def add_instance()

in playbooks/edx-east/ec2.py [0:0]

• 46 lines of code
• 11 McCabe index (conditional complexity)

    def add_instance(self, instance, region):
        ''' Adds an instance to the inventory and index, as long as it is
        addressable '''

        # Only want running instances
        if instance.state != 'running':
            return

        # Select the best destination address
        if instance.subnet_id:
            dest = getattr(instance, self.vpc_destination_variable)
        else:
            dest =  getattr(instance, self.destination_variable)

        if not dest:
            # Skip instances we cannot address (e.g. private VPC subnet)
            return

        # Add to index
        self.index[dest] = [region, instance.id]

        # Inventory: Group by instance ID (always a group of 1)
        self.inventory[instance.id] = [dest]

        # Inventory: Group by region
        self.push(self.inventory, region, dest)

        # Inventory: Group by availability zone
        self.push(self.inventory, instance.placement, dest)

        # Inventory: Group by instance type
        self.push(self.inventory, self.to_safe('type_' + instance.instance_type), dest)

        # Inventory: Group by key pair
        if instance.key_name:
            self.push(self.inventory, self.to_safe('key_' + instance.key_name), dest)

        # Inventory: Group by security group
        try:
            for group in instance.groups:
                key = self.to_safe("security_group_" + group.name)
                self.push(self.inventory, key, dest)
        except AttributeError:
            print 'Package boto seems a bit older.'
            print 'Please upgrade boto >= 2.3.0.'
            sys.exit(1)

        # Inventory: Group by tag keys
        for k, v in instance.tags.iteritems():
            key = self.to_safe("tag_" + k + "=" + v)
            self.push(self.inventory, key, dest)
            self.keep_first(self.inventory, 'first_in_' + key, dest)

        # Inventory: Group by Route53 domain names if enabled
        if self.route53_enabled:
            route53_names = self.get_instance_route53_names(instance)
            for name in route53_names:
                self.push(self.inventory, name, dest)