Basic Configuration¶
Glance has a number of options that you can use to configure the Glance API server, the Glance Registry server, and the various storage backends that Glance can use to store images.
Note
The Glance Registry Service and its APIs have been DEPRECATED in the Queens release and are subject to removal at the beginning of the ‘S’ development cycle, following the OpenStack standard deprecation policy.
For more information, see the Glance specification document Actually Deprecate the Glance Registry.
Most configuration is done via configuration files, with the Glance API server and Glance Registry server using separate configuration files.
When starting up a Glance server, you can specify the configuration file to use (see the documentation on controller Glance servers). If you do not specify a configuration file, Glance will look in the following directories for a configuration file, in order:
~/.glance
~/
/etc/glance
/etc
The Glance API server configuration file should be named glance-api.conf
.
Similarly, the Glance Registry server configuration file should be named
glance-registry.conf
. There are many other configuration files also
since Glance maintains a configuration file for each of its services. If you
installed Glance via your operating system’s package management system, it
is likely that you will have sample configuration files installed in
/etc/glance
.
In addition, sample configuration files for each server application with detailed comments are available in the Glance Sample Configuration section.
The PasteDeploy configuration (controlling the deployment of the WSGI
application for each component) may be found by default in
<component>-paste.ini alongside the main configuration file, <component>.conf.
For example, glance-api-paste.ini
corresponds to glance-api.conf
.
This pathname for the paste config is configurable, as follows:
[paste_deploy]
config_file = /path/to/paste/config
Common Configuration Options in Glance¶
Glance has a few command-line options that are common to all Glance programs:
--verbose
Optional. Default:
False
Can be specified on the command line and in configuration files.
Turns on the INFO level in logging and prints more verbose command-line interface printouts.
--debug
Optional. Default:
False
Can be specified on the command line and in configuration files.
Turns on the DEBUG level in logging.
--config-file=PATH
Optional. Default: See below for default search order.
Specified on the command line only.
Takes a path to a configuration file to use when running the program. If this CLI option is not specified, then we check to see if the first argument is a file. If it is, then we try to use that as the configuration file. If there is no file or there were no arguments, we search for a configuration file in the following order:
~/.glance
~/
/etc/glance
/etc
The filename that is searched for depends on the server application name. So, if you are starting up the API server,
glance-api.conf
is searched for, otherwiseglance-registry.conf
.--config-dir=DIR
Optional. Default:
None
Specified on the command line only.
Takes a path to a configuration directory from which all *.conf fragments are loaded. This provides an alternative to multiple
--config-file
options when it is inconvenient to explicitly enumerate all the configuration files, for example when an unknown number of config fragments are being generated by a deployment framework.If
--config-dir
is set, then--config-file
is ignored.An example usage would be:
$ glance-api --config-dir=/etc/glance/glance-api.d $ ls /etc/glance/glance-api.d 00-core.conf 01-swift.conf 02-ssl.conf ... etc.
The numeric prefixes in the example above are only necessary if a specific parse ordering is required (i.e. if an individual config option set in an earlier fragment is overridden in a later fragment).
Note that
glance-manage
currently loads configuration from three files:glance-registry.conf
glance-api.conf
glance-manage.conf
By default
glance-manage.conf
only specifies a custom logging file but other configuration options forglance-manage
should be migrated in there. Warning: Options set inglance-manage.conf
will override options of the same section and name set in the other two. Similarly, options inglance-api.conf
will override options set inglance-registry.conf
. This tool is planning to stop loadingglance-registry.conf
andglance-api.conf
in a future cycle.
Configuring Server Startup Options¶
You can put the following options in the glance-api.conf
and
glance-registry.conf
files, under the [DEFAULT]
section. They enable
startup and binding behaviour for the API and registry servers, respectively.
Note
The Glance Registry Service and its APIs have been DEPRECATED in the Queens release and are subject to removal at the beginning of the ‘S’ development cycle, following the OpenStack standard deprecation policy.
For more information, see the Glance specification document Actually Deprecate the Glance Registry.
bind_host=ADDRESS
The address of the host to bind to.
Optional. Default:
0.0.0.0
bind_port=PORT
The port the server should bind to.
Optional. Default:
9191
for the registry server,9292
for the API serverbacklog=REQUESTS
Number of backlog requests to configure the socket with.
Optional. Default:
4096
tcp_keepidle=SECONDS
Sets the value of TCP_KEEPIDLE in seconds for each server socket. Not supported on OS X.
Optional. Default:
600
client_socket_timeout=SECONDS
Timeout for client connections’ socket operations. If an incoming connection is idle for this period it will be closed. A value of 0 means wait forever.
Optional. Default:
900
workers=PROCESSES
Number of Glance API or Registry worker processes to start. Each worker process will listen on the same port. Increasing this value may increase performance (especially if using SSL with compression enabled). Typically it is recommended to have one worker process per CPU. The value 0 will prevent any new worker processes from being created. When
data_api
is set toglance.db.simple.api
,workers
MUST be set to either0
or1
.Optional. Default: The number of CPUs available will be used by default.
max_request_id_length=LENGTH
Limits the maximum size of the x-openstack-request-id header which is logged. Affects only if context middleware is configured in pipeline.
