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The Image service supports several back ends for storing virtual machine images:
OpenStack Block Storage (cinder)
A directory on a local file system
GridFS
Ceph RBD
Amazon S3
Sheepdog
OpenStack Object Storage (swift)
VMware ESX
The following tables detail the options available for each.
| Configuration option = Default value | Description |
|---|---|
| [glance_store] | |
cinder_api_insecure = False |
(BoolOpt) Allow to perform insecure SSL requests to cinder |
cinder_ca_certificates_file = None |
(StrOpt) Location of ca certicates file to use for cinder client requests. |
cinder_catalog_info = volume:cinder:publicURL |
(StrOpt) 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 = None |
(StrOpt) Override service catalog lookup with template for cinder endpoint e.g. http://localhost:8776/v1/%(project_id)s |
cinder_http_retries = 3 |
(IntOpt) Number of cinderclient retries on failed http calls |
| Configuration option = Default value | Description |
|---|---|
| [glance_store] | |
filesystem_store_datadir = None |
(StrOpt) Directory to which the Filesystem backend store writes images. |
filesystem_store_datadirs = None |
(MultiStrOpt) List of directories and its priorities to which the Filesystem backend store writes images. |
filesystem_store_file_perm = 0 |
(IntOpt) The required permission for created image file. In this way the user other service used, e.g. Nova, who consumes the image could be the exclusive member of the group that owns the files created. Assigning it less then or equal to zero means don't change the default permission of the file. This value will be decoded as an octal digit. |
filesystem_store_metadata_file = None |
(StrOpt) The path to a file which contains the metadata to be returned with any location associated with this store. The file must contain a valid JSON object. The object should contain the keys 'id' and 'mountpoint'. The value for both keys should be 'string'. |
| Configuration option = Default value | Description |
|---|---|
| [glance_store] | |
mongodb_store_db = None |
(StrOpt) Database to use |
mongodb_store_uri = None |
(StrOpt) Hostname or IP address of the instance to connect to, or a mongodb URI, or a list of hostnames / mongodb URIs. If host is an IPv6 literal it must be enclosed in '[' and ']' characters following the RFC2732 URL syntax (e.g. '[::1]' for localhost) |
| Configuration option = Default value | Description |
|---|---|
| [glance_store] | |
rbd_store_ceph_conf = /etc/ceph/ceph.conf |
(StrOpt) Ceph configuration file path. If <None>, librados will locate the default config. If using cephx authentication, this file should include a reference to the right keyring in a client.<USER> section |
rbd_store_chunk_size = 8 |
(IntOpt) RADOS images will be chunked into objects of this size (in megabytes). For best performance, this should be a power of two. |
rbd_store_pool = localhost |
(StrOpt) RADOS pool in which images are stored. |
rbd_store_user = None |
(StrOpt) RADOS user to authenticate as (only applicable if using Cephx. If <None>, a default will be chosen based on the client. section in rbd_store_ceph_conf) |
| Configuration option = Default value | Description |
|---|---|
| [glance_store] | |
s3_store_access_key = None |
(StrOpt) The S3 query token access key. |
s3_store_bucket = None |
(StrOpt) The S3 bucket to be used to store the Glance data. |
s3_store_bucket_url_format = subdomain |
(StrOpt) The S3 calling format used to determine the bucket. Either subdomain or path can be used. |
s3_store_create_bucket_on_put = False |
(BoolOpt) A boolean to determine if the S3 bucket should be created on upload if it does not exist or if an error should be returned to the user. |
s3_store_host = None |
(StrOpt) The host where the S3 server is listening. |
s3_store_large_object_chunk_size = 10 |
(IntOpt) What multipart upload part size, in MB, should S3 use when uploading parts. The size must be greater than or equal to 5M. |
s3_store_large_object_size = 100 |
(IntOpt) What size, in MB, should S3 start chunking image files and do a multipart upload in S3. |
s3_store_object_buffer_dir = None |
(StrOpt) The local directory where uploads will be staged before they are transferred into S3. |
s3_store_secret_key = None |
(StrOpt) The S3 query token secret key. |
