Light Controller Tutorial

The light-controller is part of the light-portal, and it is responsible for managing live instances in a microservices deployment in real-time. For most users who cannot deploy the light-portal or just want to set up an environment for development, we have peeled the light-portal functionality and created a free standard edition. The source code is not ready to open source yet, but the published docker image is free to use with a docker-compose-controller.yml in the light-docker project.

Petstore Registry to show users how to the light-controller for service interaction.
Service Discovery to show users how to leverage the light-controller for global registry and discovery.
[Kubernetes Cluster][] to show users how to use the light-controller in a Kubernetes cluster for instance management and goblal discovery.

Kubenetes Cluster

Service Discovery

The light-controller is a global registry that manages all the live instances of microservices in the system. Also, the health check ensures the registry’s information is up to date all the time, which is very valuable for service discovery. In a microservices application, before the consumer invokes a service, it can look up in the registry for all the available nodes and pick up one to establish a connection. After that, the same connection can be cached for a while or for a number of requests configured in the client. Read More »

Petstore Registry

In this tutorial, we will start the light-controller with a docker-compose and start the petstore-regsitry from the light-example-4j to register it to the controller. Once we can see the instance on the controller dashboard, we can check the health, server info, and manipulate the petstore handler’s logger level. Controller To allow other services to register to the controller, we need to start the controller first. cd ~/networknt/light-docker docker-compose -f docker-compose-controler.yml up Petstore Once the controller is up and running, we can start the petstore service. Read More »