Optional. Default:
64
(Limited by max_header_line default: 16384)
Configuring SSL Support¶
cert_file=PATH
Path to the certificate file the server should use when binding to an SSL-wrapped socket.
Optional. Default: not enabled.
key_file=PATH
Path to the private key file the server should use when binding to an SSL-wrapped socket.
Optional. Default: not enabled.
ca_file=PATH
Path to the CA certificate file the server should use to validate client certificates provided during an SSL handshake. This is ignored if
cert_file
and ‘’key_file`` are not set.Optional. Default: not enabled.
Configuring Registry Access¶
There are a number of configuration options in Glance that control how the API server accesses the registry server.
Note
The Glance Registry Service and its APIs have been DEPRECATED in the Queens release and are subject to removal at the beginning of the ‘S’ development cycle, following the OpenStack standard deprecation policy.
For more information, see the Glance specification document Actually Deprecate the Glance Registry.
registry_client_protocol=PROTOCOL
If you run a secure Registry server, you need to set this value to
https
and also setregistry_client_key_file
and optionallyregistry_client_cert_file
.Optional. Default: http
registry_client_key_file=PATH
The path to the key file to use in SSL connections to the registry server, if any. Alternately, you may set the
GLANCE_CLIENT_KEY_FILE
environ variable to a filepath of the key fileOptional. Default: Not set.
registry_client_cert_file=PATH
Optional. Default: Not set.
The path to the cert file to use in SSL connections to the registry server, if any. Alternately, you may set the
GLANCE_CLIENT_CERT_FILE
environ variable to a filepath of the cert fileregistry_client_ca_file=PATH
Optional. Default: Not set.
The path to a Certifying Authority’s cert file to use in SSL connections to the registry server, if any. Alternately, you may set the
GLANCE_CLIENT_CA_FILE
environ variable to a filepath of the CA cert fileregistry_client_insecure=False
Optional. Default: False.
When using SSL in connections to the registry server, do not require validation via a certifying authority. This is the registry’s equivalent of specifying –insecure on the command line using glanceclient for the API
registry_client_timeout=SECONDS
Optional. Default:
600
.The period of time, in seconds, that the API server will wait for a registry request to complete. A value of ‘0’ implies no timeout.
Note
use_user_token
, admin_user
, admin_password
,
admin_tenant_name
, auth_url
, auth_strategy
and auth_region
options were considered harmful and have been deprecated in M release.
They will be removed in O release. For more information read
OSSN-0060.
Related functionality with uploading big images has been implemented with
Keystone trusts support.
use_user_token=True
Optional. Default: True
DEPRECATED. This option will be removed in O release.
Pass the user token through for API requests to the registry.
If ‘use_user_token’ is not in effect then admin credentials can be specified (see below). If admin credentials are specified then they are used to generate a token; this token rather than the original user’s token is used for requests to the registry.
admin_user=USER
DEPRECATED. This option will be removed in O release.
If ‘use_user_token’ is not in effect then admin credentials can be specified. Use this parameter to specify the username.
Optional. Default: None
admin_password=PASSWORD
DEPRECATED. This option will be removed in O release.
If ‘use_user_token’ is not in effect then admin credentials can be specified. Use this parameter to specify the password.
Optional. Default: None
admin_tenant_name=TENANTNAME
DEPRECATED. This option will be removed in O release.
If ‘use_user_token’ is not in effect then admin credentials can be specified. Use this parameter to specify the tenant name.
Optional. Default: None
auth_url=URL
DEPRECATED. This option will be removed in O release.
If ‘use_user_token’ is not in effect then admin credentials can be specified. Use this parameter to specify the Keystone endpoint.
Optional. Default: None
auth_strategy=STRATEGY
DEPRECATED. This option will be removed in O release.
If ‘use_user_token’ is not in effect then admin credentials can be specified. Use this parameter to specify the auth strategy.
Optional. Default: noauth
auth_region=REGION
DEPRECATED. This option will be removed in O release.
If ‘use_user_token’ is not in effect then admin credentials can be specified. Use this parameter to specify the region.
Optional. Default: None
Configuring Logging in Glance¶
There are a number of configuration options in Glance that control how Glance servers log messages.
--log-config=PATH
Optional. Default:
None
Specified on the command line only.
Takes a path to a configuration file to use for configuring logging.
Logging Options Available Only in Configuration Files¶
You will want to place the different logging options in the [DEFAULT]
section in your application configuration file. As an example, you might
do the following for the API server, in a configuration file called
etc/glance-api.conf
:
[DEFAULT]
log_file = /var/log/glance/api.log
log_file
The filepath of the file to use for logging messages from Glance’s servers. If missing, the default is to output messages to
stdout
, so if you are running Glance servers in a daemon mode (usingglance-control
) you should make sure that thelog_file
option is set appropriately.log_dir
The filepath of the directory to use for log files. If not specified (the default) the
log_file
is used as an absolute filepath.log_date_format
The format string for timestamps in the log output.
Defaults to
%Y-%m-%d %H:%M:%S
. See the logging module documentation for more information on setting this format string.log_use_syslog
Use syslog logging functionality.
Defaults to False.
