88 lines
3.9 KiB
Python
88 lines
3.9 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_log import log as logging
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from heat.common import exception
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from heat.common.i18n import _
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LOG = logging.getLogger(__name__)
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PARAMETER_GROUPS = 'parameter_groups'
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PARAMETERS = 'parameters'
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class ParameterGroups(object):
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"""The ParameterGroups specified by the stack's template."""
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def __init__(self, tmpl):
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self.tmpl = tmpl
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self.parameters = tmpl.parameters(None, {}, param_defaults={})
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self.parameter_names = []
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if self.parameters:
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self.parameter_names = [param for param in self.parameters]
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self.parameter_groups = tmpl.get(PARAMETER_GROUPS)
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def validate(self):
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"""Validate the parameter group.
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Validate that each parameter belongs to only one Parameter Group and
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that each parameter name in the group references a valid parameter.
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"""
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LOG.debug('Validating Parameter Groups: %s',
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', '.join(self.parameter_names))
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if self.parameter_groups:
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if not isinstance(self.parameter_groups, list):
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raise exception.StackValidationFailed(
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error=_('Parameter Groups error'),
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path=[PARAMETER_GROUPS],
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message=_('The %s should be a list.') % PARAMETER_GROUPS)
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# Loop through groups and validate parameters
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grouped_parameters = []
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for group in self.parameter_groups:
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parameters = group.get(PARAMETERS)
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if parameters is None:
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raise exception.StackValidationFailed(
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error=_('Parameter Groups error'),
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path=[PARAMETER_GROUPS, group.get('label', '')],
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message=_('The %s must be provided for '
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'each parameter group.') % PARAMETERS)
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if not isinstance(parameters, list):
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raise exception.StackValidationFailed(
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error=_('Parameter Groups error'),
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path=[PARAMETER_GROUPS, group.get('label', '')],
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message=_('The %s of parameter group '
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'should be a list.') % PARAMETERS)
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for param in parameters:
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# Check if param has been added to a previous group
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if param in grouped_parameters:
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raise exception.StackValidationFailed(
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error=_('Parameter Groups error'),
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path=[PARAMETER_GROUPS, group.get('label', '')],
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message=_(
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'The %s parameter must be assigned to one '
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'parameter group only.') % param)
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else:
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grouped_parameters.append(param)
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# Check that grouped parameter references a valid Parameter
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if param not in self.parameter_names:
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raise exception.StackValidationFailed(
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error=_('Parameter Groups error'),
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path=[PARAMETER_GROUPS, group.get('label', '')],
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message=_(
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'The grouped parameter %s does not reference '
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'a valid parameter.') % param)
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