An Application is composed of one or more Components, where each Component maps to a construct in the Kubernetes Workloads API. In most cases an Application contains Kubernetes controllers like Deployments and StatefulSets, exposed as Services. The number of components will depend on your application architecture. For example some 3-tier applications may have a few components, or even a single component, where as Microservices style applications may have hundreds of services.

Applications are defined and stored in the Catalog. Once defined, an Application can be run in one or more Environments.

Changes made to an Application in the Catalog, can be propagated to Application instances running in Environments, based on the Environment’s Update Policy.

Here are some of the common constructs you can use to build Kubernetes applications with Nirmata: