfies the container naming rules enforced by Swift. The value of swift_store_multiple_containers_seed should be taken into account as well.

Related options:

  • swift_store_multiple_containers_seed

  • swift_store_multi_tenant

  • swift_store_create_container_on_put

swift_store_large_object_size
Type

integer

Default

5120

Minimum Value

1

The size threshold, in MB, after which Glance will start segmenting image data.

Swift has an upper limit on the size of a single uploaded object. By default, this is 5GB. To upload objects bigger than this limit, objects are segmented into multiple smaller objects that are tied together with a manifest file. For more detail, refer to https://docs.openstack.org/swift/latest/overview_large_objects.html

This configuration option specifies the size threshold over which the Swift driver will start segmenting image data into multiple smaller files. Currently, the Swift driver only supports creating Dynamic Large Objects.

NOTE: This should be set by taking into account the large object limit enforced by the Swift cluster in consideration.

Possible values:

  • A positive integer that is less than or equal to the large object limit enforced by the Swift cluster in consideration.

Related options:

  • swift_store_large_object_chunk_size

swift_store_large_object_chunk_size
Type

integer

Default

200

Minimum Value

1

The maximum size, in MB, of the segments when image data is segmented.

When image data is segmented to upload images that are larger than the limit enforced by the Swift cluster, image data is broken into segments that are no bigger than the size specified by this configuration option. Refer to swift_store_large_object_size for more detail.

For example: if swift_store_large_object_size is 5GB and swift_store_large_object_chunk_size is 1GB, an image of size 6.2GB will be segmented into 7 segments where the first six segments will be 1GB in size and the seventh segment will be 0.2GB.

Possible values:

  • A positive integer that is less than or equal to the large object limit enforced by Swift cluster in consideration.

Related options:

  • swift_store_large_object_size

swift_store_create_container_on_put
Type

boolean

Default

False

Create container, if it doesn’t already exist, when uploading image.

At the time of uploading an image, if the corresponding container doesn’t exist, it will be created provided this configuration option is set to True. By default, it won’t be created. This behavior is applicable for both single and multiple containers mode.

Possible values:

  • True

  • False

Related options:

  • None

swift_store_multi_tenant
Type

boolean

Default

False

Store images in tenant’s Swift account.

This enables multi-tenant storage mode which causes Glance images to be stored in tenant specific Swift accounts. If this is disabled, Glance stores all images in its own account. More details multi-tenant store can be found at https://wiki.openstack.org/wiki/GlanceSwiftTenantSpecificStorage

NOTE: If using multi-tenant swift store, please make sure that you do not set a swift configuration file with the ‘swift_store_config_file’ option.

Possible values:

  • True

  • False

Related options:

  • swift_store_config_file

swift_store_multiple_containers_seed
Type

integer

Default

0

Minimum Value

0

Maximum Value

32

Seed indicating the number of containers to use for storing images.

When using a single-tenant store, images can be stored in one or more than one containers. When set to 0, all images will be stored in one single container. When set to an integer value between 1 and 32, multiple containers will be used to store images. This configuration option will determine how many containers are created. The total number of containers that will be used is equal to 16^N, so if this config option is set to 2, then 16^2=256 containers will be used to store images.

Please refer to swift_store_container for more detail on the naming convention. More detail about using multiple containers can be found at https://specs.openstack.org/openstack/glance-specs/specs/kilo/swift-store-multiple-containers.html

NOTE: This is used only when swift_store_multi_tenant is disabled.

Possible values:

  • A non-negative integer less than or equal to 32

Related options:

  • swift_store_container

  • swift_store_multi_tenant

  • swift_store_create_container_on_put

swift_store_admin_tenants
Type

list

Default

[]

List of tenants that will be granted admin access.

This is a list of tenants that will be granted read/write access on all Swift containers created by Glance in multi-tenant mode. The default value is an empty list.

Possible values:

  • A comma separated list of strings representing UUIDs of Keystone projects/tenants

Related options:

  • None

swift_store_ssl_compression
Type

boolean

Default

True

SSL layer compression for HTTPS Swift requests.

Provide a boolean value to determine whether or not to compress HTTPS Swift requests for images at the SSL layer. By default, compression is enabled.

When using Swift as the backend store for Glance image storage, SSL layer compression of HTTPS Swift requests can be set using this option. If set to False, SSL layer compression of HTTPS Swift requests is disabled. Disabling this option may improve performance for images which are already in a compressed format, for example, qcow2.

Possible values:

  • True

  • False

Related Options:

  • None

swift_store_retry_get_count
Type

integer

Default

0

Minimum Value

0

The number of times a Swift download will be retried before the request fails.

Provide an integer value representing the number of times an image download must be retried before erroring out. The default value is zero (no retry on a failed image download). When set to a positive integer value, swift_store_retry_get_count ensures that the download is attempted this many more times upon a download failure before sending an error message.