Configuring Glance Storage Backends¶
There are a number of configuration options in Glance that control how Glance
stores disk images. These configuration options are specified in the
glance-api.conf
configuration file in the section [glance_store]
.
default_store=STORE
Optional. Default:
file
Can only be specified in configuration files.
Sets the storage backend to use by default when storing images in Glance. Available options for this option are (
file
,swift
,rbd
,sheepdog
,cinder
orvsphere
). In order to select a default store it must also be listed in thestores
list described below.stores=STORES
Optional. Default:
file, http
A comma separated list of enabled glance stores. Some available options for this option are (
filesystem
,http
,rbd
,swift
,sheepdog
,cinder
,vmware
)
Configuring the Filesystem Storage Backend¶
filesystem_store_datadir=PATH
Optional. Default:
/var/lib/glance/images/
Can only be specified in configuration files.
This option is specific to the filesystem storage backend.
Sets the path where the filesystem storage backend write disk images. Note that the filesystem storage backend will attempt to create this directory if it does not exist. Ensure that the user that
glance-api
runs under has write permissions to this directory.filesystem_store_file_perm=PERM_MODE
Optional. Default:
0
Can only be specified in configuration files.
This option is specific to the filesystem storage backend.
The required permission value, in octal representation, for the created image file. You can use this value to specify the user of the consuming service (such as Nova) as the only member of the group that owns the created files. To keep the default value, assign a permission value that is less than or equal to 0. Note that the file owner must maintain read permission; if this value removes that permission an error message will be logged and the BadStoreConfiguration exception will be raised. If the Glance service has insufficient privileges to change file access permissions, a file will still be saved, but a warning message will appear in the Glance log.
filesystem_store_chunk_size=SIZE_IN_BYTES
Optional. Default:
65536
Can only be specified in configuration files.
This option is specific to the filesystem storage backend.
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.
Configuring the Filesystem Storage Backend with multiple stores¶
filesystem_store_datadirs=PATH:PRIORITY
Optional. Default:
/var/lib/glance/images/:1
Example:
filesystem_store_datadirs = /var/glance/store filesystem_store_datadirs = /var/glance/store1:100 filesystem_store_datadirs = /var/glance/store2:200
This option can only be specified in configuration file and is specific to the filesystem storage backend only.
filesystem_store_datadirs option allows administrators to configure multiple store directories to save glance image in filesystem storage backend. Each directory can be coupled with its priority.
NOTE:
This option can be specified multiple times to specify multiple stores.
Either filesystem_store_datadir or filesystem_store_datadirs option must be specified in glance-api.conf
Store with priority 200 has precedence over store with priority 100.
If no priority is specified, default priority ‘0’ is associated with it.
If two filesystem stores have same priority store with maximum free space will be chosen to store the image.
If same store is specified multiple times then BadStoreConfiguration exception will be raised.
Configuring the Swift Storage Backend¶
swift_store_auth_address=URL
Required when using the Swift storage backend.
Can only be specified in configuration files.
Deprecated. Use
auth_address
in the Swift back-end configuration file instead.This option is specific to the Swift storage backend.
Sets the authentication URL supplied to Swift when making calls to its storage system. For more information about the Swift authentication system, please see the Swift auth documentation.
IMPORTANT NOTE: Swift authentication addresses use HTTPS by default. This means that if you are running Swift with authentication over HTTP, you need to set your
swift_store_auth_address
to the full URL, including thehttp://
.swift_store_user=USER
Required when using the Swift storage backend.
Can only be specified in configuration files.
Deprecated. Use
user
in the Swift back-end configuration file instead.This option is specific to the Swift storage backend.
Sets the user to authenticate against the
swift_store_auth_address
with.swift_store_key=KEY
Required when using the Swift storage backend.
Can only be specified in configuration files.
Deprecated. Use
key
in the Swift back-end configuration file instead.This option is specific to the Swift storage backend.
Sets the authentication key to authenticate against the
swift_store_auth_address
with for the userswift_store_user
.swift_store_container=CONTAINER
Optional. Default:
glance
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
Sets the name of the container to use for Glance images in Swift.
swift_store_create_container_on_put
Optional. Default:
False
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
If true, Glance will attempt to create the container
swift_store_container
if it does not exist.swift_store_large_object_size=SIZE_IN_MB
Optional. Default:
5120
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
What size, in MB, should Glance start chunking image files and do a large object manifest in Swift? By default, this is the maximum object size in Swift, which is 5GB
swift_store_large_object_chunk_size=SIZE_IN_MB
Optional. Default:
200
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
When doing a large object manifest, what size, in MB, should Glance write chunks to Swift? The default is 200MB.
swift_store_multi_tenant=False
Optional. Default:
False
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
If set to True enables multi-tenant storage mode which causes Glance images to be stored in tenant specific Swift accounts. When set to False Glance stores all images in a single Swift account.
swift_store_multiple_containers_seed
Optional. Default:
0
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
When set to 0, a single-tenant store will only use one container to store all images. When set to an integer value between 1 and 32, a single-tenant store will use multiple containers to store images, and this value will determine how many characters from an image UUID are checked when determining what container to place the image in. The maximum number of containers that will be created is approximately equal to 16^N. This setting is used only when swift_store_multi_tenant is disabled.
