Align IaaS Image metadata between SCS and Gaia-X

[anjastrunk]

SCS describes images with a set of meta data, which are defined in Image Metadata Standards.

As a provider, I want to publish my image properties within a Gaia-X Credential. Gaia-X Credential schema has to offer appropriate vocabulary to describe image metadata from Image Metadata Standards.

[anjastrunk]

Technical requirements and features

Gaia-X provides dedicated classed, called VM_Image and PXI_Image for virtual and bare metal images. The attributes of these classes to describe technical requirements and features are limited to requirements for CPU and RAM. Gaia-X Credential Schema has to be updated by properties proposed by https://docs.openstack.org/glance/latest//admin/useful-image-properties. I did this in MR !190.

Mapping SCS to Gaia-X

SCS Image metadata	attribute of Gaia-X class VM_Image	comments
architecture	cpuReq.cpuArchitecture	Gaia-X supports x86_32, x86_64, AArch-32, AArch-64, and, RISC-V, only. The mapping is as follows: - i686: x86_32 - x86_64, ia64: x86_64 - aarch6: AArch-32 - alpha, armv7l, lm32, openrisc, parisc, parisc64, unicore32: RISC-V All other architecture types in image properties are mapped to others
min_ram	ramReq.Memory.value
min_disk_size	rootDiskReq.Disk.value
os_version	operatingSystem.version
os_distro	operatingSystem.distribution
hw_rng_model	hwRngType
hw_disk_bus	rootDiskReq.diskBusType
os_secure_boot	secureBoot
hw_firmware_type	firmwareType
hw_watchdog_action	watchDogAction
hw_mem_encryption	ramReq.hardwareEncryption
hw_pmu	vPMU
hw_video_ram	videoRamSize
hw_vif_multiqueue_enabled	multiQueues

[anjastrunk]

Image handling aspects

Image updating

Gaia-X does not provide any attributes to describe providers frequency on updating images. These capabilities have to be added to Gaia-X Credential Schema, see MR !190.

Image Origin

SCS dictates two mandatory attributes. image_source point to the URL to download the image, which is a technical properties with no need to include this information into Gaia-X Credentials. image_description contains further information with release notes and other human readable data about the image. This metadata can be mapped to Gaia-X optional attribute description, which is part of each Gaia-X entity. SCS's optional attribute managed_by_VENDOR can be mapped as part of Gaia-X attribute description

Image build info

Gaia-X does not provide possibilities to describe image's build information. Gaia-X Credential Schema have to be extended, see !190.

Details on image's check sum are already support by Gaia-X via special class CheckSum

Licensing / Maintenance subscription / Support

Gaia-X models VM images as Software Resources. According to Gaia-X [Trust Framework](https://docs.gaia-x.eu/policy-rules-committee/trust-framework/latest/, a Software Resources requires the definition of the license and the copyright owner. Other attributes with respect to licensing, maintenance subscription and support are not provided by Gaia-X and have to be added, see MR !190.

Mapping SCS to Gaia-X

SCS Image metadata	attribute of Gaia-X class VM_Image	Comments
replace_frequency	updateStrategy.replaceFrequency
hotfix_hours	updateStrategy.hotfixHours
uuid_validity	updateStrategy.validUntil
provided_until	updateStrategy.providedUntil
image_source	none	technical property required at runtime and not relevant for Gaia-X Credentials.
image_description	description
managed_by_VENDOR	description
image_build_date	buildDate
image_original_user	none	technical property required at runtime and not relevant for Gaia-X Credentials.
patchlevel	patchLevel
os_hash_algo	checkSum.algo
os_hash_value	checkSum.value
license_required	license	License MUST point to SPDX identifiers or URL to document. Based license and the value of attribute licenseIncluded, customers can deduce if they have to bring their own license or not. Content of license as defined by Gaia-X attribute license, is currently not support by SCS, see SovereignCloudStack/standards#369
subscription_included	subscription_included
licenseIncluded	licenseIncluded
maintained_until	maintained_until
l1_support_contact	none	technical property required at runtime and not relevant for Gaia-X Credentials.

[anjastrunk]

Update SCS Gaia-X Credential Generator in #67

[anjastrunk]

Closed with PR #67