Possible values:

  • Zero

  • Positive integer value

Related Options:

  • None

swift_store_expire_soon_interval
Type

integer

Default

60

Minimum Value

0

Time in seconds defining the size of the window in which a new token may be requested before the current token is due to expire.

Typically, the Swift storage driver fetches a new token upon the expiration of the current token to ensure continued access to Swift. However, some Swift transactions (like uploading image segments) may not recover well if the token expires on the fly.

Hence, by fetching a new token before the current token expiration, we make sure that the token does not expire or is close to expiry before a transaction is attempted. By default, the Swift storage driver requests for a new token 60 seconds or less before the current token expiration.

Possible values:

  • Zero

  • Positive integer value

Related Options:

  • None

swift_store_use_trusts
Type

boolean

Default

True

Use trusts for multi-tenant Swift store.

This option instructs the Swift store to create a trust for each add/get request when the multi-tenant store is in use. Using trusts allows the Swift store to avoid problems that can be caused by an authentication token expiring during the upload or download of data.

By default, swift_store_use_trusts is set to True``(use of trusts is enabled). If set to ``False, a user token is used for the Swift connection instead, eliminating the overhead of trust creation.

NOTE: This option is considered only when swift_store_multi_tenant is set to True

Possible values:

  • True

  • False

Related options:

  • swift_store_multi_tenant

swift_buffer_on_upload
Type

boolean

Default

False

Buffer image segments before upload to Swift.

Provide a boolean value to indicate whether or not Glance should buffer image data to disk while uploading to swift. This enables Glance to resume uploads on error.

NOTES: When enabling this option, one should take great care as this increases disk usage on the API node. Be aware that depending upon how the file system is configured, the disk space used for buffering may decrease the actual disk space available for the glance image cache. Disk utilization will cap according to the following equation: (swift_store_large_object_chunk_size * workers * 1000)

Possible values:

  • True

  • False

Related options:

  • swift_upload_buffer_dir

default_swift_reference
Type

string

Default

ref1

Reference to default Swift account/backing store parameters.

Provide a string value representing a reference to the default set of parameters required for using swift account/backing store for image storage. The default reference value for this configuration option is ‘ref1’. This configuration option dereferences the parameters and facilitates image storage in Swift storage backend every time a new image is added.

Possible values:

  • A valid string value

Related options:

  • None

swift_store_auth_version
Type

string

Default

2

Version of the authentication service to use. Valid versions are 2 and 3 for keystone and 1 (deprecated) for swauth and rackspace.

Warning

This option is deprecated for removal. Its value may be silently ignored in the future.

Reason

The option ‘auth_version’ in the Swift back-end configuration file is used instead.

swift_store_auth_address
Type

string

Default

<None>

The address where the Swift authentication service is listening.

Warning

This option is deprecated for removal. Its value may be silently ignored in the future.

Reason

The option ‘auth_address’ in the Swift back-end configuration file is used instead.

swift_store_user
Type

string

Default

<None>

The user to authenticate against the Swift authentication service.

Warning

This option is deprecated for removal. Its value may be silently ignored in the future.

Reason

The option ‘user’ in the Swift back-end configuration file is set instead.

swift_store_key
Type

string

Default

<None>

Auth key for the user authenticating against the Swift authentication service.

Warning

This option is deprecated for removal. Its value may be silently ignored in the future.

Reason

The option ‘key’ in the Swift back-end configuration file is used to set the authentication key instead.

swift_store_config_file
Type

string

Default

<None>

Absolute path to the file containing the swift account(s) configurations.

Include a string value representing the path to a configuration file that has references for each of the configured Swift account(s)/backing stores. By default, no file path is specified and customized Swift referencing is disabled. Configuring this option is highly recommended while using Swift storage backend for image storage as it avoids storage of credentials in the database.

NOTE: Please do not configure this option if you have set swift_store_multi_tenant to True.

Possible values:

  • String value representing an absolute path on the glance-api node

Related options:

  • swift_store_multi_tenant

swift_upload_buffer_dir
Type

string

Default

<None>

Directory to buffer image segments before upload to Swift.

Provide a string value representing the absolute path to the directory on the glance node where image segments will be buffered briefly before they are uploaded to swift.

NOTES:

  • This is required only when the configuration option swift_buffer_on_upload is set to True.

  • This directory should be provisioned keeping in mind the swift_store_large_object_chunk_size and the maximum number of images that could be uploaded simultaneously by a given glance node.

Possible values:

  • String value representing an absolute directory path

Related options:

  • swift_buffer_on_upload

  • swift_store_large_object_chunk_size

vmware_server_host
Type

host address

Default

127.0.0.1

This option has a sample default set, which means that its actual default value may vary from the one documented above.

Address of the ESX/ESXi or vCenter Server target system.

This configuration option sets the address of the ESX/ESXi or vCenter Server target system. This option is required when using the VMware storage backend. The address can contain an IP address (127.0.0.1) or a DNS name (www.my-domain.com).

