Leader election is the process of designating a single node as the organizer of some task distributed among several nodes. The leader will be responsible for managing the others and coordinate the actions performed by other nodes. If for any reason the leader fails, other nodes will elect another leader and so on. This can help to ensure that nodes don’t conflict with each other.
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Consul DNS interface allows applications to make use of service discovery without any integration with Consul. For example, instead of making HTTP API requests to Consul, a host can use the DNS server directly via name lookups like clivern.service.us.consul.
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Load balancers aren’t efficient in a dynamic environment where we scale services up or down. Consul uses a registry to keep a real-time list of services, their location, and their health. Services query the registry to discover the location of upstream services and then connect directly. This allows services to scale up/down and gracefully handle failure
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Consul is a tool for discovering and configuring services in your infrastructure. It provides several key features like service discovery, health checking, KV store and multi datacenter support.
