def use_thin_logic(share_type):
# NOTE(xyang): To preserve the existing behavior, we use thin logic
# to evaluate in two cases:
# 1) 'thin_provisioning' is not set in extra specs (This is for
# backward compatibility. If not set, the scheduler behaves
# the same as before this bug fix).
# 2) 'thin_provisioning' is set in extra specs and it is
# '<is> True' or 'True'.
# Otherwise we use the thick logic to evaluate.
use_thin_logic = True
thin_spec = None
try:
thin_spec = share_type.get('extra_specs', {}).get('thin_provisioning')
if thin_spec is None:
thin_spec = share_type.get(
'extra_specs', {}).get('capabilities:thin_provisioning')
# NOTE(xyang) 'use_thin_logic' and 'thin_provisioning' are NOT
# the same thing. The first purpose of "use_thin_logic" is to
# preserve the existing scheduler behavior if 'thin_provisioning'
# is NOT in extra_specs (if thin_spec is None, use_thin_logic
# should be True). The second purpose of 'use_thin_logic'
# is to honor 'thin_provisioning' if it is in extra specs (if
# thin_spec is set to True, use_thin_logic should be True; if
# thin_spec is set to False, use_thin_logic should be False).
use_thin_logic = strutils.bool_from_string(
thin_spec, strict=True) if thin_spec is not None else True
except ValueError:
# Check if the value of thin_spec is '<is> True'.
if thin_spec is not None and not extra_specs_ops.match(
True, thin_spec):
use_thin_logic = False
return use_thin_logic
def use_thin_logic(share_type):
# NOTE(xyang): To preserve the existing behavior, we use thin logic
# to evaluate in two cases:
# 1) 'thin_provisioning' is not set in extra specs (This is for
# backward compatibility. If not set, the scheduler behaves
# the same as before this bug fix).
# 2) 'thin_provisioning' is set in extra specs and it is
# '<is> True' or 'True'.
# Otherwise we use the thick logic to evaluate.
use_thin_logic = True
thin_spec = None
try:
thin_spec = share_type.get('extra_specs', {}).get(
'thin_provisioning')
if thin_spec is None:
thin_spec = share_type.get('extra_specs', {}).get(
'capabilities:thin_provisioning')
# NOTE(xyang) 'use_thin_logic' and 'thin_provisioning' are NOT
# the same thing. The first purpose of "use_thin_logic" is to
# preserve the existing scheduler behavior if 'thin_provisioning'
# is NOT in extra_specs (if thin_spec is None, use_thin_logic
# should be True). The second purpose of 'use_thin_logic'
# is to honor 'thin_provisioning' if it is in extra specs (if
# thin_spec is set to True, use_thin_logic should be True; if
# thin_spec is set to False, use_thin_logic should be False).
use_thin_logic = strutils.bool_from_string(
thin_spec, strict=True) if thin_spec is not None else True
except ValueError:
# Check if the value of thin_spec is '<is> True'.
if thin_spec is not None and not extra_specs_ops.match(
True, thin_spec):
use_thin_logic = False
return use_thin_logic
def capabilities_satisfied(capabilities, extra_specs):
# These extra-specs are not capabilities for matching hosts
ignored_extra_specs = (
'availability_zones',
'capabilities:availability_zones',
)
for key, req in extra_specs.items():
# Ignore some extra_specs if told to
if key in ignored_extra_specs:
continue
# Either not scoped format, or in capabilities scope
scope = key.split(':')
# Ignore scoped (such as vendor-specific) capabilities
if len(scope) > 1 and scope[0] != "capabilities":
continue
# Strip off prefix if spec started with 'capabilities:'
elif scope[0] == "capabilities":
del scope[0]
cap = capabilities
for index in range(len(scope)):
try:
cap = cap.get(scope[index])
except AttributeError:
cap = None
if cap is None:
LOG.debug(
"Host doesn't provide capability '%(cap)s' "
"listed in the extra specs", {'cap': scope[index]})
return False
# Make all capability values a list so we can handle lists
cap_list = [cap] if not isinstance(cap, list) else cap
# Loop through capability values looking for any match
for cap_value in cap_list:
if extra_specs_ops.match(cap_value, req):
break
else:
# Nothing matched, so bail out
LOG.debug(
'Share type extra spec requirement '
'"%(key)s=%(req)s" does not match reported '
'capability "%(cap)s"', {
'key': key,
'req': req,
'cap': cap
})
return False
return True
def _satisfies_extra_specs(self, capabilities, resource_type):
"""Compare capabilities against extra specs.
Check that the capabilities provided by the services satisfy
the extra specs associated with the resource type.
"""
extra_specs = resource_type.get('extra_specs', [])
if not extra_specs:
return True
for key, req in extra_specs.items():
# Either not scoped format, or in capabilities scope
scope = key.split(':')
# Ignore scoped (such as vendor-specific) capabilities
if len(scope) > 1 and scope[0] != "capabilities":
continue
# Strip off prefix if spec started with 'capabilities:'
elif scope[0] == "capabilities":
del scope[0]
cap = capabilities
for index in range(len(scope)):
try:
cap = cap.get(scope[index])
except AttributeError:
cap = None
if cap is None:
LOG.debug(
"Host doesn't provide capability '%(cap)s' "
"listed in the extra specs", {'cap': scope[index]})
return False
# Make all capability values a list so we can handle lists
cap_list = [cap] if not isinstance(cap, list) else cap
# Loop through capability values looking for any match
for cap_value in cap_list:
if extra_specs_ops.match(cap_value, req):
break
else:
# Nothing matched, so bail out
LOG.debug(
'Share type extra spec requirement '
'"%(key)s=%(req)s" does not match reported '
'capability "%(cap)s"', {
'key': key,
'req': req,
'cap': cap
})
return False
return True
def _satisfies_extra_specs(self, capabilities, resource_type):
"""Compare capabilities against extra specs.
Check that the capabilities provided by the services satisfy
the extra specs associated with the resource type.
"""
extra_specs = resource_type.get('extra_specs', [])
if not extra_specs:
return True
for key, req in extra_specs.items():
# Either not scoped format, or in capabilities scope
scope = key.split(':')
# Ignore scoped (such as vendor-specific) capabilities
if len(scope) > 1 and scope[0] != "capabilities":
continue
# Strip off prefix if spec started with 'capabilities:'
elif scope[0] == "capabilities":
del scope[0]
cap = capabilities
for index in range(len(scope)):
try:
cap = cap.get(scope[index])
except AttributeError:
cap = None
if cap is None:
LOG.debug("Host doesn't provide capability '%(cap)s' "
"listed in the extra specs",
{'cap': scope[index]})
return False
# Make all capability values a list so we can handle lists
cap_list = [cap] if not isinstance(cap, list) else cap
# Loop through capability values looking for any match
for cap_value in cap_list:
if extra_specs_ops.match(cap_value, req):
break
else:
# Nothing matched, so bail out
LOG.debug('Share type extra spec requirement '
'"%(key)s=%(req)s" does not match reported '
'capability "%(cap)s"',
{'key': key, 'req': req, 'cap': cap})
return False
return True
def _do_extra_specs_ops_test(self, value, req, matches):
assertion = self.assertTrue if matches else self.assertFalse
assertion(extra_specs_ops.match(value, req))
def _do_extra_specs_ops_test(self, value, req, matches):
assertion = self.assertTrue if matches else self.assertFalse
assertion(extra_specs_ops.match(value, req))
