Register Services, Discover Them & Use the KV Store

This is the service registration and discovery lab for the Consul 101 course. You work with a running datacenter of one Consul server and two Consul clients, each already running a small web application, and put the four core service-networking workflows into practice exactly as an operator would.

You will:

• Register a web service with an HTTP health check on consul-client-1 using a service definition file, then confirm it appears in the catalog as passing
• Discover the service through Consul DNS (web.service.consul on port 8600) and the HTTP catalog and health APIs, then stop the app and watch the failing health check remove the instance from passing discovery results
• Store and manage dynamic application configuration in the Consul KV store with put, get, delete, recurse, and a check-and-set (CAS) write
• Recover the failed instance and register a second instance on consul-client-2, then prove that DNS and the health API return both healthy instances for client-side load balancing

Everything is done against the v1 catalog workflow shipped as the stable default in Consul 2.0.x, the same commands the Section 4 lessons walk through.