Allow dependencies to be resolved automatically and merged with stack configs, resolve global deps, code cleanup
This commit is contained in:
Stefan Reimer
parent
5e76eabbc5
commit
54df655648
@ -126,14 +126,19 @@ def sort_stacks(ctx, stacks):
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data = {}
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for s in stacks:
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# Resolve dependencies
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# To resolve dependencies we have to read each template
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s.read_template_file()
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deps = []
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for d in s.dependencies:
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# For now we assume deps are artifacts so we prepend them with our local profile and region to match stack.id
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for dep_stack in cb.filter_stacks({'region': s.region, 'profile': s.profile, 'provides': d}):
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deps.append(dep_stack.id)
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# also look for global services
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for dep_stack in cb.filter_stacks({'region': 'global', 'profile': s.profile, 'provides': d}):
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deps.append(dep_stack.id)
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data[s.id] = set(deps)
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logger.debug("Stack {} depends on {}".format(s.id, deps))
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for k, v in data.items():
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v.discard(k) # Ignore self dependencies
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@ -22,6 +22,9 @@ def get_custom_att(context, att=None, ResourceName="FortyTwo", attributes={}, fl
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attributes for the specified CustomResource to include them later in
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the actual CustomResource include property """
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if ResourceName not in attributes:
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attributes[ResourceName] = set()
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# If flush is set all we do is empty our state dict
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if flush:
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attributes.clear()
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@ -32,21 +35,24 @@ def get_custom_att(context, att=None, ResourceName="FortyTwo", attributes={}, fl
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return attributes
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# If dependencies, return all Artifacts this stack depends on, which are the attr of FortyTwo
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config = context.get_all()['_config']
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if dependencies:
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deps = set()
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if ResourceName in attributes:
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for att in attributes[ResourceName]:
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try:
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for att in attributes['FortyTwo']:
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deps.add(att.split('.')[0])
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except KeyError:
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pass
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# Incl. FortyTwo itself if any FortyTwo function is used
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if config['cfn']['Mode'] == "FortyTwo" and attributes:
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deps.add('FortyTwo')
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return list(deps)
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# If call with an attribute, return fragement and register
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if att:
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if ResourceName not in attributes:
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attributes[ResourceName] = set()
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attributes[ResourceName].add(att)
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config = context.get_all()['_config']
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if config['cfn']['Mode'] == "FortyTwo":
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return('{{ "Fn::GetAtt": ["{0}", "{1}"] }}'.format(ResourceName, att))
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elif config['cfn']['Mode'] == "AWSImport" and ResourceName == "FortyTwo":
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@ -48,6 +48,7 @@ class Stack(object):
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self.provides = template
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self.cfn_template = None
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self.cfn_parameters = []
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self.cfn_data = None
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self.connection_manager = BotoConnection(self.profile, self.region)
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self.ctx = ctx
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self.status = None
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@ -62,7 +63,7 @@ class Stack(object):
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def read_config(self):
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_config = read_yaml_file(self.path)
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for p in ["region", "stackname", "template", "dependencies", "default_lock", "multi_delete", "provides"]:
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for p in ["region", "stackname", "template", "default_lock", "multi_delete", "provides"]:
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if p in _config:
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setattr(self, p, _config[p])
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@ -76,6 +77,10 @@ class Stack(object):
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if 'vars' in _config:
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self.template_vars = dict_merge(self.template_vars, _config['vars'])
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if 'dependencies' in _config:
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for dep in _config['dependencies']:
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self.dependencies.add(dep)
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logger.debug("Stack {} added.".format(self.id))
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@ -153,7 +158,7 @@ class Stack(object):
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rendered = template.render({ 'cfn': self.template_vars, 'Metadata': template_metadata })
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try:
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data = yaml.load(rendered)
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self.data = yaml.load(rendered)
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except:
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# In case we rendered invalid yaml this helps to debug
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logger.error(rendered)
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@ -162,15 +167,27 @@ class Stack(object):
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# Some sanity checks and final cosmetics
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# Check for empty top level Parameters, Outputs and Conditions and remove
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for key in ['Parameters', 'Outputs', 'Conditions']:
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if key in data and data[key] is None:
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if key in self.data and self.data[key] is None:
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# Delete from data structure which also takes care of json
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del data[key]
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del self.data[key]
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# but also remove from rendered for the yaml file
