Versions & Microversions

Quake AI runs OpenStack Antelope (2023.1). Some services support microversions: incremental API extensions you can opt into per-request. Quake AI has a microversion ceiling per service: requests above the ceiling return 406 Not Acceptable.

Per-service version ceilings

Service	OpenStack project	API version	Max microversion on Quake AI	Current upstream (Epoxy)
Compute	Nova	v2.1	2.95	2.100
Block Storage	Cinder	v3	3.70	3.71
Network	Neutron	v2.0	No microversions (extension-based)
Object Storage	Swift	v1	No microversions
Automation	Heat	v1	Template version 2021-04-06
Kubernetes	Magnum	v1	K8s 1.25–1.27

Using microversions

Include the OpenStack-API-Version header to request a specific microversion. Omit the header to use the base version.

# Request Nova Compute API microversion 2.95
curl -s \
  -H "X-Auth-Token: $TOKEN" \
  -H "OpenStack-API-Version: compute 2.95" \
  https://compute.us-east-1.rumble.cloud/v2.1/servers

Key limitations vs. upstream

Nova: The os-volumes_boot API is not deprecated on Quake AI yet; upstream deprecated it in Caracal (microversion 2.96).
Cinder: os-extend_volume_completion is not available; it requires microversion 3.71.
Heat: Heat is not deprecated on Quake AI yet but is deprecated upstream in Epoxy. Plan for a CAPI (Cluster API) migration for orchestration workflows that depend on Heat long term.
Swift S3 compatibility: No lifecycle policies, no S3 notifications, no IAM-style ACLs, and limited versioning compared to AWS S3.

What happens above the ceiling

If you request a microversion above the service ceiling, the API returns 406 Not Acceptable. The response body includes the maximum supported version:

HTTP/1.1 406 Not Acceptable
Content-Type: application/json

{
  "choices": [{
    "id": "v2.1",
    "status": "CURRENT",
    "version": "2.95",
    "min_version": "2.1"
  }]
}

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