Cluster discovery service

The cluster discovery service (CDS) is an optional API that Envoy will call to dynamically fetch cluster manager members. Envoy will reconcile the API response and add, modify, or remove known clusters depending on what is required.

• v1 CDS API
• v2 CDS API

Statistics

CDS has a statistics tree rooted at cluster_manager.cds. with the following statistics:

Name	Type	Description
config_reload	Counter	Total API fetches that resulted in a config reload due to a different config
update_attempt	Counter	Total API fetches attempted
update_success	Counter	Total API fetches completed successfully
update_failure	Counter	Total API fetches that failed (either network or schema errors)
version	Gauge	Hash of the contents from the last successful API fetch