Example: if this config option 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 in this example with N=10 the container name would be ‘glance_fdae39a1-ba’.
When choosing the value for swift_store_multiple_containers_seed, deployers should discuss a suitable value with their swift operations team. The authors of this option recommend that large scale deployments use a value of ‘2’, which will create a maximum of ~256 containers. Choosing a higher number than this, even in extremely large scale deployments, may not have any positive impact on performance and could lead to a large number of empty, unused containers. The largest of deployments could notice an increase in performance if swift rate limits are throttling on single container. Note: If dynamic container creation is turned off, any value for this configuration option higher than ‘1’ may be unreasonable as the deployer would have to manually create each container.
swift_store_admin_tenants
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
Optional. Default: Not set.
A list of swift ACL strings that will be applied as both read and write ACLs to the containers created by Glance in multi-tenant mode. This grants the specified tenants/users read and write access to all newly created image objects. The standard swift ACL string formats are allowed, including:
<tenant_id>:<username> <tenant_name>:<username> *:<username>
Multiple ACLs can be combined using a comma separated list, for example: swift_store_admin_tenants = service:glance,*:admin
swift_store_auth_version
Can only be specified in configuration files.
Deprecated. Use
auth_version
in the Swift back-end configuration file instead.This option is specific to the Swift storage backend.
Optional. Default:
2
A string indicating which version of Swift OpenStack authentication to use. See the project python-swiftclient for more details.
swift_store_service_type
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
Optional. Default:
object-store
A string giving the service type of the swift service to use. This setting is only used if swift_store_auth_version is
2
.swift_store_region
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
Optional. Default: Not set.
A string giving the region of the swift service endpoint to use. This setting is only used if swift_store_auth_version is
2
. This setting is especially useful for disambiguation if multiple swift services might appear in a service catalog during authentication.swift_store_endpoint_type
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
Optional. Default:
publicURL
A string giving the endpoint type of the swift service endpoint to use. This setting is only used if swift_store_auth_version is
2
.swift_store_ssl_compression
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
Optional. Default: True.
If set to False, disables SSL layer compression of https swift requests. Setting to ‘False’ may improve performance for images which are already in a compressed format, e.g. qcow2. If set to True then compression will be enabled (provided it is supported by the swift proxy).
swift_store_cacert
Can only be specified in configuration files.
Optional. Default:
None
A string giving the path to a CA certificate bundle that will allow Glance’s services to perform SSL verification when communicating with Swift.
swift_store_retry_get_count
The number of times a Swift download will be retried before the request fails. Optional. Default:
0
Configuring Multiple Swift Accounts/Stores¶
In order to not store Swift account credentials in the database, and to have support for multiple accounts (or multiple Swift backing stores), a reference is stored in the database and the corresponding configuration (credentials/ parameters) details are stored in the configuration file. Optional. Default: not enabled.
The location for this file is specified using the swift_store_config_file
configuration file in the section [DEFAULT]
. If an incorrect value is
specified, Glance API Swift store service will not be configured.
swift_store_config_file=PATH
This option is specific to the Swift storage backend.
default_swift_reference=DEFAULT_REFERENCE
Required when multiple Swift accounts/backing stores are configured.
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
It is the default swift reference that is used to add any new images.
swift_store_auth_insecure
If True, bypass SSL certificate verification for Swift.
Can only be specified in configuration files.
This option is specific to the Swift storage backend.
Optional. Default:
False
Configuring Swift configuration file¶
If swift_store_config_file
is set, Glance will use information
from the file specified under this parameter.
Note
The swift_store_config_file
is currently used only for single-tenant
Swift store configurations. If you configure a multi-tenant Swift store
back end (swift_store_multi_tenant=True
), ensure that both
swift_store_config_file
and default_swift_reference
are not set.
The file contains a set of references like:
[ref1]
user = tenant:user1
key = key1
auth_version = 2
auth_address = http://localhost:5000/v2.0
[ref2]
user = project_name:user_name2
key = key2
user_domain_id = default
project_domain_id = default
auth_version = 3
auth_address = http://localhost:5000/v3
A default reference must be configured. Its parameters will be used when
creating new images. For example, to specify ref2
as the default
reference, add the following value to the [glance_store] section of
glance-api.conf
file:
default_swift_reference = ref2
In the reference, a user can specify the following parameters:
user
A project_name user_name pair in the
project_name:user_name
format to authenticate against the Swift authentication service.key
An authentication key for a user authenticating against the Swift authentication service.
auth_address
An address where the Swift authentication service is located.
auth_version
A version of the authentication service to use. Valid versions are
2
and3
for Keystone and1
(deprecated) for Swauth and Rackspace.Optional. Default:
2
project_domain_id
A domain ID of the project which is the requested project-level authorization scope.
Optional. Default:
None
This option can be specified if ``auth_version` is
3
.`project_domain_name
A domain name of the project which is the requested project-level authorization scope.
Optional. Default:
None
This option can be specified if ``auth_version` is
3
.`user_domain_id
A domain ID of the user which is the requested domain-level authorization scope.
Optional. Default:
None
This option can be specified if ``auth_version` is
3
.`user_domain_name
A domain name of the user which is the requested domain-level authorization scope.
