drydock/helm_drydock/model

Drydock Model

Models for the drydock design parts and subparts

Features

Inheritance

Drydock supports inheritance in the design data model.

Currently this only supports BaremetalNode inheriting from HostProfile and HostProfile inheriting from HostProfile.

Inheritance rules:

1. A child overrides a parent for part and subpart attributes
2. For attributes that are lists, the parent list and child list are merged.
3. A child can remove a list member by prefixing the value with '!'
4. For lists of subparts (i.e. HostInterface and HostPartition) if there is a member in the parent list and child list with the same name (as defined by the get_name() method), the child member inherits from the parent member. The '!' prefix applies here for deleting a member based on the name.

Phased Data

In other words, as a modeled object goes from design to apply to build the model keeps the data separated to retain reference values and provide context around particular attribute values.

• Design - The data ingested from sources such as Formation
• Apply - Computing inheritance of design data to render an effective site design
• Build - Maintaining actions taken to implement the design and the results

Currently only applies to BaremetalNodes as no other design parts flow through the build process.