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rendered = rendered.replace('\n'+key+":",'')
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# Condense multiple empty lines to one
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self.cfn_template = re.sub(r'\n\s*\n', '\n\n', rendered)
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# Update internal data structures
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self._parse_metadata()
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def _parse_metadata(self):
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# Extract dependencies if present
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try:
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for dep in self.data['Metadata']['CloudBender']['Dependencies']:
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self.dependencies.add(dep)
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except KeyError:
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pass
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def write_template_file(self):
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if self.cfn_template:
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@ -194,20 +211,26 @@ class Stack(object):
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def read_template_file(self):
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yaml_file = os.path.join(self.ctx['template_path'], self.rel_path, self.stackname+".yaml")
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with open(yaml_file, 'r') as yaml_contents:
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self.cfn_template = yaml_contents.read()
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logger.debug('Read cfn template %s.', yaml_file)
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""" Reads rendered yaml template from disk and extracts metadata """
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if not self.cfn_template:
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yaml_file = os.path.join(self.ctx['template_path'], self.rel_path, self.stackname+".yaml")
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with open(yaml_file, 'r') as yaml_contents:
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self.cfn_template = yaml_contents.read()
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logger.debug('Read cfn template %s.', yaml_file)
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self.data = yaml.load(self.cfn_template)
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self._parse_metadata()
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else:
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logger.debug('Using cached cfn template %s.', yaml_file)
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def validate(self):
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"""Validates the rendered template via cfn-lint"""
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if not self.cfn_template:
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self.read_template_file()
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self.read_template_file()
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data = yaml.load(self.cfn_template)
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try:
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ignore_checks = data['Metadata']['cfnlint_ignore']
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ignore_checks = self.data['Metadata']['cfnlint_ignore']
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except KeyError:
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ignore_checks = []
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@ -238,10 +261,7 @@ class Stack(object):
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def resolve_parameters(self):
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""" Renders parameters for the stack based on the source template and the environment configuration """
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if not self.cfn_template:
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self.read_template_file()
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data = yaml.load(self.cfn_template)
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self.read_template_file()
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# Inspect all outputs of the running Conglomerate members
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# if we run in Piped Mode
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@ -252,9 +272,9 @@ class Stack(object):
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# except KeyError:
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# pass
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if 'Parameters' in data:
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if 'Parameters' in self.data:
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self.cfn_parameters = []
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for p in data['Parameters']:
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for p in self.data['Parameters']:
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# In Piped mode we try to resolve all Paramters first via stack_outputs
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#if config['cfn']['Mode'] == "Piped":
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# try:
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@ -274,7 +294,7 @@ class Stack(object):
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logger.info('Got {} = {}'.format(p,value))
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except KeyError as e:
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# If we have a Default defined in the CFN skip, as AWS will use it
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if 'Default' in data['Parameters'][p]:
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if 'Default' in self.data['Parameters'][p]:
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continue
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else:
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logger.error('Cannot find value for parameter {0}'.format(p))
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@ -310,9 +330,7 @@ class Stack(object):
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# Prepare parameters
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self.resolve_parameters()
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self.write_parameter_file()
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if not self.cfn_template:
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self.read_template_file()
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self.read_template_file()
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logger.info('Creating {0} {1}'.format(self.region, self.stackname))
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response = self.connection_manager.call('cloudformation', 'create_stack',
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@ -332,9 +350,7 @@ class Stack(object):
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# Prepare parameters
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self.resolve_parameters()
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self.write_parameter_file()
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if not self.cfn_template:
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self.read_template_file()
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self.read_template_file()
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logger.info('Updating {0} {1}'.format(self.region, self.stackname))
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try:
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@ -372,9 +388,7 @@ class Stack(object):
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# Prepare parameters
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self.resolve_parameters()
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self.write_parameter_file()
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if not self.cfn_template:
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self.read_template_file()
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self.read_template_file()
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logger.info('Creating change set {0} for stack {1}'.format(change_set_name, self.stackname))
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response = self.connection_manager.call('cloudformation', 'create_change_set',
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