Optional. Default:
None
This option can be specified if ``auth_version` is
3
. `
Configuring the RBD Storage Backend¶
Note: the RBD storage backend requires the python bindings for librados and librbd. These are in the python-ceph package on Debian-based distributions.
rbd_store_pool=POOL
Optional. Default:
rbd
Can only be specified in configuration files.
This option is specific to the RBD storage backend.
Sets the RADOS pool in which images are stored.
rbd_store_chunk_size=CHUNK_SIZE_MB
Optional. Default:
4
Can only be specified in configuration files.
This option is specific to the RBD storage backend.
Images will be chunked into objects of this size (in megabytes). For best performance, this should be a power of two.
rados_connect_timeout
Optional. Default:
0
Can only be specified in configuration files.
This option is specific to the RBD storage backend.
Prevents glance-api hangups during the connection to RBD. Sets the time to wait (in seconds) for glance-api before closing the connection. Setting
rados_connect_timeout<=0
means no timeout.rbd_store_ceph_conf=PATH
Optional. Default:
/etc/ceph/ceph.conf
,~/.ceph/config
, and./ceph.conf
Can only be specified in configuration files.
This option is specific to the RBD storage backend.
Sets the Ceph configuration file to use.
rbd_store_user=NAME
Optional. Default:
admin
Can only be specified in configuration files.
This option is specific to the RBD storage backend.
Sets the RADOS user to authenticate as. This is only needed when RADOS authentication is enabled.
A keyring must be set for this user in the Ceph
configuration file, e.g. with a user glance
:
[client.glance]
keyring=/etc/glance/rbd.keyring
To set up a user named glance
with minimal permissions,
using a pool called images
, run:
rados mkpool images
ceph-authtool --create-keyring /etc/glance/rbd.keyring
ceph-authtool --gen-key --name client.glance --cap mon 'allow r' --cap osd 'allow rwx pool=images' /etc/glance/rbd.keyring
ceph auth add client.glance -i /etc/glance/rbd.keyring
Configuring the Sheepdog Storage Backend¶
sheepdog_store_address=ADDR
Optional. Default:
localhost
Can only be specified in configuration files.
This option is specific to the Sheepdog storage backend.
Sets the IP address of the sheep daemon
sheepdog_store_port=PORT
Optional. Default:
7000
Can only be specified in configuration files.
This option is specific to the Sheepdog storage backend.
Sets the IP port of the sheep daemon
sheepdog_store_chunk_size=SIZE_IN_MB
Optional. Default:
64
Can only be specified in configuration files.
This option is specific to the Sheepdog storage backend.
Images will be chunked into objects of this size (in megabytes). For best performance, this should be a power of two.
Configuring the Cinder Storage Backend¶
Note: Currently Cinder store is experimental. Current deployers should be aware that the use of it in production right now may be risky. It is expected to work well with most iSCSI Cinder backends such as LVM iSCSI, but will not work with some backends especially if they don’t support host-attach.
Note: To create a Cinder volume from an image in this store quickly, additional settings are required. Please see the Volume-backed image documentation for more information.
cinder_catalog_info=<service_type>:<service_name>:<endpoint_type>
Optional. Default:
volumev2::publicURL
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
Sets the info to match when looking for cinder in the service catalog. Format is : separated values of the form: <service_type>:<service_name>:<endpoint_type>
cinder_endpoint_template=http://ADDR:PORT/VERSION/%(tenant)s
Optional. Default:
None
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
Override service catalog lookup with template for cinder endpoint.
%(...)s
parts are replaced by the value in the request context. e.g. http://localhost:8776/v2/%(tenant)sos_region_name=REGION_NAME
Optional. Default:
None
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
Region name of this node.
Deprecated. Use
cinder_os_region_name
instead.cinder_os_region_name=REGION_NAME
Optional. Default:
None
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
Region name of this node. If specified, it is used to locate cinder from the service catalog.
cinder_ca_certificates_file=CA_FILE_PATH
Optional. Default:
None
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
Location of ca certificates file to use for cinder client requests.
cinder_http_retries=TIMES
Optional. Default:
3
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
Number of cinderclient retries on failed http calls.
cinder_state_transition_timeout
Optional. Default:
300
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
Time period, in seconds, to wait for a cinder volume transition to complete.
cinder_api_insecure=ON_OFF
Optional. Default:
False
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
Allow to perform insecure SSL requests to cinder.
cinder_store_user_name=NAME
Optional. Default:
None
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
User name to authenticate against Cinder. If <None>, the user of current context is used.
NOTE: This option is applied only if all of
cinder_store_user_name
,cinder_store_password
,cinder_store_project_name
andcinder_store_auth_address
are set. These options are useful to put image volumes into the internal service project in order to hide the volume from users, and to make the image sharable among projects.cinder_store_password=PASSWORD
Optional. Default:
None
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
Password for the user authenticating against Cinder. If <None>, the current context auth token is used.
cinder_store_project_name=NAME
Optional. Default:
None
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
Project name where the image is stored in Cinder. If <None>, the project in current context is used.
cinder_store_auth_address=URL
Optional. Default:
None
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
The address where the Cinder authentication service is listening. If <None>, the cinder endpoint in the service catalog is used.
rootwrap_config=NAME
Optional. Default:
/etc/glance/rootwrap.conf
Can only be specified in configuration files.
