The service discovery process in Consul is integrated with health checks, DNS, and HTTP interfaces. The Consul agent registers the service by adding an entry to the key-value store. When service discovery information is available in the Consul key-value store, that service can be discovered by other services.
In Consul, the process of service discovery uses a registry to keep a real-time list of services, their health, and their location information. It has the ability to find the location of upstream services so that the connection to it is transparent without a need for an external load balancer. However, a load balancer may be required for Ingress traffic coming to the service mesh from outside.
Consul has two approaches to service discovery, as follows:
- Sidecar proxy: Consul connects services to each other by using sidecar proxies to form a service mesh...