MeshModel aims to address the limitations of the current object model used in Meshery. MeshModel is designed to provide a consistent and extensible way of capturing various use cases and communicating within the Meshery ecosystem.
Here are the key aspects and characteristics of MeshModel:
MeshModel serves as an internal model within Meshery, defining constructs and their relationships, and enabling consistent communication between components.
MeshModel adheres to several design principles, including establishing a set of constructs, clearly defining construct boundaries, allowing construct extension, reusing existing models, being user-centric, and simplifying complex networking and distributed systems.
MeshModel introduces various core constructs that form the foundation of the model. Some of the core constructs mentioned in the document include Components, Designs, Patterns, Traits, Metrics, Actions, Color, and Relationships. Models having the same
version attributes are considered duplicates.
Components represent entities in the Meshery ecosystem, exposing capabilities of the underlying platform. They can be registered, created, and used by users and operators. Components have definitions, instances, and associated metadata. Components having the same
model.name attributes are considered duplicates.
Designs are deployable units in Meshery that describe the desired infrastructure. They consist of components and patterns, allowing users to define and configure the behavior of their cloud-native applications.
Patterns augment the operational behavior of a deployed instance of a design. They define best practices for configuring and operating cloud-native application functionality. Patterns can be applied to components or designs, and they are read-only.
Traits provide additional details about a component in Meshery. They offer specific functionality or characteristics associated with a component, enhancing its capabilities. Traits can be attached to components to customize their behavior.
Metrics, Actions, Color
MeshModel includes constructs for managing metrics, defining actions, and specifying color properties of components or designs. These constructs help in monitoring, controlling, and visualizing different aspects of the Meshery ecosystem.
Relationships define the nature of interaction between interconnected components in MeshModel. They represent various types of connections and dependencies between components, such as hierarchical, network, or default relationships. Relationships have selectors, metadata, and optional parameters.
MeshModel supports packaging constructs as OCI-compatible images, making them portable and encapsulating intellectual property. Model packages can include multiple MeshModel constructs, facilitating reusability and versioning.
Evaluation and Policies
MeshModel provides a model evaluation algorithm to ensure desired behavior enforcement. Policies can be applied to components and relationships, defining rules and actions based on predefined conditions.