This option is specific to the Cinder storage backend.
Path to the rootwrap configuration file to use for running commands as root.
Configuring the VMware Storage Backend¶
vmware_server_host=ADDRESS
Required when using the VMware storage backend.
Can only be specified in configuration files.
Sets the address of the ESX/ESXi or vCenter Server target system. The address can contain an IP (
127.0.0.1
), an IP and port (127.0.0.1:443
), a DNS name (www.my-domain.com
) or DNS and port.This option is specific to the VMware storage backend.
vmware_server_username=USERNAME
Required when using the VMware storage backend.
Can only be specified in configuration files.
Username for authenticating with VMware ESX/ESXi or vCenter Server.
vmware_server_password=PASSWORD
Required when using the VMware storage backend.
Can only be specified in configuration files.
Password for authenticating with VMware ESX/ESXi or vCenter Server.
vmware_datastores
Required when using the VMware storage backend.
This option can only be specified in configuration file and is specific to the VMware storage backend.
vmware_datastores allows administrators to configure multiple datastores to save glance image in the VMware store backend. The required format for the option is: <datacenter_path>:<datastore_name>:<optional_weight>.
where datacenter_path is the inventory path to the datacenter where the datastore is located. An optional weight can be given to specify the priority.
Example:
vmware_datastores = datacenter1:datastore1 vmware_datastores = dc_folder/datacenter2:datastore2:100 vmware_datastores = datacenter1:datastore3:200
NOTE:
This option can be specified multiple times to specify multiple datastores.
Either vmware_datastore_name or vmware_datastores option must be specified in glance-api.conf
Datastore with weight 200 has precedence over datastore with weight 100.
If no weight is specified, default weight ‘0’ is associated with it.
If two datastores have same weight, the datastore with maximum free space will be chosen to store the image.
If the datacenter path or datastore name contains a colon (:) symbol, it must be escaped with a backslash.
vmware_api_retry_count=TIMES
Optional. Default:
10
Can only be specified in configuration files.
The number of times VMware ESX/VC server API must be retried upon connection related issues.
vmware_task_poll_interval=SECONDS
Optional. Default:
5
Can only be specified in configuration files.
The interval used for polling remote tasks invoked on VMware ESX/VC server.
vmware_store_image_dir
Optional. Default:
/openstack_glance
Can only be specified in configuration files.
The path to access the folder where the images will be stored in the datastore.
vmware_api_insecure=ON_OFF
Optional. Default:
False
Can only be specified in configuration files.
Allow to perform insecure SSL requests to ESX/VC server.
Configuring the Storage Endpoint¶
swift_store_endpoint=URL
Optional. Default:
None
Can only be specified in configuration files.
Overrides the storage URL returned by auth. The URL should include the path up to and excluding the container. The location of an object is obtained by appending the container and object to the configured URL. e.g.
https://www.my-domain.com/v1/path_up_to_container
Configuring Glance Image Size Limit¶
The following configuration option is specified in the
glance-api.conf
configuration file in the section [DEFAULT]
.
image_size_cap=SIZE
Optional. Default:
1099511627776
(1 TB)Maximum image size, in bytes, which can be uploaded through the Glance API server.
IMPORTANT NOTE: this value should only be increased after careful consideration and must be set to a value under 8 EB (9223372036854775808).
Configuring Glance User Storage Quota¶
The following configuration option is specified in the
glance-api.conf
configuration file in the section [DEFAULT]
.
user_storage_quota
Optional. Default: 0 (Unlimited).
This value specifies the maximum amount of storage that each user can use across all storage systems. Optionally unit can be specified for the value. Values are accepted in B, KB, MB, GB or TB which are for Bytes, KiloBytes, MegaBytes, GigaBytes and TeraBytes respectively. Default unit is Bytes.
- Example values would be,
user_storage_quota=20GB
Configuring the Image Cache¶
Glance API servers can be configured to have a local image cache. Caching of image files is transparent and happens using a piece of middleware that can optionally be placed in the server application pipeline.
This pipeline is configured in the PasteDeploy configuration file, <component>-paste.ini. You should not generally have to edit this file directly, as it ships with ready-made pipelines for all common deployment flavors.
Enabling the Image Cache Middleware¶
To enable the image cache middleware, the cache middleware must occur in the application pipeline after the appropriate context middleware.
The cache middleware should be in your glance-api-paste.ini
in a section
titled [filter:cache]
. It should look like this:
[filter:cache]
paste.filter_factory = glance.api.middleware.cache:CacheFilter.factory
A ready-made application pipeline including this filter is defined in
the glance-api-paste.ini
file, looking like so:
[pipeline:glance-api-caching]
pipeline = versionnegotiation context cache apiv1app
To enable the above application pipeline, in your main glance-api.conf
configuration file, select the appropriate deployment flavor like so:
[paste_deploy]
flavor = caching
Enabling the Image Cache Management Middleware¶
There is an optional cachemanage
middleware that allows you to
directly interact with cache images. Use this flavor in place of the
cache
flavor in your API configuration file. There are three types you
can chose: cachemanagement
, keystone+cachemanagement
and
trusted-auth+cachemanagement
.:
[paste_deploy]
flavor = keystone+cachemanagement
Configuration Options Affecting the Image Cache¶
Note
These configuration options must be set in both the glance-cache and glance-api configuration files.