s3_store_thread_pools = 10 |
(IntOpt) The number of thread pools to perform a multipart upload in S3. |
| Configuration option = Default value | Description |
|---|---|
| [glance_store] | |
sheepdog_store_address = localhost |
(StrOpt) IP address of sheep daemon. |
sheepdog_store_chunk_size = 64 |
(IntOpt) Images will be chunked into objects of this size (in megabytes). For best performance, this should be a power of two. |
sheepdog_store_port = 7000 |
(IntOpt) Port of sheep daemon. |
| Configuration option = Default value | Description |
|---|---|
| [DEFAULT] | |
default_swift_reference = ref1 |
(StrOpt) The reference to the default swift account/backing store parameters to use for adding new images. |
swift_store_auth_address = None |
(StrOpt) The address where the Swift authentication service is listening.(deprecated) |
swift_store_config_file = None |
(StrOpt) The config file that has the swift account(s)configs. |
swift_store_key = None |
(StrOpt) Auth key for the user authenticating against the Swift authentication service. (deprecated) |
swift_store_user = None |
(StrOpt) The user to authenticate against the Swift authentication service (deprecated) |
| [glance_store] | |
default_swift_reference = ref1 |
(StrOpt) The reference to the default swift account/backing store parameters to use for adding new images. |
swift_store_admin_tenants = |
(ListOpt) A list of tenants that will be granted read/write access on all Swift containers created by Glance in multi-tenant mode. |
swift_store_auth_address = None |
(StrOpt) The address where the Swift authentication service is listening.(deprecated) |
swift_store_auth_insecure = False |
(BoolOpt) If True, swiftclient won't check for a valid SSL certificate when authenticating. |
swift_store_auth_version = 2 |
(StrOpt) Version of the authentication service to use. Valid versions are 2 for keystone and 1 for swauth and rackspace. (deprecated) |
swift_store_cacert = None |
(StrOpt) A string giving the CA certificate file to use in SSL connections for verifying certs. |
swift_store_config_file = None |
(StrOpt) The config file that has the swift account(s)configs. |
swift_store_container = glance |
(StrOpt) Container within the account that the account should use for storing images in Swift when using single container mode. In multiple container mode, this will be the prefix for all containers. |
swift_store_create_container_on_put = False |
(BoolOpt) A boolean value that determines if we create the container if it does not exist. |
swift_store_endpoint = None |
(StrOpt) If set, the configured endpoint will be used. If None, the storage url from the auth response will be used. |
swift_store_endpoint_type = publicURL |
(StrOpt) A string giving the endpoint type of the swift service to use (publicURL, adminURL or internalURL). This setting is only used if swift_store_auth_version is 2. |
swift_store_key = None |
(StrOpt) Auth key for the user authenticating against the Swift authentication service. (deprecated) |
swift_store_large_object_chunk_size = 200 |
(IntOpt) The amount of data written to a temporary disk buffer during the process of chunking the image file. |
swift_store_large_object_size = 5120 |
(IntOpt) The size, in MB, that Glance will start chunking image files and do a large object manifest in Swift. |
swift_store_multi_tenant = False |
(BoolOpt) If set to True, enables multi-tenant storage mode which causes Glance images to be stored in tenant specific Swift accounts. |
swift_store_multiple_containers_seed = 0 |
(IntOpt) 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 containers are created.Used only when swift_store_multi_tenant is disabled. 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. |
swift_store_region = None |
(StrOpt) The region of the swift endpoint to be used for single tenant. This setting is only necessary if the tenant has multiple swift endpoints. |
swift_store_retry_get_count = 0 |
(IntOpt) The number of times a Swift download will be retried before the request fails. |
swift_store_service_type = object-store |
(StrOpt) 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_ssl_compression = True |
(BoolOpt) 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, eg qcow2. |
swift_store_user = None |
(StrOpt) The user to authenticate against the Swift authentication service (deprecated) |
