sigsk8siocontrollerruntime

Sigsk8siocontrollerruntime is a runtime component in the Sigsk8s platform, a modular extension to Kubernetes designed to manage input/output control resources at scale. It provides the execution environment and lifecycle management for I/O controller logic, enabling declarative control through Kubernetes APIs. The runtime is intended to operate as part of the Sigsk8s controller ecosystem, coordinating with the Kubernetes control plane and the Sigsk8s API surface.

The runtime watches custom resources that describe I/O controllers, their bindings, and adapters, and it reconciles the actual cluster state with the desired specification. It is typically deployed alongside other Sigsk8s controllers and integrates with the Kubernetes API server and etcd for state persistence. It supports multi-namespace operation, role-based access control, and robust error handling to ensure stability in dynamic cluster environments.

Architecture and components typically include a controller-manager style process, client libraries for API access, and a set of adapter plugins that provide support for various I/O standards and devices. Observability features such as metrics, health probes, and event logging are included to aid monitoring and debugging. The runtime relies on a reconciliation loop to manage resources like IoController, IoBinding, and IoAdapter, applying changes in an idempotent fashion.

Deployment considerations involve ensuring appropriate RBAC permissions, network access to the Kubernetes API server, and adequate resource requests for CPU and memory. Performance and scalability depend on the number of controllers and adapters managed, as well as the configured replica count. The runtime is designed to be extensible through adapters and is intended to integrate with standard Kubernetes tooling and workflows.

See also: Kubernetes, Custom Resource Definitions, Operator pattern, Sigsk8s.