One main configuration file option affects the image cache.
image_cache_dir=PATH
Required when image cache middleware is enabled.
Default:
/var/lib/glance/image-cache
This is the base directory the image cache can write files to. Make sure the directory is writable by the user running the
glance-api
serverimage_cache_driver=DRIVER
Optional. Choice of
sqlite
orxattr
Default:
sqlite
The default
sqlite
cache driver has no special dependencies, other than thepython-sqlite3
library, which is installed on virtually all operating systems with modern versions of Python. It stores information about the cached files in a SQLite database.The
xattr
cache driver required thepython-xattr>=0.6.0
library and requires that the filesystem containingimage_cache_dir
have access times tracked for all files (in other words, the noatime option CANNOT be set for that filesystem). In addition,user_xattr
must be set on the filesystem’s description line in fstab. Because of these requirements, thexattr
cache driver is not available on Windows.image_cache_sqlite_db=DB_FILE
Optional.
Default:
cache.db
When using the
sqlite
cache driver, you can set the name of the database that will be used to store the cached images information. The database is always contained in theimage_cache_dir
.image_cache_max_size=SIZE
Optional.
Default:
10737418240
(10 GB)Size, in bytes, that the image cache should be constrained to. Images files are cached automatically in the local image cache, even if the writing of that image file would put the total cache size over this size. The
glance-cache-pruner
executable is what prunes the image cache to be equal to or less than this value. Theglance-cache-pruner
executable is designed to be run via cron on a regular basis. See more about this executable in Controlling the Growth of the Image Cache
Configuring the Glance Registry¶
There are a number of configuration options in Glance that control how
this registry server operates. These configuration options are specified in the
glance-registry.conf
configuration file in the section [DEFAULT]
.
IMPORTANT NOTE: The glance-registry service is only used in conjunction with the glance-api service when clients are using the v1 REST API. See Configuring Glance APIs for more info.
sql_connection=CONNECTION_STRING
(--sql-connection
when specified
on command line)
Optional. Default:
None
Can be specified in configuration files. Can also be specified on the command-line for the
glance-manage
program.Sets the SQLAlchemy connection string to use when connecting to the registry database. Please see the documentation for SQLAlchemy connection strings online. You must urlencode any special characters in CONNECTION_STRING.
sql_timeout=SECONDS
Optional. Default:
3600
Can only be specified in configuration files.
Sets the number of seconds after which SQLAlchemy should reconnect to the datastore if no activity has been made on the connection.
enable_v1_registry=<True|False>
Optional and DEPRECATED. Default:
True
enable_v2_registry=<True|False>
Optional and DEPRECATED. Default:
True
Note
The Glance Registry Service and its APIs have been DEPRECATED in the Queens release and are subject to removal at the beginning of the ‘S’ development cycle, following the OpenStack standard deprecation policy.
For more information, see the Glance specification document Actually Deprecate the Glance Registry.
Defines which version(s) of the Registry API will be enabled. If the Glance API server parameter
enable_v1_api
has been set toTrue
theenable_v1_registry
has to beTrue
as well. If the Glance API server parameterenable_v2_api
has been set toTrue
and the parameterdata_api
has been set toglance.db.registry.api
theenable_v2_registry
has to be set toTrue
Configuring Notifications¶
Glance can optionally generate notifications to be logged or sent to a message
queue. The configuration options are specified in the glance-api.conf
configuration file.
[oslo_messaging_notifications]/driver
Optional. Default:
noop
Sets the notification driver used by oslo.messaging. Options include
messaging
,messagingv2
,log
androuting
.NOTE In M release, the``[DEFAULT]/notification_driver`` option has been deprecated in favor of
[oslo_messaging_notifications]/driver
.For more information see Glance notifications and oslo.messaging.
[DEFAULT]/disabled_notifications
Optional. Default:
[]
List of disabled notifications. A notification can be given either as a notification type to disable a single event, or as a notification group prefix to disable all events within a group.
Example: if this config option is set to [“image.create”, “metadef_namespace”], then “image.create” notification will not be sent after image is created and none of the notifications for metadefinition namespaces will be sent.
Configuring Glance Property Protections¶
Access to image meta properties may be configured using a
Property Protections Configuration file. The
location for this file can be specified in the glance-api.conf
configuration file in the section [DEFAULT]
. If an incorrect value is
specified, glance API service will not start.
property_protection_file=PATH
Optional. Default: not enabled.
If property_protection_file is set, the file may use either roles or policies to specify property protections.
property_protection_rule_format=<roles|policies>
Optional. Default:
roles
.
Configuring Glance APIs¶
The glance-api service implements versions 1 and 2 of the OpenStack Images API. Disable any version of the Images API using the following options:
enable_v1_api=<True|False>
Optional. Default:
True
enable_v2_api=<True|False>
Optional. Default:
True
IMPORTANT NOTE: To use v2 registry in v2 API, you must set
data_api
to glance.db.registry.api in glance-api.conf.
