PaaSBuilder

The PaaSBuilder is a builder that is focused on PaaS entities management. The main purpose of this builder is to provide a simple way to manage PaaS entities resources. The builder inherits from UniversalBuilder so you can override any method of the builder to provide custom logic. The builder extends the interface of the UniversalBuilder with some specific methods.

Also the builder has a set of methods allowing to schedule PaaS objects to particular agents based on the agent capabilities.

create_paas_objects

Create a list of PaaS objects. The method returns a list of PaaS objects that are required for the instance.

You don't need to implement the method create_instance_derivatives as PaaSBuilder implements it and uses the create_paas_objects method to create derivatives.

actualize_paas_objects_source_data_plane

Actualize the PaaS objects. Changes from the data plane. The method is called when the instance is outdated. For example, the instance Database has derivative PGDatabase. Single Database may have multiple PGDatabase derivatives. If any of the derivatives is outdated, this method is called to reactualize these PaaS objects.

This method replaces the actualize_outdated_instance_derivatives method of the UniversalBuilder.

enable_schedule_paas_objects

Enable schedule PaaS objects.

actualize_paas_objects_source_master

Actualize the PaaS objects. Changes from the master instance. The method is called when the instance is outdated from master instance point of view. For example, the instance Database is linked to the NodeSet instance. If the NodeSet is outdated, this method is called to reactualize the Database instance.

schedule_paas_objects

Schedule the PaaS objects. The method schedules the PaaS objects. The result is a dictionary where the key is a UUID of an agent and the value is a list of PaaS objects that should be scheduled on this agent. If you don't want to schedule the PaaS objects, skip implementation of this method.