+
+
+def get_nova_version(cloud):
+ """ Get Nova API microversion
+
+ Returns:
+
+ - Nova API microversion
+ - None on operation error
+ """
+ # pylint: disable=protected-access
+ try:
+ request = cloud._compute_client.request("/", "GET")
+ LOGGER.debug('cloud._compute_client.request: %s', request)
+ version = request["version"]["version"]
+ major, minor = version.split('.')
+ LOGGER.debug('nova version: %s', (int(major), int(minor)))
+ return (int(major), int(minor))
+ except Exception: # pylint: disable=broad-except
+ LOGGER.exception("Cannot detect Nova version")
+ return None
+
+
+def get_openstack_version(cloud):
+ """ Detect OpenStack version via Nova API microversion
+
+ It follows MicroversionHistory_.
+
+ Returns:
+
+ - OpenStack release
+ - Unknown on operation error
+
+ .. _MicroversionHistory:
+ https://docs.openstack.org/nova/latest/reference/api-microversion-history.html
+ """
+ version = get_nova_version(cloud)
+ try:
+ assert version
+ if version > (2, 60):
+ osversion = "Rocky or newer"
+ elif version > (2, 53):
+ osversion = "Queens"
+ elif version > (2, 42):
+ osversion = "Pike"
+ elif version > (2, 38):
+ osversion = "Ocata"
+ elif version > (2, 25):
+ osversion = "Newton"
+ elif version > (2, 12):
+ osversion = "Mitaka"
+ elif version > (2, 3):
+ osversion = "Liberty"
+ elif version >= (2, 1):
+ osversion = "Kilo"
+ else:
+ osversion = "Unknown"
+ LOGGER.info('Detect OpenStack version: %s', osversion)
+ return osversion
+ except AssertionError:
+ LOGGER.exception("Cannot detect OpenStack version")
+ return "Unknown"