Configuring Glance Tasks¶
Glance Tasks are implemented only for version 2 of the OpenStack Images API.
The config value task_time_to_live
is used to determine how long a task
would be visible to the user after transitioning to either the success
or
the failure
state.
task_time_to_live=<Time_in_hours>
Optional. Default:
48
The config value
task_executor
is used to determine which executor should be used by the Glance service to process the task. The currently available implementation is:taskflow
.task_executor=<executor_type>
Optional. Default:
taskflow
The
taskflow
engine has its own set of configuration options, under thetaskflow_executor
section, that can be tuned to improve the task execution process. Among the available options, you may findengine_mode
andmax_workers
. The former allows for selecting an execution model and the available options areserial
,parallel
andworker-based
. Themax_workers
option, instead, allows for controlling the number of workers that will be instantiated per executor instance.The default value for the
engine_mode
isparallel
, whereas the default number ofmax_workers
is10
.
Configuring Glance performance profiling¶
Glance supports using osprofiler to trace the performance of each key internal handling, including RESTful API calling, DB operation and etc.
Please be aware that Glance performance profiling is currently a work in
progress feature.
Although, some trace points is available, e.g. API
execution profiling at wsgi main entry and SQL execution profiling at DB
module, the more fine-grained trace point is being worked on.
The config value enabled
is used to determine whether fully enable
profiling feature for glance-api and glance-registry service.
enabled=<True|False>
Optional. Default:
False
There is one more configuration option that needs to be defined to enable Glance services profiling. The config value
hmac_keys
is used for encrypting context data for performance profiling.hmac_keys=<secret_key_string>
Optional. Default:
SECRET_KEY
IMPORTANT NOTE: in order to make profiling work as designed operator needs to make those values of HMAC key be consistent for all services in their deployment. Without HMAC key the profiling will not be triggered even profiling feature is enabled.
IMPORTANT NOTE: previously HMAC keys (as well as enabled parameter) were placed at /etc/glance/api-paste.ini and /etc/glance/registry-paste.ini files for Glance API and Glance Registry services respectively. Starting with osprofiler 0.3.1 release there is no need to set these arguments in the *-paste.ini files. This functionality is still supported, although the config values are having larger priority.
The config value
trace_sqlalchemy
is used to determine whether fully enable sqlalchemy engine based SQL execution profiling feature for glance-api and glance-registry services.trace_sqlalchemy=<True|False>
Optional. Default:
False
Configuring Glance public endpoint¶
This setting allows an operator to configure the endpoint URL that will
appear in the Glance “versions” response (that is, the response to
GET /
). This can be necessary when the Glance API service is run
behind a proxy because the default endpoint displayed in the versions
response is that of the host actually running the API service. If
Glance is being run behind a load balancer, for example, direct access
to individual hosts running the Glance API may not be allowed, hence the
load balancer URL would be used for this value.
public_endpoint=<None|URL>
Optional. Default:
None
Configuring Glance digest algorithm¶
Digest algorithm that will be used for digital signature. The default is sha256. Use the command:
openssl list-message-digest-algorithms
to get the available algorithms supported by the version of OpenSSL on the platform. Examples are “sha1”, “sha256”, “sha512”, etc. If an invalid digest algorithm is configured, all digital signature operations will fail and return a ValueError exception with “No such digest method” error.
digest_algorithm=<algorithm>
Optional. Default:
sha256
Configuring http_keepalive option¶
http_keepalive=<True|False>
If False, server will return the header “Connection: close”, If True, server will return “Connection: Keep-Alive” in its responses. In order to close the client socket connection explicitly after the response is sent and read successfully by the client, you simply have to set this option to False when you create a wsgi server.
Configuring the Health Check¶
This setting allows an operator to configure the endpoint URL that will provide information to load balancer if given API endpoint at the node should be available or not. Both Glance API and Glance Registry servers can be configured to expose a health check URL.
To enable the health check middleware, it must occur in the beginning of the application pipeline.
The health check middleware should be placed in your
glance-api-paste.ini
/ glance-registry-paste.ini
in a section
titled [filter:healthcheck]
. It should look like this:
[filter:healthcheck]
paste.filter_factory = oslo_middleware:Healthcheck.factory
backends = disable_by_file
disable_by_file_path = /etc/glance/healthcheck_disable
A ready-made application pipeline including this filter is defined e.g. in
the glance-api-paste.ini
file, looking like so:
[pipeline:glance-api]
pipeline = healthcheck versionnegotiation osprofiler unauthenticated-context rootapp
For more information see oslo.middleware.
Configuring supported disk formats¶
Each image in Glance has an associated disk format property.
When creating an image the user specifies a disk format. They must
select a format from the set that the Glance service supports. This
supported set can be seen by querying the /v2/schemas/images
resource.
An operator can add or remove disk formats to the supported set. This is
done by setting the disk_formats
parameter which is found in the
[image_formats]
section of glance-api.conf
.
disk_formats=<Comma separated list of disk formats>
Optional. Default:
ami,ari,aki,vhd,vhdx,vmdk,raw,qcow2,vdi,iso,ploop