pub const CLOUDFOUNDRY_APP_ID: &str = "cloudfoundry.app.id";
The guid of the application.
Application instrumentation should use the value from environment variable VCAP_APPLICATION.application_id. This is the same value as reported by cf app [app-name] --guid.
VCAP_APPLICATION.application_id
cf app [app-name] --guid
"218fc5a9-a5f1-4b54-aa05-46717d0ab26d"