Building Darcy apps
Apps are groups of microservices bundled to work together. They are defined using YAML files and can be deployed and updated by uploading those YAML files through Darcy Cloud or through edgectl . An app can consist of an arbitrary number of interacting or standalone microservices that are deployed on one or may nodes.
Darcy connects to your applications to interact and share data. Applications can be configured in the Darcy Cloud platform to connect to one or more edge nodes. Apps are defined using YAML files, and can be deployed and updated by uploading those YAML files. Darcy nodes can be set up to interact with applications, process information, and move data between multiple apps.
Darcy can connect to virtually any containerized application. We’ve outlined the touchpoints for connecting to an application below.
Darcy nodes connect directly to your applications’ microservices to send, retrieve, and parse data. Many microservices are hosted in Docker or similar containerized service. More information on connecting to your microservice can be found in the microservices section.
Endpoints and Ports
Darcy connects to REST API Endpoints and TCP Ports. You can specify the port within the Application
Applications may contain microservices on more than one node. When this happens, it may be required to set up message routing. Routing is set up to transmit data from one instance of your application to another. Routing is configured within the application YAML.
routes: - name: monitor-to-viewer from: monitor to: viewer
More information on routing can be found in the Application YAML Definition section.
Variables can be defined on application inputs and outputs to be processed alongside Darcy nodes and adjacent applications. More information on declaring and using variables can be found in the Application Templating section.
Creating and Managing Applications
Creating an Application
Applications can be created within the Darcy platform by creating a YAML configuration file linking to your existing containerized application. The steps for creating and deploying a custom application in Darcy can be found here .
Deploying a Demo Application
Darcy provides a demo app you can deploy within minutes to see an example in action. You need one node live in order to deploy the demo app. More information on deploying the app can be found here .