HOT parameter validation model translation
Translate hot parameters into heat parameter model. Change-Id: I6733be7c13e2e9fdbed27d5c21044fb5f457ed17 Implements: blueprint hot-parameters
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JUN JIE NAN
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07a2840585
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929c9edd5c
@ -81,35 +81,64 @@ class HOTemplate(template.Template):
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return default
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@staticmethod
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def _snake_to_camel(name):
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tokens = []
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if name:
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tokens = name.split('_')
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for i in xrange(len(tokens)):
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tokens[i] = tokens[i].capitalize()
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return "".join(tokens)
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def _translate_constraints(self, constraints):
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param = {}
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def add_constraint(key, val, desc):
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cons = param.get(key, [])
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cons.append((val, desc))
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param[key] = cons
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def add_min_max(key, val, desc):
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minv = val.get('min')
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maxv = val.get('max')
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if minv:
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add_constraint('Min%s' % key, minv, desc)
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if maxv:
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add_constraint('Max%s' % key, maxv, desc)
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for constraint in constraints:
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desc = constraint.get('description')
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for key, val in constraint.iteritems():
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key = self._snake_to_camel(key)
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if key == 'Description':
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continue
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elif key == 'Range':
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add_min_max('Value', val, desc)
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elif key == 'Length':
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add_min_max(key, val, desc)
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else:
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add_constraint(key, val, desc)
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return param
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def _translate_parameters(self, parameters):
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"""Get the parameters of the template translated into CFN format."""
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HOT_TO_CFN_ATTRS = {'type': 'Type',
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'default': 'Default',
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'description': 'Description'}
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HOT_TO_CFN_TYPES = {'string': 'String'}
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cfn_params = {}
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for param_name, attrs in parameters.iteritems():
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cfn_param = {}
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for attr, attr_value in attrs.iteritems():
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cfn_attr = self._translate(attr, HOT_TO_CFN_ATTRS, attr)
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if attr == 'type':
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# try to translate type; if no translation found, keep
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# original value and let engine throw an error for an
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# unsupported type
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attr_value = self._translate(attr_value, HOT_TO_CFN_TYPES,
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attr_value)
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cfn_param[cfn_attr] = attr_value
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if len(cfn_param) > 0:
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cfn_params[param_name] = cfn_param
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return cfn_params
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params = {}
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for name, attrs in parameters.iteritems():
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param = {}
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for key, val in attrs.iteritems():
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key = self._snake_to_camel(key)
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if key == 'Type':
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val = self._snake_to_camel(val)
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elif key == 'Constraints':
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param.update(self._translate_constraints(val))
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continue
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elif key == 'Hidden':
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key = 'NoEcho'
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param[key] = val
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if len(param) > 0:
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params[name] = param
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return params
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def _translate_resources(self, resources):
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"""Get the resources of the template translated into CFN format."""
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@ -86,11 +86,133 @@ class HOTemplateTest(HeatTestCase):
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''')
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expected = {'param1': {'Description': 'foo',
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'Type': 'unsupported_type'}}
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'Type': 'UnsupportedType'}}
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tmpl = parser.Template(hot_tpl)
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self.assertEqual(tmpl[hot.PARAMETERS], expected)
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def test_translate_parameters_length_range(self):
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hot_tpl = template_format.parse('''
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heat_template_version: 2013-05-23
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parameters:
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wait_time:
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description: application wait time
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type: number
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default: 150
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constraints:
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- range: { min: 120, max: 600}
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description: min value 120 seconds, max value 600 seconds
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key_name:
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description: Name of an existing EC2 KeyPair
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type: string
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default: heat_key
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constraints:
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- length: {min: 1, max: 32}
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description: length should be between 1 and 32
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''')
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expected = {
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'wait_time': {
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'Description': 'application wait time',
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'Type': 'Number',
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'Default': 150,
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'MaxValue': [
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(600, 'min value 120 seconds, max value 600 seconds')],
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'MinValue': [
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(120, 'min value 120 seconds, max value 600 seconds')]
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},
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'key_name': {
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'Description': 'Name of an existing EC2 KeyPair',
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'Type': 'String',
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'Default': 'heat_key',
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'MaxLength': [(32, u'length should be between 1 and 32')],
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'MinLength': [(1, u'length should be between 1 and 32')]
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}}
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tmpl = parser.Template(hot_tpl)
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self.assertEqual(expected, tmpl[hot.PARAMETERS])
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def test_translate_parameters_allowed_values(self):
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hot_tpl = template_format.parse('''
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heat_template_version: 2013-05-23
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parameters:
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instance_type:
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description: instance type
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type: string
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default: m1.small
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constraints:
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- allowed_values: ["m1.tiny",
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"m1.small",
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"m1.medium", "m1.large", "m1.xlarge"]
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description: must be a valid EC2 instance type.
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''')
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expected = {
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'instance_type': {
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'Description': 'instance type',
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'Type': 'String',
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'Default': 'm1.small',
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'AllowedValues': [(["m1.tiny",
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"m1.small",
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"m1.medium",
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"m1.large",
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"m1.xlarge"],
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'must be a valid EC2 instance type.')]}}
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tmpl = parser.Template(hot_tpl)
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self.assertEqual(expected, tmpl[hot.PARAMETERS])
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def test_translate_parameters_allowed_patterns(self):
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hot_tpl = template_format.parse('''
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heat_template_version: 2013-05-23
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parameters:
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db_name:
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description: The WordPress database name
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type: string
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default: wordpress
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constraints:
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- length: { min: 1, max: 64 }
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description: string lenght should between 1 and 64
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- allowed_pattern: "[a-zA-Z]+"
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description: Value must consist of characters only
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- allowed_pattern: "[a-z]+[a-zA-Z]*"
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description: Value must start with a lowercase character
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''')
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expected = {
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'db_name': {
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'Description': 'The WordPress database name',
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'Type': 'String',
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'Default': 'wordpress',
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'MinLength': [(1, 'string lenght should between 1 and 64')],
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'MaxLength': [(64, 'string lenght should between 1 and 64')],
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'AllowedPattern': [
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('[a-zA-Z]+',
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'Value must consist of characters only'),
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('[a-z]+[a-zA-Z]*',
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'Value must start with a lowercase character')]}}
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tmpl = parser.Template(hot_tpl)
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self.assertEqual(expected, tmpl[hot.PARAMETERS])
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def test_translate_parameters_hidden(self):
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hot_tpl = template_format.parse('''
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heat_template_version: 2013-05-23
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parameters:
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user_roles:
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description: User roles
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type: comma_delimited_list
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default: guest,newhire
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hidden: TRUE
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''')
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expected = {
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'user_roles': {
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'Description': 'User roles',
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'Type': 'CommaDelimitedList',
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'Default': 'guest,newhire',
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'NoEcho': True
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}}
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tmpl = parser.Template(hot_tpl)
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self.assertEqual(expected, tmpl[hot.PARAMETERS])
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def test_translate_resources(self):
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"""Test translation of resources into internal engine format."""
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