Image metadataImage metadata can help end users determine the nature of an image, and is used by
associated OpenStack components and drivers which interface with the Image Service.Metadata can also determine the scheduling of hosts. If the option
is set on an image, and Compute is configured so that the
ImagePropertiesFilter scheduler filter is enabled (default), then the
scheduler only considers compute hosts that satisfy that property.Compute's ImagePropertiesFilter value is specified in the
value in the
/etc/nova/nova.conf file.You can add metadata to Image Service images by using the option with the
glance image-create or glance image-update command. More
than one property can be specified. For example:$glance image-update img-uuid --property architecture=arm --property hypervisor_type=qemuCommon image properties are also specified in the
/etc/glance/schema-image.json file. For a complete list of valid property
keys and values, refer to the OpenStack
Command-Line Reference.All associated properties for an image can be displayed using the glance
image-show command. For example:$glance image-show myCirrosImage+---------------------------------------+--------------------------------------+
| Property | Value |
+---------------------------------------+--------------------------------------+
| Property 'base_image_ref' | 397e713c-b95b-4186-ad46-6126863ea0a9 |
| Property 'image_location' | snapshot |
| Property 'image_state' | available |
| Property 'image_type' | snapshot |
| Property 'instance_type_ephemeral_gb' | 0 |
| Property 'instance_type_flavorid' | 2 |
| Property 'instance_type_id' | 5 |
| Property 'instance_type_memory_mb' | 2048 |
| Property 'instance_type_name' | m1.small |
| Property 'instance_type_root_gb' | 20 |
| Property 'instance_type_rxtx_factor' | 1 |
| Property 'instance_type_swap' | 0 |
| Property 'instance_type_vcpu_weight' | None |
| Property 'instance_type_vcpus' | 1 |
| Property 'instance_uuid' | 84c6e57d-a6b1-44b6-81eb-fcb36afd31b5 |
| Property 'kernel_id' | df430cc2-3406-4061-b635-a51c16e488ac |
| Property 'owner_id' | 66265572db174a7aa66eba661f58eb9e |
| Property 'ramdisk_id' | 3cf852bd-2332-48f4-9ae4-7d926d50945e |
| Property 'user_id' | 376744b5910b4b4da7d8e6cb483b06a8 |
| checksum | 8e4838effa1969ad591655d6485c7ba8 |
| container_format | ami |
| created_at | 2013-07-22T19:45:58 |
| deleted | False |
| disk_format | ami |
| id | 7e5142af-1253-4634-bcc6-89482c5f2e8a |
| is_public | False |
| min_disk | 0 |
| min_ram | 0 |
| name | myCirrosImage |
| owner | 66265572db174a7aa66eba661f58eb9e |
| protected | False |
| size | 14221312 |
| status | active |
| updated_at | 2013-07-22T19:46:42 |
+---------------------------------------+--------------------------------------+