Possible Values:

  • A valid IPv4 or IPv6 address

  • A valid DNS name

Related options:

  • vmware_server_username

  • vmware_server_password

vmware_server_username
Type

string

Default

root

This option has a sample default set, which means that its actual default value may vary from the one documented above.

Server username.

This configuration option takes the username for authenticating with the VMware ESX/ESXi or vCenter Server. This option is required when using the VMware storage backend.

Possible Values:

  • Any string that is the username for a user with appropriate privileges

Related options:

  • vmware_server_host

  • vmware_server_password

vmware_server_password
Type

string

Default

vmware

This option has a sample default set, which means that its actual default value may vary from the one documented above.

Server password.

This configuration option takes the password for authenticating with the VMware ESX/ESXi or vCenter Server. This option is required when using the VMware storage backend.

Possible Values:

  • Any string that is a password corresponding to the username specified using the “vmware_server_username” option

Related options:

  • vmware_server_host

  • vmware_server_username

vmware_api_retry_count
Type

integer

Default

10

Minimum Value

1

The number of VMware API retries.

This configuration option specifies the number of times the VMware ESX/VC server API must be retried upon connection related issues or server API call overload. It is not possible to specify ‘retry forever’.

Possible Values:

  • Any positive integer value

Related options:

  • None

vmware_task_poll_interval
Type

integer

Default

5

Minimum Value

1

Interval in seconds used for polling remote tasks invoked on VMware ESX/VC server.

This configuration option takes in the sleep time in seconds for polling an on-going async task as part of the VMWare ESX/VC server API call.

Possible Values:

  • Any positive integer value

Related options:

  • None

vmware_store_image_dir
Type

string

Default

/openstack_glance

The directory where the glance images will be stored in the datastore.

This configuration option specifies the path to the directory where the glance images will be stored in the VMware datastore. If this option is not set, the default directory where the glance images are stored is openstack_glance.

Possible Values:

  • Any string that is a valid path to a directory

Related options:

  • None

vmware_insecure
Type

boolean

Default

False

Set verification of the ESX/vCenter server certificate.

This configuration option takes a boolean value to determine whether or not to verify the ESX/vCenter server certificate. If this option is set to True, the ESX/vCenter server certificate is not verified. If this option is set to False, then the default CA truststore is used for verification.

This option is ignored if the “vmware_ca_file” option is set. In that case, the ESX/vCenter server certificate will then be verified using the file specified using the “vmware_ca_file” option .

Possible Values:

  • True

  • False

Related options:

  • vmware_ca_file

Deprecated Variations

Group

Name

glance_store

vmware_api_insecure
vmware_ca_file
Type

string

Default

/etc/ssl/certs/ca-certificates.crt

This option has a sample default set, which means that its actual default value may vary from the one documented above.

Absolute path to the CA bundle file.

This configuration option enables the operator to use a custom Cerificate Authority File to verify the ESX/vCenter certificate.

If this option is set, the “vmware_insecure” option will be ignored and the CA file specified will be used to authenticate the ESX/vCenter server certificate and establish a secure connection to the server.

Possible Values:

  • Any string that is a valid absolute path to a CA file

Related options:

  • vmware_insecure

vmware_datastores
Type

multi-valued

Default

''

The datastores where the image can be stored.

This configuration option specifies the datastores where the image can be stored in the VMWare store backend. This option may be specified multiple times for specifying multiple datastores. The datastore name should be specified after its datacenter path, separated by “:”. An optional weight may be given after the datastore name, separated again by “:” to specify the priority. Thus, the required format becomes <datacenter_path>:<datastore_name>:<optional_weight>.

When adding an image, the datastore with highest weight will be selected, unless there is not enough free space available in cases where the image size is already known. If no weight is given, it is assumed to be zero and the directory will be considered for selection last. If multiple datastores have the same weight, then the one with the most free space available is selected.

Possible Values:

  • Any string of the format: <datacenter_path>:<datastore_name>:<optional_weight>

Related options:

  • None

oslo_policy

enforce_scope
Type

boolean

Default

False

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.

enforce_new_defaults
Type

boolean

Default

False

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

policy_file
Type

string

Default

policy.yaml

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.

Deprecated Variations

Group

Name

DEFAULT

policy_file
policy_default_rule
Type

string

Default

default

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

Deprecated Variations

Group

Name

DEFAULT

policy_default_rule
policy_dirs
Type

multi-valued

Default

policy.d

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.

Deprecated Variations

Group

Name

DEFAULT

policy_dirs
remote_content_type
Type

string

Default

application/x-www-form-urlencoded

Valid Values

application/x-www-form-urlencoded, application/json

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

remote_ssl_verify_server_crt
Type

boolean

Default

False

server identity verification for REST based policy check

remote_ssl_ca_crt_file
Type

string

Default

<None>

Absolute path to ca cert file for REST based policy check

remote_ssl_client_crt_file
Type

string

Default

<None>

Absolute path to client cert for REST based policy check

remote_ssl_client_key_file
Type

string

Default

<None>

Absolute path client key file REST based policy check