Glossary #
- Primary Resource - the resource that represents the desired state that the controller is
working
to achieve. While this is often a Custom Resource, it can be also be a Kubernetes native
resource (Deployment,
ConfigMap,…).
- Secondary Resource - any resource that the controller needs to manage the reach the desired state
represented by the primary resource. These resources can be created, updated, deleted or simply
read depending on the use case. For example, the
Deployment
controller manages ReplicatSet
instances when trying to realize the state represented by the Deployment
. In this scenario,
the Deployment
is the primary resource while ReplicaSet
is one of the secondary resources
managed by the Deployment
controller.
- Dependent Resource - a feature of JOSDK, to make it easier to manage secondary resources. A
dependent resource represents a secondary resource with related reconciliation logic.